mirror of
https://github.com/moparisthebest/pacman
synced 2024-08-13 17:03:46 -04:00
Rework extract_single_file() temp file creation
We were a bit juryrigged using one call to mkstemp() before rather than extracting the new files side-by-side and doing our comparisons there. We were also facing some permissions issues. Instead, make our life easier by extracting all temp files to a '.paccheck' extension, doing our md5 comparisons, and then taking the correct actions. Still to be done here- a cleanup of the use of PATH_MAX which should not be necessary if we use dynamic allocation on the heap. Signed-off-by: Dan McGee <dan@archlinux.org>
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@ -434,20 +434,14 @@ static int extract_single_file(struct archive *archive,
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}
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if(needbackup) {
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char *tempfile;
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char checkfile[PATH_MAX];
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char *hash_local = NULL, *hash_pkg = NULL;
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int fd;
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int ret;
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/* extract the package's version to a temporary file and checksum it */
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STRDUP(tempfile, "/tmp/alpm_XXXXXX", RET_ERR(PM_ERR_MEMORY, -1));
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fd = mkstemp(tempfile);
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if(fd == -1) {
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RET_ERR(PM_ERR_SYSTEM, -1);
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}
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snprintf(checkfile, PATH_MAX, "%s.paccheck", filename);
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archive_entry_set_pathname(entry, checkfile);
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ret = archive_read_data_into_fd(archive, fd);
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close(fd);
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ret = archive_read_extract(archive, entry, archive_flags);
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if(ret == 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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@ -457,14 +451,12 @@ static int extract_single_file(struct archive *archive,
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entryname, archive_error_string(archive));
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alpm_logaction("error: could not extract %s (%s)\n",
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entryname, archive_error_string(archive));
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unlink(tempfile);
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FREE(tempfile);
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FREE(hash_orig);
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return(1);
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}
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hash_local = alpm_get_md5sum(filename);
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hash_pkg = alpm_get_md5sum(tempfile);
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hash_pkg = alpm_get_md5sum(checkfile);
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/* append the new md5 hash to it's respective entry
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* in newpkg's backup (it will be the new orginal) */
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@ -500,14 +492,18 @@ static int extract_single_file(struct archive *archive,
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/* move the existing file to the "pacorig" */
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if(rename(filename, newpath)) {
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_alpm_log(PM_LOG_ERROR, _("could not rename %s (%s)\n"), filename, strerror(errno));
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alpm_logaction("error: could not rename %s (%s)\n", filename, strerror(errno));
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_alpm_log(PM_LOG_ERROR, _("could not rename %s to %s (%s)\n"),
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filename, newpath, strerror(errno));
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alpm_logaction("error: could not rename %s to %s (%s)\n",
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filename, newpath, strerror(errno));
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errors++;
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} else {
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/* copy the tempfile we extracted to the real path */
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if(_alpm_copyfile(tempfile, filename)) {
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_alpm_log(PM_LOG_ERROR, _("could not copy tempfile to %s (%s)\n"), filename, strerror(errno));
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alpm_logaction("error: could not copy tempfile to %s (%s)\n", filename, strerror(errno));
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/* rename the file we extracted to the real name */
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if(rename(checkfile, filename)) {
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_alpm_log(PM_LOG_ERROR, _("could not rename %s to %s (%s)\n"),
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checkfile, filename, strerror(errno));
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alpm_logaction("error: could not rename %s to %s (%s)\n",
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checkfile, filename, strerror(errno));
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errors++;
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} else {
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_alpm_log(PM_LOG_WARNING, _("%s saved as %s\n"), filename, newpath);
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@ -524,35 +520,45 @@ static int extract_single_file(struct archive *archive,
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_alpm_log(PM_LOG_DEBUG, "action: installing new file: %s\n",
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entryname);
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if(_alpm_copyfile(tempfile, filename)) {
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_alpm_log(PM_LOG_ERROR, _("could not copy tempfile to %s (%s)\n"), filename, strerror(errno));
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if(rename(checkfile, filename)) {
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_alpm_log(PM_LOG_ERROR, _("could not rename %s to %s (%s)\n"),
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checkfile, filename, strerror(errno));
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alpm_logaction("error: could not rename %s to %s (%s)\n",
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checkfile, filename, strerror(errno));
