rpm: reformat. was really hard to read

1 files changed, 168 insertions, 121 deletions

diff --git a/archival/rpm.c b/archival/rpm.c
index 2ef7232..c0a1dee 100644
--- a/archival/rpm.c
+++ b/archival/rpm.c
@@ -10,44 +10,44 @@
 #include "busybox.h"
 #include "unarchive.h"
 
-#define RPM_HEADER_MAGIC "\216\255\350"
-#define RPM_CHAR_TYPE		1
-#define RPM_INT8_TYPE		2
-#define RPM_INT16_TYPE		3
-#define RPM_INT32_TYPE		4
-/* #define RPM_INT64_TYPE	5   ---- These aren't supported (yet) */
-#define RPM_STRING_TYPE		6
-#define RPM_BIN_TYPE		7
-#define RPM_STRING_ARRAY_TYPE	8
-#define RPM_I18NSTRING_TYPE	9
+#define RPM_HEADER_MAGIC        "\216\255\350"
+#define RPM_CHAR_TYPE           1
+#define RPM_INT8_TYPE           2
+#define RPM_INT16_TYPE          3
+#define RPM_INT32_TYPE          4
+/* #define RPM_INT64_TYPE       5   ---- These aren't supported (yet) */
+#define RPM_STRING_TYPE         6
+#define RPM_BIN_TYPE            7
+#define RPM_STRING_ARRAY_TYPE   8
+#define RPM_I18NSTRING_TYPE     9
 
-#define	RPMTAG_NAME				1000
-#define	RPMTAG_VERSION			1001
-#define	RPMTAG_RELEASE			1002
-#define	RPMTAG_SUMMARY			1004
-#define	RPMTAG_DESCRIPTION		1005
-#define	RPMTAG_BUILDTIME		1006
-#define	RPMTAG_BUILDHOST		1007
-#define	RPMTAG_SIZE			1009
-#define	RPMTAG_VENDOR			1011
-#define	RPMTAG_LICENSE			1014
-#define	RPMTAG_PACKAGER			1015
-#define	RPMTAG_GROUP			1016
-#define RPMTAG_URL			1020
-#define	RPMTAG_PREIN			1023
-#define	RPMTAG_POSTIN			1024
-#define	RPMTAG_FILEFLAGS		1037
-#define	RPMTAG_FILEUSERNAME		1039
-#define	RPMTAG_FILEGROUPNAME		1040
-#define	RPMTAG_SOURCERPM		1044
-#define	RPMTAG_PREINPROG		1085
-#define	RPMTAG_POSTINPROG		1086
-#define	RPMTAG_PREFIXS			1098
-#define	RPMTAG_DIRINDEXES		1116
-#define	RPMTAG_BASENAMES		1117
-#define	RPMTAG_DIRNAMES			1118
-#define	RPMFILE_CONFIG			(1 << 0)
-#define	RPMFILE_DOC			(1 << 1)
+#define TAG_NAME                1000
+#define TAG_VERSION             1001
+#define TAG_RELEASE             1002
+#define TAG_SUMMARY             1004
+#define TAG_DESCRIPTION         1005
+#define TAG_BUILDTIME           1006
+#define TAG_BUILDHOST           1007
+#define TAG_SIZE                1009
+#define TAG_VENDOR              1011
+#define TAG_LICENSE             1014
+#define TAG_PACKAGER            1015
+#define TAG_GROUP               1016
+#define TAG_URL                 1020
+#define TAG_PREIN               1023
+#define TAG_POSTIN              1024
+#define TAG_FILEFLAGS           1037
+#define TAG_FILEUSERNAME        1039
+#define TAG_FILEGROUPNAME       1040
+#define TAG_SOURCERPM           1044
+#define TAG_PREINPROG           1085
+#define TAG_POSTINPROG          1086
+#define TAG_PREFIXS             1098
+#define TAG_DIRINDEXES          1116
+#define TAG_BASENAMES           1117
+#define TAG_DIRNAMES            1118
+#define RPMFILE_CONFIG          (1 << 0)
+#define RPMFILE_DOC             (1 << 1)
 
 enum rpm_functions_e {
 	rpm_query = 1,
@@ -73,7 +73,7 @@ static int tagcount;
 static void extract_cpio_gz(int fd);
 static rpm_index **rpm_gettags(int fd, int *num_tags);
 static int bsearch_rpmtag(const void *key, const void *item);
-static char *rpm_getstring(int tag, int itemindex);
+static char *rpm_getstr(int tag, int itemindex);
 static int rpm_getint(int tag, int itemindex);
 static int rpm_getcount(int tag);
 static void fileaction_dobackup(char *filename, int fileref);
@@ -83,28 +83,29 @@ static void loop_through_files(int filetag, void (*fileaction)(char *filename, i
 int rpm_main(int argc, char **argv)
 {
 	int opt = 0, func = 0, rpm_fd, offset;
+	const int pagesize = getpagesize();
 
