reworked the db object to prepare future integration with different backends

1 files changed, 586 insertions, 0 deletions

diff --git a/lib/libalpm/be_files.c b/lib/libalpm/be_files.c
new file mode 100644
index 00000000..fd675c31
--- /dev/null
+++ b/lib/libalpm/be_files.c
@@ -0,0 +1,586 @@
+/*
+ *  be_files.c
+ * 
+ *  Copyright (c) 2002-2006 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>
+#include <dirent.h>
+#ifdef CYGWIN
+#include <limits.h> /* PATH_MAX */
+#endif
+/* pacman */
+#include "log.h"
+#include "util.h"
+#include "db.h"
+#include "alpm.h"
+
+int _alpm_db_open(pmdb_t *db, int mode)
+{
+	char path[PATH_MAX];
+
+	if(db == NULL) {
+		return(-1);
+	}
+
+	snprintf(path, PATH_MAX, "%s/%s", db->path, db->treename);
+	
+	db->handle = opendir(path);
+	if(db->handle == NULL) {
+		if(mode & DB_O_CREATE) {
+			_alpm_log(PM_LOG_WARNING, "could not open database '%s' -- try creating it", db->treename);
+			_alpm_log(PM_LOG_DEBUG, "creating database '%s'", db->treename);
+			if(mkdir(path, 0755) == 0) {
+				db->handle = opendir(path);
+			}
+		}
+		if(!(mode & DB_O_CREATE) || db->handle == NULL) {
+			return(-1);
+		}
+	}
+
+	return(0);
+}
+
+void _alpm_db_close(pmdb_t *db)
+{
+	if(db == NULL) {
+		return;
+	}
+
+	if(db->handle) {
+		closedir(db->handle);
+		db->handle = NULL;
+	}
+}
+
+void _alpm_db_rewind(pmdb_t *db)
+{
+	if(db == NULL || db->handle == NULL) {
+		return;
+	}
+
+	rewinddir(db->handle);
+}
+
+pmpkg_t *_alpm_db_scan(pmdb_t *db, char *target, unsigned int inforeq)
+{
+	struct dirent *ent = NULL;
+	struct stat sbuf;
+	char path[PATH_MAX];
+	char name[PKG_FULLNAME_LEN];
+	char *ptr = NULL;
+	int found = 0;
+	pmpkg_t *pkg;
+
+	if(db == NULL) {
+		return(NULL);
+	}
+
+	if(target != NULL) {
+		/* search for a specific package (by name only) */
+		rewinddir(db->handle);
+		while(!found && (ent = readdir(db->handle)) != NULL) {
+			if(!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..")) {
+				continue;
+			}
+			/* stat the entry, make sure it's a directory */
+			snprintf(path, PATH_MAX, "%s/%s/%s", db->path, db->treename, ent->d_name);
+			if(stat(path, &sbuf) || !S_ISDIR(sbuf.st_mode)) {
+				continue;
+			}
+			STRNCPY(name, ent->d_name, PKG_FULLNAME_LEN);
+			/* 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 */
+		int isdir = 0;
+		while(!isdir) {
+			ent = readdir(db->handle);
+			if(ent == NULL) {
+				return(NULL);
+			}
+			if(!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..")) {
+				isdir = 0;
+				continue;
+			}
+			/* stat the entry, make sure it's a directory */
+			snprintf(path, PATH_MAX, "%s/%s/%s", db->path, db->treename, ent->d_name);
+			if(!stat(path, &sbuf) && S_ISDIR(sbuf.st_mode)) {
+				isdir = 1;
+			}
+		}
+	}
+
+	pkg = _alpm_pkg_new(NULL, NULL);
+	if(pkg == NULL) {
+		return(NULL);
+	}
+	if(_alpm_pkg_splitname(ent->d_name, pkg->name, pkg->version) == -1) {
+		_alpm_log(PM_LOG_ERROR, "invalid name for dabatase entry '%s'", ent->d_name);
+		return(NULL);
+	}
+	if(_alpm_db_read(db, inforeq, pkg) == -1) {
+		FREEPKG(pkg);
+	}
+
+	return(pkg);
+}
+
+int _alpm_db_read(pmdb_t *db, unsigned int inforeq, pmpkg_t *info)
+{
+	FILE *fp = NULL;
+	struct stat buf;
+	char path[PATH_MAX];
+	char line[512];
+
+	if(db == NULL || info == NULL || info->name[0] == 0 || info->version[0] == 0) {
+		return(-1);
+	}
+
+	snprintf(path, PATH_MAX, "%s/%s/%s-%s", db->path, db->treename, info->name, info->version);
+	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/%s-%s/desc", db->path, db->treename, info->name, info->version);
