mirror of
https://github.com/moparisthebest/pacman
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e464339e3b
The splitname function is a general utility function and so is better suited to util.h. Rename it to _alpm_splitname to indicate it is an internal libalpm function as was the case prior to splitting local and sync db handling. Signed-off-by: Allan McRae <allan@archlinux.org>
849 lines
20 KiB
C
849 lines
20 KiB
C
/*
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* util.c
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*
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* Copyright (c) 2006-2010 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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#include "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <ctype.h>
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#include <dirent.h>
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#include <time.h>
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#include <syslog.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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/* libarchive */
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#include <archive.h>
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#include <archive_entry.h>
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#ifdef HAVE_LIBSSL
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#include <openssl/md5.h>
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#else
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#include "md5.h"
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#endif
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/* libalpm */
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#include "util.h"
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#include "log.h"
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#include "package.h"
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#include "alpm.h"
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#include "alpm_list.h"
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#include "handle.h"
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#ifndef HAVE_STRSEP
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/* This is a replacement for strsep which is not portable (missing on Solaris).
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* Copyright (c) 2001 by François Gouget <fgouget_at_codeweavers.com> */
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char* strsep(char** str, const char* delims)
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{
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char* token;
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if (*str==NULL) {
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/* No more tokens */
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return NULL;
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}
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token=*str;
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while (**str!='\0') {
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if (strchr(delims,**str)!=NULL) {
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**str='\0';
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(*str)++;
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return token;
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}
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(*str)++;
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}
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/* There is no other token */
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*str=NULL;
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return token;
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}
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#endif
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int _alpm_makepath(const char *path)
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{
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return(_alpm_makepath_mode(path, 0755));
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}
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/* does the same thing as 'mkdir -p' */
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int _alpm_makepath_mode(const char *path, mode_t mode)
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{
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/* A bit of pointer hell here. Descriptions:
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* orig - a copy of path so we can safely butcher it with strsep
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* str - the current position in the path string (after the delimiter)
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* ptr - the original position of str after calling strsep
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* incr - incrementally generated path for use in stat/mkdir call
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*/
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char *orig, *str, *ptr, *incr;
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mode_t oldmask = umask(0000);
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int ret = 0;
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orig = strdup(path);
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incr = calloc(strlen(orig) + 1, sizeof(char));
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str = orig;
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while((ptr = strsep(&str, "/"))) {
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if(strlen(ptr)) {
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/* we have another path component- append the newest component to
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* existing string and create one more level of dir structure */
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strcat(incr, "/");
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strcat(incr, ptr);
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if(access(incr, F_OK)) {
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if(mkdir(incr, mode)) {
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ret = 1;
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break;
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}
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}
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}
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}
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free(orig);
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free(incr);
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umask(oldmask);
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return(ret);
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}
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#define CPBUFSIZE 8 * 1024
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int _alpm_copyfile(const char *src, const char *dest)
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{
