diff options
| author | Philipp Stephani <phst@google.com> | 2020-12-25 11:33:02 +0100 |
|---|---|---|
| committer | Philipp Stephani <phst@google.com> | 2020-12-25 11:54:02 +0100 |
| commit | 3ba34141da77a24c251ee6530f3f72a366fe556e (patch) | |
| tree | 66b28a4a122d20ca29548c8894fba2c6fa4645f3 /lib/spawnattr_setflags.c | |
| parent | 42d58264db165d265cba68d6dbebc53a50738355 (diff) | |
| download | emacs-3ba34141da77a24c251ee6530f3f72a366fe556e.tar.gz emacs-3ba34141da77a24c251ee6530f3f72a366fe556e.tar.bz2 emacs-3ba34141da77a24c251ee6530f3f72a366fe556e.zip | |
Import posix_spawn from Gnulib.
posix_spawn is less error-prone than vfork + exec, and can make use of
system-specific optimizations like `clone' on Linux. Import Gnulib
replacement so that we can use recent additions like
`posix_spawn_file_actions_addchdir'.
The only manual change are to admin/merge-gnulib and .gitignore. All
other changes are due to rerunning merge-gnulib.
* admin/merge-gnulib (GNULIB_MODULES): Add posix_spawn-related
modules.
* .gitignore: Add new generated files.
Diffstat (limited to 'lib/spawnattr_setflags.c')
| -rw-r--r-- | lib/spawnattr_setflags.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/lib/spawnattr_setflags.c b/lib/spawnattr_setflags.c new file mode 100644 index 00000000000..084d5bcea4c --- /dev/null +++ b/lib/spawnattr_setflags.c @@ -0,0 +1,45 @@ +/* Copyright (C) 2000, 2004, 2009-2020 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. */ + +#include <config.h> + +/* Specification. */ +#include <spawn.h> + +#include <errno.h> +#include <string.h> + +#define ALL_FLAGS (POSIX_SPAWN_RESETIDS \ + | POSIX_SPAWN_SETPGROUP \ + | POSIX_SPAWN_SETSIGDEF \ + | POSIX_SPAWN_SETSIGMASK \ + | POSIX_SPAWN_SETSCHEDPARAM \ + | POSIX_SPAWN_SETSCHEDULER \ + | POSIX_SPAWN_USEVFORK) + +/* Store flags in the attribute structure. */ +int +posix_spawnattr_setflags (posix_spawnattr_t *attr, short int flags) +{ + /* Check no invalid bits are set. */ + if (flags & ~ALL_FLAGS) + return EINVAL; + + /* Store the flag word. */ + attr->_flags = flags; + + return 0; +} |