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-rw-r--r--lib/libalpm/add.c413
1 files changed, 158 insertions, 255 deletions
diff --git a/lib/libalpm/add.c b/lib/libalpm/add.c
index 725f2b5c..b1245693 100644
--- a/lib/libalpm/add.c
+++ b/lib/libalpm/add.c
@@ -107,7 +107,7 @@ int SYMEXPORT alpm_add_pkg(alpm_handle_t *handle, alpm_pkg_t *pkg)
}
static int perform_extraction(alpm_handle_t *handle, struct archive *archive,
- struct archive_entry *entry, const char *filename, const char *origname)
+ struct archive_entry *entry, const char *filename)
{
int ret;
const int archive_flags = ARCHIVE_EXTRACT_OWNER |
@@ -120,13 +120,13 @@ static int perform_extraction(alpm_handle_t *handle, struct archive *archive,
if(ret == ARCHIVE_WARN && archive_errno(archive) != ENOSPC) {
/* operation succeeded but a "non-critical" error was encountered */
_alpm_log(handle, ALPM_LOG_WARNING, _("warning given when extracting %s (%s)\n"),
- origname, archive_error_string(archive));
+ filename, archive_error_string(archive));
} else if(ret != ARCHIVE_OK) {
_alpm_log(handle, ALPM_LOG_ERROR, _("could not extract %s (%s)\n"),
- origname, archive_error_string(archive));
+ filename, archive_error_string(archive));
alpm_logaction(handle, ALPM_CALLER_PREFIX,
"error: could not extract %s (%s)\n",
- origname, archive_error_string(archive));
+ filename, archive_error_string(archive));
return 1;
}
return 0;
@@ -144,49 +144,59 @@ static int try_rename(alpm_handle_t *handle, const char *src, const char *dest)
return 0;
}
+static int extract_db_file(alpm_handle_t *handle, struct archive *archive,
+ struct archive_entry *entry, alpm_pkg_t *newpkg, const char *entryname)
+{
+ char filename[PATH_MAX]; /* the actual file we're extracting */
+ const char *dbfile;
+ if(strcmp(entryname, ".INSTALL") == 0) {
+ dbfile = "install";
+ } else if(strcmp(entryname, ".CHANGELOG") == 0) {
+ dbfile = "changelog";
+ } else if(strcmp(entryname, ".MTREE") == 0) {
+ dbfile = "mtree";
+ } else if(*entryname == '.') {
+ /* reserve all files starting with '.' for future possibilities */
+ _alpm_log(handle, ALPM_LOG_DEBUG, "skipping extraction of '%s'\n", entryname);
+ archive_read_data_skip(archive);
+ return 0;
+ }
+ archive_entry_set_perm(entry, 0644);
+ snprintf(filename, PATH_MAX, "%s%s-%s/%s",
+ _alpm_db_path(handle->db_local), newpkg->name, newpkg->version, dbfile);
+ return perform_extraction(handle, archive, entry, filename);
+}
+
static int extract_single_file(alpm_handle_t *handle, struct archive *archive,
struct archive_entry *entry, alpm_pkg_t *newpkg, alpm_pkg_t *oldpkg)
{
- const char *entryname;
- mode_t entrymode;
+ const char *entryname = archive_entry_pathname(entry);
+ mode_t entrymode = archive_entry_mode(entry);
+ alpm_backup_t *backup = _alpm_needbackup(entryname, newpkg);
char filename[PATH_MAX]; /* the actual file we're extracting */
int needbackup = 0, notouch = 0;
const char *hash_orig = NULL;
- char *entryname_orig = NULL;
int errors = 0;
+ struct stat lsbuf;
+ size_t filename_len;
- entryname = archive_entry_pathname(entry);
- entrymode = archive_entry_mode(entry);
+ if(*entryname == '.') {
+ return extract_db_file(handle, archive, entry, newpkg, entryname);
+ }
- if(strcmp(entryname, ".INSTALL") == 0) {
- /* the install script goes inside the db */
- snprintf(filename, PATH_MAX, "%s%s-%s/install",
- _alpm_db_path(handle->db_local), newpkg->name, newpkg->version);
- archive_entry_set_perm(entry, 0644);
- } else if(strcmp(entryname, ".CHANGELOG") == 0) {
- /* the changelog goes inside the db */
- snprintf(filename, PATH_MAX, "%s%s-%s/changelog",
- _alpm_db_path(handle->db_local), newpkg->name, newpkg->version);
