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/***********************************************************************
*
* rm_r.c
*
* Implementation in C of recursive deletion of directory (rm -r dir)
*
* Copyright (C) 2002-2005 Roaring Penguin Software Inc.
* http://www.roaringpenguin.com
*
* This program may be distributed under the terms of the GNU General
* Public License, Version 2, or (at your option) any later version.
*
***********************************************************************/
#include "config.h"
#include "mimedefang.h"
#include <sys/stat.h>
#include <unistd.h>
#include <sys/types.h>
#include <dirent.h>
#include <errno.h>
#include <syslog.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#ifdef EXEC_RM_FOR_CLEANUP
#include <sys/wait.h>
#endif
#ifdef ENABLE_DEBUGGING
extern void *malloc_debug(void *, size_t, char const *fname, int);
extern char *strdup_debug(void *, char const *, char const *, int);
extern void free_debug(void *, void *, char const *, int);
#undef malloc
#undef strdup
#undef free
#define malloc(x) malloc_debug(ctx, x, __FILE__, __LINE__)
#define strdup(x) strdup_debug(ctx, x, __FILE__, __LINE__)
#define free(x) free_debug(ctx, x, __FILE__, __LINE__)
#define malloc_with_log(x) malloc_debug(ctx, x, __FILE__, __LINE__)
#define strdup_with_log(x) strdup_debug(ctx, x, __FILE__, __LINE__)
#endif
#ifndef EXEC_RM_FOR_CLEANUP
/**********************************************************************
* %FUNCTION: rm_r
* %ARGUMENTS:
* dir -- directory or file name
* %RETURNS:
* -1 on error, 0 otherwise.
* %DESCRIPTION:
* Deletes dir and recursively deletes contents
***********************************************************************/
int
rm_r(char const *qid, char const *dir)
{
char buf[SMALLBUF];
struct stat sbuf;
DIR *d;
struct dirent *entry;
struct dirent *result = NULL;
int n;
int retcode = 0;
if (!qid || !*qid) {
qid = "NOQUEUE";
}
if (lstat(dir, &sbuf) < 0) {
syslog(LOG_WARNING, "%s: lstat(%s) failed: %m", qid, dir);
return -1;
}
if (!S_ISDIR(sbuf.st_mode)) {
/* Not a directory - just unlink */
if (unlink(dir) < 0) {
syslog(LOG_WARNING, "%s: unlink(%s) failed: %m", qid, dir);
return -1;
}
return 0;
}
/* Allocate room for entry */
#ifdef HAVE_PATHCONF
entry = (struct dirent *) malloc(sizeof(struct dirent) + pathconf(dir, _PC_NAME_MAX) + 1);
#else
/* Can't use _POSIX_NAME_MAX because it's often defined as 14...
useless... */
entry = (struct dirent *) malloc(sizeof(struct dirent) + 257);
#endif
if (!entry) {
syslog(LOG_WARNING, "%s: Unable to allocate space for dirent entry: %m", qid);
return -1;
}
d = opendir(dir);
if (!d) {
int errno_save = errno;
syslog(LOG_WARNING, "%s: opendir(%s) failed: %m", qid, dir);
free(entry);
errno = errno_save;
return -1;
}
for (;;) {
n = readdir_r(d, entry, &result);
if (n != 0) {
errno = n;
syslog(LOG_WARNING, "%s: readdir_r failed: %m", qid);
closedir(d);
free(entry);
errno = n;
return -1;
}
if (!result) break;
if (!strcmp(entry->d_name, ".") ||
!strcmp(entry->d_name, "..")) {
continue;
}
snprintf(buf, sizeof(buf), "%s/%s", dir, entry->d_name);
if (rm_r(qid, buf) < 0) {
retcode = -1;
}
}
free(entry);
closedir(d);
if (rmdir(dir) < 0) {
syslog(LOG_WARNING, "%s: rmdir(%s) failed: %m", qid, dir);
return -1;
}
return retcode;
}
#else /* EXEC_RM_FOR_CLEANUP */
/**********************************************************************
* %FUNCTION: rm_r
* %ARGUMENTS:
* dir -- directory or file name
* %RETURNS:
* -1 on error, 0 otherwise.
* %DESCRIPTION:
* Deletes dir and recursively deletes contents. Does so by forking and
* exec'ing "rm".
***********************************************************************/
int
rm_r(char const *qid, char const *dir)
{
pid_t pid;
if (!qid || !*qid) {
qid = "NOQUEUE";
}
pid = fork();
if (pid == (pid_t) -1) {
syslog(LOG_WARNING, "%s: fork() failed -- cannot clean up: %m", qid);
return -1;
}
if (pid == 0) {
/* In the child */
execl(RM, "rm", "-r", "-f", dir, NULL);
_exit(EXIT_FAILURE);
}
/* In the parent */
if (waitpid(pid, NULL, 0) < 0) {
syslog(LOG_ERR, "%s: waitpid() failed -- cannot clean up: %m", qid);
return -1;
}
return 0;
}
#endif /* EXEC_RM_FOR_CLEANUP */
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