xbps/lib/util.c
2020-02-08 20:00:56 +01:00

702 lines
14 KiB
C

/*-
* Copyright (c) 2008-2015 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.
*/
#ifdef HAVE_VASPRINTF
# define _GNU_SOURCE /* for vasprintf(3) */
#endif
#if defined(HAVE_STRLCAT) || defined(HAVE_STRLCPY)
# define _BSD_SOURCE
#endif
#include "compat.h"
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <fnmatch.h>
#include <ctype.h>
#include <libgen.h>
#include <sys/utsname.h>
#include "xbps_api_impl.h"
#ifdef __clang__
#pragma clang diagnostic ignored "-Wformat-nonliteral"
#endif
static bool is_revision(const char *str) {
if (str == NULL || str[0] == '\0'){
return false;
}
/* allow underscore for accepting perl-Digest-1.17_01_1 etc. */
while (isdigit(str[0]) || str[0] == '_') {
++str;
}
return str[0] == '\0';
}
/**
* @file lib/util.c
* @brief Utility routines
* @defgroup util Utility functions
*/
bool
xbps_repository_is_remote(const char *uri)
{
assert(uri != NULL);
if ((strncmp(uri, "http://", 7) == 0) ||
(strncmp(uri, "https://", 8) == 0) ||
(strncmp(uri, "ftp://", 6) == 0))
return true;
return false;
}
int
xbps_pkg_is_installed(struct xbps_handle *xhp, const char *pkg)
{
xbps_dictionary_t dict;
pkg_state_t state;
assert(xhp);
assert(pkg);
if (((dict = xbps_pkgdb_get_virtualpkg(xhp, pkg)) == NULL) &&
((dict = xbps_pkgdb_get_pkg(xhp, pkg)) == NULL))
return 0; /* not installed */
/*
* Check that package state is fully installed, not
* unpacked or something else.
*/
if (xbps_pkg_state_dictionary(dict, &state) != 0)
return -1; /* error */
if (state == XBPS_PKG_STATE_INSTALLED || state == XBPS_PKG_STATE_UNPACKED)
return 1;
return 0; /* not fully installed */
}
bool
xbps_pkg_is_ignored(struct xbps_handle *xhp, const char *pkg)
{
char pkgname[XBPS_NAME_SIZE];
bool rv = false;
assert(xhp);
assert(pkg);
if (!xhp->ignored_pkgs)
return false;
if (xbps_pkgpattern_name(pkgname, XBPS_NAME_SIZE, pkg) ||
xbps_pkg_name(pkgname, XBPS_NAME_SIZE, pkg)) {
rv = xbps_match_string_in_array(xhp->ignored_pkgs, pkgname);
return rv;
}
return xbps_match_string_in_array(xhp->ignored_pkgs, pkg);
}
const char *
xbps_pkg_version(const char *pkg)
{
const char *p, *r;
size_t p_len;
assert(pkg);
if ((p = strrchr(pkg, '-')) == NULL)
return NULL;
++p; /* skip first '-' */
p_len = strlen(p);
for (unsigned int i = 0; i < p_len; i++) {
if (p[i] == '_')
break;
if (isdigit((unsigned char)p[i]) && (r = strchr(p + i + 1, '_'))) {
if (!is_revision(r + 1)) {
break;
}
return p;
}
}
return NULL;
}
char *
xbps_binpkg_pkgver(const char *pkg)
{
const char *fname;
char *p, *p1, *res;
unsigned int len;
assert(pkg);
/* skip path if found, only interested in filename */
if ((fname = strrchr(pkg, '/')))
fname++;
else
fname = pkg;
/* 5 == .xbps */
if ((len = strlen(fname)) < 5)
return NULL;
len -= 5;
p = malloc(len+1);
assert(p);
(void)memcpy(p, fname, len);
p[len] = '\0';
if (!(p1 = strrchr(p, '.'))) {
free(p);
return NULL;
}