- archive_entry_set_perm(entry, 0644);
- } else if(strcmp(entryname, ".MTREE") == 0) {
- /* the mtree file goes inside the db */
- snprintf(filename, PATH_MAX, "%s%s-%s/mtree",
- _alpm_db_path(handle->db_local), newpkg->name, newpkg->version);
- archive_entry_set_perm(entry, 0644);
- } else if(*entryname == '.') {
- /* for now, ignore all files starting with '.' that haven't
- * already been handled (for future possibilities) */
- _alpm_log(handle, ALPM_LOG_DEBUG, "skipping extraction of '%s'\n", entryname);
- archive_read_data_skip(archive);
+ if (!alpm_filelist_contains(&newpkg->files, entryname)) {
+ _alpm_log(handle, ALPM_LOG_WARNING,
+ _("file not found in file list for package %s. skipping extraction of %s\n"),
+ newpkg->name, entryname);
return 0;
- } else {
- if (!alpm_filelist_contains(&newpkg->files, entryname)) {
- _alpm_log(handle, ALPM_LOG_WARNING, _("file not found in file list for package %s. skipping extraction of %s\n"),
- newpkg->name, entryname);
- return 0;
- }
- /* build the new entryname relative to handle->root */
- snprintf(filename, PATH_MAX, "%s%s", handle->root, entryname);
+ }
+
+ /* build the new entryname relative to handle->root */
+ filename_len = snprintf(filename, PATH_MAX, "%s%s", handle->root, entryname);
+ if(filename_len >= PATH_MAX) {
+ _alpm_log(handle, ALPM_LOG_ERROR,
+ _("unable to extract %s%s: path too long"), handle->root, entryname);
+ return 1;
}
/* if a file is in NoExtract then we never extract it */
@@ -214,115 +224,116 @@ static int extract_single_file(alpm_handle_t *handle, struct archive *archive,
* 6- skip extraction, dir already exists.
*/
- struct stat lsbuf;
if(llstat(filename, &lsbuf) != 0) {
/* cases 1,2: file doesn't exist, skip all backup checks */
- } else {
- if(S_ISDIR(lsbuf.st_mode)) {
- if(S_ISDIR(entrymode)) {
- uid_t entryuid = archive_entry_uid(entry);
- gid_t entrygid = archive_entry_gid(entry);
-
- /* case 6: existing dir, ignore it */
- if(lsbuf.st_mode != entrymode) {
- /* if filesystem perms are different than pkg perms, warn user */
- mode_t mask = 07777;
- _alpm_log(handle, ALPM_LOG_WARNING, _("directory permissions differ on %s\n"
- "filesystem: %o package: %o\n"), filename, lsbuf.st_mode & mask,
- entrymode & mask);
- alpm_logaction(handle, ALPM_CALLER_PREFIX,
- "warning: directory permissions differ on %s\n"
- "filesystem: %o package: %o\n", filename, lsbuf.st_mode & mask,
- entrymode & mask);
- }
+ } else if(S_ISDIR(lsbuf.st_mode) && S_ISDIR(entrymode)) {
+ uid_t entryuid = archive_entry_uid(entry);
+ gid_t entrygid = archive_entry_gid(entry);
+
+ /* case 6: existing dir, ignore it */
+ if(lsbuf.st_mode != entrymode) {
+ /* if filesystem perms are different than pkg perms, warn user */
+ mode_t mask = 07777;
+ _alpm_log(handle, ALPM_LOG_WARNING, _("directory permissions differ on %s\n"
+ "filesystem: %o package: %o\n"), filename, lsbuf.st_mode & mask,
+ entrymode & mask);
+ alpm_logaction(handle, ALPM_CALLER_PREFIX,
+ "warning: directory permissions differ on %s\n"
+ "filesystem: %o package: %o\n", filename, lsbuf.st_mode & mask,
+ entrymode & mask);
+ }
- if((entryuid != lsbuf.st_uid) || (entrygid != lsbuf.st_gid)) {
- _alpm_log(handle, ALPM_LOG_WARNING, _("directory ownership differs on %s\n"
- "filesystem: %u:%u package: %u:%u\n"), filename,
- lsbuf.st_uid, lsbuf.st_gid, entryuid, entrygid);
- alpm_logaction(handle, ALPM_CALLER_PREFIX,
- "warning: directory ownership differs on %s\n"
- "filesystem: %u:%u package: %u:%u\n", filename,
- lsbuf.st_uid, lsbuf.st_gid, entryuid, entrygid);
- }
+ if((entryuid != lsbuf.st_uid) || (entrygid != lsbuf.st_gid)) {
