diff options
Diffstat (limited to 'src/nvim/fileio.c')
| -rw-r--r-- | src/nvim/fileio.c | 1928 |
1 files changed, 22 insertions, 1906 deletions
diff --git a/src/nvim/fileio.c b/src/nvim/fileio.c index fa2f72932f..bb17382f98 100644 --- a/src/nvim/fileio.c +++ b/src/nvim/fileio.c @@ -10,6 +10,7 @@ #include <inttypes.h> #include <limits.h> #include <stdbool.h> +#include <stddef.h> #include <stdio.h> #include <string.h> #include <sys/stat.h> @@ -37,7 +38,6 @@ #include "nvim/globals.h" #include "nvim/highlight_defs.h" #include "nvim/iconv.h" -#include "nvim/input.h" #include "nvim/log.h" #include "nvim/macros.h" #include "nvim/mbyte.h" @@ -76,78 +76,31 @@ # include "nvim/charset.h" #endif -#define BUFSIZE 8192 // size of normal write buffer -#define SMBUFSIZE 256 // size of emergency write buffer - // For compatibility with libuv < 1.20.0 (tested on 1.18.0) #ifndef UV_FS_COPYFILE_FICLONE # define UV_FS_COPYFILE_FICLONE 0 #endif -enum { - FIO_LATIN1 = 0x01, // convert Latin1 - FIO_UTF8 = 0x02, // convert UTF-8 - FIO_UCS2 = 0x04, // convert UCS-2 - FIO_UCS4 = 0x08, // convert UCS-4 - FIO_UTF16 = 0x10, // convert UTF-16 - FIO_ENDIAN_L = 0x80, // little endian - FIO_NOCONVERT = 0x2000, // skip encoding conversion - FIO_UCSBOM = 0x4000, // check for BOM at start of file - FIO_ALL = -1, // allow all formats -}; - -// When converting, a read() or write() may leave some bytes to be converted -// for the next call. The value is guessed... -#define CONV_RESTLEN 30 - -// We have to guess how much a sequence of bytes may expand when converting -// with iconv() to be able to allocate a buffer. -#define ICONV_MULT 8 - -// Structure to pass arguments from buf_write() to buf_write_bytes(). -struct bw_info { - int bw_fd; // file descriptor - char *bw_buf; // buffer with data to be written - int bw_len; // length of data - int bw_flags; // FIO_ flags - uint8_t bw_rest[CONV_RESTLEN]; // not converted bytes - int bw_restlen; // nr of bytes in bw_rest[] - int bw_first; // first write call - char *bw_conv_buf; // buffer for writing converted chars - size_t bw_conv_buflen; // size of bw_conv_buf - int bw_conv_error; // set for conversion error - linenr_T bw_conv_error_lnum; // first line with error or zero - linenr_T bw_start_lnum; // line number at start of buffer - iconv_t bw_iconv_fd; // descriptor for iconv() or -1 -}; - -typedef struct { - const char *num; - char *msg; - int arg; - bool alloc; -} Error_T; - -static char *err_readonly = "is read-only (cannot override: \"W\" in 'cpoptions')"; - #ifdef INCLUDE_GENERATED_DECLARATIONS # include "fileio.c.generated.h" #endif static const char *e_auchangedbuf = N_("E812: Autocommands changed buffer or buffer name"); -static const char e_no_matching_autocommands_for_buftype_str_buffer[] - = N_("E676: No matching autocommands for buftype=%s buffer"); void filemess(buf_T *buf, char *name, char *s, int attr) { int msg_scroll_save; + int prev_msg_col = msg_col; if (msg_silent != 0) { return; } + add_quoted_fname(IObuff, IOSIZE - 100, buf, name); + // Avoid an over-long translation to cause trouble. xstrlcat(IObuff, s, IOSIZE); + // For the first message may have to start a new line. // For further ones overwrite the previous one, reset msg_scroll before // calling filemess(). @@ -159,6 +112,9 @@ void filemess(buf_T *buf, char *name, char *s, int attr) msg_check_for_delay(false); } msg_start(); + if (prev_msg_col != 0 && msg_col == 0) { + msg_putchar('\r'); // overwrite any previous message. + } msg_scroll = msg_scroll_save; msg_scrolled_ign = true; // may truncate the message to avoid a hit-return prompt @@ -1797,6 +1753,9 @@ failed: msg_scrolled_ign = true; if (!read_stdin && !read_buffer) { + if (msg_col > 0) { + msg_putchar('\r'); // overwrite previous message + } p = (uint8_t *)msg_trunc_attr(IObuff, false, 0); } @@ -2096,1558 +2055,9 @@ char *new_file_message(void) return shortmess(SHM_NEW) ? _("[New]") : _("[New File]"); } -static int buf_write_do_autocmds(buf_T *buf, char **fnamep, char **sfnamep, char **ffnamep, - linenr_T start, linenr_T *endp, exarg_T *eap, bool append, - bool filtering, bool reset_changed, bool overwriting, bool whole, - const pos_T orig_start, const pos_T orig_end) -{ - linenr_T old_line_count = buf->b_ml.ml_line_count; - int msg_save = msg_scroll; - - aco_save_T aco; - bool did_cmd = false; - bool nofile_err = false; - bool empty_memline = buf->b_ml.ml_mfp == NULL; - bufref_T bufref; - - char *sfname = *sfnamep; - - // Apply PRE autocommands. - // Set curbuf to the buffer to be written. - // Careful: The autocommands may call buf_write() recursively! - bool buf_ffname = *ffnamep == buf->b_ffname; - bool buf_sfname = sfname == buf->b_sfname; - bool buf_fname_f = *fnamep == buf->b_ffname; - bool buf_fname_s = *fnamep == buf->b_sfname; - - // Set curwin/curbuf to buf and save a few things. - aucmd_prepbuf(&aco, buf); - set_bufref(&bufref, buf); - - if (append) { - did_cmd = apply_autocmds_exarg(EVENT_FILEAPPENDCMD, sfname, sfname, false, curbuf, eap); - if (!did_cmd) { - if (overwriting && bt_nofilename(curbuf)) { - nofile_err = true; - } else { - apply_autocmds_exarg(EVENT_FILEAPPENDPRE, - sfname, sfname, false, curbuf, eap); - } - } - } else if (filtering) { - apply_autocmds_exarg(EVENT_FILTERWRITEPRE, - NULL, sfname, false, curbuf, eap); - } else if (reset_changed && whole) { - bool was_changed = curbufIsChanged(); - - did_cmd = apply_autocmds_exarg(EVENT_BUFWRITECMD, sfname, sfname, false, curbuf, eap); - if (did_cmd) { - if (was_changed && !curbufIsChanged()) { - // Written everything correctly and BufWriteCmd has reset - // 'modified': Correct the undo information so that an - // undo now sets 'modified'. - u_unchanged(curbuf); - u_update_save_nr(curbuf); - } - } else { - if (overwriting && bt_nofilename(curbuf)) { - nofile_err = true; - } else { - apply_autocmds_exarg(EVENT_BUFWRITEPRE, - sfname, sfname, false, curbuf, eap); - } - } - } else { - did_cmd = apply_autocmds_exarg(EVENT_FILEWRITECMD, sfname, sfname, false, curbuf, eap); - if (!did_cmd) { - if (overwriting && bt_nofilename(curbuf)) { - nofile_err = true; - } else { - apply_autocmds_exarg(EVENT_FILEWRITEPRE, - sfname, sfname, false, curbuf, eap); - } - } - } - - // restore curwin/curbuf and a few other things - aucmd_restbuf(&aco); - - // In three situations we return here and don't write the file: - // 1. the autocommands deleted or unloaded the buffer. - // 2. The autocommands abort script processing. - // 3. If one of the "Cmd" autocommands was executed. - if (!bufref_valid(&bufref)) { - buf = NULL; - } - if (buf == NULL || (buf->b_ml.ml_mfp == NULL && !empty_memline) - || did_cmd || nofile_err - || aborting()) { - if (buf != NULL && (cmdmod.cmod_flags & CMOD_LOCKMARKS)) { - // restore the original '[ and '] positions - buf->b_op_start = orig_start; - buf->b_op_end = orig_end; - } - - no_wait_return--; - msg_scroll = msg_save; - if (nofile_err) { - semsg(_(e_no_matching_autocommands_for_buftype_str_buffer), curbuf->b_p_bt); - } - - if (nofile_err - || aborting()) { - // An aborting error, interrupt or exception in the - // autocommands. - return FAIL; - } - if (did_cmd) { - if (buf == NULL) { - // The buffer was deleted. We assume it was written - // (can't retry anyway). - return OK; - } - if (overwriting) { - // Assume the buffer was written, update the timestamp. - ml_timestamp(buf); - if (append) { - buf->b_flags &= ~BF_NEW; - } else { - buf->b_flags &= ~BF_WRITE_MASK; - } - } - if (reset_changed && buf->b_changed && !append - && (overwriting || vim_strchr(p_cpo, CPO_PLUS) != NULL)) { - // Buffer