 	while ((opt = getopt(argc, argv, "iqpldc")) != -1) {
 		switch (opt) {
-		case 'i': // First arg: Install mode, with q: Information
-			if (!func) func |= rpm_install;
+		case 'i': /* First arg: Install mode, with q: Information */
+			if (!func) func = rpm_install;
 			else func |= rpm_query_info;
 			break;
-		case 'q': // First arg: Query mode
-			if (!func) func |= rpm_query;
-			else bb_show_usage();
+		case 'q': /* First arg: Query mode */
+			if (func) bb_show_usage();
+			func = rpm_query;
 			break;
-		case 'p': // Query a package
+		case 'p': /* Query a package */
 			func |= rpm_query_package;
 			break;
-		case 'l': // List files in a package
+		case 'l': /* List files in a package */
 			func |= rpm_query_list;
 			break;
-		case 'd': // List doc files in a package (implies list)
+		case 'd': /* List doc files in a package (implies list) */
 			func |= rpm_query_list;
 			func |= rpm_query_list_doc;
 			break;
-		case 'c': // List config files in a package (implies list)
+		case 'c': /* List config files in a package (implies list) */
 			func |= rpm_query_list;
 			func |= rpm_query_list_config;
 			break;
@@ -112,57 +113,73 @@ int rpm_main(int argc, char **argv)
 			bb_show_usage();
 		}
 	}
+	argv += optind;
+	argc -= optind;
+	if (!argc) bb_show_usage();
+
+	while (*argv) {
+		rpm_fd = xopen(*argv++, O_RDONLY);
+		mytags = rpm_gettags(rpm_fd, &tagcount);
+		if (!mytags)
+			bb_error_msg_and_die("error reading rpm header");
+		offset = xlseek(rpm_fd, 0, SEEK_CUR);
+		/* Mimimum is one page */
+		map = mmap(0, offset > pagesize ? (offset + offset % pagesize) : pagesize, PROT_READ, MAP_PRIVATE, rpm_fd, 0);
 
