mirror of
https://gitlab.com/apparmor/apparmor.git
synced 2025-03-04 08:24:42 +01:00
c0b5035b1a
The apparmor_parser has 3 different directory walking routines. Abstract them out and use a single common routine. Signed-off-by: John Johansen <john.johansen@canonical.com> Acked-By: Steve Beattie <sbeattie@ubuntu.com>
135 lines
3.4 KiB
C
135 lines
3.4 KiB
C
/*
|
|
* Copyright (c) 2012
|
|
* Canonical Ltd. (All rights reserved)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of version 2 of the GNU General Public
|
|
* License published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, contact Novell, Inc. or Canonical,
|
|
* Ltd.
|
|
*/
|
|
|
|
#include <dirent.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stddef.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#define _(s) gettext(s)
|
|
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
|
|
#include "parser.h"
|
|
|
|
/**
|
|
* dirat_for_each: iterate over a directory calling cb for each entry
|
|
* @dir: already opened directory (MAY BE NULL)
|
|
* @name: name of the directory (MAY BE NULL)
|
|
* @data: data pointer to pass to the callback fn (MAY BE NULL)
|
|
* @cb: the callback to pass entry too (NOT NULL)
|
|
*
|
|
* Iterate over the entries in a directory calling cb for each entry.
|
|
* The directory to iterate is determined by a combination of @dir and
|
|
* @name.
|
|
*
|
|
* IF @name is a relative path it is determine relative to at @dir if it
|
|
* is specified, else it the lookup is done relative to the current
|
|
* working directory.
|
|
*
|
|
* If @name is not specified then @dir is used as the directory to iterate
|
|
* over.
|
|
*
|
|
* It is an error if both @name and @dir are null
|
|
*
|
|
* The cb function is called with the DIR in use and the name of the
|
|
* file in that directory. If the file is to be opened it should
|
|
* use the openat, fstatat, and related fns.
|
|
*
|
|
* Returns: 0 on success, else -1 and errno is set to the error code
|
|
*/
|
|
int dirat_for_each(DIR *dir, const char *name, void *data,
|
|
int (* cb)(DIR *, const char *, struct stat *, void *))
|
|
{
|
|
struct dirent *dirent = NULL, *ent;
|
|
DIR *d = NULL;
|
|
int error = 0;
|
|
|
|
if (!cb || (!dir && !name)) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
if (dir && (!name || *name != '/')) {
|
|
dirent = malloc(offsetof(struct dirent, d_name) +
|
|
fpathconf(dirfd(dir), _PC_NAME_MAX) + 1);
|
|
} else {
|
|
dirent = malloc(offsetof(struct dirent, d_name) +
|
|
pathconf(name, _PC_NAME_MAX) + 1);
|
|
}
|
|
if (!dirent) {
|
|
PDEBUG("could not alloc dirent");
|
|
return -1;
|
|
}
|
|
|
|
if (name) {
|
|
if (dir && *name != '/') {
|
|
int fd = openat(dirfd(dir), name, O_RDONLY);
|
|
if (fd == -1)
|
|
goto fail;
|
|
d = fdopendir(fd);
|
|
} else {
|
|
d = opendir(name);
|
|
}
|
|
PDEBUG("Open dir '%s': %s\n", name, d ? "succeeded" : "failed");
|
|
if (!(d))
|
|
goto fail;
|
|
} else { /* dir && !name */
|
|
PDEBUG("Recieved cache directory\n");
|
|
d = dir;
|
|
}
|
|
|
|
for (error = readdir_r(d, dirent, &ent);
|
|
error == 0 && ent != NULL;
|
|
error = readdir_r(d, dirent, &ent)) {
|
|
struct stat my_stat;
|
|
|
|
if (strcmp(ent->d_name, ".") == 0 ||
|
|
strcmp(ent->d_name, "..") == 0)
|
|
continue;
|
|
|
|
if (fstatat(dirfd(d), ent->d_name, &my_stat, 0)) {
|
|
PDEBUG("stat failed for '%s'", name);
|
|
goto fail;
|
|
}
|
|
|
|
if (cb(d, ent->d_name, &my_stat, data)) {
|
|
PDEBUG("dir_for_each callback failed\n");
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
if (d != dir)
|
|
closedir(d);
|
|
free(dirent);
|
|
|
|
return error;
|
|
|
|
fail:
|
|
error = errno;
|
|
if (d && d != dir)
|
|
closedir(d);
|
|
free(dirent);
|
|
errno = error;
|
|
|
|
return -1;
|
|
}
|