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FILE *in, *out;
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size_t len;
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char *buf;
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int ret = 0;
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in = fopen(src, "rb");
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if(in == NULL) {
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return(1);
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}
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out = fopen(dest, "wb");
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if(out == NULL) {
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fclose(in);
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return(1);
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}
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CALLOC(buf, (size_t)CPBUFSIZE, (size_t)1, ret = 1; goto cleanup;);
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/* do the actual file copy */
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while((len = fread(buf, 1, CPBUFSIZE, in))) {
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size_t nwritten = 0;
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nwritten = fwrite(buf, 1, len, out);
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if((nwritten != len) || ferror(out)) {
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pm_errno = PM_ERR_WRITE;
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_alpm_log(PM_LOG_ERROR, _("error writing to file '%s': %s\n"),
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dest, strerror(errno));
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ret = -1;
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goto cleanup;
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}
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}
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/* chmod dest to permissions of src, as long as it is not a symlink */
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struct stat statbuf;
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if(!stat(src, &statbuf)) {
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if(! S_ISLNK(statbuf.st_mode)) {
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fchmod(fileno(out), statbuf.st_mode);
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}
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} else {
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/* stat was unsuccessful */
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ret = 1;
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}
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cleanup:
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fclose(in);
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fclose(out);
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FREE(buf);
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return(ret);
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}
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/* Trim whitespace and newlines from a string
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*/
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char *_alpm_strtrim(char *str)
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{
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char *pch = str;
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if(*str == '\0') {
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/* string is empty, so we're done. */
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return(str);
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}
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while(isspace((unsigned char)*pch)) {
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pch++;
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}
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if(pch != str) {
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memmove(str, pch, (strlen(pch) + 1));
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}
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/* check if there wasn't anything but whitespace in the string. */
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if(*str == '\0') {
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return(str);
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}
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pch = (str + (strlen(str) - 1));
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while(isspace((unsigned char)*pch)) {
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pch--;
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}
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*++pch = '\0';
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return(str);
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}
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/* Create a lock file */
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int _alpm_lckmk()
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{
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int fd;
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char *dir, *ptr;
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const char *file = alpm_option_get_lockfile();
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/* create the dir of the lockfile first */
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dir = strdup(file);
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ptr = strrchr(dir, '/');
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if(ptr) {
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*ptr = '\0';
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}
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_alpm_makepath(dir);
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FREE(dir);
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do {
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fd = open(file, O_WRONLY | O_CREAT | O_EXCL, 0000);
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} while (fd == -1 && errno == EINTR);
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if(fd > 0) {
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FILE *f = fdopen(fd, "w");
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fprintf(f, "%ld\n", (long)getpid());
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fflush(f);
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fsync(fd);
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fclose(f);
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return(fd);
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}
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return(-1);
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}
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/* Remove a lock file */
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int _alpm_lckrm()
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{
