summaryrefslogtreecommitdiffstats
path: root/Utilities/cmlibarchive/libarchive/archive_read_disk_set_standard_lookup.c
diff options
context:
space:
mode:
Diffstat (limited to 'Utilities/cmlibarchive/libarchive/archive_read_disk_set_standard_lookup.c')
-rw-r--r--Utilities/cmlibarchive/libarchive/archive_read_disk_set_standard_lookup.c276
1 files changed, 0 insertions, 276 deletions
diff --git a/Utilities/cmlibarchive/libarchive/archive_read_disk_set_standard_lookup.c b/Utilities/cmlibarchive/libarchive/archive_read_disk_set_standard_lookup.c
deleted file mode 100644
index 57d8228..0000000
--- a/Utilities/cmlibarchive/libarchive/archive_read_disk_set_standard_lookup.c
+++ /dev/null
@@ -1,276 +0,0 @@
-/*-
- * Copyright (c) 2003-2007 Tim Kientzle
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef _XOPEN_SOURCE
-# define _XOPEN_SOURCE 500 /* getpwuid_r and getgrgid_r signatures */
-#endif
-
-#include "archive_platform.h"
-__FBSDID("$FreeBSD$");
-
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_ERRNO_H
-#include <errno.h>
-#endif
-#ifdef HAVE_GRP_H
-#include <grp.h>
-#endif
-#ifdef HAVE_PWD_H
-#include <pwd.h>
-#endif
-#ifdef HAVE_STDLIB_H
-#include <stdlib.h>
-#endif
-#ifdef HAVE_STRING_H
-#include <string.h>
-#endif
-
-#include "archive.h"
-
-#if defined(_WIN32) && !defined(__CYGWIN__)
-int
-archive_read_disk_set_standard_lookup(struct archive *a)
-{
- archive_set_error(a, -1, "Standard lookups not available on Windows");
- return (ARCHIVE_FATAL);
-}
-#else /* ! (_WIN32 && !__CYGWIN__) */
-#define name_cache_size 127
-
-static const char * const NO_NAME = "(noname)";
-
-struct name_cache {
- struct archive *archive;
- char *buff;
- size_t buff_size;
- int probes;
- int hits;
- size_t size;
- struct {
- id_t id;
- const char *name;
- } cache[name_cache_size];
-};
-
-static const char * lookup_gname(void *, gid_t);
-static const char * lookup_uname(void *, uid_t);
-static void cleanup(void *);
-static const char * lookup_gname_helper(struct name_cache *, id_t gid);
-static const char * lookup_uname_helper(struct name_cache *, id_t uid);
-
-/*
- * Installs functions that use getpwuid()/getgrgid()---along with
- * a simple cache to accelerate such lookups---into the archive_read_disk
- * object. This is in a separate file because getpwuid()/getgrgid()
- * can pull in a LOT of library code (including NIS/LDAP functions, which
- * pull in DNS resolveers, etc). This can easily top 500kB, which makes
- * it inappropriate for some space-constrained applications.
- *
- * Applications that are size-sensitive may want to just use the
- * real default functions (defined in archive_read_disk.c) that just
- * use the uid/gid without the lookup. Or define your own custom functions
- * if you prefer.
- */
-int
-archive_read_disk_set_standard_lookup(struct archive *a)
-{
- struct name_cache *ucache = malloc(sizeof(struct name_cache));
- struct name_cache *gcache = malloc(sizeof(struct name_cache));
-
- if (ucache == NULL || gcache == NULL) {
- archive_set_error(a, ENOMEM,
- "Can't allocate uname/gname lookup cache");
- free(ucache);
- free(gcache);
- return (ARCHIVE_FATAL);
- }
-
- memset(ucache, 0, sizeof(*ucache));
- ucache->archive = a;
- ucache->size = name_cache_size;
- memset(gcache, 0, sizeof(*gcache));
- gcache->archive = a;
- gcache->size = name_cache_size;
-
- archive_read_disk_set_gname_lookup(a, gcache, lookup_gname, cleanup);
- archive_read_disk_set_uname_lookup(a, ucache, lookup_uname, cleanup);
-
- return (ARCHIVE_OK);
-}
-
-static void
-cleanup(void *data)
-{
- struct name_cache *cache = (struct name_cache *)data;
- size_t i;
-
- if (cache != NULL) {
- for (i = 0; i < cache->size; i++) {
- if (cache->cache[i].name != NULL &&
- cache->cache[i].name != NO_NAME)
- free((void *)(uintptr_t)cache->cache[i].name);
- }
- free(cache->buff);
- free(cache);
- }
-}
-
-/*
- * Lookup uid/gid from uname/gname, return NULL if no match.
