diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/libstrongswan/utils.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/src/libstrongswan/utils.c b/src/libstrongswan/utils.c index eca613a5d..7ad948f70 100644 --- a/src/libstrongswan/utils.c +++ b/src/libstrongswan/utils.c @@ -28,6 +28,7 @@ #include "enum.h" #include "debug.h" +#include "utils/enumerator.h" ENUM(status_names, SUCCESS, NEED_MORE, "SUCCESS", @@ -199,7 +200,31 @@ bool mkdir_p(const char *path, mode_t mode) */ void closefrom(int lowfd) { - int maxfd, fd; + char fd_dir[PATH_MAX]; + int maxfd, fd, len; + + /* try to close only open file descriptors on Linux... */ + len = snprintf(fd_dir, sizeof(fd_dir), "/proc/%u/fd", getpid()); + if (len > 0 && len < sizeof(fd_dir)) + { + enumerator_t *enumerator = enumerator_create_directory(fd_dir); + if (enumerator) + { + char *rel, *end; + while (enumerator->enumerate(enumerator, &rel, NULL, NULL)) + { + fd = atoi(rel); + if (fd >= lowfd) + { + close(fd); + } + } + enumerator->destroy(enumerator); + return; + } + } + + /* ...fall back to closing all fds otherwise */ maxfd = (int)sysconf(_SC_OPEN_MAX); if (maxfd < 0) { |