6ae10f2b89
Game of Trees (Got) is a version control system which prioritizes ease of use and simplicity over flexibility.
65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
/*
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* Copyright (c) 2020 Christian Weisgerber <naddy@FreeBSD.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* 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 WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <stdarg.h>
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/*
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* POSIX mandates that open(symlink, O_NOFOLLOW) fail with errno == ELOOP.
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* FreeBSD chooses to deviate from this, but Got depends on it.
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*/
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int
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open_posix(const char *path, int flags, ...)
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{
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va_list ap;
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mode_t mode;
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int ret;
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if (flags & O_CREAT) {
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va_start(ap, flags);
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mode = va_arg(ap, int);
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va_end(ap);
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ret = open(path, flags, mode);
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} else
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ret = open(path, flags);
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if (ret == -1 && (flags & O_NOFOLLOW) && errno == EMLINK)
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errno = ELOOP;
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return (ret);
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}
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int
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openat_posix(int fd, const char *path, int flags, ...)
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{
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va_list ap;
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mode_t mode;
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int ret;
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if (flags & O_CREAT) {
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va_start(ap, flags);
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mode = va_arg(ap, int);
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va_end(ap);
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ret = openat(fd, path, flags, mode);
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} else
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ret = openat(fd, path, flags);
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if (ret == -1 && (flags & O_NOFOLLOW) && errno == EMLINK)
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errno = ELOOP;
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return (ret);
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}
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