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author | rgrimes <rgrimes@FreeBSD.org> | 1994-05-27 12:33:43 +0000 |
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committer | rgrimes <rgrimes@FreeBSD.org> | 1994-05-27 12:33:43 +0000 |
commit | f9ab90d9d6d02989a075d0f0074496d5b1045e4b (patch) | |
tree | add7e996bac5289cdc55e6935750c352505560a9 /usr.bin/window/wwspawn.c | |
parent | be22b15ae2ff8d7fe06b6e14fddf0c5b444a95da (diff) | |
download | FreeBSD-src-f9ab90d9d6d02989a075d0f0074496d5b1045e4b.zip FreeBSD-src-f9ab90d9d6d02989a075d0f0074496d5b1045e4b.tar.gz |
BSD 4.4 Lite Usr.bin Sources
Diffstat (limited to 'usr.bin/window/wwspawn.c')
-rw-r--r-- | usr.bin/window/wwspawn.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/usr.bin/window/wwspawn.c b/usr.bin/window/wwspawn.c new file mode 100644 index 0000000..7c3c12b --- /dev/null +++ b/usr.bin/window/wwspawn.c @@ -0,0 +1,85 @@ +/* + * Copyright (c) 1983, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Edward Wang at The University of California, Berkeley. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)wwspawn.c 8.1 (Berkeley) 6/6/93"; +#endif /* not lint */ + +#include "ww.h" +#include <sys/signal.h> + +/* + * There is a dead lock with vfork and closing of pseudo-ports. + * So we have to be sneaky about error reporting. + */ +wwspawn(wp, file, argv) +register struct ww *wp; +char *file; +char **argv; +{ + int pid; + int ret; + char erred = 0; + int s; + + s = sigblock(sigmask(SIGCHLD)); + switch (pid = vfork()) { + case -1: + wwerrno = WWE_SYS; + ret = -1; + break; + case 0: + if (wwenviron(wp) >= 0) + execvp(file, argv); + erred = 1; + _exit(1); + default: + if (erred) { + wwerrno = WWE_SYS; + ret = -1; + } else { + wp->ww_pid = pid; + wp->ww_state = WWS_HASPROC; + ret = pid; + } + } + (void) sigsetmask(s); + if (wp->ww_socket >= 0) { + (void) close(wp->ww_socket); + wp->ww_socket = -1; + } + return ret; +} |