still changed, the autocommands didn't work properly. - return FAIL; - } - return OK; - } - if (!aborting()) { - emsg(_("E203: Autocommands deleted or unloaded buffer to be written")); - } - return FAIL; - } - - // The autocommands may have changed the number of lines in the file. - // When writing the whole file, adjust the end. - // When writing part of the file, assume that the autocommands only - // changed the number of lines that are to be written (tricky!). - if (buf->b_ml.ml_line_count != old_line_count) { - if (whole) { // write all - *endp = buf->b_ml.ml_line_count; - } else if (buf->b_ml.ml_line_count > old_line_count) { // more lines - *endp += buf->b_ml.ml_line_count - old_line_count; - } else { // less lines - *endp -= old_line_count - buf->b_ml.ml_line_count; - if (*endp < start) { - no_wait_return--; - msg_scroll = msg_save; - emsg(_("E204: Autocommand changed number of lines in unexpected way")); - return FAIL; - } - } - } - - // The autocommands may have changed the name of the buffer, which may - // be kept in fname, ffname and sfname. - if (buf_ffname) { - *ffnamep = buf->b_ffname; - } - if (buf_sfname) { - *sfnamep = buf->b_sfname; - } - if (buf_fname_f) { - *fnamep = buf->b_ffname; - } - if (buf_fname_s) { - *fnamep = buf->b_sfname; - } - return NOTDONE; -} - -static void buf_write_do_post_autocmds(buf_T *buf, char *fname, exarg_T *eap, bool append, - bool filtering, bool reset_changed, bool whole) -{ - aco_save_T aco; - - curbuf->b_no_eol_lnum = 0; // in case it was set by the previous read - - // Apply POST autocommands. - // Careful: The autocommands may call buf_write() recursively! - aucmd_prepbuf(&aco, buf); - - if (append) { - apply_autocmds_exarg(EVENT_FILEAPPENDPOST, fname, fname, - false, curbuf, eap); - } else if (filtering) { - apply_autocmds_exarg(EVENT_FILTERWRITEPOST, NULL, fname, - false, curbuf, eap); - } else if (reset_changed && whole) { - apply_autocmds_exarg(EVENT_BUFWRITEPOST, fname, fname, - false, curbuf, eap); - } else { - apply_autocmds_exarg(EVENT_FILEWRITEPOST, fname, fname, - false, curbuf, eap); - } - - // restore curwin/curbuf and a few other things - aucmd_restbuf(&aco); -} - -static inline Error_T set_err_num(const char *num, const char *msg) -{ - return (Error_T){ .num = num, .msg = (char *)msg, .arg = 0 }; -} - -static inline Error_T set_err_arg(const char *msg, int arg) -{ - return (Error_T){ .num = NULL, .msg = (char *)msg, .arg = arg }; -} - -static inline Error_T set_err(const char *msg) -{ - return (Error_T){ .num = NULL, .msg = (char *)msg, .arg = 0 }; -} - -static void emit_err(Error_T *e) -{ - if (e->num != NULL) { - if (e->arg != 0) { - semsg("%s: %s%s: %s", e->num, IObuff, e->msg, os_strerror(e->arg)); - } else { - semsg("%s: %s%s", e->num, IObuff, e->msg); - } - } else if (e->arg != 0) { - semsg(e->msg, os_strerror(e->arg)); - } else { - emsg(e->msg); - } - if (e->alloc) { - xfree(e->msg); - } -} - -#if defined(UNIX) - -static int get_fileinfo_os(char *fname, FileInfo *file_info_old, bool overwriting, long *perm, - bool *device, bool *newfile, Error_T *err) -{ - *perm = -1; - if (!os_fileinfo(fname, file_info_old)) { - *newfile = true; - } else { - *perm = (long)file_info_old->stat.st_mode; - if (!S_ISREG(file_info_old->stat.st_mode)) { // not a file - if (S_ISDIR(file_info_old->stat.st_mode)) { - *err = set_err_num("E502", _("is a directory")); - return FAIL; - } - if (os_nodetype(fname) != NODE_WRITABLE) { - *err = set_err_num("E503", _("is not a file or writable device")); - return FAIL; - } - // It's a device of some kind (or a fifo) which we can write to - // but for which we can't make a backup. - *device = true; - *newfile = true; - *perm = -1; - } - } - return OK; -} - -#else - -static int get_fileinfo_os(char *fname, FileInfo *file_info_old, bool overwriting, long *perm, - bool *device, bool *newfile, Error_T *err) -{ - // Check for a writable device name. - char nodetype = fname == NULL ? NODE_OTHER : (char)os_nodetype(fname); - if (nodetype == NODE_OTHER) { - *err = set_err_num("E503", _("is not a file or writable device")); - return FAIL; - } - if (nodetype == NODE_WRITABLE) { - *device = true; - *newfile = true; - *perm = -1; - } else { - *perm = os_getperm(fname); - if (*perm < 0) { - *newfile = true; - } else if (os_isdir(fname)) { - *err = set_err_num("E502", _("is a directory")); - return FAIL; - } - if (overwriting) { - os_fileinfo(fname, file_info_old); - } - } - return OK; -} - -#endif - -/// @param buf -/// @param fname File name -/// @param overwriting -/// @param forceit -/// @param[out] file_info_old -/// @param[out] perm -/// @param[out] device -/// @param[out] newfile -/// @param[out] readonly -static int get_fileinfo(buf_T *buf, char *fname, bool overwriting, bool forceit, - FileInfo *file_info_old, long *perm, bool *device, bool *newfile, - bool *readonly, Error_T *err) -{ - if (get_fileinfo_os(fname, file_info_old, overwriting, perm, device, newfile, err) == FAIL) { - return FAIL; - } - - *readonly = false; // overwritten file is read-only - - if (!*device && !*newfile) { - // Check if the file is really writable (when renaming the file to - // make a backup we won't discover it later). - *readonly = !os_file_is_writable(fname); - - if (!forceit && *readonly) { - if (vim_strchr(p_cpo, CPO_FWRITE) != NULL) { - *err = set_err_num("E504", _(err_readonly)); - } else { - *err = set_err_num("E505", _("is read-only (add ! to override)")); - } - return FAIL; - } - - // If 'forceit' is false, check if the timestamp hasn't changed since reading the file. - if (overwriting && !forceit) { - int retval = check_mtime(buf, file_info_old); - if (retval == FAIL) { - return FAIL; - } - } - } - return OK; -} - -static int buf_write_make_backup(char *fname, bool append, FileInfo *file_info_old, vim_acl_T acl, - long perm, unsigned int bkc, bool file_readonly, bool forceit, - int *backup_copyp, char **backupp, Error_T *err) -{ - FileInfo file_info; - const bool no_prepend_dot = false; - - if ((bkc & BKC_YES) || append) { // "yes" - *backup_copyp = true; - } else if ((bkc & BKC_AUTO)) { // "auto" - // Don't rename the file when: - // - it's a hard link - // - it's a symbolic link - // - we don't have write permission in the directory - if (os_fileinfo_hardlinks(file_info_old) > 1 - || !os_fileinfo_link(fname, &file_info) - || !os_fileinfo_id_equal(&file_info, file_info_old)) { - *backup_copyp = true; - } else { - // Check if we can create a file and set the owner/group to - // the ones from the original file. - // First find a file name that doesn't exist yet (use some - // arbitrary numbers). - STRCPY(IObuff, fname); - for (int i = 4913;; i += 123) { - char *tail = path_tail(IObuff); - size_t size = (size_t)(tail - IObuff); - snprintf(tail, IOSIZE - size, "%d", i); - if (!os_fileinfo_link(IObuff, &file_info)) { - break; - } - } - int fd = os_open(IObuff, - O_CREAT|O_WRONLY|O_EXCL|O_NOFOLLOW, (int)perm); - if (fd < 0) { // can't write in directory - *backup_copyp = true; - } else { -#ifdef UNIX - os_fchown(fd, (uv_uid_t)file_info_old->stat.st_uid, (uv_gid_t)file_info_old->stat.st_gid); - if (!os_fileinfo(IObuff, &file_info) - || file_info.stat.st_uid != file_info_old->stat.st_uid - || file_info.stat.st_gid != file_info_old->stat.st_gid - || (long)file_info.stat.st_mode != perm) { - *backup_copyp = true; - } -#endif - // Close the file before removing it, on MS-Windows we - // can't delete an open file. - close(fd); - os_remove(IObuff); - } - } - } - - // Break symlinks and/or hardlinks if we've been asked