p[strlen(p)-strlen(p1)] = '\0';
/* sanity check it's a proper pkgver string */
if (xbps_pkg_version(p) == NULL) {
free(p);
return NULL;
}
res = strdup(p);
assert(res);
free(p);
return res;
}
char *
xbps_binpkg_arch(const char *pkg)
{
const char *fname;
char *p, *p1, *res;
unsigned int len;
assert(pkg);
/* skip path if found, only interested in filename */
if ((fname = strrchr(pkg, '/')))
fname++;
else
fname = pkg;
/* 5 == .xbps */
if ((len = strlen(fname)) < 5)
return NULL;
len -= 5;
p = malloc(len+1);
assert(p);
(void)memcpy(p, fname, len);
p[len] = '\0';
if (!(p1 = strrchr(p, '.'))) {
free(p);
return NULL;
}
res = strdup(p1 + 1);
assert(res);
free(p);
return res;
}
const char *
xbps_pkg_revision(const char *pkg)
{
const char *p, *r;
size_t p_len;
assert(pkg);
if ((p = strrchr(pkg, '-')) == NULL)
return NULL;
++p; /* skip first '-' */
p_len = strlen(p);
for (unsigned int i = 0; i < p_len; i++) {
if (p[i] == '_')
break;
if (isdigit((unsigned char)p[i]) && (r = strchr(p + i + 1, '_'))) {
if (!is_revision(r + 1)) {
break;
}
return strrchr(r, '_') + 1;
}
}
return NULL;
}
bool
xbps_pkg_name(char *dst, size_t len, const char *pkg)
{
const char *p, *r;
size_t plen;
bool valid = false;
assert(dst);
assert(pkg);
if ((p = strrchr(pkg, '-')) == NULL)
return false;
plen = strlen(p);
/* i = 1 skips first '-' */
for (unsigned int i = 1; i < plen; i++) {
if (p[i] == '_')
break;
if (isdigit((unsigned char)p[i]) && (r = strchr(p + i + 1, '_'))) {
valid = is_revision(r + 1);
break;
}
}
if (!valid)
return false;
plen = strlen(pkg) - strlen(p) + 1;
if (plen > len)
return false;
memcpy(dst, pkg, plen-1);
dst[plen-1] = '\0';
return true;
}
bool
xbps_pkgpattern_name(char *dst, size_t len, const char *pkg)
{
const char *res;
size_t plen;
assert(dst);
assert(pkg);
if ((res = strpbrk(pkg, "><*?[]")) == NULL)
return false;
plen = strlen(pkg) - strlen(res) + 1;
if (strlen(pkg) < plen-2)
return false;
if (pkg[plen-2] == '-')
plen--;
if (plen > len)
return false;
memcpy(dst, pkg, plen-1);
dst[plen-1] = '\0';
return true;
}
const char *
xbps_pkgpattern_version(const char *pkg)
{
assert(pkg != NULL);
return strpbrk(pkg, "><*?[]");
}
char *
xbps_repository_pkg_path(struct xbps_handle *xhp, xbps_dictionary_t pkg_repod)
{
const char *pkgver, *arch, *repoloc;
char *lbinpkg = NULL;
assert(xhp);
assert(xbps_object_type(pkg_repod) == XBPS_TYPE_DICTIONARY);
if (!xbps_dictionary_get_cstring_nocopy(pkg_repod,
"pkgver", &pkgver))
return NULL;
if (!xbps_dictionary_get_cstring_nocopy(pkg_repod,
"architecture", &arch))
return NULL;
if (!xbps_dictionary_get_cstring_nocopy(pkg_repod,
"repository", &repoloc))
return NULL;
if (xbps_repository_is_remote(repoloc)) {
/*
* First check if binpkg is available in cachedir.
*/
lbinpkg = xbps_xasprintf("%s/%s.%s.xbps", xhp->cachedir,
pkgver, arch);
if (access(lbinpkg, R_OK) == 0)
return lbinpkg;
free(lbinpkg);
}
/*
* Local and remote repositories use the same path.