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const char *file = alpm_option_get_lockfile();
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if(unlink(file) == -1 && errno != ENOENT) {
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return(-1);
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}
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return(0);
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}
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/* Compression functions */
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/**
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* @brief Unpack a specific file in an archive.
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*
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* @param archive the archive to unpack
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* @param prefix where to extract the files
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* @param fn a file within the archive to unpack
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* @return 0 on success, 1 on failure
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*/
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int _alpm_unpack_single(const char *archive, const char *prefix, const char *fn)
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{
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alpm_list_t *list = NULL;
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int ret = 0;
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if(fn == NULL) {
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return(1);
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}
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list = alpm_list_add(list, (void *)fn);
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ret = _alpm_unpack(archive, prefix, list, 1);
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alpm_list_free(list);
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return(ret);
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}
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/**
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* @brief Unpack a list of files in an archive.
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*
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* @param archive the archive to unpack
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* @param prefix where to extract the files
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* @param list a list of files within the archive to unpack or
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* NULL for all
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* @param breakfirst break after the first entry found
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*
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* @return 0 on success, 1 on failure
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*/
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int _alpm_unpack(const char *archive, const char *prefix, alpm_list_t *list, int breakfirst)
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{
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int ret = 0;
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mode_t oldmask;
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struct archive *_archive;
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struct archive_entry *entry;
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char cwd[PATH_MAX];
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int restore_cwd = 0;
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ALPM_LOG_FUNC;
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if((_archive = archive_read_new()) == NULL)
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RET_ERR(PM_ERR_LIBARCHIVE, 1);
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archive_read_support_compression_all(_archive);
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archive_read_support_format_all(_archive);
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if(archive_read_open_filename(_archive, archive,
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ARCHIVE_DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK) {
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_alpm_log(PM_LOG_ERROR, _("could not open %s: %s\n"), archive,
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archive_error_string(_archive));
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RET_ERR(PM_ERR_PKG_OPEN, 1);
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}
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oldmask = umask(0022);
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/* save the cwd so we can restore it later */
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if(getcwd(cwd, PATH_MAX) == NULL) {
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_alpm_log(PM_LOG_ERROR, _("could not get current working directory\n"));
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} else {
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restore_cwd = 1;
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}
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/* just in case our cwd was removed in the upgrade operation */
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if(chdir(prefix) != 0) {
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_alpm_log(PM_LOG_ERROR, _("could not change directory to %s (%s)\n"), prefix, strerror(errno));
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ret = 1;
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goto cleanup;
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}
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while(archive_read_next_header(_archive, &entry) == ARCHIVE_OK) {
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const struct stat *st;
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const char *entryname; /* the name of the file in the archive */
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st = archive_entry_stat(entry);
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entryname = archive_entry_pathname(entry);
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if(S_ISREG(st->st_mode)) {
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archive_entry_set_perm(entry, 0644);
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} else if(S_ISDIR(st->st_mode)) {
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archive_entry_set_perm(entry, 0755);
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}
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/* If specific files were requested, skip entries that don't match. */
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if(list) {
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char *prefix = strdup(entryname);
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char *p = strstr(prefix,"/");
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if(p) {
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*(p+1) = '\0';
