xbps/lib/util.c

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/*-
* Copyright (c) 2008-2010 Juan Romero Pardines.
* 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 ``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 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.
*/
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <ctype.h>
#include <sys/utsname.h>
#include <sys/mman.h>
#include <limits.h>
#include "config.h"
#include <openssl/sha.h>
#include <xbps_api.h>
#include "xbps_api_impl.h"
/**
* @file lib/util.c
* @brief Utility routines
* @defgroup util Utility functions
*/
static const char *rootdir;
static const char *cachedir;
static int flags;
static void
digest2string(const uint8_t *digest, char *string, size_t len)
{
while (len--) {
if (*digest / 16 < 10)
*string++ = '0' + *digest / 16;
else
*string++ = 'a' + *digest / 16 - 10;
if (*digest % 16 < 10)
*string++ = '0' + *digest % 16;
else
*string++ = 'a' + *digest % 16 - 10;
++digest;
}
*string = '\0';
}
char *
xbps_get_file_hash(const char *file)
{
struct stat st;
size_t pgsize = (size_t)sysconf(_SC_PAGESIZE);
size_t pgmask = pgsize - 1, mapsize;
char hash[SHA256_DIGEST_LENGTH * 2 + 1];
unsigned char *buf = NULL, digest[SHA256_DIGEST_LENGTH];
int fd;
bool need_guard = false;
if ((fd = open(file, O_RDONLY)) == -1) {
free(buf);
return NULL;
}
memset(&st, 0, sizeof(st));
if (fstat(fd, &st) == -1) {
(void)close(fd);
return NULL;
}
if (st.st_size > SSIZE_MAX - 1) {
(void)close(fd);
return NULL;
}
mapsize = ((size_t)st.st_size + pgmask) & ~pgmask;
if (mapsize < (size_t)st.st_size) {
(void)close(fd);
return NULL;
}
/*
* If the file length is an integral number of pages, then we
* need to map a guard page at the end in order to provide the
* necessary NUL-termination of the buffer.
*/
if ((st.st_size & pgmask) == 0)
need_guard = true;
buf = mmap(NULL, need_guard ? mapsize + pgsize : mapsize,
PROT_READ, MAP_FILE|MAP_PRIVATE, fd, 0);
(void)close(fd);
if (buf == MAP_FAILED)
return NULL;
if (SHA256(buf, st.st_size, digest) == NULL) {
munmap(buf, mapsize);
return NULL;
}
munmap(buf, mapsize);
digest2string(digest, hash, SHA256_DIGEST_LENGTH);
return strdup(hash);
}
int
xbps_check_file_hash(const char *file, const char *sha256)
{
char *res;
res = xbps_get_file_hash(file);
if (res == NULL)
return errno;
if (strcmp(sha256, res)) {
free(res);
return ERANGE;
}
free(res);
return 0;
}
bool
xbps_check_is_repo_string_remote(const char *uri)
{
assert(uri != NULL);
if ((strncmp(uri, "https://", 8) == 0) ||
(strncmp(uri, "http://", 7) == 0) ||
(strncmp(uri, "ftp://", 6) == 0))
return true;
return false;
}
static const char *
xbps_get_pkgver_from_dict(prop_dictionary_t d)
{
const char *pkgver = NULL;
assert(d != NULL);
prop_dictionary_get_cstring_nocopy(d, "pkgver", &pkgver);
return pkgver;
}
int
xbps_check_is_installed_pkg(const char *pkg)
{
prop_dictionary_t dict;
const char *instpkgver = NULL;
char *pkgname;
int rv = 0;
pkg_state_t state = 0;
assert(pkg != NULL);
pkgname = xbps_get_pkgpattern_name(pkg);
if (pkgname == NULL)
return -1;
dict = xbps_find_pkg_dict_installed(pkgname, false);
if (dict == NULL) {
free(pkgname);
if (errno == ENOENT) {
errno = 0;
return 0; /* not installed */
}
return -1;
}
/*
* Check that package state is fully installed, not
* unpacked or something else.
