Initial revision

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: */