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}
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char *found = alpm_list_find_str(list, prefix);
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free(prefix);
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if(!found) {
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if (archive_read_data_skip(_archive) != ARCHIVE_OK) {
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ret = 1;
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goto cleanup;
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}
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continue;
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} else {
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_alpm_log(PM_LOG_DEBUG, "extracting: %s\n", entryname);
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}
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}
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/* Extract the archive entry. */
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int readret = archive_read_extract(_archive, entry, 0);
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if(readret == ARCHIVE_WARN) {
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/* operation succeeded but a non-critical error was encountered */
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_alpm_log(PM_LOG_DEBUG, "warning extracting %s (%s)\n",
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entryname, archive_error_string(_archive));
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} else if(readret != ARCHIVE_OK) {
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_alpm_log(PM_LOG_ERROR, _("could not extract %s (%s)\n"),
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entryname, archive_error_string(_archive));
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ret = 1;
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goto cleanup;
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}
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if(breakfirst) {
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break;
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}
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}
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cleanup:
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umask(oldmask);
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archive_read_finish(_archive);
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if(restore_cwd && chdir(cwd) != 0) {
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_alpm_log(PM_LOG_ERROR, _("could not change directory to %s (%s)\n"), cwd, strerror(errno));
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}
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return(ret);
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}
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/* does the same thing as 'rm -rf' */
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int _alpm_rmrf(const char *path)
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{
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int errflag = 0;
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struct dirent *dp;
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DIR *dirp;
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char name[PATH_MAX];
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struct stat st;
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if(_alpm_lstat(path, &st) == 0) {
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if(!S_ISDIR(st.st_mode)) {
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if(!unlink(path)) {
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return(0);
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} else {
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if(errno == ENOENT) {
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return(0);
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} else {
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return(1);
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}
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}
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} else {
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dirp = opendir(path);
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if(!dirp) {
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return(1);
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}
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for(dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) {
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if(dp->d_ino) {
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sprintf(name, "%s/%s", path, dp->d_name);
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if(strcmp(dp->d_name, "..") != 0 && strcmp(dp->d_name, ".") != 0) {
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errflag += _alpm_rmrf(name);
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}
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}
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}
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closedir(dirp);
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if(rmdir(path)) {
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errflag++;
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}
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}
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return(errflag);
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}
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return(0);
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}
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|
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int _alpm_logaction(int usesyslog, FILE *f, const char *fmt, va_list args)
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{
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int ret = 0;
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|
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if(usesyslog) {
|
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/* we can't use a va_list more than once, so we need to copy it
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* so we can use the original when calling vfprintf below. */
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va_list args_syslog;
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va_copy(args_syslog, args);
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vsyslog(LOG_WARNING, fmt, args_syslog);
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va_end(args_syslog);
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}
|
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|
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if(f) {
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time_t t;
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struct tm *tm;
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t = time(NULL);
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tm = localtime(&t);
