rpm: make rpm -i SRPM.rpm install it to surrent dir; better help text

function                                             old     new   delta
rpm_main                                            1355    1358      +3
packed_usage                                       26732   26728      -4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 3/-4)               Total: -1 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

2 files changed, 17 insertions, 9 deletions

diff --git a/archival/rpm.c b/archival/rpm.c
index 77679c2..38ec20e 100644
--- a/archival/rpm.c
+++ b/archival/rpm.c
@@ -71,7 +71,7 @@ static void *map;
 static rpm_index **mytags;
 static int tagcount;
 
-static void extract_cpio_gz(int fd);
+static void extract_cpio(int fd, const char *source_rpm);
 static rpm_index **rpm_gettags(int fd, int *num_tags);
 static int bsearch_rpmtag(const void *key, const void *item);
 static char *rpm_getstr(int tag, int itemindex);
@@ -122,6 +122,8 @@ int rpm_main(int argc, char **argv)
 	}
 
 	while (*argv) {
+		const char *source_rpm;
+
 		rpm_fd = xopen(*argv++, O_RDONLY);
 		mytags = rpm_gettags(rpm_fd, &tagcount);
 		if (!mytags)
@@ -130,11 +132,13 @@ int rpm_main(int argc, char **argv)
 		/* Mimimum is one page */
 		map = mmap(0, offset > pagesize ? (offset + offset % pagesize) : pagesize, PROT_READ, MAP_PRIVATE, rpm_fd, 0);
 
+		source_rpm = rpm_getstr(TAG_SOURCERPM, 0);
+
 		if (func & rpm_install) {
 			/* Backup any config files */
 			loop_through_files(TAG_BASENAMES, fileaction_dobackup);
 			/* Extact the archive */
-			extract_cpio_gz(rpm_fd);
+			extract_cpio(rpm_fd, source_rpm);
 			/* Set the correct file uid/gid's */
 			loop_through_files(TAG_BASENAMES, fileaction_setowngrp);
 		}
@@ -161,7 +165,7 @@ int rpm_main(int argc, char **argv)
 				strftime(bdatestring, 50, "%a %d %b %Y %T %Z", bdate_ptm);
 				printf("Release     : %-30sBuild Date: %s\n", rpm_getstr(TAG_RELEASE, 0), bdatestring);
 				printf("Install date: %-30sBuild Host: %s\n", "(not installed)", rpm_getstr(TAG_BUILDHOST, 0));
-				printf("Group       : %-30sSource RPM: %s\n", rpm_getstr(TAG_GROUP, 0), rpm_getstr(TAG_SOURCERPM, 0));
+				printf("Group       : %-30sSource RPM: %s\n", rpm_getstr(TAG_GROUP, 0), source_rpm);
 				printf("Size        : %-33dLicense: %s\n", rpm_getint(TAG_SIZE, 0), rpm_getstr(TAG_LICENSE, 0));
 				printf("URL         : %s\n", rpm_getstr(TAG_URL, 0));
 				printf("Summary     : %s\n", rpm_getstr(TAG_SUMMARY, 0));
@@ -194,10 +198,15 @@ int rpm_main(int argc, char **argv)
 	return 0;
 }
 
-static void extract_cpio_gz(int fd)
+static void extract_cpio(int fd, const char *source_rpm)
 {
 	archive_handle_t *archive_handle;
 
+	if (source_rpm != NULL) {
+		/* Binary rpm (it was built from some SRPM), install to root */
+		xchdir("/");
+	} /* else: SRPM, install to current dir */
+
 	/* Initialize */
 	archive_handle = init_handle();
 	archive_handle->seek = seek_by_read;
@@ -215,7 +224,6 @@ static void extract_cpio_gz(int fd)
 	archive_handle->src_fd = fd;
 	/*archive_handle->offset = 0; - init_handle() did it */
 
-	xchdir("/"); /* Install RPM's to root */
 	setup_unzip_on_fd(archive_handle->src_fd /*, fail_if_not_detected: 1*/);
 	while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
 		continue;
diff --git a/include/usage.h b/include/usage.h
index 636d019..d619d9e 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -3810,13 +3810,13 @@
      "\n	-A inet" IF_FEATURE_IPV6("{6}") "	Select address family" \
 
 #define rpm_trivial_usage \
-       "-i -q[ildc]p PACKAGE.rpm"
+       "-i PACKAGE.rpm; rpm -qp[ildc] PACKAGE.rpm"
 #define rpm_full_usage "\n\n" \
        "Manipulate RPM packages\n" \
-     "\nOptions:" \
+     "\nCommands:" \
      "\n	-i	Install package" \
-     "\n	-q	Query package" \
-     "\n	-p	Query uninstalled package" \
+     "\n	-qp	Query package" \
+     "\nOptions:" \
      "\n	-i	Show information" \
      "\n	-l	List contents" \
      "\n	-d	List documents" \