to. - if ((bkc & BKC_BREAKSYMLINK) || (bkc & BKC_BREAKHARDLINK)) { -#ifdef UNIX - bool file_info_link_ok = os_fileinfo_link(fname, &file_info); - - // Symlinks. - if ((bkc & BKC_BREAKSYMLINK) - && file_info_link_ok - && !os_fileinfo_id_equal(&file_info, file_info_old)) { - *backup_copyp = false; - } - - // Hardlinks. - if ((bkc & BKC_BREAKHARDLINK) - && os_fileinfo_hardlinks(file_info_old) > 1 - && (!file_info_link_ok - || os_fileinfo_id_equal(&file_info, file_info_old))) { - *backup_copyp = false; - } -#endif - } - - // make sure we have a valid backup extension to use - char *backup_ext = *p_bex == NUL ? ".bak" : p_bex; - - if (*backup_copyp) { - int some_error = false; - - // Try to make the backup in each directory in the 'bdir' option. - // - // Unix semantics has it, that we may have a writable file, - // that cannot be recreated with a simple open(..., O_CREAT, ) e.g: - // - the directory is not writable, - // - the file may be a symbolic link, - // - the file may belong to another user/group, etc. - // - // For these reasons, the existing writable file must be truncated - // and reused. Creation of a backup COPY will be attempted. - char *dirp = p_bdir; - while (*dirp) { - // Isolate one directory name, using an entry in 'bdir'. - size_t dir_len = copy_option_part(&dirp, IObuff, IOSIZE, ","); - char *p = IObuff + dir_len; - bool trailing_pathseps = after_pathsep(IObuff, p) && p[-1] == p[-2]; - if (trailing_pathseps) { - IObuff[dir_len - 2] = NUL; - } - if (*dirp == NUL && !os_isdir(IObuff)) { - int ret; - char *failed_dir; - if ((ret = os_mkdir_recurse(IObuff, 0755, &failed_dir, NULL)) != 0) { - semsg(_("E303: Unable to create directory \"%s\" for backup file: %s"), - failed_dir, os_strerror(ret)); - xfree(failed_dir); - } - } - if (trailing_pathseps) { - // Ends with '//', Use Full path - if ((p = make_percent_swname(IObuff, fname)) - != NULL) { - *backupp = modname(p, backup_ext, no_prepend_dot); - xfree(p); - } - } - - char *rootname = get_file_in_dir(fname, IObuff); - if (rootname == NULL) { - some_error = true; // out of memory - goto nobackup; - } - - FileInfo file_info_new; - { - // - // Make the backup file name. - // - if (*backupp == NULL) { - *backupp = modname(rootname, backup_ext, no_prepend_dot); - } - - if (*backupp == NULL) { - xfree(rootname); - some_error = true; // out of memory - goto nobackup; - } - - // Check if backup file already exists. - if (os_fileinfo(*backupp, &file_info_new)) { - if (os_fileinfo_id_equal(&file_info_new, file_info_old)) { - // - // Backup file is same as original file. - // May happen when modname() gave the same file back (e.g. silly - // link). If we don't check here, we either ruin the file when - // copying or erase it after writing. - // - XFREE_CLEAR(*backupp); // no backup file to delete - } else if (!p_bk) { - // We are not going to keep the backup file, so don't - // delete an existing one, and try to use another name instead. - // Change one character, just before the extension. - // - char *wp = *backupp + strlen(*backupp) - 1 - strlen(backup_ext); - if (wp < *backupp) { // empty file name ??? - wp = *backupp; - } - *wp = 'z'; - while (*wp > 'a' && os_fileinfo(*backupp, &file_info_new)) { - (*wp)--; - } - // They all exist??? Must be something wrong. - if (*wp == 'a') { - XFREE_CLEAR(*backupp); - } - } - } - } - xfree(rootname); - - // Try to create the backup file - if (*backupp != NULL) { - // remove old backup, if present - os_remove(*backupp); - - // set file protection same as original file, but - // strip s-bit. - (void)os_setperm(*backupp, perm & 0777); - -#ifdef UNIX - // - // Try to set the group of the backup same as the original file. If - // this fails, set the protection bits for the group same as the - // protection bits for others. - // - if (file_info_new.stat.st_gid != file_info_old->stat.st_gid - && os_chown(*backupp, (uv_uid_t)-1, (uv_gid_t)file_info_old->stat.st_gid) != 0) { - os_setperm(*backupp, ((int)perm & 0707) | (((int)perm & 07) << 3)); - } -#endif - - // copy the file - if (os_copy(fname, *backupp, UV_FS_COPYFILE_FICLONE) != 0) { - *err = set_err(_("E509: Cannot create backup file (add ! to override)")); - XFREE_CLEAR(*backupp); - *backupp = NULL; - continue; - } - -#ifdef UNIX - os_file_settime(*backupp, - (double)file_info_old->stat.st_atim.tv_sec, - (double)file_info_old->stat.st_mtim.tv_sec); -#endif - os_set_acl(*backupp, acl); - *err = set_err(NULL); - break; - } - } - -nobackup: - if (*backupp == NULL && err->msg == NULL) { - *err = set_err(_("E509: Cannot create backup file (add ! to override)")); - } - // Ignore errors when forceit is true. - if ((some_error || err->msg != NULL) && !forceit) { - return FAIL; - } - *err = set_err(NULL); - } else { - // Make a backup by renaming the original file. - - // If 'cpoptions' includes the "W" flag, we don't want to - // overwrite a read-only file. But rename may be possible - // anyway, thus we need an extra check here. - if (file_readonly && vim_strchr(p_cpo, CPO_FWRITE) != NULL) { - *err = set_err_num("E504", _(err_readonly)); - return FAIL; - } - - // Form the backup file name - change path/fo.o.h to - // path/fo.o.h.bak Try all directories in 'backupdir', first one - // that works is used. - char *dirp = p_bdir; - while (*dirp) { - // Isolate one directory name and make the backup file name. - size_t dir_len = copy_option_part(&dirp, IObuff, IOSIZE, ","); - char *p = IObuff + dir_len; - bool trailing_pathseps = after_pathsep(IObuff, p) && p[-1] == p[-2]; - if (trailing_pathseps) { - IObuff[dir_len - 2] = NUL; - } - if (*dirp == NUL && !os_isdir(IObuff)) { - int ret; - char *failed_dir; - if ((ret = os_mkdir_recurse(IObuff, 0755, &failed_dir, NULL)) != 0) { - semsg(_("E303: Unable to create directory \"%s\" for backup file: %s"), - failed_dir, os_strerror(ret)); - xfree(failed_dir); - } - } - if (trailing_pathseps) { - // path ends with '//', use full path - if ((p = make_percent_swname(IObuff, fname)) - != NULL) { - *backupp = modname(p, backup_ext, no_prepend_dot); - xfree(p); - } - } - - if (*backupp == NULL) { - char *rootname = get_file_in_dir(fname, IObuff); - if (rootname == NULL) { - *backupp = NULL; - } else { - *backupp = modname(rootname, backup_ext, no_prepend_dot); - xfree(rootname); - } - } - - if (*backupp != NULL) { - // If we are not going to keep the backup file, don't - // delete an existing one, try to use another name. - // Change one character, just before the extension. - if (!p_bk && os_path_exists(*backupp)) { - p = *backupp + strlen(*backupp) - 1 - strlen(backup_ext); - if (p < *backupp) { // empty file name ??? - p = *backupp; - } - *p = 'z'; - while (*p > 'a' && os_path_exists(*backupp)) { - (*p)--; - } - // They all exist??? Must be something wrong! - if (*p == 'a') { - XFREE_CLEAR(*backupp); - } - } - } - if (*backupp != NULL) { - // Delete any existing backup and move the current version - // to the backup. For safety, we don't remove the backup - // until the write has finished successfully. And if the - // 'backup' option is set, leave it around. - - // If the renaming of the original file to the backup file - // works, quit here. - /// - if (vim_rename(fname, *backupp) == 0) { - break; - } - - XFREE_CLEAR(*backupp); // don't do the rename below - } - } - if (*backupp == NULL && !forceit) { - *err = set_err(_("E510: Can't make backup file (add ! to override)")); - return FAIL; - } - } - return OK; -} - -/// buf_write() - write to file "fname" lines "start" through "end" -/// -/// We do our own buffering here because