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-rw-r--r--lib/libalpm/db.c651
1 files changed, 651 insertions, 0 deletions
diff --git a/lib/libalpm/db.c b/lib/libalpm/db.c
new file mode 100644
index 00000000..3fad4bb6
--- /dev/null
+++ b/lib/libalpm/db.c
@@ -0,0 +1,651 @@
+/*
+ * db.c
+ *
+ * Copyright (c) 2002-2005 by Judd Vinet <jvinet@zeroflux.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+#include "config.h"
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/stat.h>
+/* pacman */
+#include "util.h"
+#include "group.h"
+#include "cache.h"
+#include "db.h"
+
+/* Open a database and return a pmdb_t handle */
+pmdb_t *db_open(char *root, char *dbpath, char *treename)
+{
+ pmdb_t *db;
+
+ if(root == NULL || dbpath == NULL || treename == NULL) {
+ return(NULL);
+ }
+
+ MALLOC(db, sizeof(pmdb_t));
+
+ MALLOC(db->path, strlen(root)+strlen(dbpath)+strlen(treename)+2);
+ sprintf(db->path, "%s%s/%s", root, dbpath, treename);
+
+ db->dir = opendir(db->path);
+ if(db->dir == NULL) {
+ FREE(db->path);
+ FREE(db);
+ return(NULL);
+ }
+
+ strncpy(db->treename, treename, sizeof(db->treename)-1);
+
+ db->pkgcache = NULL;
+ db->grpcache = NULL;
+
+ return(db);
+}
+
+void db_close(pmdb_t *db)
+{
+ if(db == NULL) {
+ return;
+ }
+
+ if(db->dir) {
+ closedir(db->dir);
+ db->dir = NULL;
+ }
+ FREE(db->path);
+
+ db_free_pkgcache(db);
+ db_free_grpcache(db);
+
+ free(db);
+
+ return;
+}
+
+int db_create(char *root, char *dbpath, char *treename)
+{
+ char path[PATH_MAX];
+
+ if(root == NULL || dbpath == NULL || treename == NULL) {
+ return(-1);
+ }
+
+ snprintf(path, PATH_MAX, "%s%s/local", root, dbpath);
+ if(_alpm_makepath(path) != 0) {
+ return(-1);
+ }
+
+ return(0);
+}
+
+void db_rewind(pmdb_t *db)
+{
+ if(db == NULL || db->dir == NULL) {
+ return;
+ }
+
+ rewinddir(db->dir);
+}
+
+pmpkg_t *db_scan(pmdb_t *db, char *target, unsigned int inforeq)
+{
+ struct dirent *ent = NULL;
+ char name[256];
+ char *ptr = NULL;
+ int ret, found = 0;
+ pmpkg_t *pkg;
+
+ if(db == NULL) {
+ return(NULL);
+ }
+
+ if(target != NULL) {
+ /* search for a specific package (by name only) */
+ rewinddir(db->dir);
+ while(!found && (ent = readdir(db->dir)) != NULL) {
+ if(!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..")) {
+ continue;
+ }
+ strncpy(name, ent->d_name, 255);
+ /* truncate the string at the second-to-last hyphen, */
+ /* which will give us the package name */
+ if((ptr = rindex(name, '-'))) {
+ *ptr = '\0';
+ }
+ if((ptr = rindex(name, '-'))) {
+ *ptr = '\0';
+ }
+ if(!strcmp(name, target)) {
+ found = 1;
+ }
+ }
+ if(!found) {
+ return(NULL);
+ }
+ } else {
+ /* normal iteration */
+ ent = readdir(db->dir);
+ if(ent == NULL) {
+ return(NULL);
+ }
+ if(!strcmp(ent->d_name, ".")) {
+ ent = readdir(db->dir);
+ if(ent == NULL) {
+ return(NULL);
+ }
+ }
+ if(!strcmp(ent->d_name, "..")) {
+ ent = readdir(db->dir);
+ if(ent == NULL) {
+ return(NULL);
+ }
+ }
+ }
+
+ pkg = pkg_new();
+ if(pkg == NULL) {
+ return(NULL);
