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(__spawni): Automatically recognize some more cases when we can use vfork.

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This commit is contained in:
Ulrich Drepper 2005-09-13 18:41:48 +00:00
parent 2ac057a069
commit a9f43ef464
1 changed files with 10 additions and 2 deletions
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12
sysdeps/posix/spawni.c
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@ -1,5 +1,5 @@
/* Guts of POSIX spawn interface. Generic POSIX.1 version.
Copyright (C) 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
Copyright (C) 2000,2001,2002,2003,2004,2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -81,7 +81,15 @@ __spawni (pid_t *pid, const char *file,
short int flags = attrp == NULL ? 0 : attrp->__flags;
/* Generate the new process. */
if (flags & POSIX_SPAWN_USEVFORK)
if ((flags & POSIX_SPAWN_USEVFORK) != 0
/* If no major work is done, allow using vfork. Note that we
might perform the path searching. But this would be done by
a call to execvp(), too, and such a call must be OK according
to POSIX. */
|| ((flags & (POSIX_SPAWN_SETSIGMASK | POSIX_SPAWN_SETSIGDEF
| POSIX_SPAWN_SETSCHEDPARAM | POSIX_SPAWN_SETSCHEDULER
| POSIX_SPAWN_SETPGROUP | POSIX_SPAWN_RESETIDS)) == 0
&& file_actions == NULL))
new_pid = __vfork ();
else
new_pid = __fork ();