mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
0c5dd7b342
- Improved async signal safety of read() particularly for longjmp() - Started adding cancel cleanup handlers for locks / etc on Windows - Make /dev/tty work better particularly for uses like `foo | less` - Eagerly read console input into a linked list, so poll can signal - Fix some libc definitional bugs, which configure scripts detected
51 lines
2.7 KiB
C
51 lines
2.7 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 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/intrin/leaky.internal.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/mem/internal.h"
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#include "libc/mem/mem.h"
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#include "libc/runtime/runtime.h"
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#include "libc/str/str.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Copies variable to environment.
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*
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* @return 0 on success, or -1 w/ errno and environment is unchanged
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* @raise EINVAL if `name` is empty or contains `'='`
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* @raise ENOMEM if out of memory
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* @see putenv(), getenv()
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* @threadunsafe
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*/
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int setenv(const char *name, const char *value, int overwrite) {
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int rc;
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char *s;
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size_t n, m;
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if (!name || !*name || !value || strchr(name, '=')) return einval();
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if ((s = malloc((n = strlen(name)) + 1 + (m = strlen(value)) + 1))) {
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memcpy(mempcpy(mempcpy(s, name, n), "=", 1), value, m + 1);
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rc = __putenv(s, overwrite);
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} else {
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rc = -1;
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}
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STRACE("setenv(%#s, %#s, %hhhd) → %d% m", name, value, overwrite, rc);
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return rc;
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}
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IGNORE_LEAKS(setenv)
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