diff options
Diffstat (limited to 'lib/backup-files.c')
| -rw-r--r-- | lib/backup-files.c | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/lib/backup-files.c b/lib/backup-files.c index c7b704f..ea20a5b 100644 --- a/lib/backup-files.c +++ b/lib/backup-files.c @@ -46,6 +46,10 @@ # define mkstemp(x) creat(mktemp(x), 0600) #endif +#ifndef PATH_MAX +# define PATH_MAX 4095 +#endif + const char *progname; enum { what_noop, what_backup, what_restore, what_remove }; @@ -60,7 +64,7 @@ int opt_nolinks, opt_touch; static void usage(void) { - printf("Usage: %s [-B prefix] [-z suffix] [-f {file|-}] [-s] [-b|-r|-x] [-L] {file|-} ...\n" + printf("Usage: %s [-B prefix] [-z suffix] [-f {file|-}] [-s] [-b|-r|-x] [-t] [-L] {file|-} ...\n" "\n" "\tCreate hard linked backup copies of a list of files\n" "\tread from standard input.\n" @@ -71,10 +75,8 @@ usage(void) "\t-B\tPath name prefix for backup files\n" "\t-z\tPath name suffix for backup files\n" "\t-s\tSilent operation; only print error messages\n" - "\t-L\tEnsure that when finished, the source file has a link count of 1\n" "\t-f\tRead the filenames to process from file (- = standard input)\n" "\t-t\tTouch original files after restore (update their mtimes)\n\n" - "\t-L\tEnsure that when finished, the source file has a link count of 1\n\n", progname); } @@ -381,22 +383,24 @@ foreachdir_rec(const char *path, struct stat *st, { DIR *dir; struct dirent *dp; - char *p = NULL; int failed = 0; + char *p = malloc_nofail(sizeof(char) * (PATH_MAX + 1)); if (access(path, R_OK|X_OK) || !(dir = opendir(path))) return walk(path, NULL); while ((dp = readdir(dir))) { - char *p0 = p; + int len; if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) continue; - if (!(p = realloc(p, strlen(path) + 1 + - strlen(dp->d_name) + 1))) { - free(p0); - return -1; + len = snprintf(p, PATH_MAX + 1, "%s/%s", path, dp->d_name); + if (len > PATH_MAX || len < 0) { + fprintf(stderr, "%s/%s: name too long\n", path, + dp->d_name); + failed = -1; + goto out; } - sprintf(p, "%s/%s", path, dp->d_name); + if (lstat(p, st)) continue; /* file has disappeared meanwhile */ if (S_ISDIR(st->st_mode)) { |