+ _alpm_log(handle, ALPM_LOG_WARNING, _("directory ownership differs on %s\n"
+ "filesystem: %u:%u package: %u:%u\n"), filename,
+ lsbuf.st_uid, lsbuf.st_gid, entryuid, entrygid);
+ alpm_logaction(handle, ALPM_CALLER_PREFIX,
+ "warning: directory ownership differs on %s\n"
+ "filesystem: %u:%u package: %u:%u\n", filename,
+ lsbuf.st_uid, lsbuf.st_gid, entryuid, entrygid);
+ }
- _alpm_log(handle, ALPM_LOG_DEBUG, "extract: skipping dir extraction of %s\n",
- filename);
- archive_read_data_skip(archive);
- return 0;
- } else {
- /* case 5: trying to overwrite dir with file, don't allow it */
- _alpm_log(handle, ALPM_LOG_ERROR, _("extract: not overwriting dir with file %s\n"),
- filename);
- archive_read_data_skip(archive);
- return 1;
- }
- } else if(S_ISDIR(entrymode)) {
- /* case 4: trying to overwrite file with dir */
- _alpm_log(handle, ALPM_LOG_DEBUG, "extract: overwriting file with dir %s\n",
- filename);
+ _alpm_log(handle, ALPM_LOG_DEBUG, "extract: skipping dir extraction of %s\n",
+ filename);
+ archive_read_data_skip(archive);
+ return 0;
+ } else if(S_ISDIR(lsbuf.st_mode)) {
+ /* case 5: trying to overwrite dir with file, don't allow it */
+ _alpm_log(handle, ALPM_LOG_ERROR, _("extract: not overwriting dir with file %s\n"),
+ filename);
+ archive_read_data_skip(archive);
+ return 1;
+ } else if(S_ISDIR(entrymode)) {
+ /* case 4: trying to overwrite file with dir */
+ _alpm_log(handle, ALPM_LOG_DEBUG, "extract: overwriting file with dir %s\n",
+ filename);
+ } else {
+ /* case 3: trying to overwrite file with file */
+ /* if file is in NoUpgrade, don't touch it */
+ if(_alpm_fnmatch_patterns(handle->noupgrade, entryname) == 0) {
+ notouch = 1;
} else {
- /* case 3: */
- /* if file is in NoUpgrade, don't touch it */
- if(_alpm_fnmatch_patterns(handle->noupgrade, entryname) == 0) {
- notouch = 1;
- } else {
- alpm_backup_t *backup;
- /* go to the backup array and see if our conflict is there */
- /* check newpkg first, so that adding backup files is retroactive */
- backup = _alpm_needbackup(entryname, newpkg);
- if(backup) {
- needbackup = 1;
- }
-
- /* check oldpkg for a backup entry, store the hash if available */
- if(oldpkg) {
- backup = _alpm_needbackup(entryname, oldpkg);
- if(backup) {
- hash_orig = backup->hash;
- needbackup = 1;
- }
- }
+ alpm_backup_t *oldbackup;
+ if(oldpkg && (oldbackup = _alpm_needbackup(entryname, oldpkg))) {
+ hash_orig = oldbackup->hash;
+ needbackup = 1;
+ } else if(backup) {
+ /* allow adding backup files retroactively */
+ needbackup = 1;
}
}
}
- /* we need access to the original entryname later after calls to
- * archive_entry_set_pathname(), so we need to dupe it and free() later */
- STRDUP(entryname_orig, entryname, RET_ERR(handle, ALPM_ERR_MEMORY, -1));
+ if(notouch || needbackup) {
+ if(filename_len + strlen(".pacnew") >= PATH_MAX) {
+ _alpm_log(handle, ALPM_LOG_ERROR,
+ _("unable to extract %s.pacnew: path too long"), filename);
+ return 1;
+ }
+ strcpy(filename + filename_len, ".pacnew");
+ }
- if(needbackup) {
- char *checkfile;
- char *hash_local = NULL, *hash_pkg = NULL;
- size_t len;
+ if(handle->trans->flags & ALPM_TRANS_FLAG_FORCE) {
+ /* if FORCE was used, unlink() each file (whether it's there
+ * or not) before extracting. This prevents the old "Text file busy"
+ * error that crops up if forcing a glibc or pacman upgrade. */
+ unlink(filename);
+ }
+
+ _alpm_log(handle, ALPM_LOG_DEBUG, "extracting %s\n", filename);
+ if(perform_extraction(handle, archive, entry, filename)) {
+ errors++;
+ return errors;
+ }
- len = strlen(filename) + 10;
- MALLOC(checkfile, len,
- errors++; handle->pm_errno = ALPM_ERR_MEMORY; goto needbackup_cleanup);
