getchar: Use fileio instead of fdopen

Problem: as fileio is cached and reads blocks this is going to wait
until either EOF or reading enough characters to fill rbuffer. This is
not good when reading user input from stdin as script.

1 files changed, 10 insertions, 4 deletions

diff --git a/src/nvim/main.c b/src/nvim/main.c
index ce0426bd8e..da3ec4381e 100644
--- a/src/nvim/main.c
+++ b/src/nvim/main.c
@@ -1056,14 +1056,20 @@ scripterror:
               mch_errmsg("\"\n");
               mch_exit(2);
             }
+            int error;
             if (STRCMP(argv[0], "-") == 0) {
-              const int stdin_dup_fd = os_dup(STDIN_FILENO);
-              FILE *const stdin_dup = fdopen(stdin_dup_fd, "r");
+              const int stdin_dup_fd = os_dup(OS_STDIN_FILENO);
+              FileDescriptor *const stdin_dup = file_open_fd_new(
+                  &error, stdin_dup_fd, false, 0);
+              assert(stdin_dup != NULL);
               scriptin[0] = stdin_dup;
-            } else if ((scriptin[0] = mch_fopen(argv[0], READBIN)) == NULL) {
+            } else if ((scriptin[0] = file_open_new(
+                &error, argv[0], kFileReadOnly, 0)) == NULL) {
               mch_errmsg(_("Cannot open for reading: \""));
               mch_errmsg(argv[0]);
-              mch_errmsg("\"\n");
+              mch_errmsg("\": ");
+              mch_errmsg(os_strerror(error));
+              mch_errmsg("\n");
               mch_exit(2);
             }
             save_typebuf();