*/
return xbps_xasprintf("%s/%s.%s.xbps", repoloc, pkgver, arch);
}
bool
xbps_binpkg_exists(struct xbps_handle *xhp, xbps_dictionary_t pkgd)
{
char path[PATH_MAX];
const char *pkgver, *arch, *repoloc;
assert(xhp);
assert(xbps_object_type(pkgd) == XBPS_TYPE_DICTIONARY);
if (!xbps_dictionary_get_cstring_nocopy(pkgd,
"pkgver", &pkgver))
return NULL;
if (!xbps_dictionary_get_cstring_nocopy(pkgd,
"architecture", &arch))
return NULL;
if (!xbps_dictionary_get_cstring_nocopy(pkgd,
"repository", &repoloc))
return NULL;
snprintf(path, sizeof(path), "%s/%s.%s.xbps",
xbps_repository_is_remote(repoloc) ? xhp->cachedir : repoloc,
pkgver, arch);
return access(path, R_OK) == 0;
}
bool
xbps_remote_binpkg_exists(struct xbps_handle *xhp, xbps_dictionary_t pkgd)
{
char path[PATH_MAX];
const char *pkgver, *arch;
assert(xhp);
assert(xbps_object_type(pkgd) == XBPS_TYPE_DICTIONARY);
if (!xbps_dictionary_get_cstring_nocopy(pkgd,
"pkgver", &pkgver))
return NULL;
if (!xbps_dictionary_get_cstring_nocopy(pkgd,
"architecture", &arch))
return NULL;
snprintf(path, sizeof(path), "%s/%s.%s.xbps.sig", xhp->cachedir,
pkgver, arch);
/* check if the signature file exists */
if (access(path, R_OK) != 0)
return false;
/* strip the .sig suffix and check if binpkg file exists */
path[strlen(path)-sizeof (".sig")+1] = '\0';
return access(path, R_OK) == 0;
}
bool
xbps_pkg_has_rundeps(xbps_dictionary_t pkgd)
{
xbps_array_t array;
assert(xbps_object_type(pkgd) == XBPS_TYPE_DICTIONARY);
array = xbps_dictionary_get(pkgd, "run_depends");
if (xbps_array_count(array))
return true;
return false;
}
bool
xbps_pkg_arch_match(struct xbps_handle *xhp, const char *orig,
const char *target)
{
const char *arch;
assert(xhp);
assert(orig);
if (xhp->target_arch)
arch = xhp->target_arch;
else
arch = xhp->native_arch;
if (target == NULL) {
if ((strcmp(orig, "noarch") == 0) ||
(strcmp(orig, arch) == 0))
return true;
} else {
if ((strcmp(orig, "noarch") == 0) ||
(strcmp(orig, target) == 0))
return true;
}
return false;
}
char *
xbps_xasprintf(const char *fmt, ...)
{
va_list ap;
char *buf = NULL;
va_start(ap, fmt);
if (vasprintf(&buf, fmt, ap) == -1) {
va_end(ap);
assert(buf);
}
va_end(ap);
assert(buf);
return buf;
}
/*
* Match pkg against pattern, return 1 if matching, 0 otherwise or -1 on error.
*/
int
xbps_pkgpattern_match(const char *pkg, const char *pattern)
{
assert(pkg);
assert(pattern);
/* simple match on "pkg" against "pattern" */
if (strcmp(pattern, pkg) == 0)
return 1;
/* perform relational dewey match on version number */
if (strpbrk(pattern, "<>") != NULL)
return dewey_match(pattern, pkg);
/* glob match */
if (strpbrk(pattern, "*?[]") != NULL)
if (fnmatch(pattern, pkg, FNM_PERIOD) == 0)
return 1;
/* no match */
return 0;
}
/*
* Small wrapper for NetBSD's humanize_number(3) with some
* defaults set that we care about.