-	if (optind == argc) bb_show_usage();
-	while (optind < argc) {
-		rpm_fd = xopen(argv[optind], O_RDONLY);
-		mytags = rpm_gettags(rpm_fd, (int *) &tagcount);
-		offset = lseek(rpm_fd, 0, SEEK_CUR);
-		if (!mytags) { printf("Error reading rpm header\n"); exit(-1); }
-		map = mmap(0, offset > getpagesize() ? (offset + offset % getpagesize()) : getpagesize(), PROT_READ, MAP_PRIVATE, rpm_fd, 0); // Mimimum is one page
 		if (func & rpm_install) {
-			loop_through_files(RPMTAG_BASENAMES, fileaction_dobackup); /* Backup any config files */
-			extract_cpio_gz(rpm_fd); // Extact the archive
-			loop_through_files(RPMTAG_BASENAMES, fileaction_setowngrp); /* Set the correct file uid/gid's */
-		} else if (func & rpm_query && func & rpm_query_package) {
-			if (!((func & rpm_query_info) || (func & rpm_query_list))) { // If just a straight query, just give package name
-				printf("%s-%s-%s\n", rpm_getstring(RPMTAG_NAME, 0), rpm_getstring(RPMTAG_VERSION, 0), rpm_getstring(RPMTAG_RELEASE, 0));
+			/* Backup any config files */
+			loop_through_files(TAG_BASENAMES, fileaction_dobackup);
+			/* Extact the archive */
+			extract_cpio_gz(rpm_fd);
+			/* Set the correct file uid/gid's */
+			loop_through_files(TAG_BASENAMES, fileaction_setowngrp);
+		}
+		else if ((func & (rpm_query|rpm_query_package)) == (rpm_query|rpm_query_package)) {
+			if (!(func & (rpm_query_info|rpm_query_list))) {
+				/* If just a straight query, just give package name */
+				printf("%s-%s-%s\n", rpm_getstr(TAG_NAME, 0), rpm_getstr(TAG_VERSION, 0), rpm_getstr(TAG_RELEASE, 0));
 			}
 			if (func & rpm_query_info) {
 				/* Do the nice printout */
 				time_t bdate_time;
 				struct tm *bdate;
 				char bdatestring[50];
-				printf("Name        : %-29sRelocations: %s\n", rpm_getstring(RPMTAG_NAME, 0), rpm_getstring(RPMTAG_PREFIXS, 0) ? rpm_getstring(RPMTAG_PREFIXS, 0) : "(not relocateable)");
-				printf("Version     : %-34sVendor: %s\n", rpm_getstring(RPMTAG_VERSION, 0), rpm_getstring(RPMTAG_VENDOR, 0) ? rpm_getstring(RPMTAG_VENDOR, 0) : "(none)");
-				bdate_time = rpm_getint(RPMTAG_BUILDTIME, 0);
+				printf("Name        : %-29sRelocations: %s\n", rpm_getstr(TAG_NAME, 0), rpm_getstr(TAG_PREFIXS, 0) ? rpm_getstr(TAG_PREFIXS, 0) : "(not relocateable)");
+				printf("Version     : %-34sVendor: %s\n", rpm_getstr(TAG_VERSION, 0), rpm_getstr(TAG_VENDOR, 0) ? rpm_getstr(TAG_VENDOR, 0) : "(none)");
+				bdate_time = rpm_getint(TAG_BUILDTIME, 0);
 				bdate = localtime((time_t *) &bdate_time);
 				strftime(bdatestring, 50, "%a %d %b %Y %T %Z", bdate);
-				printf("Release     : %-30sBuild Date: %s\n", rpm_getstring(RPMTAG_RELEASE, 0), bdatestring);
-				printf("Install date: %-30sBuild Host: %s\n", "(not installed)", rpm_getstring(RPMTAG_BUILDHOST, 0));
-				printf("Group       : %-30sSource RPM: %s\n", rpm_getstring(RPMTAG_GROUP, 0), rpm_getstring(RPMTAG_SOURCERPM, 0));
-				printf("Size        : %-33dLicense: %s\n", rpm_getint(RPMTAG_SIZE, 0), rpm_getstring(RPMTAG_LICENSE, 0));
-				printf("URL         : %s\n", rpm_getstring(RPMTAG_URL, 0));
-				printf("Summary     : %s\n", rpm_getstring(RPMTAG_SUMMARY, 0));
-				printf("Description :\n%s\n", rpm_getstring(RPMTAG_DESCRIPTION, 0));
+				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("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));
+				printf("Description :\n%s\n", rpm_getstr(TAG_DESCRIPTION, 0));
 			}
 			if (func & rpm_query_list) {
 				int count, it, flags;
-				count = rpm_getcount(RPMTAG_BASENAMES);
+				count = rpm_getcount(TAG_BASENAMES);
 				for (it = 0; it < count; it++) {
-					flags = rpm_getint(RPMTAG_FILEFLAGS, it);
-					switch ((func & rpm_query_list_doc) + (func & rpm_query_list_config))
-					{
-						case rpm_query_list_doc: if (!(flags & RPMFILE_DOC)) continue; break;
-						case rpm_query_list_config: if (!(flags & RPMFILE_CONFIG)) continue; break;
-						case rpm_query_list_doc + rpm_query_list_config: if (!((flags & RPMFILE_CONFIG) || (flags & RPMFILE_DOC))) continue; break;
+					flags = rpm_getint(TAG_FILEFLAGS, it);
+					switch (func & (rpm_query_list_doc|rpm_query_list_config)) {
+					case rpm_query_list_doc:
+						if (!(flags & RPMFILE_DOC)) continue;
+						break;
+					case rpm_query_list_config:
+						if (!(flags & RPMFILE_CONFIG)) continue;
+						break;
+					case rpm_query_list_doc|rpm_query_list_config:
+						if (!(flags & (RPMFILE_CONFIG|RPMFILE_DOC))) continue;
+						break;
 					}
-					printf("%s%s\n", rpm_getstring(RPMTAG_DIRNAMES, rpm_getint(RPMTAG_DIRINDEXES, it)), rpm_getstring(RPMTAG_BASENAMES, it));
+					printf("%s%s\n",
+						rpm_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, it)),
+						rpm_getstr(TAG_BASENAMES, it));
 				}
 			}
 		}
-		optind++;
-		free (mytags);
+		free(mytags);
 	}
 	return 0;
 }
@@ -186,21 +203,25 @@ static void extract_cpio_gz(int fd) {
 		bb_error_msg_and_die("invalid gzip magic");
 	}
 	check_header_gzip(archive_handle->src_fd);
-	xchdir("/"); // Install RPM's to root
+	xchdir("/"); /* Install RPM's to root */
 
 	archive_handle->src_fd = open_transformer(archive_handle->src_fd, inflate_gunzip);
 	archive_handle->offset = 0;
-	while (get_header_cpio(archive_handle) == EXIT_SUCCESS);
+	while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
+		/* loop */;
 }
 
 
 static rpm_index **rpm_gettags(int fd, int *num_tags)
 {
-	rpm_index **tags = xzalloc(200 * sizeof(struct rpmtag *)); /* We should never need mode than 200, and realloc later */
+	/* We should never need mode than 200, and realloc later */
+	rpm_index **tags = xzalloc(200 * sizeof(struct rpmtag *));
 	int pass, tagindex = 0;
-	lseek(fd, 96, SEEK_CUR); /* Seek past the unused lead */
 
