diff options
Diffstat (limited to 'libbb')
| -rw-r--r-- | libbb/xfuncs.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/libbb/xfuncs.c b/libbb/xfuncs.c index 2075379..6a6bdce 100644 --- a/libbb/xfuncs.c +++ b/libbb/xfuncs.c @@ -509,6 +509,30 @@ void xdaemon(int nochdir, int noclose) } #endif +void bb_sanitize_stdio(int daemonize) +{ + int fd; + /* Mega-paranoid */ + fd = xopen(bb_dev_null, O_RDWR); + while (fd < 2) + fd = dup(fd); /* have 0,1,2 open at least to /dev/null */ + if (daemonize) { + pid_t pid = fork(); + if (pid < 0) /* wtf? */ + bb_perror_msg_and_die("fork"); + if (pid) /* parent */ + exit(0); + /* child */ + setsid(); + /* if daemonizing, make sure we detach from stdio */ + dup2(fd, 0); + dup2(fd, 1); + dup2(fd, 2); + } + while (fd > 2) + close(fd--); /* close everything after fd#2 */ +} + // Die with an error message if we can't open a new socket. int xsocket(int domain, int type, int protocol) { |