/[cmucl]/src/lisp/runprog.c
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Contents of /src/lisp/runprog.c

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Revision 1.7 - (show annotations)
Thu Sep 15 18:26:52 2005 UTC (8 years, 7 months ago) by rtoy
Branch: MAIN
CVS Tags: sparc-tramp-assem-base, double-double-array-base, post-merge-intl-branch, merged-unicode-utf16-extfmt-2009-06-11, double-double-init-sparc-2, unicode-utf16-extfmt-2009-03-27, double-double-base, snapshot-2007-09, snapshot-2007-08, snapshot-2008-08, snapshot-2008-09, sse2-packed-2008-11-12, snapshot-2008-05, snapshot-2008-06, snapshot-2008-07, snapshot-2007-05, snapshot-2008-01, snapshot-2008-02, snapshot-2008-03, intl-branch-working-2010-02-19-1000, snapshot-2006-11, snapshot-2006-10, double-double-init-sparc, snapshot-2006-12, unicode-string-buffer-impl-base, sse2-base, release-20b-pre1, release-20b-pre2, unicode-string-buffer-base, sse2-packed-base, sparc-tramp-assem-2010-07-19, amd64-dd-start, release-19f-pre1, snapshot-2008-12, snapshot-2008-11, intl-2-branch-base, snapshot-2007-01, snapshot-2007-02, release-19e, release-19d, GIT-CONVERSION, double-double-init-ppc, release-19c, unicode-utf16-sync-2008-12, release-19c-base, cross-sol-x86-merged, label-2009-03-16, release-19f-base, merge-sse2-packed, merge-with-19f, intl-branch-working-2010-02-11-1000, unicode-snapshot-2009-05, unicode-snapshot-2009-06, double-double-init-%make-sparc, unicode-utf16-sync-2008-07, unicode-utf16-sync-2008-09, unicode-utf16-extfmts-sync-2008-12, RELEASE_20b, snapshot-2008-04, unicode-utf16-sync-label-2009-03-16, RELEASE_19f, snapshot-2007-03, release-20a-base, cross-sol-x86-base, unicode-utf16-char-support-2009-03-26, unicode-utf16-char-support-2009-03-25, unicode-utf16-extfmts-pre-sync-2008-11, snapshot-2008-10, snapshot-2007-04, snapshot-2010-12, snapshot-2010-11, unicode-utf16-sync-2008-11, snapshot-2007-07, snapshot-2011-09, snapshot-2011-06, snapshot-2011-07, snapshot-2011-04, snapshot-2007-06, snapshot-2011-02, snapshot-2011-03, snapshot-2011-01, pre-merge-intl-branch, double-double-array-checkpoint, double-double-reader-checkpoint-1, release-19d-base, release-19e-pre1, double-double-irrat-end, release-19e-pre2, snapshot-2010-05, snapshot-2010-04, snapshot-2010-07, snapshot-2010-06, snapshot-2010-01, snapshot-2010-03, snapshot-2010-02, release-19d-pre2, release-19d-pre1, snapshot-2010-08, double-double-init-checkpoint-1, double-double-reader-base, label-2009-03-25, cross-sol-x86-2010-12-20, double-double-init-x86, sse2-checkpoint-2008-10-01, intl-branch-2010-03-18-1300, snapshot-2005-11, double-double-sparc-checkpoint-1, sse2-merge-with-2008-11, sse2-merge-with-2008-10, snapshot-2005-10, RELEASE_20a, snapshot-2005-12, release-20a-pre1, snapshot-2009-11, snapshot-2009-12, unicode-utf16-extfmt-2009-06-11, portable-clx-import-2009-06-16, unicode-utf16-string-support, release-19c-pre1, cross-sparc-branch-base, release-19e-base, intl-branch-base, double-double-irrat-start, unicode-utf16-base, portable-clx-base, snapshot-2009-08, snapshot-2007-12, snapshot-2007-10, snapshot-2007-11, snapshot-2009-02, snapshot-2009-01, snapshot-2009-07, snapshot-2009-05, snapshot-2009-04, snapshot-2006-02, snapshot-2006-03, snapshot-2006-01, snapshot-2006-06, snapshot-2006-07, snapshot-2006-04, snapshot-2006-05, pre-telent-clx, snapshot-2006-08, snapshot-2006-09, HEAD
Branch point for: double-double-reader-branch, double-double-array-branch, RELEASE-19F-BRANCH, portable-clx-branch, cross-sparc-branch, RELEASE-20B-BRANCH, unicode-string-buffer-branch, sparc-tramp-assem-branch, release-19d-branch, sse2-packed-branch, RELEASE-20A-BRANCH, amd64-dd-branch, double-double-branch, unicode-string-buffer-impl-branch, intl-branch, unicode-utf16-branch, cross-sol-x86-branch, release-19e-branch, sse2-branch, release-19c-branch, intl-2-branch, unicode-utf16-extfmt-branch
Changes since 1.6: +5 -4 lines
File MIME type: text/plain
Indent all source files using GNU indent using the config in
.indent.pro.
1 /*
2 * $Header: /tiger/var/lib/cvsroots/cmucl/src/lisp/runprog.c,v 1.7 2005/09/15 18:26:52 rtoy Rel $
3 *
4 * Support for run-program.
5 *
6 */
7
8 #include <sys/ioctl.h>
9 #include <errno.h>
10 #include <fcntl.h>
11 #include <signal.h>
12 #include <stdlib.h>
13 #include <termios.h>
14 #include <unistd.h>
15
16 pid_t
17 spawn(char *program, char *argv[], char *envp[], char *pty_name,
18 int stdin, int stdout, int stderr)
19 {
20 pid_t pid;
21 sigset_t set;
22 int fd;
23
24 pid = fork();
25 if (pid != 0)
26 return pid;
27
28 /* Put us in our own process group. */
29 setsid();
30
31 /* Unblock all signals. */
32 sigemptyset(&set);
33 sigprocmask(SIG_SETMASK, &set, NULL);
34
35 /* If we are supposed to be part of some other pty, go for it. */
36 if (pty_name) {
37 #ifdef TIOCNOTTY
38 fd = open("/dev/tty", O_RDWR, 0);
39 if (fd >= 0) {
40 ioctl(fd, TIOCNOTTY, 0);
41 close(fd);
42 }
43 #endif
44
45 fd = open(pty_name, O_RDWR, 0);
46 dup2(fd, 0);
47 dup2(fd, 1);
48 dup2(fd, 2);
49 close(fd);
50 }
51
52 /* Set up stdin, stdout, and stderr. */
53 if (stdin >= 0)
54 dup2(stdin, 0);
55 if (stdout >= 0)
56 dup2(stdout, 1);
57 if (stderr >= 0)
58 dup2(stderr, 2);
59
60 /* Close all other fds. */
61 for (fd = sysconf(_SC_OPEN_MAX) - 1; fd >= 3; fd--)
62 close(fd);
63
64 /* Exec the program. */
65 execve(program, argv, envp);
66
67 /* It didn't work, so try /bin/sh. */
68 argv[0] = program;
69 argv[-1] = "sh";
70 execve("/bin/sh", argv - 1, envp);
71
72 /* The exec didn't work, flame out. */
73 exit(1);
74 }

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