+		fp = fopen(path, "r");
+		if(fp == NULL) {
+			_alpm_log(PM_LOG_ERROR, "%s (%s)", path, strerror(errno));
+			goto error;
+		}
+		while(!feof(fp)) {
+			if(fgets(line, 256, fp) == NULL) {
+				break;
+			}
+			_alpm_strtrim(line);
+			if(!strcmp(line, "%DESC%")) {
+				if(fgets(info->desc, sizeof(info->desc), fp) == NULL) {
+					goto error;
+				}
+				_alpm_strtrim(info->desc);
+			} else if(!strcmp(line, "%GROUPS%")) {
+				while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+					info->groups = _alpm_list_add(info->groups, strdup(line));
+				}
+			} else if(!strcmp(line, "%URL%")) {
+				if(fgets(info->url, sizeof(info->url), fp) == NULL) {
+					goto error;
+				}
+				_alpm_strtrim(info->url);
+			} else if(!strcmp(line, "%LICENSE%")) {
+				while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+					info->license = _alpm_list_add(info->license, strdup(line));
+				}
+			} else if(!strcmp(line, "%ARCH%")) {
+				if(fgets(info->arch, sizeof(info->arch), fp) == NULL) {
+					goto error;
+				}
+				_alpm_strtrim(info->arch);
+			} else if(!strcmp(line, "%BUILDDATE%")) {
+				if(fgets(info->builddate, sizeof(info->builddate), fp) == NULL) {
+					goto error;
+				}
+				_alpm_strtrim(info->builddate);
+			} else if(!strcmp(line, "%INSTALLDATE%")) {
+				if(fgets(info->installdate, sizeof(info->installdate), fp) == NULL) {
+					goto error;
+				}
+				_alpm_strtrim(info->installdate);
+			} else if(!strcmp(line, "%PACKAGER%")) {
+				if(fgets(info->packager, sizeof(info->packager), fp) == NULL) {
+					goto error;
+				}
+				_alpm_strtrim(info->packager);
+			} else if(!strcmp(line, "%REASON%")) {
+				char tmp[32];
+				if(fgets(tmp, sizeof(tmp), fp) == NULL) {
+					goto error;
+				}
+				_alpm_strtrim(tmp);
+				info->reason = atol(tmp);
+			} else if(!strcmp(line, "%SIZE%") || !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) {
+					goto error;
+				}
+				_alpm_strtrim(tmp);
+				info->size = atol(tmp);
+			} 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) {
+					goto error;
+				}
+			/* XXX: these are only here as backwards-compatibility for pacman 2.x
+			 * sync repos.... in pacman3, they have been moved to DEPENDS.
+			 * Remove this when we move to pacman3 repos.
+			 */
+			} 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 = _alpm_list_add(info->replaces, strdup(line));
+				}
+			} else if(!strcmp(line, "%FORCE%")) {
+				/* FORCE tag only appears in sync repositories,
+				 * not the local one. */
+				info->force = 1;
+			}
+		}
+		fclose(fp);
+		fp = NULL;
+	}
+
+	/* FILES */
+	if(inforeq & INFRQ_FILES) {
+		snprintf(path, PATH_MAX, "%s/%s/%s-%s/files", db->path, db->treename, info->name, info->version);
+		fp = fopen(path, "r");
+		if(fp == NULL) {
+			_alpm_log(PM_LOG_ERROR, "%s (%s)", path, strerror(errno));
+			goto error;
+		}
+		while(fgets(line, 256, fp)) {
+			_alpm_strtrim(line);
+			if(!strcmp(line, "%FILES%")) {
+				while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+					info->files = _alpm_list_add(info->files, strdup(line));
+				}
+			} else if(!strcmp(line, "%BACKUP%")) {
+				while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+					info->backup = _alpm_list_add(info->backup, strdup(line));
+				}
+			}
+		}
+		fclose(fp);
+		fp = NULL;
+	}
+
+	/* DEPENDS */
+	if(inforeq & INFRQ_DEPENDS) {
+		snprintf(path, PATH_MAX, "%s/%s/%s-%s/depends", db->path, db->treename, info->name, info->version);