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|
|
/* Use ISO-8601 date format */
|
|
fprintf(f, "[%04d-%02d-%02d %02d:%02d] ",
|
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tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday,
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tm->tm_hour, tm->tm_min);
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ret = vfprintf(f, fmt, args);
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fflush(f);
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}
|
|
|
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return(ret);
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}
|
|
|
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int _alpm_run_chroot(const char *root, const char *path, char *const argv[])
|
|
{
|
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char cwd[PATH_MAX];
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pid_t pid;
|
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int pipefd[2];
|
|
int restore_cwd = 0;
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int retval = 0;
|
|
|
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ALPM_LOG_FUNC;
|
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|
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/* save the cwd so we can restore it later */
|
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if(getcwd(cwd, PATH_MAX) == NULL) {
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_alpm_log(PM_LOG_ERROR, _("could not get current working directory\n"));
|
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} else {
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restore_cwd = 1;
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}
|
|
|
|
/* just in case our cwd was removed in the upgrade operation */
|
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if(chdir(root) != 0) {
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_alpm_log(PM_LOG_ERROR, _("could not change directory to %s (%s)\n"), root, strerror(errno));
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|
goto cleanup;
|
|
}
|
|
|
|
_alpm_log(PM_LOG_DEBUG, "executing \"%s\" under chroot \"%s\"\n", path, root);
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|
|
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/* Flush open fds before fork() to avoid cloning buffers */
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|
fflush(NULL);
|
|
|
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if(pipe(pipefd) == -1) {
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_alpm_log(PM_LOG_ERROR, _("could not create pipe (%s)\n"), strerror(errno));
|
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retval = 1;
|
|
goto cleanup;
|
|
}
|
|
|
|
/* fork- parent and child each have seperate code blocks below */
|
|
pid = fork();
|
|
if(pid == -1) {
|
|
_alpm_log(PM_LOG_ERROR, _("could not fork a new process (%s)\n"), strerror(errno));
|
|
retval = 1;
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|
goto cleanup;
|
|
}
|
|
|
|
if(pid == 0) {
|
|
/* this code runs for the child only (the actual chroot/exec) */
|
|
close(1);
|
|
close(2);
|
|
while(dup2(pipefd[1], 1) == -1 && errno == EINTR);
|
|
while(dup2(pipefd[1], 2) == -1 && errno == EINTR);
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|
close(pipefd[0]);
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close(pipefd[1]);
|
|
|
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/* use fprintf instead of _alpm_log to send output through the parent */
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|
if(chroot(root) != 0) {
|
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fprintf(stderr, _("could not change the root directory (%s)\n"), strerror(errno));
|
|
exit(1);
|
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}
|
|
if(chdir("/") != 0) {
|
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fprintf(stderr, _("could not change directory to / (%s)\n"), strerror(errno));
|
|
exit(1);
|
|
}
|
|
umask(0022);
|
|
execv(path, argv);
|
|
fprintf(stderr, _("call to execv failed (%s)\n"), strerror(errno));
|
|
exit(1);
|
|
} else {
|
|
/* this code runs for the parent only (wait on the child) */
|
|
int status;
|
|
FILE *pipe;
|
|
|
|
close(pipefd[1]);
|
|
pipe = fdopen(pipefd[0], "r");
|
|
if(pipe == NULL) {
|
|
close(pipefd[0]);
|
|
retval = 1;
|
|
} else {
|
|
while(!feof(pipe)) {
|
|
char line[PATH_MAX];
|
|
if(fgets(line, PATH_MAX, pipe) == NULL)
|
|
break;
|
|
alpm_logaction("%s", line);
|
|
EVENT(handle->trans, PM_TRANS_EVT_SCRIPTLET_INFO, line, NULL);
|
|
}
|
|
fclose(pipe);
|
|
}
|
|
|
|
while(waitpid(pid, &status, 0) == -1) {
|
|
if(errno != EINTR) {
|
|
_alpm_log(PM_LOG_ERROR, _("call to waitpid failed (%s)\n"), strerror(errno));
|
|
retval = 1;
|
|
goto cleanup;
|
|
}
|
|
}
|
|
|
|
/* report error from above after the child has exited */
|
|
if(retval != 0) {
|
|
_alpm_log(PM_LOG_ERROR, _("could not open pipe (%s)\n"), strerror(errno));
|
|
goto cleanup;
|
|
}
|
|
/* check the return status, make sure it is 0 (success) */
|
|
if(WIFEXITED(status)) {
|
|
_alpm_log(PM_LOG_DEBUG, "call to waitpid succeeded\n");
|
|
if(WEXITSTATUS(status) != 0) {
|
|
_alpm_log(PM_LOG_ERROR, _("command failed to execute correctly\n"));
|
|
retval = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
cleanup:
|
|
if(restore_cwd && chdir(cwd) != 0) {
|
|
_alpm_log(PM_LOG_ERROR, _("could not change directory to %s (%s)\n"), cwd, strerror(errno));
|
|
}
|
|
|
|
return(retval);
|
|
}
|
|
|
|
int _alpm_ldconfig(const char *root)
|
|
{
|
|
char line[PATH_MAX];
|
|
|
|
_alpm_log(PM_LOG_DEBUG, "running ldconfig\n");
|
|
|
|
snprintf(line, PATH_MAX, "%setc/ld.so.conf", root);
|
|
if(access(line, F_OK) == 0) {
|
|
snprintf(line, PATH_MAX, "%ssbin/ldconfig", root);
|
|
if(access(line, X_OK) == 0) {
|
|
char *argv[] = { "ldconfig", NULL };
|
|
_alpm_run_chroot(root, "/sbin/ldconfig", argv);
|
|
}
|
|
}
|
|
|
|
return(0);
|
|
}
|
|
|
|
/* Helper function for comparing strings using the
|
|
* alpm "compare func" signature */
|
|
int _alpm_str_cmp(const void *s1, const void *s2)
|
|
{
|
|
return(strcmp(s1, s2));
|
|
}
|
|
|
|
/** Find a filename in a registered alpm cachedir.
|
|
* @param filename name of file to find
|
|
* @return malloced path of file, NULL if not found
|
|
*/
|
|
char *_alpm_filecache_find(const char* filename)
|
|
{
|
|
char path[PATH_MAX];
|
|
char *retpath;
|
|
alpm_list_t *i;
|
|
|
|
/* Loop through the cache dirs until we find a matching file */
|
|
for(i = alpm_option_get_cachedirs(); i; i = alpm_list_next(i)) {
|
|
snprintf(path, PATH_MAX, "%s%s", (char*)alpm_list_getdata(i),
|
|
filename);
|
|
if(access(path, R_OK) == 0) {
|
|
retpath = strdup(path);
|
|
_alpm_log(PM_LOG_DEBUG, "found cached pkg: %s\n", retpath);
|
|
return(retpath);
|
|
}
|
|
}
|
|
/* package wasn't found in any cachedir */
|
|
return(NULL);
|
|
}
|
|
|
|
/** Check the alpm cachedirs for existance and find a writable one.
|
|
* If no valid cache directory can be found, use /tmp.
|
|
* @return pointer to a writable cache directory.
