diff options
Diffstat (limited to 'lib/libc/gen/daemon.c')
| -rw-r--r-- | lib/libc/gen/daemon.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/lib/libc/gen/daemon.c b/lib/libc/gen/daemon.c index 315b827..0158976 100644 --- a/lib/libc/gen/daemon.c +++ b/lib/libc/gen/daemon.c @@ -38,8 +38,10 @@ static char sccsid[] = "@(#)daemon.c 8.1 (Berkeley) 6/4/93"; __FBSDID("$FreeBSD$"); #include "namespace.h" +#include <errno.h> #include <fcntl.h> #include <paths.h> +#include <signal.h> #include <unistd.h> #include "un-namespace.h" @@ -47,7 +49,17 @@ int daemon(nochdir, noclose) int nochdir, noclose; { + struct sigaction osa, sa; int fd; + pid_t newgrp; + int oerrno; + int osa_ok; + + /* A SIGHUP may be thrown when the parent exits below. */ + sigemptyset(&sa.sa_mask); + sa.sa_handler = SIG_IGN; + sa.sa_flags = 0; + osa_ok = _sigaction(SIGHUP, &sa, &osa); switch (fork()) { case -1: @@ -58,8 +70,15 @@ daemon(nochdir, noclose) _exit(0); } - if (setsid() == -1) + newgrp = setsid(); + oerrno = errno; + if (osa_ok != -1) + _sigaction(SIGHUP, &osa, NULL); + + if (newgrp == -1) { + errno = oerrno; return (-1); + } if (!nochdir) (void)chdir("/"); |