*/
int
xbps_humanize_number(char *buf, int64_t bytes)
{
assert(buf != NULL);
return humanize_number(buf, 7, bytes, "B",
HN_AUTOSCALE, HN_DECIMAL|HN_NOSPACE);
}
size_t
xbps_strlcat(char *dest, const char *src, size_t siz)
{
assert(dest);
assert(src);
return strlcat(dest, src, siz);
}
size_t
xbps_strlcpy(char *dest, const char *src, size_t siz)
{
assert(dest);
assert(src);
return strlcpy(dest, src, siz);
}
/*
* Check if pkg is explicitly marked to replace a specific installed version.
*/
bool
xbps_pkg_reverts(xbps_dictionary_t pkg, const char *pkgver)
{
unsigned int i;
xbps_array_t reverts;
const char *version = xbps_pkg_version(pkgver);
const char *revertver = NULL;
assert(pkg);
assert(pkgver);
if ((reverts = xbps_dictionary_get(pkg, "reverts")) == NULL)
return false;
for (i = 0; i < xbps_array_count(reverts); i++) {
xbps_array_get_cstring_nocopy(reverts, i, &revertver);
if (strcmp(version, revertver) == 0) {
return true;
}
}
return false;
}
char *
xbps_sanitize_path(const char *src)
{
const char *s = src;
char *d, *dest;
size_t len;
assert(src);
len = strlen(src);
assert(len != 0);
dest = malloc(len+1);
assert(dest);
d = dest;
while ((*d = *s)) {
if (*s == '/' && *(s+1) == '/') {
s++;
continue;
}
d++, s++;
}
*d = '\0';
return dest;
}
char *
xbps_symlink_target(struct xbps_handle *xhp, const char *path, const char *tgt)
{
struct stat sb;
char *res = NULL, *lnk = NULL, *p = NULL, *p1 = NULL, *dname = NULL;
char *rootdir = NULL;
ssize_t r;
assert(xhp);
assert(path);
assert(tgt);
if (lstat(path, &sb) == -1)
return NULL;
lnk = malloc(sb.st_size + 1);
assert(lnk);
r = readlink(path, lnk, sb.st_size + 1);
if (r < 0 || r > sb.st_size) {
free(lnk);
return NULL;
}
lnk[sb.st_size] = '\0';
if (tgt[0] != '/') {
/*
* target file is relative and wasn't converted to absolute by
* xbps-create(8), just compare it as is.
*/
return lnk;
}
rootdir = realpath(xhp->rootdir, NULL);
if (rootdir == NULL) {
free(lnk);
return NULL;
}
if (strstr(lnk, "./")) {
/* contains references to relative paths */
p = realpath(path, NULL);
if (p == NULL) {
/* dangling symlink, use target */
free(rootdir);
free(lnk);
return strdup(tgt);
}
if (strcmp(rootdir, "/") == 0) {
res = strdup(p);
} else {
p1 = strdup(p + strlen(rootdir));
assert(p1);
res = xbps_sanitize_path(p1);
free(p1);
}
free(lnk);
free(p);
} else if (lnk[0] != '/') {
/* relative path */
p = strdup(path);
assert(p);
dname = dirname(p);
assert(dname);
if (strcmp(rootdir, "/") == 0) {
p1 = xbps_xasprintf("%s/%s", dname, lnk);
assert(p1);
res = xbps_sanitize_path(p1);
free(p1);
free(p);
} else {
p1 = strdup(dname + strlen(rootdir));
assert(p1);
free(p);
p = xbps_xasprintf("%s/%s", p1, lnk);
free(p1);
res = xbps_sanitize_path(p);
free(p);
}
free(lnk);
} else {
/* absolute */
res = lnk;
}
assert(res);
free(rootdir);
return res;
}
bool
xbps_patterns_match(xbps_array_t patterns, const char *path)
{
bool match = false;
assert(path);
if (patterns == NULL)
return false;
for (unsigned int i = 0; i < xbps_array_count(patterns); i++) {
const char *pattern = NULL;
bool negate = false;
if (!xbps_array_get_cstring_nocopy(patterns, i, &pattern))
continue;
if (pattern == NULL)
continue;
if ((negate = *pattern == '!') || *pattern == '\\')
pattern++;
if (fnmatch(pattern, path, 0) == 0)
match = !negate;
}
return match;
}