+ }
+ ret = db_read(db, ent->d_name, inforeq, pkg);
+ if(ret == -1) {
+ FREEPKG(pkg);
+ }
+
+ return(ret == 0 ? pkg : NULL);
+}
+
+int db_read(pmdb_t *db, char *name, unsigned int inforeq, pmpkg_t *info)
+{
+ FILE *fp = NULL;
+ struct stat buf;
+ char path[PATH_MAX];
+ char line[512];
+
+ if(db == NULL || name == NULL || info == NULL) {
+ return(-1);
+ }
+
+ snprintf(path, PATH_MAX, "%s/%s", db->path, name);
+ if(stat(path, &buf)) {
+ /* directory doesn't exist or can't be opened */
+ return(-1);
+ }
+
+ /* DESC */
+ if(inforeq & INFRQ_DESC) {
+ snprintf(path, PATH_MAX, "%s/%s/desc", db->path, name);
+ fp = fopen(path, "r");
+ if(fp == NULL) {
+ fprintf(stderr, "error: %s: %s\n", path, strerror(errno));
+ return(-1);
+ }
+ while(!feof(fp)) {
+ if(fgets(line, 256, fp) == NULL) {
+ break;
+ }
+ _alpm_strtrim(line);
+ if(!strcmp(line, "%NAME%")) {
+ if(fgets(info->name, sizeof(info->name), fp) == NULL) {
+ return(-1);
+ }
+ _alpm_strtrim(info->name);
+ } else if(!strcmp(line, "%VERSION%")) {
+ if(fgets(info->version, sizeof(info->version), fp) == NULL) {
+ return(-1);
+ }
+ _alpm_strtrim(info->version);
+ } else if(!strcmp(line, "%DESC%")) {
+ if(fgets(info->desc, sizeof(info->desc), fp) == NULL) {
+ return(-1);
+ }
+ _alpm_strtrim(info->desc);
+ } else if(!strcmp(line, "%GROUPS%")) {
+ while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+ char *s = strdup(line);
+ info->groups = pm_list_add(info->groups, s);
+ }
+ } else if(!strcmp(line, "%URL%")) {
+ if(fgets(info->url, sizeof(info->url), fp) == NULL) {
+ return(-1);
+ }
+ _alpm_strtrim(info->url);
+ } else if(!strcmp(line, "%LICENSE%")) {
+ if(fgets(info->license, sizeof(info->license), fp) == NULL) {
+ return(-1);
+ }
+ _alpm_strtrim(info->license);
+ } else if(!strcmp(line, "%ARCH%")) {
+ if(fgets(info->arch, sizeof(info->arch), fp) == NULL) {
+ return(-1);
+ }
+ _alpm_strtrim(info->arch);
+ } else if(!strcmp(line, "%BUILDDATE%")) {
+ if(fgets(info->builddate, sizeof(info->builddate), fp) == NULL) {
+ return(-1);
+ }
+ _alpm_strtrim(info->builddate);
+ } else if(!strcmp(line, "%INSTALLDATE%")) {
+ if(fgets(info->installdate, sizeof(info->installdate), fp) == NULL) {
+ return(-1);
+ }
+ _alpm_strtrim(info->installdate);
+ } else if(!strcmp(line, "%PACKAGER%")) {
+ if(fgets(info->packager, sizeof(info->packager), fp) == NULL) {
+ return(-1);
+ }
+ _alpm_strtrim(info->packager);
+ } else if(!strcmp(line, "%REASON%")) {
+ char tmp[32];
+ if(fgets(tmp, sizeof(tmp), fp) == NULL) {
+ return(-1);
+ }
+ _alpm_strtrim(tmp);
+ info->reason = atol(tmp);
+ } else if(!strcmp(line, "%SIZE%")) {
+ char tmp[32];
+ if(fgets(tmp, sizeof(tmp), fp) == NULL) {
+ return(-1);
+ }
+ _alpm_strtrim(tmp);
+ info->size = atol(tmp);
+ } else if(!strcmp(line, "%CSIZE%")) {
+ /* NOTE: the CSIZE and SIZE fields both share the "size" field
+ * in the pkginfo_t struct. This can be done b/c CSIZE
+ * is currently only used in sync databases, and SIZE is
+ * only used in local databases.