- snprintf(checkfile, len, "%s.paccheck", filename);
+ if(backup) {
+ FREE(backup->hash);
+ backup->hash = alpm_compute_md5sum(filename);
+ }
- if(perform_extraction(handle, archive, entry, checkfile, entryname_orig)) {
- errors++;
- goto needbackup_cleanup;
- }
+ if(notouch) {
+ alpm_event_pacnew_created_t event = {
+ .type = ALPM_EVENT_PACNEW_CREATED,
+ .from_noupgrade = 1,
+ .oldpkg = oldpkg,
+ .newpkg = newpkg,
+ .file = filename
+ };
+ /* "remove" the .pacnew suffix */
+ filename[filename_len] = '\0';
+ EVENT(handle, &event);
+ alpm_logaction(handle, ALPM_CALLER_PREFIX,
+ "warning: %s installed as %s.pacnew\n", filename, filename);
+ } else if(needbackup) {
+ char *hash_local = NULL, *hash_pkg = NULL;
+ char origfile[PATH_MAX] = "";
- hash_local = alpm_compute_md5sum(filename);
- hash_pkg = alpm_compute_md5sum(checkfile);
+ strncat(origfile, filename, filename_len);
- /* update the md5 hash in newpkg's backup (it will be the new original) */
- alpm_list_t *i;
- for(i = alpm_pkg_get_backup(newpkg); i; i = i->next) {
- alpm_backup_t *backup = i->data;
- char *newhash;
- if(!backup->name || strcmp(backup->name, entryname_orig) != 0) {
- continue;
- }
- STRDUP(newhash, hash_pkg, errors++; handle->pm_errno = ALPM_ERR_MEMORY; goto needbackup_cleanup);
- FREE(backup->hash);
- backup->hash = newhash;
- }
+ hash_local = alpm_compute_md5sum(origfile);
+ hash_pkg = backup ? backup->hash : alpm_compute_md5sum(filename);
- _alpm_log(handle, ALPM_LOG_DEBUG, "checking hashes for %s\n", entryname_orig);
+ _alpm_log(handle, ALPM_LOG_DEBUG, "checking hashes for %s\n", origfile);
_alpm_log(handle, ALPM_LOG_DEBUG, "current: %s\n", hash_local);
_alpm_log(handle, ALPM_LOG_DEBUG, "new: %s\n", hash_pkg);
_alpm_log(handle, ALPM_LOG_DEBUG, "original: %s\n", hash_orig);
@@ -331,8 +342,8 @@ static int extract_single_file(alpm_handle_t *handle, struct archive *archive,
/* local and new files are the same, updating anyway to get
* correct timestamps */
_alpm_log(handle, ALPM_LOG_DEBUG, "action: installing new file: %s\n",
- entryname_orig);
- if(try_rename(handle, checkfile, filename)) {
+ origfile);
+ if(try_rename(handle, filename, origfile)) {
errors++;
}
} else if(hash_orig && hash_pkg && strcmp(hash_orig, hash_pkg) == 0) {
@@ -340,146 +351,38 @@ static int extract_single_file(alpm_handle_t *handle, struct archive *archive,
* including any user changes */
_alpm_log(handle, ALPM_LOG_DEBUG,
"action: leaving existing file in place\n");
- unlink(checkfile);
+ unlink(filename);
} else if(hash_orig && hash_local && strcmp(hash_orig, hash_local) == 0) {
/* installed file has NOT been changed by user,
* update to the new version */
_alpm_log(handle, ALPM_LOG_DEBUG, "action: installing new file: %s\n",
- entryname_orig);
- if(try_rename(handle, checkfile, filename)) {
+ origfile);
+ if(try_rename(handle, filename, origfile)) {
errors++;
}
} else {
- /* none of the three files matched another, unpack the new file alongside
- * the local file */
-
- if(oldpkg) {
- char *newpath;
- size_t newlen = strlen(filename) + strlen(".pacnew") + 1;
-
- _alpm_log(handle, ALPM_LOG_DEBUG,
- "action: keeping current file and installing"
- " new one with .pacnew ending\n");
-
- MALLOC(newpath, newlen,
- errors++; handle->pm_errno = ALPM_ERR_MEMORY; goto needbackup_cleanup);
- snprintf(newpath, newlen, "%s.pacnew", filename);
-
- if(try_rename(handle, checkfile, newpath)) {
- errors++;
- } else {
- alpm_event_pacnew_created_t event = {
- .type = ALPM_EVENT_PACNEW_CREATED,
- .from_noupgrade = 0,
- .oldpkg = oldpkg,
- .newpkg = newpkg,
- .file = filename
- };
- EVENT(handle, &event);