fwrite() is so slow. -/// -/// If "forceit" is true, we don't care for errors when attempting backups. -/// In case of an error everything possible is done to restore the original -/// file. But when "forceit" is true, we risk losing it. -/// -/// When "reset_changed" is true and "append" == false and "start" == 1 and -/// "end" == curbuf->b_ml.ml_line_count, reset curbuf->b_changed. -/// -/// This function must NOT use NameBuff (because it's called by autowrite()). -/// -/// -/// @param eap for forced 'ff' and 'fenc', can be NULL! -/// @param append append to the file -/// -/// @return FAIL for failure, OK otherwise -int buf_write(buf_T *buf, char *fname, char *sfname, linenr_T start, linenr_T end, exarg_T *eap, - int append, int forceit, int reset_changed, int filtering) -{ - int retval = OK; - int msg_save = msg_scroll; - int prev_got_int = got_int; - // writing everything - int whole = (start == 1 && end == buf->b_ml.ml_line_count); - int write_undo_file = false; - context_sha256_T sha_ctx; - unsigned int bkc = get_bkc_value(buf); - - if (fname == NULL || *fname == NUL) { // safety check - return FAIL; - } - if (buf->b_ml.ml_mfp == NULL) { - // This can happen during startup when there is a stray "w" in the - // vimrc file. - emsg(_(e_emptybuf)); - return FAIL; - } - - // Disallow writing in secure mode. - if (check_secure()) { - return FAIL; - } - - // Avoid a crash for a long name. - if (strlen(fname) >= MAXPATHL) { - emsg(_(e_longname)); - return FAIL; - } - - // must init bw_conv_buf and bw_iconv_fd before jumping to "fail" - struct bw_info write_info; // info for buf_write_bytes() - write_info.bw_conv_buf = NULL; - write_info.bw_conv_error = false; - write_info.bw_conv_error_lnum = 0; - write_info.bw_restlen = 0; - write_info.bw_iconv_fd = (iconv_t)-1; - - // After writing a file changedtick changes but we don't want to display - // the line. - ex_no_reprint = true; - - // If there is no file name yet, use the one for the written file. - // BF_NOTEDITED is set to reflect this (in case the write fails). - // Don't do this when the write is for a filter command. - // Don't do this when appending. - // Only do this when 'cpoptions' contains the 'F' flag. - if (buf->b_ffname == NULL - && reset_changed - && whole - && buf == curbuf - && !bt_nofilename(buf) - && !filtering - && (!append || vim_strchr(p_cpo, CPO_FNAMEAPP) != NULL) - && vim_strchr(p_cpo, CPO_FNAMEW) != NULL) { - if (set_rw_fname(fname, sfname) == FAIL) { - return FAIL; - } - buf = curbuf; // just in case autocmds made "buf" invalid - } - - if (sfname == NULL) { - sfname = fname; - } - - // For Unix: Use the short file name whenever possible. - // Avoids problems with networks and when directory names are changed. - // Don't do this for Windows, a "cd" in a sub-shell may have moved us to - // another directory, which we don't detect. - char *ffname = fname; // remember full fname -#ifdef UNIX - fname = sfname; -#endif - -// true if writing over original - int overwriting = buf->b_ffname != NULL && path_fnamecmp(ffname, buf->b_ffname) == 0; - - no_wait_return++; // don't wait for return yet - - const pos_T orig_start = buf->b_op_start; - const pos_T orig_end = buf->b_op_end; - - // Set '[ and '] marks to the lines to be written. - buf->b_op_start.lnum = start; - buf->b_op_start.col = 0; - buf->b_op_end.lnum = end; - buf->b_op_end.col = 0; - - int res = buf_write_do_autocmds(buf, &fname, &sfname, &ffname, start, &end, eap, append, - filtering, reset_changed, overwriting, whole, orig_start, - orig_end); - if (res != NOTDONE) { - return res; - } - - if (cmdmod.cmod_flags & CMOD_LOCKMARKS) { - // restore the original '[ and '] positions - buf->b_op_start = orig_start; - buf->b_op_end = orig_end; - } - - if (shortmess(SHM_OVER) && !exiting) { - msg_scroll = false; // overwrite previous file message - } else { - msg_scroll = true; // don't overwrite previous file message - } - if (!filtering) { - // show that we are busy -#ifndef UNIX - filemess(buf, sfname, "", 0); -#else - filemess(buf, fname, "", 0); -#endif - } - msg_scroll = false; // always overwrite the file message now - - char *buffer = verbose_try_malloc(BUFSIZE); - int bufsize; - char smallbuf[SMBUFSIZE]; - // can't allocate big buffer, use small one (to be able to write when out of - // memory) - if (buffer == NULL) { - buffer = smallbuf; - bufsize = SMBUFSIZE; - } else { - bufsize = BUFSIZE; - } - - Error_T err = { 0 }; - long perm; // file permissions - bool newfile = false; // true if file doesn't exist yet - bool device = false; // writing to a device - bool file_readonly = false; // overwritten file is read-only - char *backup = NULL; - char *fenc_tofree = NULL; // allocated "fenc" - - // Get information about original file (if there is one). - FileInfo file_info_old; - - vim_acl_T acl = NULL; // ACL copied from original file to - // backup or new file - - if (get_fileinfo(buf, fname, overwriting, forceit, &file_info_old, &perm, &device, &newfile, - &file_readonly, &err) == FAIL) { - goto fail; - } - - // For systems that support ACL: get the ACL from the original file. - if (!newfile) { - acl = os_get_acl(fname); - } - - // If 'backupskip' is not empty, don't make a backup for some files. - bool dobackup = (p_wb || p_bk || *p_pm != NUL); - if (dobackup && *p_bsk != NUL && match_file_list(p_bsk, sfname, ffname)) { - dobackup = false; - } - - int backup_copy = false; // copy the original file? - - // Save the value of got_int and reset it. We don't want a previous - // interruption cancel writing, only hitting CTRL-C while writing should - // abort it. - prev_got_int = got_int; - got_int = false; - - // Mark the buffer as 'being saved' to prevent changed buffer warnings - buf->b_saving = true; - - // If we are not appending or filtering, the file exists, and the - // 'writebackup', 'backup' or 'patchmode' option is set, need a backup. - // When 'patchmode' is set also make a backup when appending. - // - // Do not make any backup, if 'writebackup' and 'backup' are both switched - // off. This helps when editing large files on almost-full disks. - if (!(append && *p_pm == NUL) && !filtering && perm >= 0 && dobackup) { - if (buf_write_make_backup(fname, append, &file_info_old, acl, perm, bkc, file_readonly, forceit, - &backup_copy, &backup, &err) == FAIL) { - retval = FAIL; - goto fail; - } - } - -#if defined(UNIX) - int made_writable = false; // 'w' bit has been set - - // When using ":w!" and the file was read-only: make it writable - if (forceit && perm >= 0 && !(perm & 0200) - && file_info_old.stat.st_uid == getuid() - && vim_strchr(p_cpo, CPO_FWRITE) == NULL) { - perm |= 0200; - (void)os_setperm(fname, (int)perm); - made_writable = true; - } -#endif - - // When using ":w!" and writing to the current file, 'readonly' makes no - // sense, reset it, unless 'Z' appears in 'cpoptions'. - if (forceit && overwriting && vim_strchr(p_cpo, CPO_KEEPRO) == NULL) { - buf->b_p_ro = false; - need_maketitle = true; // set window title later - status_redraw_all(); // redraw status lines later - } - - if (end > buf->b_ml.ml_line_count) { - end = buf->b_ml.ml_line_count; - } - if (buf->b_ml.ml_flags & ML_EMPTY) { - start = end + 1; - } - - char *wfname = NULL; // name of file to write to - - // If the original file is being overwritten, there is a small chance that - // we crash in the middle of writing. Therefore the file is preserved now. - // This makes all block numbers positive so that recovery does not need - // the original file. - // Don't do this if there is a backup file and we are exiting. - if (reset_changed && !newfile && overwriting - && !