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https://github.com/jart/cosmopolitan.git
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39e7f24947
This change fixes an issue with all system calls ending with *at(), when the caller passes `dirfd != AT_FDCWD` and an absolute path. It's because the old code was turning paths like C:\bin\ls into \\C:\bin\ls\C:\bin\ls after being converted from paths like /C/bin/ls. I noticed this when the Emacs dired mode stopped working. It's unclear if it's a regression with Cosmopolitan Libc or if this was introduced by the Emacs v29 upgrade. It also impacted posix_spawn() for which a newly minted example now exists.
56 lines
3 KiB
C
56 lines
3 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2023 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/errno.h"
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#include "libc/proc/posix_spawn.h"
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#include "libc/proc/posix_spawn.internal.h"
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/**
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* Sets posix_spawn() flags.
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*
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* @param attr was initialized by posix_spawnattr_init()
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* @param flags may have any of the following
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* - `POSIX_SPAWN_USEFORK`
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* - `POSIX_SPAWN_USEVFORK`
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* - `POSIX_SPAWN_RESETIDS`
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* - `POSIX_SPAWN_SETPGROUP`
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* - `POSIX_SPAWN_SETSIGDEF`
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* - `POSIX_SPAWN_SETSIGMASK`
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* - `POSIX_SPAWN_SETSCHEDPARAM`
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* - `POSIX_SPAWN_SETSCHEDULER`
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* - `POSIX_SPAWN_SETSID`
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* - `POSIX_SPAWN_SETRLIMIT_NP`
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* @return 0 on success, or errno on error
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* @raise EINVAL if `flags` has invalid bits
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*/
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int posix_spawnattr_setflags(posix_spawnattr_t *attr, short flags) {
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if (flags & ~(POSIX_SPAWN_USEFORK | //
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POSIX_SPAWN_USEVFORK | //
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POSIX_SPAWN_RESETIDS | //
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POSIX_SPAWN_SETPGROUP | //
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POSIX_SPAWN_SETSIGDEF | //
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POSIX_SPAWN_SETSIGMASK | //
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POSIX_SPAWN_SETSCHEDPARAM | //
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POSIX_SPAWN_SETSCHEDULER | //
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POSIX_SPAWN_SETSID | //
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POSIX_SPAWN_SETRLIMIT_NP)) {
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return EINVAL;
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}
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(*attr)->flags = flags;
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return 0;
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}
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