+ */
+ char tmp[32];
+ if(fgets(tmp, sizeof(tmp), fp) == NULL) {
+ return(-1);
+ }
+ _alpm_strtrim(tmp);
+ info->size = atol(tmp);
+ } else if(!strcmp(line, "%REPLACES%")) {
+ /* the REPLACES tag is special -- it only appears in sync repositories,
+ * not the local one. */
+ while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+ info->replaces = pm_list_add(info->replaces, strdup(line));
+ }
+ } else if(!strcmp(line, "%MD5SUM%")) {
+ /* MD5SUM tag only appears in sync repositories,
+ * not the local one. */
+ if(fgets(info->md5sum, sizeof(info->md5sum), fp) == NULL) {
+ return(-1);
+ }
+ } else if(!strcmp(line, "%FORCE%")) {
+ /* FORCE tag only appears in sync repositories,
+ * not the local one. */
+ info->force = 1;
+ }
+ }
+ fclose(fp);
+ }
+
+ /* FILES */
+ if(inforeq & INFRQ_FILES) {
+ snprintf(path, PATH_MAX, "%s/%s/files", db->path, name);
+ fp = fopen(path, "r");
+ if(fp == NULL) {
+ fprintf(stderr, "error: %s: %s\n", path, strerror(errno));
+ return(-1);
+ }
+ while(fgets(line, 256, fp)) {
+ _alpm_strtrim(line);
+ if(!strcmp(line, "%FILES%")) {
+ while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+ info->files = pm_list_add(info->files, strdup(line));
+ }
+ } else if(!strcmp(line, "%BACKUP%")) {
+ while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+ info->backup = pm_list_add(info->backup, strdup(line));
+ }
+ }
+ }
+ fclose(fp);
+ }
+
+ /* DEPENDS */
+ if(inforeq & INFRQ_DEPENDS) {
+ snprintf(path, PATH_MAX, "%s/%s/depends", db->path, name);
+ fp = fopen(path, "r");
+ if(fp == NULL) {
+ fprintf(stderr, "error: %s: %s\n", path, strerror(errno));
+ return(-1);
+ }
+ while(!feof(fp)) {
+ fgets(line, 255, fp);
+ _alpm_strtrim(line);
+ if(!strcmp(line, "%DEPENDS%")) {
+ while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+ info->depends = pm_list_add(info->depends, strdup(line));
+ }
+ } else if(!strcmp(line, "%REQUIREDBY%")) {
+ while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+ info->requiredby = pm_list_add(info->requiredby, strdup(line));
+ }
+ } else if(!strcmp(line, "%CONFLICTS%")) {
+ while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+ info->conflicts = pm_list_add(info->conflicts, strdup(line));
+ }
+ } else if(!strcmp(line, "%PROVIDES%")) {
+ while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+ info->provides = pm_list_add(info->provides, strdup(line));
+ }
+ }
+ }
+ fclose(fp);
+ }
+
+ /* INSTALL */
+ if(inforeq & INFRQ_SCRIPLET) {
+ snprintf(path, PATH_MAX, "%s/%s/install", db->path, name);
+ if(!stat(path, &buf)) {
+ info->scriptlet = 1;
+ }
+ }
+
+ /* internal */
+ info->infolevel |= inforeq;
+
+ return(0);
+}
+
+int db_write(pmdb_t *db, pmpkg_t *info, unsigned int inforeq)
+{
+ char topdir[PATH_MAX];
+ FILE *fp = NULL;
+ char path[PATH_MAX];
+ mode_t oldmask;
+ PMList *lp = NULL;
+
+ if(db == NULL || info == NULL) {
+ return(-1);
+ }
+
+ snprintf(topdir, PATH_MAX, "%s/%s-%s", db->path,
+ info->name, info->version);
+ oldmask = umask(0000);
+ mkdir(topdir, 0755);
+ /* make sure we have a sane umask */
+ umask(0022);
+
+ /* DESC */
+ if(inforeq & INFRQ_DESC) {
+ snprintf(path, PATH_MAX, "%s/desc", topdir);
+ if((fp = fopen(path, "w")) == NULL) {
+ perror("db_write");
+ umask(oldmask);
+ return(-1);
+ }
+ fputs("%NAME%\n", fp);
+ fprintf(fp, "%s\n\n", info->name);
+ fputs("%VERSION%\n", fp);
+ fprintf(fp, "%s\n\n", info->version);
+ fputs("%DESC%\n", fp);
