diff options
Diffstat (limited to 'tools/perf/util/trace-event-info.c')
| -rw-r--r-- | tools/perf/util/trace-event-info.c | 50 |
1 files changed, 23 insertions, 27 deletions
diff --git a/tools/perf/util/trace-event-info.c b/tools/perf/util/trace-event-info.c index cace3559553..dfef238ce15 100644 --- a/tools/perf/util/trace-event-info.c +++ b/tools/perf/util/trace-event-info.c @@ -20,6 +20,7 @@ */ #define _GNU_SOURCE #include <dirent.h> +#include <mntent.h> #include <stdio.h> #include <stdlib.h> #include <string.h> @@ -103,28 +104,28 @@ static const char *find_debugfs(void) { static char debugfs[MAX_PATH+1]; static int debugfs_found; - char type[100]; FILE *fp; + struct mntent *m; if (debugfs_found) return debugfs; - if ((fp = fopen("/proc/mounts","r")) == NULL) + fp = setmntent("/proc/mounts", "r"); + if (!fp) die("Can't open /proc/mounts for read"); - while (fscanf(fp, "%*s %" - STR(MAX_PATH) - "s %99s %*s %*d %*d\n", - debugfs, type) == 2) { - if (strcmp(type, "debugfs") == 0) + while ((m = getmntent(fp)) != NULL) { + if (strcmp(m->mnt_type, "debugfs") == 0) { + strcpy(debugfs, m->mnt_dir); + debugfs_found = 1; break; + } } - fclose(fp); - if (strcmp(type, "debugfs") != 0) - die("debugfs not mounted, please mount"); + endmntent(fp); - debugfs_found = 1; + if (!debugfs_found) + die("debugfs not mounted, please mount"); return debugfs; } @@ -317,7 +318,8 @@ static void copy_event_system(const char *sys, struct tracepoint_path *tps) die("can't read directory '%s'", sys); while ((dent = readdir(dir))) { - if (strcmp(dent->d_name, ".") == 0 || + if (dent->d_type != DT_DIR || + strcmp(dent->d_name, ".") == 0 || strcmp(dent->d_name, "..") == 0 || !name_in_tp_list(dent->d_name, tps)) continue; @@ -334,7 +336,8 @@ static void copy_event_system(const char *sys, struct tracepoint_path *tps) rewinddir(dir); while ((dent = readdir(dir))) { - if (strcmp(dent->d_name, ".") == 0 || + if (dent->d_type != DT_DIR || + strcmp(dent->d_name, ".") == 0 || strcmp(dent->d_name, "..") == 0 || !name_in_tp_list(dent->d_name, tps)) continue; @@ -394,26 +397,21 @@ static void read_event_files(struct tracepoint_path *tps) die("can't read directory '%s'", path); while ((dent = readdir(dir))) { - if (strcmp(dent->d_name, ".") == 0 || + if (dent->d_type != DT_DIR || + strcmp(dent->d_name, ".") == 0 || strcmp(dent->d_name, "..") == 0 || strcmp(dent->d_name, "ftrace") == 0 || !system_in_tp_list(dent->d_name, tps)) continue; - sys = malloc_or_die(strlen(path) + strlen(dent->d_name) + 2); - sprintf(sys, "%s/%s", path, dent->d_name); - ret = stat(sys, &st); - free(sys); - if (ret < 0) - continue; - if (S_ISDIR(st.st_mode)) - count++; + count++; } write_or_die(&count, 4); rewinddir(dir); while ((dent = readdir(dir))) { - if (strcmp(dent->d_name, ".") == 0 || + if (dent->d_type != DT_DIR || + strcmp(dent->d_name, ".") == 0 || strcmp(dent->d_name, "..") == 0 || strcmp(dent->d_name, "ftrace") == 0 || !system_in_tp_list(dent->d_name, tps)) @@ -422,10 +420,8 @@ static void read_event_files(struct tracepoint_path *tps) sprintf(sys, "%s/%s", path, dent->d_name); ret = stat(sys, &st); if (ret >= 0) { - if (S_ISDIR(st.st_mode)) { - write_or_die(dent->d_name, strlen(dent->d_name) + 1); - copy_event_system(sys, tps); - } + write_or_die(dent->d_name, strlen(dent->d_name) + 1); + copy_event_system(sys, tps); } free(sys); } |