(exiting && backup != NULL)) { - ml_preserve(buf, false, !!p_fs); - if (got_int) { - err = set_err(_(e_interr)); - goto restore_backup; - } - } - - // Default: write the file directly. May write to a temp file for - // multi-byte conversion. - wfname = fname; - - char *fenc; // effective 'fileencoding' - - // Check for forced 'fileencoding' from "++opt=val" argument. - if (eap != NULL && eap->force_enc != 0) { - fenc = eap->cmd + eap->force_enc; - fenc = enc_canonize(fenc); - fenc_tofree = fenc; - } else { - fenc = buf->b_p_fenc; - } - - // Check if the file needs to be converted. - int converted = need_conversion(fenc); - int wb_flags = 0; - - // Check if UTF-8 to UCS-2/4 or Latin1 conversion needs to be done. Or - // Latin1 to Unicode conversion. This is handled in buf_write_bytes(). - // Prepare the flags for it and allocate bw_conv_buf when needed. - if (converted) { - wb_flags = get_fio_flags(fenc); - if (wb_flags & (FIO_UCS2 | FIO_UCS4 | FIO_UTF16 | FIO_UTF8)) { - // Need to allocate a buffer to translate into. - if (wb_flags & (FIO_UCS2 | FIO_UTF16 | FIO_UTF8)) { - write_info.bw_conv_buflen = (size_t)bufsize * 2; - } else { // FIO_UCS4 - write_info.bw_conv_buflen = (size_t)bufsize * 4; - } - write_info.bw_conv_buf = verbose_try_malloc(write_info.bw_conv_buflen); - if (!write_info.bw_conv_buf) { - end = 0; - } - } - } - - if (converted && wb_flags == 0) { - // Use iconv() conversion when conversion is needed and it's not done - // internally. - write_info.bw_iconv_fd = (iconv_t)my_iconv_open(fenc, "utf-8"); - if (write_info.bw_iconv_fd != (iconv_t)-1) { - // We're going to use iconv(), allocate a buffer to convert in. - write_info.bw_conv_buflen = (size_t)bufsize * ICONV_MULT; - write_info.bw_conv_buf = verbose_try_malloc(write_info.bw_conv_buflen); - if (!write_info.bw_conv_buf) { - end = 0; - } - write_info.bw_first = true; - } else { - // When the file needs to be converted with 'charconvert' after - // writing, write to a temp file instead and let the conversion - // overwrite the original file. - if (*p_ccv != NUL) { - wfname = vim_tempname(); - if (wfname == NULL) { // Can't write without a tempfile! - err = set_err(_("E214: Can't find temp file for writing")); - goto restore_backup; - } - } - } - } - - int notconverted = false; - - if (converted && wb_flags == 0 - && write_info.bw_iconv_fd == (iconv_t)-1 - && wfname == fname) { - if (!forceit) { - err = set_err(_("E213: Cannot convert (add ! to write without conversion)")); - goto restore_backup; - } - notconverted = true; - } - - int no_eol = false; // no end-of-line written - long nchars; - linenr_T lnum; - int fileformat; - int checking_conversion; - - int fd; - - // If conversion is taking place, we may first pretend to write and check - // for conversion errors. Then loop again to write for real. - // When not doing conversion this writes for real right away. - for (checking_conversion = true;; checking_conversion = false) { - // There is no need to check conversion when: - // - there is no conversion - // - we make a backup file, that can be restored in case of conversion - // failure. - if (!converted || dobackup) { - checking_conversion = false; - } - - if (checking_conversion) { - // Make sure we don't write anything. - fd = -1; - write_info.bw_fd = fd; - } else { - // Open the file "wfname" for writing. - // We may try to open the file twice: If we can't write to the file - // and forceit is true we delete the existing file and try to - // create a new one. If this still fails we may have lost the - // original file! (this may happen when the user reached his - // quotum for number of files). - // Appending will fail if the file does not exist and forceit is - // false. - const int fflags = O_WRONLY | (append - ? (forceit ? (O_APPEND | O_CREAT) : O_APPEND) - : (O_CREAT | O_TRUNC)); - const int mode = perm < 0 ? 0666 : (perm & 0777); - - while ((fd = os_open(wfname, fflags, mode)) < 0) { - // A forced write will try to create a new file if the old one - // is still readonly. This may also happen when the directory - // is read-only. In that case the mch_remove() will fail. - if (err.msg == NULL) { -#ifdef UNIX - FileInfo file_info; - - // Don't delete the file when it's a hard or symbolic link. - if ((!newfile && os_fileinfo_hardlinks(&file_info_old) > 1) - || (os_fileinfo_link(fname, &file_info) - && !os_fileinfo_id_equal(&file_info, &file_info_old))) { - err = set_err(_("E166: Can't open linked file for writing")); - } else { - err = set_err_arg(_("E212: Can't open file for writing: %s"), fd); - if (forceit && vim_strchr(p_cpo, CPO_FWRITE) == NULL && perm >= 0) { - // we write to the file, thus it should be marked - // writable after all - if (!(perm & 0200)) { - made_writable = true; - } - perm |= 0200; - if (file_info_old.stat.st_uid != getuid() - || file_info_old.stat.st_gid != getgid()) { - perm &= 0777; - } - if (!append) { // don't remove when appending - os_remove(wfname); - } - continue; - } - } -#else - err = set_err_arg(_("E212: Can't open file for writing: %s"), fd); - if (forceit && vim_strchr(p_cpo, CPO_FWRITE) == NULL && perm >= 0) { - if (!append) { // don't remove when appending - os_remove(wfname); - } - continue; - } -#endif - } - -restore_backup: - { - // If we failed to open the file, we don't need a backup. Throw it - // away. If we moved or removed the original file try to put the - // backup in its place. - if (backup != NULL && wfname == fname) { - if (backup_copy) { - // There is a small chance that we removed the original, - // try to move the copy in its place. - // This may not work if the vim_rename() fails. - // In that case we leave the copy around. - // If file does not exist, put the copy in its place - if (!os_path_exists(fname)) { - vim_rename(backup, fname); - } - // if original file does exist throw away the copy - if (os_path_exists(fname)) { - os_remove(backup); - } - } else { - // try to put the original file back - vim_rename(backup, fname); - } - } - - // if original file no longer exists give an extra warning - if (!newfile && !os_path_exists(fname)) { - end = 0; - } - } - - if (wfname != fname) { - xfree(wfname); - } - goto fail; - } - write_info.bw_fd = fd; - } - err = set_err(NULL); - - write_info.bw_buf = buffer; - nchars = 0; - - // use "++bin", "++nobin" or 'binary' - int write_bin; - if (eap != NULL && eap->force_bin != 0) { - write_bin = (eap->force_bin == FORCE_BIN); - } else { - write_bin = buf->b_p_bin; - } - - // Skip the BOM when appending and the file already existed, the BOM - // only makes sense at the start of the file. - if (buf->b_p_bomb && !write_bin && (!append || perm < 0)) { - write_info.bw_len = make_bom(buffer, fenc); - if (write_info.bw_len > 0) { - // don't convert - write_info.bw_flags = FIO_NOCONVERT | wb_flags; - if (buf_write_bytes(&write_info) == FAIL) { - end = 0; - } else { - nchars += write_info.bw_len; - } - } - } - write_info.bw_start_lnum = start; - - write_undo_file = (buf->b_p_udf && overwriting && !append - && !filtering && reset_changed && !checking_conversion); - if (write_undo_file) { - // Prepare for computing the hash value of the text. - sha256_start(&sha_ctx); - } - - write_info.bw_len = bufsize; - write_info.bw_flags = wb_flags; - fileformat = get_fileformat_force(buf, eap); - char *s = buffer; - int len = 0; - for (lnum = start; lnum <= end; lnum++) { - // The next while loop is done once for each character written. - // Keep it fast! - char *ptr = ml_get_buf(buf, lnum, false) - 