mirror of
https://github.com/slicer69/doas
synced 2024-09-06 16:35:54 +00:00
90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
/*
|
|
* Copyright (c) 2004-2005, 2007, 2010, 2012-2014
|
|
* Todd C. Miller <Todd.Miller@courtesan.com>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
/* closefrom.c original: libbsd/src/closefrom.c */
|
|
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <limits.h>
|
|
#include <dirent.h>
|
|
|
|
static inline void
|
|
closefrom_close(int fd)
|
|
{
|
|
#ifdef __APPLE__
|
|
/* Avoid potential libdispatch crash when we close its fds. */
|
|
(void)fcntl(fd, F_SETFD, FD_CLOEXEC);
|
|
#else
|
|
(void)close(fd);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
closefrom(int lowfd)
|
|
{
|
|
const char *path;
|
|
DIR *dirp;
|
|
struct dirent *dent;
|
|
int *fd_array = NULL;
|
|
int fd_array_used = 0;
|
|
int fd_array_size = 0;
|
|
int i;
|
|
|
|
/* Use /proc/self/fd (or /dev/fd on FreeBSD) if it exists. */
|
|
# if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__APPLE__)
|
|
path = "/dev/fd";
|
|
# else
|
|
path = "/proc/self/fd";
|
|
# endif
|
|
dirp = opendir(path);
|
|
if (dirp == NULL)
|
|
return;
|
|
|
|
while ((dent = readdir(dirp)) != NULL) {
|
|
const char *errstr;
|
|
int fd;
|
|
|
|
fd = strtonum(dent->d_name, lowfd, INT_MAX, &errstr);
|
|
if (errstr != NULL || fd == dirfd(dirp))
|
|
continue;
|
|
|
|
if (fd_array_used >= fd_array_size) {
|
|
int *ptr;
|
|
|
|
if (fd_array_size > 0)
|
|
fd_array_size *= 2;
|
|
else
|
|
fd_array_size = 32;
|
|
|
|
ptr = reallocarray(fd_array, fd_array_size, sizeof(int));
|
|
if (ptr == NULL) {
|
|
break;
|
|
}
|
|
fd_array = ptr;
|
|
}
|
|
|
|
fd_array[fd_array_used++] = fd;
|
|
}
|
|
|
|
for (i = 0; i < fd_array_used; i++)
|
|
closefrom_close(fd_array[i]);
|
|
|
|
free(fd_array);
|
|
(void)closedir(dirp);
|
|
}
|