-	for (pass = 0; pass < 2; pass++) { /* 1st pass is the signature headers, 2nd is the main stuff */
+	xlseek(fd, 96, SEEK_CUR); /* Seek past the unused lead */
+
+	/* 1st pass is the signature headers, 2nd is the main stuff */
+	for (pass = 0; pass < 2; pass++) {
 		struct {
 			char magic[3]; /* 3 byte magic: 0x8e 0xad 0xe8 */
 			uint8_t version; /* 1 byte version number */
@@ -211,24 +232,31 @@ static rpm_index **rpm_gettags(int fd, int *num_tags)
 		rpm_index *tmpindex;
 		int storepos;
 
-		read(fd, &header, sizeof(header));
-		if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC, 3) != 0) return NULL; /* Invalid magic */
-		if (header.version != 1) return NULL; /* This program only supports v1 headers */
+		xread(fd, &header, sizeof(header));
+		if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC, 3) != 0)
+			return NULL; /* Invalid magic */
+		if (header.version != 1)
+			return NULL; /* This program only supports v1 headers */
 		header.size = ntohl(header.size);
 		header.entries = ntohl(header.entries);
-		storepos = lseek(fd,0,SEEK_CUR) + header.entries * 16;
+		storepos = xlseek(fd,0,SEEK_CUR) + header.entries * 16;
 
 		while (header.entries--) {
 			tmpindex = tags[tagindex++] = xmalloc(sizeof(rpm_index));
-			read(fd, tmpindex, sizeof(rpm_index));
-			tmpindex->tag = ntohl(tmpindex->tag); tmpindex->type = ntohl(tmpindex->type); tmpindex->count = ntohl(tmpindex->count);
+			xread(fd, tmpindex, sizeof(rpm_index));
+			tmpindex->tag = ntohl(tmpindex->tag);
+			tmpindex->type = ntohl(tmpindex->type);
+			tmpindex->count = ntohl(tmpindex->count);
 			tmpindex->offset = storepos + ntohl(tmpindex->offset);
-			if (pass==0) tmpindex->tag -= 743;
+			if (pass==0)
+				tmpindex->tag -= 743;
 		}
-		lseek(fd, header.size, SEEK_CUR); /* Seek past store */
-		if (pass==0) lseek(fd, (8 - (lseek(fd,0,SEEK_CUR) % 8)) % 8, SEEK_CUR); /* Skip padding to 8 byte boundary after reading signature headers */
+		xlseek(fd, header.size, SEEK_CUR); /* Seek past store */
+		/* Skip padding to 8 byte boundary after reading signature headers */
+		if (pass==0)
+			xlseek(fd, (8 - (xlseek(fd,0,SEEK_CUR) % 8)) % 8, SEEK_CUR);
 	}
-	tags = realloc(tags, tagindex * sizeof(struct rpmtag *)); /* realloc tags to save space */
+	tags = xrealloc(tags, tagindex * sizeof(struct rpmtag *)); /* realloc tags to save space */
 	*num_tags = tagindex;
 	return tags; /* All done, leave the file at the start of the gzipped cpio archive */
 }
@@ -244,42 +272,59 @@ static int rpm_getcount(int tag)
 {
 	rpm_index **found;
 	found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
-	if (!found) return 0;
-	else return found[0]->count;
+	if (!found)
+		return 0;
+	return found[0]->count;
 }
 
-static char *rpm_getstring(int tag, int itemindex)
+static char *rpm_getstr(int tag, int itemindex)
 {
 	rpm_index **found;
 	found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
-	if (!found || itemindex >= found[0]->count) return NULL;
+	if (!found || itemindex >= found[0]->count)
+		return NULL;
 	if (found[0]->type == RPM_STRING_TYPE || found[0]->type == RPM_I18NSTRING_TYPE || found[0]->type == RPM_STRING_ARRAY_TYPE) {
 		int n;
 		char *tmpstr = (char *) (map + found[0]->offset);
-		for (n=0; n < itemindex; n++) tmpstr = tmpstr + strlen(tmpstr) + 1;
+		for (n=0; n < itemindex; n++)
+			tmpstr = tmpstr + strlen(tmpstr) + 1;
 		return tmpstr;
-	} else return NULL;
+	}
+	return NULL;
 }
 