- alpm_logaction(handle, ALPM_CALLER_PREFIX,
- "warning: %s installed as %s\n", filename, newpath);
- }
-
- free(newpath);
- } else {
- char *newpath;
- size_t newlen = strlen(filename) + strlen(".pacorig") + 1;
-
- _alpm_log(handle, ALPM_LOG_DEBUG,
- "action: saving existing file with a .pacorig ending"
- " and installing a new one\n");
-
- MALLOC(newpath, newlen,
- errors++; handle->pm_errno = ALPM_ERR_MEMORY; goto needbackup_cleanup);
- snprintf(newpath, newlen, "%s.pacorig", filename);
-
- /* move the existing file to the "pacorig" */
- if(try_rename(handle, filename, newpath)) {
- errors++; /* failed rename filename -> filename.pacorig */
- errors++; /* failed rename checkfile -> filename */
- } else {
- /* rename the file we extracted to the real name */
- if(try_rename(handle, checkfile, filename)) {
- errors++;
- } else {
- alpm_event_pacorig_created_t event = {
- .type = ALPM_EVENT_PACORIG_CREATED,
- .newpkg = newpkg,
- .file = filename
- };
- EVENT(handle, &event);
- alpm_logaction(handle, ALPM_CALLER_PREFIX,
- "warning: %s saved as %s\n", filename, newpath);
- }
- }
-
- free(newpath);
- }
- }
-
-needbackup_cleanup:
- free(checkfile);
- free(hash_local);
- free(hash_pkg);
- } else {
- size_t len;
- /* we didn't need a backup */
- if(notouch) {
- /* change the path to a .pacnew extension */
- _alpm_log(handle, ALPM_LOG_DEBUG, "%s is in NoUpgrade -- skipping\n", filename);
- /* remember len so we can get the old filename back for the event */
- len = strlen(filename);
- strncat(filename, ".pacnew", PATH_MAX - len);
- } else {
- _alpm_log(handle, ALPM_LOG_DEBUG, "extracting %s\n", filename);
- }
-
- if(handle->trans->flags & ALPM_TRANS_FLAG_FORCE) {
- /* if FORCE was used, unlink() each file (whether it's there
- * or not) before extracting. This prevents the old "Text file busy"
- * error that crops up if forcing a glibc or pacman upgrade. */
- unlink(filename);
- }
-
- if(perform_extraction(handle, archive, entry, filename, entryname_orig)) {
- /* error */
- free(entryname_orig);
- errors++;
- return errors;
- }
-
- if(notouch) {
+ /* none of the three files matched another, leave the unpacked
+ * file alongside the local file */
alpm_event_pacnew_created_t event = {
.type = ALPM_EVENT_PACNEW_CREATED,
- .from_noupgrade = 1,
+ .from_noupgrade = 0,
.oldpkg = oldpkg,
.newpkg = newpkg,
- .file = filename
+ .file = origfile
};
- /* "remove" the .pacnew suffix */
- filename[len] = '\0';
+ _alpm_log(handle, ALPM_LOG_DEBUG,
+ "action: keeping current file and installing"
+ " new one with .pacnew ending\n");
EVENT(handle, &event);
alpm_logaction(handle, ALPM_CALLER_PREFIX,
- "warning: %s installed as %s.pacnew\n", filename, filename);
- /* restore */
- filename[len] = '.';
+ "warning: %s installed as %s\n", origfile, filename);
}
- /* calculate an hash if this is in newpkg's backup */
- alpm_list_t *i;
- for(i = alpm_pkg_get_backup(newpkg); i; i = i->next) {
- alpm_backup_t *backup = i->data;
- char *newhash;
- if(!backup->name || strcmp(backup->name, entryname_orig) != 0) {
- continue;
- }
- _alpm_log(handle, ALPM_LOG_DEBUG, "appending backup entry for %s\n", entryname_orig);
- newhash = alpm_compute_md5sum(filename);
- FREE(backup->hash);
- backup->hash = newhash;
+ free(hash_local);
+ if(!backup) {
+ free(hash_pkg);
}
}
- free(entryname_orig);
return errors;
}

Copyright © 2002-2022 Judd Vinet and Aaron Griffin. Copyright © 2022 Erich Eckner.
The Arch Linux name and logo are recognized trademarks. Some rights reserved. The registered trademark Linux® is used pursuant to a sublicense from LMI, the exclusive licensee of Linus Torvalds, owner of the mark on a world-wide basis.