|
|
*/
|
|
const char *_alpm_filecache_setup(void)
|
|
{
|
|
struct stat buf;
|
|
alpm_list_t *i, *tmp;
|
|
char *cachedir;
|
|
|
|
/* Loop through the cache dirs until we find a writeable dir */
|
|
for(i = alpm_option_get_cachedirs(); i; i = alpm_list_next(i)) {
|
|
cachedir = alpm_list_getdata(i);
|
|
if(stat(cachedir, &buf) != 0) {
|
|
/* cache directory does not exist.... try creating it */
|
|
_alpm_log(PM_LOG_WARNING, _("no %s cache exists, creating...\n"),
|
|
cachedir);
|
|
if(_alpm_makepath(cachedir) == 0) {
|
|
_alpm_log(PM_LOG_DEBUG, "using cachedir: %s\n", cachedir);
|
|
return(cachedir);
|
|
}
|
|
} else if(S_ISDIR(buf.st_mode) && (buf.st_mode & S_IWUSR)) {
|
|
_alpm_log(PM_LOG_DEBUG, "using cachedir: %s\n", cachedir);
|
|
return(cachedir);
|
|
}
|
|
}
|
|
|
|
/* we didn't find a valid cache directory. use /tmp. */
|
|
tmp = alpm_list_add(NULL, strdup("/tmp/"));
|
|
alpm_option_set_cachedirs(tmp);
|
|
_alpm_log(PM_LOG_DEBUG, "using cachedir: %s", "/tmp/\n");
|
|
_alpm_log(PM_LOG_WARNING, _("couldn't create package cache, using /tmp instead\n"));
|
|
return(alpm_list_getdata(tmp));
|
|
}
|
|
|
|
/** lstat wrapper that treats /path/dirsymlink/ the same as /path/dirsymlink.
|
|
* Linux lstat follows POSIX semantics and still performs a dereference on
|
|
* the first, and for uses of lstat in libalpm this is not what we want.
|
|
* @param path path to file to lstat
|
|
* @param buf structure to fill with stat information
|
|
* @return the return code from lstat
|
|
*/
|
|
int _alpm_lstat(const char *path, struct stat *buf)
|
|
{
|
|
int ret;
|
|
char *newpath = strdup(path);
|
|
int len = strlen(newpath);
|
|
|
|
/* strip the trailing slash if one exists */
|
|
if(len != 0 && newpath[len - 1] == '/') {
|
|
newpath[len - 1] = '\0';
|
|
}
|
|
|
|
ret = lstat(newpath, buf);
|
|
|
|
FREE(newpath);
|
|
return(ret);
|
|
}
|
|
|
|
#ifdef HAVE_LIBSSL
|
|
static int md5_file(const char *path, unsigned char output[16])
|
|
{
|
|
FILE *f;
|
|
size_t n;
|
|
MD5_CTX ctx;
|
|
unsigned char *buf;
|
|
|
|
CALLOC(buf, 8192, sizeof(unsigned char), return(1));
|
|
|
|
if((f = fopen(path, "rb")) == NULL) {
|
|
free(buf);
|
|
return(1);
|
|
}
|
|
|
|
MD5_Init(&ctx);
|
|
|
|
while((n = fread(buf, 1, sizeof(buf), f)) > 0) {
|
|
MD5_Update(&ctx, buf, n);
|
|
}
|
|
|
|
MD5_Final(output, &ctx);
|
|
|
|
memset(&ctx, 0, sizeof(MD5_CTX));
|
|
free(buf);
|
|
|
|
if(ferror(f) != 0) {
|
|
fclose(f);
|
|
return(2);
|
|
}
|
|
|
|
fclose(f);
|
|
return(0);
|
|
}
|
|
#endif
|
|
|
|
/** Get the md5 sum of file.