+		fp = fopen(path, "r");
+		if(fp == NULL) {
+			_alpm_log(PM_LOG_ERROR, "%s (%s)", path, strerror(errno));
+			goto error;
+		}
+		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 = _alpm_list_add(info->depends, strdup(line));
+				}
+			} else if(!strcmp(line, "%REQUIREDBY%")) {
+				while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+					info->requiredby = _alpm_list_add(info->requiredby, strdup(line));
+				}
+			} else if(!strcmp(line, "%CONFLICTS%")) {
+				while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+					info->conflicts = _alpm_list_add(info->conflicts, strdup(line));
+				}
+			} else if(!strcmp(line, "%PROVIDES%")) {
+				while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
+					info->provides = _alpm_list_add(info->provides, strdup(line));
+				}
+			} 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 = _alpm_list_add(info->replaces, strdup(line));
+				}
+			} else if(!strcmp(line, "%FORCE%")) {
+				/* FORCE tag only appears in sync repositories,
+				 * not the local one. */
+				info->force = 1;
+			}
+		}
+		fclose(fp);
+		fp = NULL;
+	}
+
+	/* INSTALL */
+	if(inforeq & INFRQ_SCRIPLET) {
+		snprintf(path, PATH_MAX, "%s/%s/%s-%s/install", db->path, db->treename, info->name, info->version);
+		if(!stat(path, &buf)) {
+			info->scriptlet = 1;
+		}
+	}
+
+	/* internal */
+	info->infolevel |= inforeq;
+
+	return(0);
+
+error:
+	if(fp) {
+		fclose(fp);
+	}
+	return(-1);
+}
+
+int _alpm_db_write(pmdb_t *db, pmpkg_t *info, unsigned int inforeq)
+{
+	FILE *fp = NULL;
+	char path[PATH_MAX];
+	mode_t oldmask;
+	PMList *lp = NULL;
+	int retval = 0;
+	int local = 0;
+
+	if(db == NULL || info == NULL) {
+		return(-1);
+	}
+
+	snprintf(path, PATH_MAX, "%s/%s/%s-%s", db->path, db->treename, info->name, info->version);
+	oldmask = umask(0000);
+	mkdir(path, 0755);
+	/* make sure we have a sane umask */
+	umask(0022);
+
+	if(strcmp(db->treename, "local") == 0) {
+		local = 1;
+	}
+
+	/* DESC */
+	if(inforeq & INFRQ_DESC) {
+		snprintf(path, PATH_MAX, "%s/%s/%s-%s/desc", db->path, db->treename, info->name, info->version);
+		if((fp = fopen(path, "w")) == NULL) {
+			_alpm_log(PM_LOG_ERROR, "db_write: could not open file %s/desc", db->treename);
+			retval = 1;
+			goto cleanup;
+		}
+		fprintf(fp, "%%NAME%%\n%s\n\n"
+			"%%VERSION%%\n%s\n\n", info->name, info->version);
+		if(info->desc[0]) {
+			fprintf(fp, "%%DESC%%\n"
+				"%s\n\n", info->desc);
+		}
+		if(info->groups) {
+			fputs("%GROUPS%\n", fp);
+			for(lp = info->groups; lp; lp = lp->next) {
+				fprintf(fp, "%s\n", (char *)lp->data);
+			}
+			fprintf(fp, "\n");
+		}
+		if(local) {
+			if(info->url[0]) {
+				fprintf(fp, "%%URL%%\n"
+					"%s\n\n", info->url);
+			}
+			if(info->license) {
+				fputs("%LICENSE%\n", fp);
+				for(lp = info->license; lp; lp = lp->next) {
+					fprintf(fp, "%s\n", (char *)lp->data);
+				}
+				fprintf(fp, "\n");
+			}
+			if(info->arch[0]) {
+				fprintf(fp, "%%ARCH%%\n"
+					"%s\n\n", info->arch);
+			}
+			if(info->builddate[0]) {
+				fprintf(fp, "%%BUILDDATE%%\n"
+					"%s\n\n", info->builddate);
+			}
+			if(info->installdate[0]) {
+				fprintf(fp, "%%INSTALLDATE%%\n"
+					"%s\n\n", info->installdate);
+			}
+			if(info->packager[0]) {
+				fprintf(fp, "%%PACKAGER%%\n"
+					"%s\n\n", info->packager);
+			}
+			if(info->size) {
+				fprintf(fp, "%%SIZE%%\n"
+					"%ld\n\n", info->size);
+			}
+			if(info->reason) {
+				fprintf(fp, "%%REASON%%\n"
+					"%d\n\n", info->reason);
+			}
+		} else {
