Implement a -Qt operation in frontend to test the database

After adding a alpm_db_check() operation in the back end, we can call it
in the front end and present a user-friendly interface to it.

Inspired-by: VMiklos <vmiklos@frugalware.org>
Signed-off-by: Dan McGee <dan@archlinux.org>

doc/pacman.8

@@ -157,6 +157,10 @@ useful in combination with \fB--info\fP and \fB--list\fP.
 This will search each locally-installed package for names or descriptions that
 matche \fIregexp\fP.
 .TP
+.B \-t, --test
+Test the consistancy of the local pacman database, and alert you of any
+problems found while searching. Returns 0 on success, >0 otherwise.
+.TP
 .B \-u, --upgrades
 Lists all packages that are out of date on the local system. This option works
 best if the sync database is refreshed using \fB-Sy\fP.

src/pacman/conf.h

@@ -45,6 +45,7 @@ typedef struct __config_t {
 	unsigned short op_q_owns;
 	unsigned short op_q_search;
 	unsigned short op_q_changelog;
+	unsigned short op_q_test;
 	unsigned short op_q_upgrade;
 	unsigned short op_s_clean;
 	unsigned short op_s_dependsonly;

src/pacman/pacman.c

@@ -121,6 +121,7 @@ static void usage(int op, char *myname)
 			printf(_("  -o, --owns <file>    query the package that owns <file>\n"));
 			printf(_("  -p, --file <package> query a package file instead of the database\n"));
 			printf(_("  -s, --search <regex> search locally-installed packages for matching strings\n"));
+			printf(_("  -t, --test           check the consistency of the local database\n"));
 			printf(_("  -u, --upgrades       list all packages that can be upgraded\n"));
 		} else if(op == PM_OP_SYNC) {
 			printf("%s:  %s {-S --sync} [%s] [%s]\n", str_usg, myname, str_opt, str_pkg);
@@ -278,6 +279,7 @@ static int parseargs(int argc, char *argv[])
 		{"root",       required_argument, 0, 'r'},
 		{"recursive",  no_argument,       0, 's'},
 		{"search",     no_argument,       0, 's'},
+		{"test",       no_argument,       0, 't'},
 		{"upgrades",   no_argument,       0, 'u'},
 		{"sysupgrade", no_argument,       0, 'u'},
 		{"verbose",    no_argument,       0, 'v'},
@@ -296,7 +298,7 @@ static int parseargs(int argc, char *argv[])
 	};
 	struct stat st;
 
-	while((opt = getopt_long(argc, argv, "ARUFQSTr:b:vkhscVfmnoldepiuwygz", opts, &option_index))) {
+	while((opt = getopt_long(argc, argv, "ARUFQSTr:b:vkhscVfmnoldepituwygz", opts, &option_index))) {
 		if(opt < 0) {
 			break;
 		}
@@ -402,6 +404,9 @@ static int parseargs(int argc, char *argv[])
 				config->op_q_search = 1;
 				config->flags |= PM_TRANS_FLAG_RECURSE;
 				break;
+			case 't':
+				config->op_q_test = 1;
+				break;
 			case 'u':
 				config->op_s_upgrade = 1;
 				config->op_q_upgrade = 1;

src/pacman/query.c

@@ -257,6 +257,26 @@ int pacman_query(alpm_list_t *targets)
 		return(ret);
 	}
 
+	if(config->op_q_test) {
+		alpm_list_t *testlist;
+		printf(_("Checking database for consistency..."));
+		testlist = alpm_db_test(db_local);
+		if(testlist == NULL) {
+			printf(_("check complete.\n"));
+			return(0);
+		} else {
+			/* on failure, increment the ret val by 1 for each failure */
+			ret = 0;
+			printf(_("check failed!\n"));
+			fflush(stdout);
+			for(i = testlist; i; i = alpm_list_next(i)) {
+				fprintf(stderr, "%s\n", (char*)alpm_list_getdata(i));
+				ret++;
+			}
+			return(ret);
+		}
+	}
+
 	if(config->op_q_foreign) {
 		sync_dbs = alpm_option_get_syncdbs();