*/
if (xbps_get_pkg_state_dictionary(dict, &state) != 0) {
prop_object_release(dict);
free(pkgname);
return -1;
}
if (state != XBPS_PKG_STATE_INSTALLED) {
prop_object_release(dict);
free(pkgname);
return 0; /* not fully installed */
}
free(pkgname);
/* Check if installed pkg is matched against pkgdep pattern */
instpkgver = xbps_get_pkgver_from_dict(dict);
if (instpkgver == NULL) {
prop_object_release(dict);
return -1;
}
rv = xbps_pkgpattern_match(instpkgver, __UNCONST(pkg));
prop_object_release(dict);
return rv;
}
bool
xbps_check_is_installed_pkgname(const char *pkgname)
{
prop_dictionary_t pkgd;
assert(pkgname != NULL);
pkgd = xbps_find_pkg_dict_installed(pkgname, false);
if (pkgd) {
prop_object_release(pkgd);
return true;
}
return false;
}
const char *
xbps_get_pkg_epoch(const char *pkg)
{
const char *tmp;
assert(pkg != NULL);
tmp = strrchr(pkg, ':');
if (tmp == NULL)
return NULL;
return tmp + 1; /* skip first ':' */
}
const char *
xbps_get_pkg_version(const char *pkg)
{
const char *tmp;
assert(pkg != NULL);
/* Get the required version */
tmp = strrchr(pkg, '-');
if (tmp == NULL)
return NULL;
return tmp + 1; /* skip first '-' */
}
const char *
xbps_get_pkg_revision(const char *pkg)
{
const char *tmp;
assert(pkg != NULL);
/* Get the required revision */
tmp = strrchr(pkg, '_');
if (tmp == NULL)
return NULL;
return tmp + 1; /* skip first '_' */
}
char *
xbps_get_pkg_name(const char *pkg)
{
const char *tmp;
char *pkgname;
size_t len = 0;
assert(pkg != NULL);
/* Get package name */
tmp = strrchr(pkg, '-');
if (tmp == NULL)
return NULL;
len = strlen(pkg) - strlen(tmp) + 1;
pkgname = malloc(len);
if (pkgname == NULL)
return NULL;
strlcpy(pkgname, pkg, len);
return pkgname;
}
char *
xbps_get_pkgpattern_name(const char *pkg)
{
char *res, *pkgname;
size_t len;
assert(pkg != NULL);
res = strpbrk(pkg, "><=");
if (res == NULL)
return NULL;
len = strlen(pkg) - strlen(res) + 1;
pkgname = malloc(len);
if (pkgname == NULL)
return NULL;
strlcpy(pkgname, pkg, len);
return pkgname;
}
const char *
xbps_get_pkgpattern_version(const char *pkg)
{
char *res;
assert(pkg != NULL);
res = strpbrk(pkg, "><=");
if (res == NULL)
return NULL;
return res;
}
static char *
get_pkg_index_remote_plist(const char *uri)
{
char *uri_fixed, *repodir;
uri_fixed = xbps_get_remote_repo_string(uri);
if (uri_fixed == NULL)
return NULL;
repodir = xbps_xasprintf("%s/%s/%s/%s",
xbps_get_rootdir(), XBPS_META_PATH, uri_fixed, XBPS_PKGINDEX);
if (repodir == NULL) {
free(uri_fixed);
return NULL;
}
free(uri_fixed);
return repodir;
}
char *
xbps_get_pkg_index_plist(const char *uri)
{
struct utsname un;
assert(uri != NULL);
if (uname(&un) == -1)
return NULL;
if (xbps_check_is_repo_string_remote(uri))
return get_pkg_index_remote_plist(uri);
return xbps_xasprintf("%s/%s/%s", uri, un.machine, XBPS_PKGINDEX);
}
char *
xbps_get_binpkg_repo_uri(prop_dictionary_t pkg_repod)
{
const char *filen, *arch, *cdir, *repoloc;
char *lbinpkg = NULL;
prop_dictionary_get_cstring_nocopy(pkg_repod, "filename", &filen);
prop_dictionary_get_cstring_nocopy(pkg_repod, "architecture", &arch);
prop_dictionary_get_cstring_nocopy(pkg_repod, "repository", &repoloc);
cdir = xbps_get_cachedir();
if (cdir == NULL)
return NULL;
/*
* First check if binpkg is available in cachedir.
*/
lbinpkg = xbps_xasprintf("%s/%s", cdir, filen);
if (lbinpkg == NULL)
return NULL;
if (access(lbinpkg, R_OK) == 0)
return lbinpkg;
free(lbinpkg);
/*
* Local and remote repositories use the same path.
*/
return xbps_xasprintf("%s/%s/%s", repoloc, arch, filen);
}
bool
xbps_pkg_has_rundeps(prop_dictionary_t pkg)
{
prop_array_t array;
assert(pkg != NULL);
array = prop_dictionary_get(pkg, "run_depends");
if (array && prop_array_count(array) > 0)
return true;
return false;
}
void
xbps_set_rootdir(const char *dir)
{
assert(dir != NULL);
rootdir = dir;
}
const char *
xbps_get_rootdir(void)
{
if (rootdir == NULL)
rootdir = "/";
return rootdir;
}
void
xbps_set_cachedir(const char *dir)
{
static char res[PATH_MAX];
int r = 0;
assert(dir != NULL);
r = snprintf(res, sizeof(res) - 1, "%s/%s", xbps_get_rootdir(), dir);
if (r == -1 || r >= (int)sizeof(res) - 1) {
/* If error or truncated set to default */
cachedir = XBPS_CACHE_PATH;
return;
}
cachedir = res;
}
const char *
xbps_get_cachedir(void)
{
static char res[PATH_MAX];
int r = 0;
if (cachedir == NULL) {
r = snprintf(res, sizeof(res) - 1, "%s/%s",
xbps_get_rootdir(), XBPS_CACHE_PATH);
if (r == -1 || r >= (int)sizeof(res) - 1)
return NULL;
cachedir = res;
}
return cachedir;
}
void
xbps_set_flags(int lflags)
{
flags = lflags;
}
int
xbps_get_flags(void)
{
return flags;
}
char *
xbps_xasprintf(const char *fmt, ...)
{
va_list ap;
char *buf;
va_start(ap, fmt);
if (vasprintf(&buf, fmt, ap) == -1)
return NULL;
va_end(ap);
return buf;
}