+			if(info->size) {
+				fprintf(fp, "%%CSIZE%%\n"
+					"%ld\n\n", info->size);
+			}
+			if(info->reason) {
+				fprintf(fp, "%%MD5SUM%%\n"
+					"%s\n\n", info->md5sum);
+			}
+		}
+		fclose(fp);
+		fp = NULL;
+	}
+
+	/* FILES */
+	if(local && (inforeq & INFRQ_FILES)) {
+		snprintf(path, PATH_MAX, "%s/%s/%s-%s/files", db->path, db->treename, info->name, info->version);
+		if((fp = fopen(path, "w")) == NULL) {
+			_alpm_log(PM_LOG_ERROR, "db_write: could not open file %s/files", db->treename);
+			retval = -1;
+			goto cleanup;
+		}
+		if(info->files) {
+			fprintf(fp, "%%FILES%%\n");
+			for(lp = info->files; lp; lp = lp->next) {
+				fprintf(fp, "%s\n", (char *)lp->data);
+			}
+			fprintf(fp, "\n");
+		}
+		if(info->backup) {
+			fprintf(fp, "%%BACKUP%%\n");
+			for(lp = info->backup; lp; lp = lp->next) {
+				fprintf(fp, "%s\n", (char *)lp->data);
+			}
+			fprintf(fp, "\n");
+		}
+		fclose(fp);
+		fp = NULL;
+	}
+
+	/* DEPENDS */
+	if(inforeq & INFRQ_DEPENDS) {
+		snprintf(path, PATH_MAX, "%s/%s/%s-%s/depends", db->path, db->treename, info->name, info->version);
+		if((fp = fopen(path, "w")) == NULL) {
+			_alpm_log(PM_LOG_ERROR, "db_write: could not open file %s/depends", db->treename);
+			retval = -1;
+			goto cleanup;
+		}
+		if(info->depends) {
+			fputs("%DEPENDS%\n", fp);
+			for(lp = info->depends; lp; lp = lp->next) {
+				fprintf(fp, "%s\n", (char *)lp->data);
+			}
+			fprintf(fp, "\n");
+		}
+		if(local && info->requiredby) {
+			fputs("%REQUIREDBY%\n", fp);
+			for(lp = info->requiredby; lp; lp = lp->next) {
+				fprintf(fp, "%s\n", (char *)lp->data);
+			}
+			fprintf(fp, "\n");
+		}
+		if(info->conflicts) {
+			fputs("%CONFLICTS%\n", fp);
+			for(lp = info->conflicts; lp; lp = lp->next) {
+				fprintf(fp, "%s\n", (char *)lp->data);
+			}
+			fprintf(fp, "\n");
+		}
+		if(info->provides) {
+			fputs("%PROVIDES%\n", fp);
+			for(lp = info->provides; lp; lp = lp->next) {
+				fprintf(fp, "%s\n", (char *)lp->data);
+			}
+			fprintf(fp, "\n");
+		}
+		if(!local) {
+			if(info->replaces) {
+				fputs("%REPLACES%\n", fp);
+				for(lp = info->replaces; lp; lp = lp->next) {
+					fprintf(fp, "%s\n", (char *)lp->data);
+				}
+				fprintf(fp, "\n");
+			}
+			if(info->force) {
+				fprintf(fp, "%%FORCE%%\n"
+					"\n");
+			}
+		}
+		fclose(fp);
+		fp = NULL;
+	}
+
+	/* INSTALL */
+	/* nothing needed here (script is automatically extracted) */
+
+cleanup:
+	umask(oldmask);
+
+	if(fp) {
+		fclose(fp);
+	}
+
+	return(retval);
+}
+
+int _alpm_db_remove(pmdb_t *db, pmpkg_t *info)
+{
+	char path[PATH_MAX];
+
+	if(db == NULL || info == NULL) {
+		return(-1);
+	}
+
+
+	/* DESC */
+	snprintf(path, PATH_MAX, "%s/%s/%s-%s/desc",
+	                         db->path, db->treename, info->name, info->version);
+	unlink(path);
+	/* FILES */
+	snprintf(path, PATH_MAX, "%s/%s/%s-%s/files",
+	                         db->path, db->treename, info->name, info->version);
+	unlink(path);
+	/* DEPENDS */
+	snprintf(path, PATH_MAX, "%s/%s/%s-%s/depends",
+	                         db->path, db->treename, info->name, info->version);
+	unlink(path);
+	/* INSTALL */
+	snprintf(path, PATH_MAX, "%s/%s/%s-%s/install",
+	                         db->path, db->treename, info->name, info->version);
+	unlink(path);
+
+	/* Package directory */
+	snprintf(path, PATH_MAX, "%s/%s/%s-%s",
+	                         db->path, db->treename, info->name, info->version);
+	if(rmdir(path) == -1) {
+		return(-1);
+	}
+
+	return(0);
+}
+
+/* vim: set ts=2 sw=2 noet: */