+ fprintf(fp, "%s\n\n", info->desc);
+ fputs("%GROUPS%\n", fp);
+ for(lp = info->groups; lp; lp = lp->next) {
+ fprintf(fp, "%s\n", (char*)lp->data);
+ }
+ fprintf(fp, "\n");
+ fputs("%URL%\n", fp);
+ fprintf(fp, "%s\n\n", info->url);
+ fputs("%LICENSE%\n", fp);
+ fprintf(fp, "%s\n\n", info->license);
+ fputs("%ARCH%\n", fp);
+ fprintf(fp, "%s\n\n", info->arch);
+ fputs("%BUILDDATE%\n", fp);
+ fprintf(fp, "%s\n\n", info->builddate);
+ fputs("%INSTALLDATE%\n", fp);
+ fprintf(fp, "%s\n\n", info->installdate);
+ fputs("%PACKAGER%\n", fp);
+ fprintf(fp, "%s\n\n", info->packager);
+ fputs("%SIZE%\n", fp);
+ fprintf(fp, "%ld\n\n", info->size);
+ fputs("%REASON%\n", fp);
+ fprintf(fp, "%ld\n\n", info->size);
+ fclose(fp);
+ }
+
+ /* FILES */
+ if(inforeq & INFRQ_FILES) {
+ snprintf(path, PATH_MAX, "%s/files", topdir);
+ if((fp = fopen(path, "w")) == NULL) {
+ perror("db_write");
+ umask(oldmask);
+ return(-1);
+ }
+ fputs("%FILES%\n", fp);
+ for(lp = info->files; lp; lp = lp->next) {
+ fprintf(fp, "%s\n", (char*)lp->data);
+ }
+ fprintf(fp, "\n");
+ fputs("%BACKUP%\n", fp);
+ for(lp = info->backup; lp; lp = lp->next) {
+ fprintf(fp, "%s\n", (char*)lp->data);
+ }
+ fprintf(fp, "\n");
+ fclose(fp);
+ }
+
+ /* DEPENDS */
+ if(inforeq & INFRQ_DEPENDS) {
+ snprintf(path, PATH_MAX, "%s/depends", topdir);
+ if((fp = fopen(path, "w")) == NULL) {
+ perror("db_write");
+ umask(oldmask);
+ return(-1);
+ }
+ fputs("%DEPENDS%\n", fp);
+ for(lp = info->depends; lp; lp = lp->next) {
+ fprintf(fp, "%s\n", (char*)lp->data);
+ }
+ fprintf(fp, "\n");
+ fputs("%REQUIREDBY%\n", fp);
+ for(lp = info->requiredby; lp; lp = lp->next) {
+ fprintf(fp, "%s\n", (char*)lp->data);
+ }
+ fprintf(fp, "\n");
+ fputs("%CONFLICTS%\n", fp);
+ for(lp = info->conflicts; lp; lp = lp->next) {
+ fprintf(fp, "%s\n", (char*)lp->data);
+ }
+ fprintf(fp, "\n");
+ fputs("%PROVIDES%\n", fp);
+ for(lp = info->provides; lp; lp = lp->next) {
+ fprintf(fp, "%s\n", (char*)lp->data);
+ }
+ fprintf(fp, "\n");
+ fclose(fp);
+ }
+
+ /* INSTALL */
+ /* nothing needed here (script is automatically extracted) */
+
+ umask(oldmask);
+
+ return(0);
+}
+
+int db_remove(pmdb_t *db, pmpkg_t *info)
+{
+ char topdir[PATH_MAX];
+ char file[PATH_MAX];
+
+ if(db == NULL || info == NULL) {
+ return(-1);
+ }
+
+ snprintf(topdir, PATH_MAX, "%s/%s-%s", db->path, info->name, info->version);
+
+ /* DESC */
+ snprintf(file, PATH_MAX, "%s/desc", topdir);
+ unlink(file);
+ /* FILES */
+ snprintf(file, PATH_MAX, "%s/files", topdir);
+ unlink(file);
+ /* DEPENDS */
+ snprintf(file, PATH_MAX, "%s/depends", topdir);
+ unlink(file);
+ /* INSTALL */
+ snprintf(file, PATH_MAX, "%s/install", topdir);
+ unlink(file);
+ /* Package directory */
+ if(rmdir(topdir) == -1) {
+ return(-1);
+ }
+
+ return(0);
+}
+
+PMList *db_find_conflicts(pmdb_t *db, PMList *targets, char *root)
+{
+ PMList *i, *j, *k;
+ char *filestr = NULL;
+ char path[PATH_MAX+1];
+ char *str = NULL;
+ struct stat buf, buf2;
+ PMList *conflicts = NULL;
+
+ if(db == NULL || targets == NULL || root == NULL) {
+ return(NULL);
+ }
+
+ /* CHECK 1: check every db package against every target package */
+ /* XXX: I've disabled the database-against-targets check for now, as the
+ * many many strcmp() calls slow it down heavily and most of the
+ * checking is redundant to the targets-against-filesystem check.
+ * This will be re-enabled if I can improve performance significantly.