1; - if (write_undo_file) { - sha256_update(&sha_ctx, (uint8_t *)ptr + 1, (uint32_t)(strlen(ptr + 1) + 1)); - } - char c; - while ((c = *++ptr) != NUL) { - if (c == NL) { - *s = NUL; // replace newlines with NULs - } else if (c == CAR && fileformat == EOL_MAC) { - *s = NL; // Mac: replace CRs with NLs - } else { - *s = c; - } - s++; - if (++len != bufsize) { - continue; - } - if (buf_write_bytes(&write_info) == FAIL) { - end = 0; // write error: break loop - break; - } - nchars += bufsize; - s = buffer; - len = 0; - write_info.bw_start_lnum = lnum; - } - // write failed or last line has no EOL: stop here - if (end == 0 - || (lnum == end - && (write_bin || !buf->b_p_fixeol) - && ((write_bin && lnum == buf->b_no_eol_lnum) - || (lnum == buf->b_ml.ml_line_count && !buf->b_p_eol)))) { - lnum++; // written the line, count it - no_eol = true; - break; - } - if (fileformat == EOL_UNIX) { - *s++ = NL; - } else { - *s++ = CAR; // EOL_MAC or EOL_DOS: write CR - if (fileformat == EOL_DOS) { // write CR-NL - if (++len == bufsize) { - if (buf_write_bytes(&write_info) == FAIL) { - end = 0; // write error: break loop - break; - } - nchars += bufsize; - s = buffer; - len = 0; - } - *s++ = NL; - } - } - if (++len == bufsize) { - if (buf_write_bytes(&write_info) == FAIL) { - end = 0; // Write error: break loop. - break; - } - nchars += bufsize; - s = buffer; - len = 0; - - os_breakcheck(); - if (got_int) { - end = 0; // Interrupted, break loop. - break; - } - } - } - if (len > 0 && end > 0) { - write_info.bw_len = len; - if (buf_write_bytes(&write_info) == FAIL) { - end = 0; // write error - } - nchars += len; - } - - if (!buf->b_p_fixeol && buf->b_p_eof) { - // write trailing CTRL-Z - (void)write_eintr(write_info.bw_fd, "\x1a", 1); - } - - // Stop when writing done or an error was encountered. - if (!checking_conversion || end == 0) { - break; - } - - // If no error happened until now, writing should be ok, so loop to - // really write the buffer. - } - - // If we started writing, finish writing. Also when an error was - // encountered. - if (!checking_conversion) { - // On many journalling file systems there is a bug that causes both the - // original and the backup file to be lost when halting the system right - // after writing the file. That's because only the meta-data is - // journalled. Syncing the file slows down the system, but assures it has - // been written to disk and we don't lose it. - // For a device do try the fsync() but don't complain if it does not work - // (could be a pipe). - // If the 'fsync' option is false, don't fsync(). Useful for laptops. - int error; - if (p_fs && (error = os_fsync(fd)) != 0 && !device - // fsync not supported on this storage. - && error != UV_ENOTSUP) { - err = set_err_arg(e_fsync, error); - end = 0; - } - -#ifdef UNIX - // When creating a new file, set its owner/group to that of the original - // file. Get the new device and inode number. - if (backup != NULL && !backup_copy) { - // don't change the owner when it's already OK, some systems remove - // permission or ACL stuff - FileInfo file_info; - if (!os_fileinfo(wfname, &file_info) - || file_info.stat.st_uid != file_info_old.stat.st_uid - || file_info.stat.st_gid != file_info_old.stat.st_gid) { - os_fchown(fd, (uv_uid_t)file_info_old.stat.st_uid, (uv_gid_t)file_info_old.stat.st_gid); - if (perm >= 0) { // Set permission again, may have changed. - (void)os_setperm(wfname, (int)perm); - } - } - buf_set_file_id(buf); - } else if (!buf->file_id_valid) { - // Set the file_id when creating a new file. - buf_set_file_id(buf); - } -#endif - - if ((error = os_close(fd)) != 0) { - err = set_err_arg(_("E512: Close failed: %s"), error); - end = 0; - } - -#ifdef UNIX - if (made_writable) { - perm &= ~0200; // reset 'w' bit for security reasons - } -#endif - if (perm >= 0) { // Set perm. of new file same as old file. - (void)os_setperm(wfname, (int)perm); - } - // Probably need to set the ACL before changing the user (can't set the - // ACL on a file the user doesn't own). - if (!backup_copy) { - os_set_acl(wfname, acl); - } - - if (wfname != fname) { - // The file was written to a temp file, now it needs to be converted - // with 'charconvert' to (overwrite) the output file. - if (end != 0) { - if (eval_charconvert("utf-8", fenc, wfname, fname) == FAIL) { - write_info.bw_conv_error = true; - end = 0; - } - } - os_remove(wfname); - xfree(wfname); - } - } - - if (end == 0) { - // Error encountered. - if (err.msg == NULL) { - if (write_info.bw_conv_error) { - if (write_info.bw_conv_error_lnum == 0) { - err = set_err(_("E513: write error, conversion failed " - "(make 'fenc' empty to override)")); - } else { - err = set_err(xmalloc(300)); - err.alloc = true; - vim_snprintf(err.msg, 300, // NOLINT(runtime/printf) - _("E513: write error, conversion failed in line %" PRIdLINENR - " (make 'fenc' empty to override)"), - write_info.bw_conv_error_lnum); - } - } else if (got_int) { - err = set_err(_(e_interr)); - } else { - err = set_err(_("E514: write error (file system full?)")); - } - } - - // If we have a backup file, try to put it in place of the new file, - // because the new file is probably corrupt. This avoids losing the - // original file when trying to make a backup when writing the file a - // second time. - // When "backup_copy" is set we need to copy the backup over the new - // file. Otherwise rename the backup file. - // If this is OK, don't give the extra warning message. - if (backup != NULL) { - if (backup_copy) { - // This may take a while, if we were interrupted let the user - // know we got the message. - if (got_int) { - msg(_(e_interr)); - ui_flush(); - } - - // copy the file. - if (os_copy(backup, fname, UV_FS_COPYFILE_FICLONE) - == 0) { - end = 1; // success - } - } else { - if (vim_rename(backup, fname) == 0) { - end = 1; - } - } - } - goto fail; - } - - lnum -= start; // compute number of written lines - no_wait_return--; // may wait for return now - -#if !defined(UNIX) - fname = sfname; // use shortname now, for the messages -#endif - if (!filtering) { - add_quoted_fname(IObuff, IOSIZE, buf, fname); - bool insert_space = false; - if (write_info.bw_conv_error) { - STRCAT(IObuff, _(" CONVERSION ERROR")); - insert_space = true; - if (write_info.bw_conv_error_lnum != 0) { - vim_snprintf_add(IObuff, IOSIZE, _(" in line %" PRId64 ";"), - (int64_t)write_info.bw_conv_error_lnum); - } - } else if (notconverted) { - STRCAT(IObuff, _("[NOT converted]")); - insert_space = true; - } else if (converted) { - STRCAT(IObuff, _("[converted]")); - insert_space = true; - } - if (device) { - STRCAT(IObuff, _("[Device]")); - insert_space = true; - } else if (newfile) { - STRCAT(IObuff, new_file_message()); - insert_space = true; - } - if (no_eol) { - msg_add_eol(); - insert_space = true; - } - // may add [unix/dos/mac] - if (msg_add_fileformat(fileformat)) { - insert_space = true; - } - msg_add_lines(insert_space, (long)lnum, nchars); // add line/char count - if (!shortmess(SHM_WRITE)) { - if (append) { - STRCAT(IObuff, shortmess(SHM_WRI) ? _(" [a]") : _(" appended")); - } else { - STRCAT(IObuff, shortmess(SHM_WRI) ? _(" [w]") : _(" written")); - } - } - - set_keep_msg(msg_trunc_attr(IObuff, false, 0), 0); - } - - // When written everything correctly: reset 'modified'. Unless not - // writing to the original file and '+' is not in 'cpoptions'. - if (reset_changed && whole && !append - && !write_info.bw_conv_error - && (overwriting || vim_strchr(p_cpo, CPO_PLUS) != NULL)) { - unchanged(buf, true, false); - const varnumber_T