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Bugzilla bug 77197: use spawn in Neutrino because fork & exec does not

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work in multithreaded programs in Neutrino.  The patch is contributed
by dinglis@qnx.com (Dave Inglis), reviewed and modified by wtc.
This commit is contained in:
wtc%netscape.com 2001-10-17 23:11:25 +00:00
parent 4fcaba9a87
commit 89ef80ca7a
1 changed files with 42 additions and 0 deletions
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42
nsprpub/pr/src/md/unix/uxproces.c
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@ -267,6 +267,46 @@ ForkAndExec(
#ifdef AIX
process->md.pid = (*pr_wp.forkptr)();
#elif defined(NTO)
/*
* fork() & exec() does not work in a multithreaded process.
* Use spawn() instead.
*/
{
int fd_map[3] = { 0, 1, 2 };
if (attr) {
if (attr->stdinFd && attr->stdinFd->secret->md.osfd != 0) {
fd_map[0] = dup(attr->stdinFd->secret->md.osfd);
flags = fcntl(fd_map[0], F_GETFL, 0);
if (flags & O_NONBLOCK)
fcntl(fd_map[0], F_SETFL, flags & ~O_NONBLOCK);
}
if (attr->stdoutFd && attr->stdoutFd->secret->md.osfd != 1) {
fd_map[1] = dup(attr->stdoutFd->secret->md.osfd);
flags = fcntl(fd_map[1], F_GETFL, 0);
if (flags & O_NONBLOCK)
fcntl(fd_map[1], F_SETFL, flags & ~O_NONBLOCK);
}
if (attr->stderrFd && attr->stderrFd->secret->md.osfd != 2) {
fd_map[2] = dup(attr->stderrFd->secret->md.osfd);
flags = fcntl(fd_map[2], F_GETFL, 0);
if (flags & O_NONBLOCK)
fcntl(fd_map[2], F_SETFL, flags & ~O_NONBLOCK);
}
PR_ASSERT(attr->currentDirectory == NULL); /* not implemented */
}
process->md.pid = spawn(path, 3, fd_map, NULL, argv, childEnvp);
if (fd_map[0] != 0)
close(fd_map[0]);
if (fd_map[1] != 1)
close(fd_map[1]);
if (fd_map[2] != 2)
close(fd_map[2]);
}
#else
process->md.pid = fork();
#endif
@ -285,6 +325,7 @@ ForkAndExec(
* the parent process's standard I/O data structures.
*/
#if !defined(NTO)
#ifdef VMS
/* OpenVMS has already handled all this above */
#else
@ -367,6 +408,7 @@ ForkAndExec(
#else
_exit(1);
#endif /* VMS */
#endif /* !NTO */
}
if (newEnvp) {