TODO: "exepath" field (win32: QueryFullProcessImageName())
On unix-likes `ps` is used because the platform-specific APIs are
a nightmare. For reference, below is a (incomplete) attempt:
diff --git a/src/nvim/os/process.c b/src/nvim/os/process.c
index 09769925aca5..99afbbf290c1 100644
--- a/src/nvim/os/process.c
+++ b/src/nvim/os/process.c
@@ -208,3 +210,60 @@ int os_proc_children(int ppid, int **proc_list, size_t *proc_count)
return 0;
}
+/// Gets various properties of the process identified by `pid`.
+///
+/// @param pid Process to inspect.
+/// @return Map of process properties, empty on error.
+Dictionary os_proc_info(int pid)
+{
+ Dictionary pinfo = ARRAY_DICT_INIT;
+#ifdef WIN32
+
+#elif defined(__APPLE__)
+ char buf[PROC_PIDPATHINFO_MAXSIZE];
+ if (proc_pidpath(pid, buf, sizeof(buf))) {
+ name = getName(buf);
+ PUT(pinfo, "exepath", STRING_OBJ(cstr_to_string(buf)));
+ return name;
+ } else {
+ ILOG("proc_pidpath() failed for pid: %d", pid);
+ }
+#elif defined(BSD)
+# if defined(__FreeBSD__)
+# define KP_COMM(o) o.ki_comm
+# else
+# define KP_COMM(o) o.p_comm
+# endif
+ struct kinfo_proc *proc = kinfo_getproc(pid);
+ if (proc) {
+ PUT(pinfo, "name", cstr_to_string(KP_COMM(proc)));
+ xfree(proc);
+ } else {
+ ILOG("kinfo_getproc() failed for pid: %d", pid);
+ }
+
+#elif defined(__linux__)
+ char fname[256] = { 0 };
+ char buf[MAXPATHL];
+ snprintf(fname, sizeof(fname), "/proc/%d/comm", pid);
+ FILE *fp = fopen(fname, "r");
+ // FileDescriptor *f = file_open_new(&error, fname, kFileReadOnly, 0);
+ // ptrdiff_t file_read(FileDescriptor *const fp, char *const ret_buf,
+ // const size_t size)
+ if (fp == NULL) {
+ ILOG("fopen() of /proc/%d/comm failed", pid);
+ } else {
+ size_t n = fread(buf, sizeof(char), sizeof(buf) - 1, fp);
+ if (n == 0) {
+ WLOG("fread() of /proc/%d/comm failed", pid);
+ } else {
+ size_t end = MIN(sizeof(buf) - 1, n);
+ end = (end > 0 && buf[end - 1] == '\n') ? end - 1 : end;
+ buf[end] = '\0';
+ PUT(pinfo, "name", STRING_OBJ(cstr_to_string(buf)));
+ }
+ }
+ fclose(fp);
+#endif
+ return pinfo;
+}