changedtick = buf_get_changedtick(buf); - if (buf->b_last_changedtick + 1 == changedtick) { - // b:changedtick may be incremented in unchanged() but that - // should not trigger a TextChanged event. - buf->b_last_changedtick = changedtick; - } - u_unchanged(buf); - u_update_save_nr(buf); - } - - // If written to the current file, update the timestamp of the swap file - // and reset the BF_WRITE_MASK flags. Also sets buf->b_mtime. - if (overwriting) { - ml_timestamp(buf); - if (append) { - buf->b_flags &= ~BF_NEW; - } else { - buf->b_flags &= ~BF_WRITE_MASK; - } - } - - // If we kept a backup until now, and we are in patch mode, then we make - // the backup file our 'original' file. - if (*p_pm && dobackup) { - char *const org = modname(fname, p_pm, false); - - if (backup != NULL) { - // If the original file does not exist yet - // the current backup file becomes the original file - if (org == NULL) { - emsg(_("E205: Patchmode: can't save original file")); - } else if (!os_path_exists(org)) { - vim_rename(backup, org); - XFREE_CLEAR(backup); // don't delete the file -#ifdef UNIX - os_file_settime(org, - (double)file_info_old.stat.st_atim.tv_sec, - (double)file_info_old.stat.st_mtim.tv_sec); -#endif - } - } else { - // If there is no backup file, remember that a (new) file was - // created. - int empty_fd; - - if (org == NULL - || (empty_fd = os_open(org, - O_CREAT | O_EXCL | O_NOFOLLOW, - perm < 0 ? 0666 : (perm & 0777))) < 0) { - emsg(_("E206: patchmode: can't touch empty original file")); - } else { - close(empty_fd); - } - } - if (org != NULL) { - os_setperm(org, os_getperm(fname) & 0777); - xfree(org); - } - } - - // Remove the backup unless 'backup' option is set - if (!p_bk && backup != NULL - && !write_info.bw_conv_error - && os_remove(backup) != 0) { - emsg(_("E207: Can't delete backup file")); - } - - goto nofail; - - // Finish up. We get here either after failure or success. -fail: - no_wait_return--; // may wait for return now -nofail: - - // Done saving, we accept changed buffer warnings again - buf->b_saving = false; - - xfree(backup); - if (buffer != smallbuf) { - xfree(buffer); - } - xfree(fenc_tofree); - xfree(write_info.bw_conv_buf); - if (write_info.bw_iconv_fd != (iconv_t)-1) { - iconv_close(write_info.bw_iconv_fd); - write_info.bw_iconv_fd = (iconv_t)-1; - } - os_free_acl(acl); - - if (err.msg != NULL) { - // - 100 to save some space for further error message -#ifndef UNIX - add_quoted_fname(IObuff, IOSIZE - 100, buf, sfname); -#else - add_quoted_fname(IObuff, IOSIZE - 100, buf, fname); -#endif - emit_err(&err); - - retval = FAIL; - if (end == 0) { - const int attr = HL_ATTR(HLF_E); // Set highlight for error messages. - msg_puts_attr(_("\nWARNING: Original file may be lost or damaged\n"), - attr | MSG_HIST); - msg_puts_attr(_("don't quit the editor until the file is successfully written!"), - attr | MSG_HIST); - - // Update the timestamp to avoid an "overwrite changed file" - // prompt when writing again. - if (os_fileinfo(fname, &file_info_old)) { - buf_store_file_info(buf, &file_info_old); - buf->b_mtime_read = buf->b_mtime; - buf->b_mtime_read_ns = buf->b_mtime_ns; - } - } - } - msg_scroll = msg_save; - - // When writing the whole file and 'undofile' is set, also write the undo - // file. - if (retval == OK && write_undo_file) { - uint8_t hash[UNDO_HASH_SIZE]; - - sha256_finish(&sha_ctx, hash); - u_write_undo(NULL, false, buf, hash); - } - - if (!should_abort(retval)) { - buf_write_do_post_autocmds(buf, fname, eap, append, filtering, reset_changed, whole); - if (aborting()) { // autocmds may abort script processing - retval = false; - } - } - - got_int |= prev_got_int; - - return retval; -} - /// Set the name of the current buffer. Use when the buffer doesn't have a /// name and a ":r" or ":w" command with a file name is used. -static int set_rw_fname(char *fname, char *sfname) +int set_rw_fname(char *fname, char *sfname) { buf_T *buf = curbuf; @@ -3697,8 +2107,8 @@ static int set_rw_fname(char *fname, char *sfname) /// @param[in] buf_len ret_buf length. /// @param[in] buf buf_T file name is coming from. /// @param[in] fname File name to write. -static void add_quoted_fname(char *const ret_buf, const size_t buf_len, const buf_T *const buf, - const char *fname) +void add_quoted_fname(char *const ret_buf, const size_t buf_len, const buf_T *const buf, + const char *fname) FUNC_ATTR_NONNULL_ARG(1) { if (fname == NULL) { @@ -3714,7 +2124,7 @@ static void add_quoted_fname(char *const ret_buf, const size_t buf_len, const bu /// @param eol_type line ending type /// /// @return true if something was appended. -static bool msg_add_fileformat(int eol_type) +bool msg_add_fileformat(int eol_type) { #ifndef USE_CRNL if (eol_type == EOL_DOS) { @@ -3758,33 +2168,13 @@ void msg_add_lines(int insert_space, long lnum, off_T nchars) } /// Append message for missing line separator to IObuff. -static void msg_add_eol(void) +void msg_add_eol(void) { STRCAT(IObuff, shortmess(SHM_LAST) ? _("[noeol]") : _("[Incomplete last line]")); } -/// Check modification time of file, before writing to it. -/// The size isn't checked, because using a tool like "gzip" takes care of -/// using the same timestamp but can't set the size. -static int check_mtime(buf_T *buf, FileInfo *file_info) -{ - if (buf->b_mtime_read != 0 - && time_differs(file_info, buf->b_mtime_read, buf->b_mtime_read_ns)) { - msg_scroll = true; // Don't overwrite messages here. - msg_silent = 0; // Must give this prompt. - // Don't use emsg() here, don't want to flush the buffers. - msg_attr(_("WARNING: The file has been changed since reading it!!!"), - HL_ATTR(HLF_E)); - if (ask_yesno(_("Do you really want to write to it"), true) == 'n') { - return FAIL; - } - msg_scroll = false; // Always overwrite the file message now. - } - return OK; -} - -static bool time_differs(const FileInfo *file_info, long mtime, long mtime_ns) FUNC_ATTR_CONST +bool time_differs(const FileInfo *file_info, long mtime, long mtime_ns) FUNC_ATTR_CONST { #if defined(__linux__) || defined(MSWIN) return file_info->stat.st_mtim.tv_nsec != mtime_ns @@ -3799,263 +2189,13 @@ static bool time_differs(const FileInfo *file_info, long mtime, long mtime_ns) F #endif } -static int buf_write_convert_with_iconv(struct bw_info *ip, char **bufp, int *lenp) -{ - const char *from; - size_t fromlen; - size_t tolen; - - int len = *lenp; - - // Convert with iconv(). - if (ip->bw_restlen > 0) { - // Need to concatenate the remainder of the previous call and - // the bytes of the current call. Use the end of the - // conversion buffer for this. - fromlen = (size_t)len + (size_t)ip->bw_restlen; - char *fp = ip->bw_conv_buf + ip->bw_conv_buflen - fromlen; - memmove(fp, ip->bw_rest, (size_t)ip->bw_restlen); - memmove(fp + ip->bw_restlen, *bufp, (size_t)len); - from = fp; - tolen = ip->bw_conv_buflen - fromlen; - } else { - from = *bufp; - fromlen = (size_t)len; - tolen = ip->bw_conv_buflen; - } - char *to = ip->bw_conv_buf; - - if (ip->bw_first) { - size_t save_len = tolen; - - // output the initial shift state sequence - (void)iconv(ip->bw_iconv_fd, NULL, NULL, &to, &tolen); - - // There is a bug in iconv() on Linux (which appears to be - // wide-spread) which sets "to" to NULL and messes up "tolen". - if (to == NULL) { - to = ip->bw_conv_buf; - tolen = save_len; - } - ip->bw_first = false; - } - - // If iconv() has an error or there is not enough room, fail. - if ((iconv(ip->bw_iconv_fd, (void *)&from, &fromlen, &to, &tolen) - == (size_t)-1 && ICONV_ERRNO != ICONV_EINVAL) - || fromlen > CONV_RESTLEN) { - ip->bw_conv_error = true; - return FAIL; - } - - // copy remainder to ip->bw_rest[] to be used for the next call. - if (fromlen > 0) { - memmove(ip->bw_rest, (void *)from, fromlen); - } - ip->bw_restlen = (int)fromlen; - - *bufp = ip->bw_conv_buf; - *lenp = (int)(to - ip->bw_conv_buf); - - return OK; -} - -static int buf_write_convert(struct bw_info *ip, char **bufp, int *lenp) -{ - int flags = ip->bw_flags; // extra flags - - if (flags & FIO_UTF8) { - // Convert latin1 in the buffer to UTF-8 in the file. - char *p = ip->bw_conv_buf; // translate to buffer - for (int wlen = 0; wlen < *lenp; wlen++) { - p += utf_char2bytes((uint8_t)(*bufp)[wlen], p); - } - *bufp = ip->bw_conv_buf; - *lenp = (int)(p - ip->bw_conv_buf); - } else if (flags & (FIO_UCS4 | FIO_UTF16 | FIO_UCS2 | FIO_LATIN1)) { - unsigned c; - int n = 0; - // Convert UTF-8 bytes in the buffer to UCS-2, UCS-4, UTF-16 or - // Latin1 chars in the file. - // translate in-place (can only get shorter) or to buffer - char *p = flags & FIO_LATIN1 ? *bufp : ip->bw_conv_buf; - for (int wlen = 0; wlen < *lenp; wlen += n) { - if (wlen == 0 && ip->bw_restlen != 0) { - // Use remainder of previous call. Append the start of - // buf[] to get a full sequence. Might still be too - // short! - int l = MIN(*lenp, CONV_RESTLEN - ip->bw_restlen); - memmove(ip->bw_rest + ip->bw_restlen, *bufp, (size_t)l); - n = utf_ptr2len_len((char *)ip->bw_rest, ip->bw_restlen + l); - if (n > ip->bw_restlen + *lenp) { - // We have an incomplete byte sequence at the end to - // be written. We can't convert it without the - // remaining bytes. Keep them for the next call. - if (ip->bw_restlen + *lenp > CONV_RESTLEN) { - return FAIL; - } - ip->bw_restlen += *lenp; - break; - } - if (n > 1) { - c = (unsigned)utf_ptr2char((char *)ip->bw_rest); - } else { - c = ip->bw_rest[0]; - } - if (n >= ip->bw_restlen) { - n -= ip->bw_restlen; - ip->bw_restlen = 0; - } else { - ip->bw_restlen -= n; - memmove(ip->bw_rest, ip->bw_rest + n, - (size_t)ip->bw_restlen); - n = 0; - } - } else { - n = utf_ptr2len_len(*bufp + wlen, *lenp - wlen); - if (n > *lenp - wlen) { - // We have an incomplete byte sequence at the end to - // be written. We can't convert it without the - // remaining bytes. Keep them for the next call. - if (*lenp - wlen > CONV_RESTLEN) { - return FAIL; - } - ip->bw_restlen = *lenp - wlen; - memmove(ip->bw_rest, *bufp + wlen, - (size_t)ip->bw_restlen); - break; - } - if (n > 1) { - c = (unsigned)utf_ptr2char(*bufp + wlen); - } else { - c = (uint8_t)(*bufp)[wlen]; - } - } - - if (ucs2bytes(c, &p, flags) && !ip->bw_conv_error) { - ip->bw_conv_error = true; - ip->bw_conv_error_lnum = ip->bw_start_lnum; - } - if (c == NL) { - ip->bw_start_lnum++; - } - } - if (flags & FIO_LATIN1) { - *lenp = (int)(p - *bufp); - } else { - *bufp = ip->bw_conv_buf; - *lenp = (int)(p - ip->bw_conv_buf); - } - } - - if (ip->bw_iconv_fd != (iconv_t)-1) { - if (buf_write_convert_with_iconv(ip, bufp, lenp) == FAIL) { - return FAIL; - } - } - - return OK; -} - -/// Call write() to write a number of bytes to the file. -/// Handles 'encoding' conversion. -/// -/// @return FAIL for failure, OK otherwise. -static int buf_write_bytes(struct bw_info *ip) -{ - char *buf = ip->bw_buf; // data to write - int len = ip->bw_len; // length of data - int flags = ip->bw_flags; // extra flags - - // Skip conversion when writing the BOM. - if (!(flags & FIO_NOCONVERT)) { - if (buf_write_convert(ip, &buf, &len) == FAIL) { - return FAIL; - } - } - - if (ip->bw_fd < 0) { - // Only checking conversion, which is OK if we get here. - return OK; - } - int wlen = (int)write_eintr(ip->bw_fd, buf, (size_t)len); - return (wlen < len) ? FAIL : OK; -} - -/// Convert a Unicode character to bytes. -/// -/// @param c character to convert -/// @param[in,out] pp pointer to store the result at -/// @param flags FIO_ flags that specify which encoding to use -/// -/// @return true for an error, false when it's OK. -static bool ucs2bytes(unsigned c, char **pp, int flags) - FUNC_ATTR_NONNULL_ALL -{ - uint8_t *p = (uint8_t *)(*pp); - bool error = false; - - if (flags & FIO_UCS4) { - if (flags & FIO_ENDIAN_L) { - *p++ = (uint8_t)c; - *p++ = (uint8_t)(c >> 8); - *p++ = (uint8_t)(c >> 16); - *p++ = (uint8_t)(c >> 24); - } else { - *p++ = (uint8_t)(c >> 24); - *p++ = (uint8_t)(c >> 16); - *p++ = (uint8_t)(c >> 8); - *p++ = (uint8_t)c; - } - } else if (flags & (FIO_UCS2 | FIO_UTF16)) { - if (c >= 0x10000) { - if (flags & FIO_UTF16) { - // Make two words, ten bits of the character in each. First - // word is 0xd800 - 0xdbff, second one 0xdc00 - 0xdfff - c -= 0x10000; - if (c >= 0x100000) { - error = true; - } - int cc = (int)(((c >> 10) & 0x3ff) + 0xd800); - if (flags & FIO_ENDIAN_L) { - *p++ = (uint8_t)cc; - *p++ = (uint8_t)(cc >> 8); - } else { - *p++ = (uint8_t)(cc >> 8); - *p++ = (uint8_t)cc; - } - c = (c & 0x3ff) + 0xdc00; - } else { - error = true; - } - } - if (flags & FIO_ENDIAN_L) { - *p++ = (uint8_t)c; - *p++ = (uint8_t)(c >> 8); - } else { - *p++ = (uint8_t)(c >> 8); - *p++ = (uint8_t)c; - } - } else { // Latin1 - if (c >= 0x100) { - error = true; - *p++ = 0xBF; - } else { - *p++ = (uint8_t)c; - } - } - - *pp = (char *)p; - return error; -} - /// Return true if file encoding "fenc" requires conversion from or to /// 'encoding'. /// /// @param fenc file encoding to check /// /// @return true if conversion is required -static bool need_conversion(const char *fenc) +bool need_conversion(const char *fenc) FUNC_ATTR_NONNULL_ALL FUNC_ATTR_WARN_UNUSED_RESULT { int same_encoding; @@ -4086,7 +2226,7 @@ static bool need_conversion(const char *fenc) /// use 'encoding'. /// /// @param name string to check for encoding -static int get_fio_flags(const char *name) +int get_fio_flags(const char *name) { if (*name == NUL) { name = p_enc; @@ -4166,30 +2306,6 @@ static char *check_for_bom(const char *p_in, int size, int *lenp, int flags) return name; } -/// Generate a BOM in "buf[4]" for encoding "name". -/// -/// @return the length of the BOM (zero when no BOM). -static int make_bom(char *buf_in, char *name) -{ - uint8_t *buf = (uint8_t *)buf_in; - int flags = get_fio_flags(name); - - // Can't put a BOM in a non-Unicode file. - if (flags == FIO_LATIN1 || flags == 0) { - return 0; - } - - if (flags == FIO_UTF8) { // UTF-8 - buf[0] = 0xef; - buf[1] = 0xbb; - buf[2] = 0xbf; - return 3; - } - char *p = (char *)buf; - (void)ucs2bytes(0xfeff, &p, flags); - return (int)((uint8_t *)p - buf); -} - /// Shorten filename of a buffer. /// /// @param force when true: Use full path from now on for files currently being @@ -4600,7 +2716,7 @@ int vim_rename(const char *from, const char *to) // Avoid xmalloc() here as vim_rename() is called by buf_write() when nvim // is `preserve_exit()`ing. - char *buffer = try_malloc(BUFSIZE); + char *buffer = try_malloc(WRITEBUFSIZE); if (buffer == NULL) { close(fd_out); close(fd_in); @@ -4609,7 +2725,7 @@ int vim_rename(const char *from, const char *to) } int n; - while ((n = (int)read_eintr(fd_in, buffer, BUFSIZE)) > 0) { + while ((n = (int)read_eintr(fd_in, buffer, WRITEBUFSIZE)) > 0) { if (write_eintr(fd_out, buffer, (size_t)n) != n) { errmsg = _("E208: Error writing to \"%s\""); break; @@ -5368,7 +3484,7 @@ char *vim_gettempdir(void) static int notfound = 0; bool exists = false; if (vim_tempdir == NULL || !(exists = os_isdir(vim_tempdir))) { - if (vim_tempdir != NULL && !exists) { + if (vim_tempdir != NULL) { notfound++; if (notfound == 1) { ELOG("tempdir disappeared (antivirus or broken cleanup job?): %s", vim_tempdir); |