+ *
+ pmpkg_t *info = NULL;
+ char *dbstr = NULL;
+ rewinddir(db->dir);
+ while((info = db_scan(db, NULL, INFRQ_DESC | INFRQ_FILES)) != NULL) {
+ for(i = info->files; i; i = i->next) {
+ if(i->data == NULL) continue;
+ dbstr = (char*)i->data;
+ for(j = targets; j; j = j->next) {
+ pmpkg_t *targ = (pmpkg_t*)j->data;
+ if(strcmp(info->name, targ->name)) {
+ for(k = targ->files; k; k = k->next) {
+ filestr = (char*)k->data;
+ if(!strcmp(dbstr, filestr)) {
+ if(rindex(k->data, '/') == filestr+strlen(filestr)-1) {
+ continue;
+ }
+ MALLOC(str, 512);
+ snprintf(str, 512, "%s: exists in \"%s\" (target) and \"%s\" (installed)", dbstr,
+ targ->name, info->name);
+ conflicts = pm_list_add(conflicts, str);
+ }
+ }
+ }
+ }
+ }
+ }*/
+
+ /* CHECK 2: check every target against every target */
+ for(i = targets; i; i = i->next) {
+ pmpkg_t *p1 = (pmpkg_t*)i->data;
+ for(j = i; j; j = j->next) {
+ pmpkg_t *p2 = (pmpkg_t*)j->data;
+ if(strcmp(p1->name, p2->name)) {
+ for(k = p1->files; k; k = k->next) {
+ filestr = k->data;
+ if(!strcmp(filestr, "._install") || !strcmp(filestr, ".INSTALL")) {
+ continue;
+ }
+ if(rindex(filestr, '/') == filestr+strlen(filestr)-1) {
+ /* this filename has a trailing '/', so it's a directory -- skip it. */
+ continue;
+ }
+ if(pm_list_is_strin(filestr, p2->files)) {
+ MALLOC(str, 512);
+ snprintf(str, 512, "%s: exists in \"%s\" (target) and \"%s\" (target)",
+ filestr, p1->name, p2->name);
+ conflicts = pm_list_add(conflicts, str);
+ }
+ }
+ }
+ }
+ }
+
+ /* CHECK 3: check every target against the filesystem */
+ for(i = targets; i; i = i->next) {
+ pmpkg_t *p = (pmpkg_t*)i->data;
+ pmpkg_t *dbpkg = NULL;
+ for(j = p->files; j; j = j->next) {
+ filestr = (char*)j->data;
+ snprintf(path, PATH_MAX, "%s%s", root, filestr);
+ if(!stat(path, &buf) && !S_ISDIR(buf.st_mode)) {
+ int ok = 0;
+ if(dbpkg == NULL) {
+ dbpkg = db_scan(db, p->name, INFRQ_DESC | INFRQ_FILES);
+ }
+ if(dbpkg && pm_list_is_strin(j->data, dbpkg->files)) {
+ ok = 1;
+ }
+ /* Make sure that the supposedly-conflicting file is not actually just
+ * a symlink that points to a path that used to exist in the package.
+ */
+ /* Check if any part of the conflicting file's path is a symlink */
+ if(dbpkg && !ok) {
+ char str[PATH_MAX];
+ for(k = dbpkg->files; k; k = k->next) {
+ snprintf(str, PATH_MAX, "%s%s", root, (char*)k->data);
+ stat(str, &buf2);
+ if(buf.st_ino == buf2.st_ino) {
+ ok = 1;
+ }
+ }
+ }
+ /* Check if the conflicting file has been moved to another package/target */
+ if(!ok) {
+ /* Look at all the targets */
+ for(k = targets; k && !ok; k = k->next) {
+ pmpkg_t *p1 = (pmpkg_t *)k->data;
+ /* As long as they're not the current package */
+ if(strcmp(p1->name, p->name)) {
+ pmpkg_t *dbpkg2 = NULL;
+ dbpkg2 = db_scan(db, p1->name, INFRQ_DESC | INFRQ_FILES);
+ /* If it used to exist in there, but doesn't anymore */
+ if(dbpkg2 && !pm_list_is_strin(filestr, p1->files) && pm_list_is_strin(filestr, dbpkg2->files)) {
+ ok = 1;
+ }
+ FREEPKG(dbpkg2);
+ }
+ }
+ }
+ if(!ok) {
+ MALLOC(str, 512);
+ snprintf(str, 512, "%s: exists in filesystem", path);
+ conflicts = pm_list_add(conflicts, str);
+ }
+ }
+ }
+ FREEPKG(dbpkg);
+ }
+
+ return(conflicts);
+}
+
+/* vim: set ts=2 sw=2 noet: */

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.