sbase/libutil/recurse.c
FRIGN af61ba738c Refactor recurse()
Instead of allocating a buffer on each run, build a buf on the stack.
2015-03-12 13:22:37 +01:00

60 lines
1.5 KiB
C

/* See LICENSE file for copyright and license details. */
#include <dirent.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "../util.h"
int recurse_follow = 'P';
int recurse_samedev = 0;
void
recurse(const char *path, void (*fn)(const char *, int, void *), int depth, void *data)
{
struct dirent *d;
struct stat lst, st, dst;
DIR *dp;
char subpath[PATH_MAX];
if (lstat(path, &lst) < 0) {
if (errno != ENOENT)
weprintf("lstat %s:", path);
return;
}
if (stat(path, &st) < 0) {
if (errno != ENOENT)
weprintf("stat %s:", path);
return;
}
if (!S_ISDIR(lst.st_mode) && !(S_ISLNK(lst.st_mode) && S_ISDIR(st.st_mode) &&
!(recurse_follow == 'P' || (recurse_follow == 'H' && depth > 0))))
return;
if (!(dp = opendir(path)))
eprintf("opendir %s:", path);
while ((d = readdir(dp))) {
if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
continue;
if (strlcpy(subpath, path, PATH_MAX) >= PATH_MAX)
eprintf("strlcpy: path too long\n");
if (path[strlen(path) - 1] != '/' && strlcat(subpath, "/", PATH_MAX) >= PATH_MAX)
eprintf("strlcat: path too long\n");
if (strlcat(subpath, d->d_name, PATH_MAX) >= PATH_MAX)
eprintf("strlcat: path too long\n");
if (recurse_samedev && lstat(subpath, &dst) < 0) {
if (errno != ENOENT)
weprintf("stat %s:", subpath);
} else if (!(recurse_samedev && dst.st_dev != lst.st_dev))
fn(subpath, depth + 1, data);
}
closedir(dp);
}