 static int rpm_getint(int tag, int itemindex)
 {
 	rpm_index **found;
-	int n, *tmpint;
+	int *tmpint; /* NB: using int8_t* would be easier to code */
+
 	/* gcc throws warnings here when sizeof(void*)!=sizeof(int) ...
 	 * it's ok to ignore it because tag won't be used as a pointer */
 	found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
-	if (!found || itemindex >= found[0]->count) return -1;
+	if (!found || itemindex >= found[0]->count)
+		return -1;
+
 	tmpint = (int *) (map + found[0]->offset);
+
 	if (found[0]->type == RPM_INT32_TYPE) {
-		for (n=0; n<itemindex; n++) tmpint = (int *) ((void *) tmpint + 4);
-		return ntohl(*tmpint);
-	} else if (found[0]->type == RPM_INT16_TYPE) {
-		for (n=0; n<itemindex; n++) tmpint = (int *) ((void *) tmpint + 2);
-		return ntohs(*tmpint);
-	} else if (found[0]->type == RPM_INT8_TYPE) {
-		for (n=0; n<itemindex; n++) tmpint = (int *) ((void *) tmpint + 1);
-		return ntohs(*tmpint);
-	} else return -1;
+		tmpint = (int *) ((char *) tmpint + itemindex*4);
+		/*return ntohl(*tmpint);*/
+		/* int can be != int32_t */
+		return ntohl(*(int32_t*)tmpint);
+	}
+	if (found[0]->type == RPM_INT16_TYPE) {
+		tmpint = (int *) ((char *) tmpint + itemindex*2);
+		/* ??? read int, and THEN ntohs() it?? */
+		/*return ntohs(*tmpint);*/
+		return ntohs(*(int16_t*)tmpint);
+	}
+	if (found[0]->type == RPM_INT8_TYPE) {
+		tmpint = (int *) ((char *) tmpint + itemindex);
+		/* ??? why we don't read byte here??? */
+		/*return ntohs(*tmpint);*/
+		return *(int8_t*)tmpint;
+	}
+	return -1;
 }
 
 static void fileaction_dobackup(char *filename, int fileref)
@@ -287,9 +332,11 @@ static void fileaction_dobackup(char *filename, int fileref)
 	struct stat oldfile;
 	int stat_res;
 	char *newname;
-	if (rpm_getint(RPMTAG_FILEFLAGS, fileref) & RPMFILE_CONFIG) { /* Only need to backup config files */
-		stat_res = lstat (filename, &oldfile);
-		if (stat_res == 0 && S_ISREG(oldfile.st_mode)) { /* File already exists  - really should check MD5's etc to see if different */
+	if (rpm_getint(TAG_FILEFLAGS, fileref) & RPMFILE_CONFIG) {
+		/* Only need to backup config files */
+		stat_res = lstat(filename, &oldfile);
+		if (stat_res == 0 && S_ISREG(oldfile.st_mode)) {
+			/* File already exists  - really should check MD5's etc to see if different */
 			newname = xasprintf("%s.rpmorig", filename);
 			copy_file(filename, newname, FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS);
 			remove_file(filename, FILEUTILS_RECUR | FILEUTILS_FORCE);
@@ -301,18 +348,18 @@ static void fileaction_dobackup(char *filename, int fileref)
 static void fileaction_setowngrp(char *filename, int fileref)
 {
 	int uid, gid;
-	uid = bb_xgetpwnam(rpm_getstring(RPMTAG_FILEUSERNAME, fileref));
-	gid = bb_xgetgrnam(rpm_getstring(RPMTAG_FILEGROUPNAME, fileref));
+	uid = bb_xgetpwnam(rpm_getstr(TAG_FILEUSERNAME, fileref));
+	gid = bb_xgetgrnam(rpm_getstr(TAG_FILEGROUPNAME, fileref));
 	chown(filename, uid, gid);
 }
 
 static void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref))
 {
 	int count = 0;
-	while (rpm_getstring(filetag, count)) {
-		char * filename = xasprintf("%s%s",
-			rpm_getstring(RPMTAG_DIRNAMES, rpm_getint(RPMTAG_DIRINDEXES,
-			count)), rpm_getstring(RPMTAG_BASENAMES, count));
+	while (rpm_getstr(filetag, count)) {
+		char* filename = xasprintf("%s%s",
+			rpm_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, count)),
+			rpm_getstr(TAG_BASENAMES, count));
 		fileaction(filename, count++);
 		free(filename);
 	}