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errors++;
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}
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} else {
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/* there's no sense in installing the same file twice, install
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* ONLY is the original and package hashes differ */
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_alpm_log(PM_LOG_DEBUG, "action: leaving existing file in place\n");
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unlink(checkfile);
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}
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} else if(strcmp(hash_orig, hash_pkg) == 0) {
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/* originally installed file and new file are the same - this
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* implies the case above failed - i.e. the file was changed by a
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* user */
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_alpm_log(PM_LOG_DEBUG, "action: leaving existing file in place\n");
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unlink(checkfile);
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} else if(strcmp(hash_local, hash_pkg) == 0) {
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/* this would be magical. The above two cases failed, but the
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* user changes just so happened to make the new file exactly the
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* same as the one in the package... skip it */
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_alpm_log(PM_LOG_DEBUG, "action: leaving existing file in place\n");
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unlink(checkfile);
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} else {
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char newpath[PATH_MAX];
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_alpm_log(PM_LOG_DEBUG, "action: keeping current file and installing new one with .pacnew ending\n");
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snprintf(newpath, PATH_MAX, "%s.pacnew", filename);
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if(_alpm_copyfile(tempfile, newpath)) {
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_alpm_log(PM_LOG_ERROR, _("could not install %s as %s: %s\n"), filename, newpath, strerror(errno));
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alpm_logaction("error: could not install %s as %s: %s\n", filename, newpath, strerror(errno));
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if(rename(checkfile, newpath)) {
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_alpm_log(PM_LOG_ERROR, _("could not install %s as %s (%s)\n"),
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filename, newpath, strerror(errno));
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alpm_logaction("error: could not install %s as %s (%s)\n",
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filename, newpath, strerror(errno));
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} else {
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_alpm_log(PM_LOG_WARNING, _("%s installed as %s\n"), filename, newpath);
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alpm_logaction("warning: %s installed as %s\n", filename, newpath);
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_alpm_log(PM_LOG_WARNING, _("%s installed as %s\n"),
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filename, newpath);
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alpm_logaction("warning: %s installed as %s\n",
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filename, newpath);
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}
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}
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}
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@ -560,9 +566,9 @@ static int extract_single_file(struct archive *archive,
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FREE(hash_local);
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FREE(hash_pkg);
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FREE(hash_orig);
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unlink(tempfile);
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FREE(tempfile);
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} else {
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int ret;
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/* we didn't need a backup */
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if(notouch) {
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/* change the path to a .pacnew extension */
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@ -583,7 +589,7 @@ static int extract_single_file(struct archive *archive,
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archive_entry_set_pathname(entry, filename);
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int ret = archive_read_extract(archive, entry, archive_flags);
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ret = archive_read_extract(archive, entry, archive_flags);
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if(ret == 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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20
pactest/tests/mode003.py
Normal file
20
pactest/tests/mode003.py
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@ -0,0 +1,20 @@
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self.description = "Backup file permissions test (same as orig)"
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lp = pmpkg("filesystem")
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lp.files = ["etc/profile|666"]
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lp.backup = ["etc/profile*"]
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self.addpkg2db("local", lp)
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p = pmpkg("filesystem", "1.0-2")
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p.files = ["etc/profile|666**"]
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p.backup = ["etc/profile"]
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self.addpkg(p)
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self.args = "-U %s" % p.filename()
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self.addrule("PACMAN_RETCODE=0")
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self.addrule("!FILE_PACSAVE=etc/profile")
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self.addrule("FILE_PACNEW=etc/profile")
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self.addrule("FILE_EXIST=etc/profile")
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self.addrule("FILE_MODE=etc/profile|666")
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self.addrule("FILE_MODE=etc/profile.pacnew|666")
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