- */
-static const char *
-lookup_name(struct name_cache *cache,
- const char * (*lookup_fn)(struct name_cache *, id_t), id_t id)
-{
- const char *name;
- int slot;
-
-
- cache->probes++;
-
- slot = id % cache->size;
- if (cache->cache[slot].name != NULL) {
- if (cache->cache[slot].id == id) {
- cache->hits++;
- if (cache->cache[slot].name == NO_NAME)
- return (NULL);
- return (cache->cache[slot].name);
- }
- if (cache->cache[slot].name != NO_NAME)
- free((void *)(uintptr_t)cache->cache[slot].name);
- cache->cache[slot].name = NULL;
- }
-
- name = (lookup_fn)(cache, id);
- if (name == NULL) {
- /* Cache and return the negative response. */
- cache->cache[slot].name = NO_NAME;
- cache->cache[slot].id = id;
- return (NULL);
- }
-
- cache->cache[slot].name = name;
- cache->cache[slot].id = id;
- return (cache->cache[slot].name);
-}
-
-static const char *
-lookup_uname(void *data, uid_t uid)
-{
- struct name_cache *uname_cache = (struct name_cache *)data;
- return (lookup_name(uname_cache,
- &lookup_uname_helper, (id_t)uid));
-}
-
-static const char *
-lookup_uname_helper(struct name_cache *cache, id_t id)
-{
- struct passwd pwent, *result;
- int r;
-
- if (cache->buff_size == 0) {
- cache->buff_size = 256;
- cache->buff = malloc(cache->buff_size);
- }
- if (cache->buff == NULL)
- return (NULL);
- for (;;) {
- result = &pwent; /* Old getpwuid_r ignores last argument. */
- r = getpwuid_r((uid_t)id, &pwent,
- cache->buff, cache->buff_size, &result);
- if (r == 0)
- break;
- if (r != ERANGE)
- break;
- /* ERANGE means our buffer was too small, but POSIX
- * doesn't tell us how big the buffer should be, so
- * we just double it and try again. Because the buffer
- * is kept around in the cache object, we shouldn't
- * have to do this very often. */
- cache->buff_size *= 2;
- cache->buff = realloc(cache->buff, cache->buff_size);
- if (cache->buff == NULL)
- break;
- }
- if (r != 0) {
- archive_set_error(cache->archive, errno,
- "Can't lookup user for id %d", (int)id);
- return (NULL);
- }
- if (result == NULL)
- return (NULL);
-
- return strdup(result->pw_name);
-}
-
-static const char *
-lookup_gname(void *data, gid_t gid)
-{
- struct name_cache *gname_cache = (struct name_cache *)data;
- return (lookup_name(gname_cache,
- &lookup_gname_helper, (id_t)gid));
-}
-
-static const char *
-lookup_gname_helper(struct name_cache *cache, id_t id)
-{
- struct group grent, *result;
- int r;
-
- if (cache->buff_size == 0) {
- cache->buff_size = 256;
- cache->buff = malloc(cache->buff_size);
- }
- if (cache->buff == NULL)
- return (NULL);
- for (;;) {
- result = &grent; /* Old getgrgid_r ignores last argument. */
- r = getgrgid_r((gid_t)id, &grent,
- cache->buff, cache->buff_size, &result);
- if (r == 0)
- break;
- if (r != ERANGE)
- break;
- /* ERANGE means our buffer was too small, but POSIX
- * doesn't tell us how big the buffer should be, so
- * we just double it and try again. */
- cache->buff_size *= 2;
- cache->buff = realloc(cache->buff, cache->buff_size);
- if (cache->buff == NULL)
- break;
- }
- if (r != 0) {
- archive_set_error(cache->archive, errno,
- "Can't lookup group for id %d", (int)id);
- return (NULL);
- }
- if (result == NULL)
- return (NULL);
-
- return strdup(result->gr_name);
-}
-#endif /* ! (_WIN32 && !__CYGWIN__) */
generated by cgit v0.12 at 2025-01-02 18:42:19 (GMT)