|
|
* @param filename name of the file
|
|
* @return the checksum on success, NULL on error
|
|
* @addtogroup alpm_misc
|
|
*/
|
|
char SYMEXPORT *alpm_compute_md5sum(const char *filename)
|
|
{
|
|
unsigned char output[16];
|
|
char *md5sum;
|
|
int ret, i;
|
|
|
|
ALPM_LOG_FUNC;
|
|
|
|
ASSERT(filename != NULL, return(NULL));
|
|
|
|
/* allocate 32 chars plus 1 for null */
|
|
md5sum = calloc(33, sizeof(char));
|
|
/* defined above for OpenSSL, otherwise defined in md5.h */
|
|
ret = md5_file(filename, output);
|
|
|
|
if (ret > 0) {
|
|
RET_ERR(PM_ERR_NOT_A_FILE, NULL);
|
|
}
|
|
|
|
/* Convert the result to something readable */
|
|
for (i = 0; i < 16; i++) {
|
|
/* sprintf is acceptable here because we know our output */
|
|
sprintf(md5sum +(i * 2), "%02x", output[i]);
|
|
}
|
|
md5sum[32] = '\0';
|
|
|
|
_alpm_log(PM_LOG_DEBUG, "md5(%s) = %s\n", filename, md5sum);
|
|
return(md5sum);
|
|
}
|
|
|
|
int _alpm_test_md5sum(const char *filepath, const char *md5sum)
|
|
{
|
|
char *md5sum2;
|
|
int ret;
|
|
|
|
md5sum2 = alpm_compute_md5sum(filepath);
|
|
|
|
if(md5sum == NULL || md5sum2 == NULL) {
|
|
ret = -1;
|
|
} else if(strcmp(md5sum, md5sum2) != 0) {
|
|
ret = 1;
|
|
} else {
|
|
ret = 0;
|
|
}
|
|
|
|
FREE(md5sum2);
|
|
return(ret);
|
|
}
|
|
|
|
char *_alpm_archive_fgets(char *line, size_t size, struct archive *a)
|
|
{
|
|
/* for now, just read one char at a time until we get to a
|
|
* '\n' char. we can optimize this later with an internal
|
|
* buffer. */
|
|
/* leave room for zero terminator */
|
|
char *last = line + size - 1;
|
|
char *i;
|
|
|
|
for(i = line; i < last; i++) {
|
|
int ret = archive_read_data(a, i, 1);
|
|
/* special check for first read- if null, return null,
|
|
* this indicates EOF */
|
|
if(i == line && (ret <= 0 || *i == '\0')) {
|
|
return(NULL);
|
|
}
|
|
/* check if read value was null or newline */
|
|
if(ret <= 0 || *i == '\0' || *i == '\n') {
|
|
last = i + 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* always null terminate the buffer */
|
|
*last = '\0';
|
|
|
|
return(line);
|
|
}
|
|
|
|
int _alpm_splitname(const char *target, pmpkg_t *pkg)
|
|
{
|
|
/* the format of a db entry is as follows:
|
|
* package-version-rel/
|
|
* package name can contain hyphens, so parse from the back- go back
|
|
* two hyphens and we have split the version from the name.
|
|
*/
|
|
char *tmp, *p, *q;
|
|
|
|
if(target == NULL || pkg == NULL) {
|
|
return(-1);
|
|
}
|
|
STRDUP(tmp, target, RET_ERR(PM_ERR_MEMORY, -1));
|
|
p = tmp + strlen(tmp);
|
|
|
|
/* remove any trailing '/' */
|
|
while (*(p - 1) == '/') {
|
|
--p;
|
|
*p = '\0';
|
|
}
|
|
|
|
/* do the magic parsing- find the beginning of the version string
|
|
* by doing two iterations of same loop to lop off two hyphens */
|
|
for(q = --p; *q && *q != '-'; q--);
|
|
for(p = --q; *p && *p != '-'; p--);
|
|
if(*p != '-' || p == tmp) {
|
|
return(-1);
|
|
}
|
|
|
|
/* copy into fields and return */
|
|
if(pkg->version) {
|
|
FREE(pkg->version);
|
|
}
|
|
STRDUP(pkg->version, p+1, RET_ERR(PM_ERR_MEMORY, -1));
|
|
/* insert a terminator at the end of the name (on hyphen)- then copy it */
|
|
*p = '\0';
|
|
if(pkg->name) {
|
|
FREE(pkg->name);
|
|
}
|
|
STRDUP(pkg->name, tmp, RET_ERR(PM_ERR_MEMORY, -1));
|
|
|
|
free(tmp);
|
|
return(0);
|
|
}
|
|
|
|
/* vim: set ts=2 sw=2 noet: */
|