mirror of
https://github.com/moparisthebest/pacman
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eb19d41d5f
On operating systems we support, the behavior is always such that the kernel will do the right thing as far as invalidating the file descriptor, regardless of the eventual return value. Therefore, potentially looping and calling close multiple times is wrong. At best, we call close again on an invalid FD and throw a spurious EBADF error. At worst, we might close an FD which doesn't belong to us when a multi-threaded application opens its own file descriptor between iterations of the loop. Signed-off-by: Dave Reisner <dreisner@archlinux.org> Signed-off-by: Allan McRae <allan@archlinux.org>
158 lines
5.8 KiB
C
158 lines
5.8 KiB
C
/*
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* util.h
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*
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* Copyright (c) 2006-2013 Pacman Development Team <pacman-dev@archlinux.org>
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* Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
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* Copyright (c) 2005 by Aurelien Foret <orelien@chez.com>
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* Copyright (c) 2005 by Christian Hamar <krics@linuxforum.hu>
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* Copyright (c) 2006 by David Kimpe <dnaku@frugalware.org>
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* Copyright (c) 2005, 2006 by Miklos Vajna <vmiklos@frugalware.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _ALPM_UTIL_H
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#define _ALPM_UTIL_H
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#include "alpm_list.h"
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#include "alpm.h"
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#include "package.h" /* alpm_pkg_t */
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#include "handle.h" /* alpm_handle_t */
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#include "util-common.h"
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#include <stdio.h>
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#include <string.h>
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#include <stdarg.h>
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#include <stddef.h> /* size_t */
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#include <sys/types.h>
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#include <sys/stat.h> /* struct stat */
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#include <math.h> /* fabs */
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#include <float.h> /* DBL_EPSILON */
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#include <fcntl.h> /* open, close */
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#include <archive.h> /* struct archive */
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#ifdef ENABLE_NLS
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#include <libintl.h> /* here so it doesn't need to be included elsewhere */
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/* define _() as shortcut for gettext() */
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#define _(str) dgettext ("libalpm", str)
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#else
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#define _(s) s
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#endif
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void _alpm_alloc_fail(size_t size);
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#define MALLOC(p, s, action) do { p = malloc(s); if(p == NULL) { _alpm_alloc_fail(s); action; } } while(0)
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#define CALLOC(p, l, s, action) do { p = calloc(l, s); if(p == NULL) { _alpm_alloc_fail(l * s); action; } } while(0)
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/* This strdup macro is NULL safe- copying NULL will yield NULL */
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#define STRDUP(r, s, action) do { if(s != NULL) { r = strdup(s); if(r == NULL) { _alpm_alloc_fail(strlen(s)); action; } } else { r = NULL; } } while(0)
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#define STRNDUP(r, s, l, action) do { if(s != NULL) { r = strndup(s, l); if(r == NULL) { _alpm_alloc_fail(l); action; } } else { r = NULL; } } while(0)
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#define FREE(p) do { free(p); p = NULL; } while(0)
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#define ASSERT(cond, action) do { if(!(cond)) { action; } } while(0)
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#define RET_ERR_VOID(handle, err) do { \
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_alpm_log(handle, ALPM_LOG_DEBUG, "returning error %d from %s : %s\n", err, __func__, alpm_strerror(err)); \
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(handle)->pm_errno = (err); \
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return; } while(0)
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#define RET_ERR(handle, err, ret) do { \
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_alpm_log(handle, ALPM_LOG_DEBUG, "returning error %d from %s : %s\n", err, __func__, alpm_strerror(err)); \
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(handle)->pm_errno = (err); \
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return (ret); } while(0)
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#define DOUBLE_EQ(x, y) (fabs((x) - (y)) < DBL_EPSILON)
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#define CHECK_HANDLE(handle, action) do { if(!(handle)) { action; } (handle)->pm_errno = 0; } while(0)
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/** Standard buffer size used throughout the library. */
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#ifdef BUFSIZ
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#define ALPM_BUFFER_SIZE BUFSIZ
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#else
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#define ALPM_BUFFER_SIZE 8192
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#endif
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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#define OPEN(fd, path, flags) do { fd = open(path, flags | O_BINARY); } while(fd == -1 && errno == EINTR)
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/**
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* Used as a buffer/state holder for _alpm_archive_fgets().
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*/
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struct archive_read_buffer {
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char *line;
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char *line_offset;
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size_t line_size;
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size_t max_line_size;
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size_t real_line_size;
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char *block;
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char *block_offset;
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size_t block_size;
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int ret;
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};
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int _alpm_makepath(const char *path);
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int _alpm_makepath_mode(const char *path, mode_t mode);
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int _alpm_copyfile(const char *src, const char *dest);
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size_t _alpm_strip_newline(char *str, size_t len);
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int _alpm_open_archive(alpm_handle_t *handle, const char *path,
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struct stat *buf, struct archive **archive, alpm_errno_t error);
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int _alpm_unpack_single(alpm_handle_t *handle, const char *archive,
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const char *prefix, const char *filename);
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int _alpm_unpack(alpm_handle_t *handle, const char *archive, const char *prefix,
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alpm_list_t *list, int breakfirst);
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ssize_t _alpm_files_in_directory(alpm_handle_t *handle, const char *path, int full_count);
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int _alpm_logaction(alpm_handle_t *handle, const char *prefix, const char *fmt, va_list args)
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__attribute__((format(printf, 3, 0)));
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int _alpm_run_chroot(alpm_handle_t *handle, const char *cmd, char *const argv[]);
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int _alpm_ldconfig(alpm_handle_t *handle);
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int _alpm_str_cmp(const void *s1, const void *s2);
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char *_alpm_filecache_find(alpm_handle_t *handle, const char *filename);
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const char *_alpm_filecache_setup(alpm_handle_t *handle);
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int _alpm_lstat(const char *path, struct stat *buf);
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int _alpm_test_checksum(const char *filepath, const char *expected, alpm_pkgvalidation_t type);
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int _alpm_archive_fgets(struct archive *a, struct archive_read_buffer *b);
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int _alpm_splitname(const char *target, char **name, char **version,
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unsigned long *name_hash);
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unsigned long _alpm_hash_sdbm(const char *str);
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off_t _alpm_strtoofft(const char *line);
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alpm_time_t _alpm_parsedate(const char *line);
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int _alpm_raw_cmp(const char *first, const char *second);
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int _alpm_raw_ncmp(const char *first, const char *second, size_t max);
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int _alpm_access(alpm_handle_t *handle, const char *dir, const char *file, int amode);
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int _alpm_fnmatch_patterns(alpm_list_t *patterns, const char *string);
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int _alpm_fnmatch(const void *pattern, const void *string);
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#ifndef HAVE_STRSEP
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char *strsep(char **, const char *);
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#endif
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/* check exported library symbols with: nm -C -D <lib> */
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#define SYMEXPORT __attribute__((visibility("default")))
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#define SYMHIDDEN __attribute__((visibility("internal")))
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#define UNUSED __attribute__((unused))
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#endif /* _ALPM_UTIL_H */
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/* vim: set ts=2 sw=2 noet: */
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