rpm2cpio applet by Laurence Anderson

Config.h

@@ -96,6 +96,7 @@
 #define BB_RMDIR
 //#define BB_RMMOD
 //#define BB_ROUTE
+//#define BB_RPM2CPIO
 //#define BB_RPMUNPACK
 #define BB_SED
 //#define BB_SETKEYCODES

applets.h

@@ -326,6 +326,9 @@
 #ifdef BB_ROUTE
  	APPLET(route, route_main, _BB_DIR_USR_BIN)
 #endif
+#ifdef BB_RPM2CPIO
+	APPLET(rpm2cpio, rpm2cpio_main, _BB_DIR_USR_BIN)
+#endif
 #ifdef BB_RPMUNPACK
 	APPLET(rpmunpack, rpmunpack_main, _BB_DIR_USR_BIN)
 #endif

applets/usage.h

@@ -1310,11 +1310,16 @@
 #define route_full_usage \
 	"Edit the kernel's routing tables"
 
+#define rpm2cpio_trivial_usage \
+	"package.rpm"
+#define rpm2cpio_full_usage \
+	"Outputs a cpio archive of the rpm file."
+
 #define rpmunpack_trivial_usage \
 	"< package.rpm | gunzip | cpio -idmuv"
 #define rpmunpack_full_usage \
 	"Extracts an rpm archive."
-
+	
 #define sed_trivial_usage \
 	"[-nef] pattern [files...]"
 #define sed_full_usage \

archival/rpm2cpio.c

@@ -0,0 +1,92 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini rpm2cpio implementation for busybox
+ *
+ * Copyright (C) 2001 by Laurence Anderson
+ *
+ * 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 "busybox.h"
+#include <netinet/in.h> /* For ntohl & htonl function */
+#include <string.h>
+
+#define RPM_MAGIC "\355\253\356\333"
+#define RPM_HEADER_MAGIC "\216\255\350"
+
+typedef unsigned char u8;
+typedef unsigned short u16;
+typedef unsigned int u32;
+
+struct rpm_lead {
+    unsigned char magic[4];
+    u8 major, minor;
+    u16 type;
+    u16 archnum;
+    char name[66];
+    u16 osnum;
+    u16 signature_type;
+    char reserved[16];
+};
+
+struct rpm_header {
+	char magic[3]; /* 3 byte magic: 0x8e 0xad 0xe8 */
+	u8 version; /* 1 byte version number */
+	u32 reserved; /* 4 bytes reserved */
+	u32 entries; /* Number of entries in header (4 bytes) */
+	u32 size; /* Size of store (4 bytes) */
+};
+
+void skip_header(FILE *rpmfile)
+{
+	struct rpm_header header;
+
+	fread(&header, sizeof(struct rpm_header), 1, rpmfile);
+	if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC, 3) != 0) error_msg_and_die("Invalid RPM header magic"); /* Invalid magic */
+	if (header.version != 1) error_msg_and_die("Unsupported RPM header version"); /* This program only supports v1 headers */
+	header.entries = ntohl(header.entries);
+	header.size = ntohl(header.size);
+	fseek (rpmfile, 16 * header.entries, SEEK_CUR); /* Seek past index entries */
+	fseek (rpmfile, header.size, SEEK_CUR); /* Seek past store */
+}
+
+/* No getopt required */
+extern int rpm2cpio_main(int argc, char **argv)
+{
+	struct rpm_lead lead;
+	int gunzip_pid;
+	FILE *rpmfile, *cpiofile;
+
+	if (argc == 1) {
+		rpmfile = stdin;
+	} else {
+		rpmfile = fopen(argv[1], "r");
+	 	if (!rpmfile) perror_msg_and_die("Can't open rpm file");
+	}
+
+	fread (&lead, sizeof(struct rpm_lead), 1, rpmfile);
+	if (strncmp((char *) &lead.magic, RPM_MAGIC, 4) != 0) error_msg_and_die("Invalid RPM magic"); /* Just check the magic, the rest is irrelevant */
+	/* Skip the signature header */
+	skip_header(rpmfile);
+	fseek(rpmfile, (8 - (ftell(rpmfile) % 8)) % 8, SEEK_CUR); /* Pad to 8 byte boundary */
+	/* Skip the main header */
+	skip_header(rpmfile);
+
+	cpiofile = gz_open(rpmfile, &gunzip_pid);
+	copyfd(fileno(cpiofile), fileno(stdout));
+	gz_close(gunzip_pid);
+	fclose(rpmfile);
+	return 0;
+}

docs/busybox_header.pod

@@ -56,17 +56,18 @@ terse runtime description of their behavior.
 Currently defined functions include:
 
 adjtimex, ar, basename, busybox, cat, chgrp, chmod, chown, chroot, chvt, clear,
-cmp, cp, cut, date, dc, dd, deallocvt, df, dirname, dmesg, dos2unix, dpkg,
+cmp, cp, cpio, cut, date, dc, dd, deallocvt, df, dirname, dmesg, dos2unix, dpkg,
 dpkg-deb, du, dumpkmap, dutmp, echo, expr, false, fbset, fdflush, find, free,
 freeramdisk, fsck.minix, getopt, grep, gunzip, gzip, halt, head, hostid,
 hostname, id, ifconfig, init, insmod, kill, killall, klogd, length, ln,
 loadacm, loadfont, loadkmap, logger, logname, ls, lsmod, makedevs, md5sum,
 mkdir, mkfifo, mkfs.minix, mknod, mkswap, mktemp, more, mount, mt, mv, nc,
 nslookup, ping, pivot_root, poweroff, printf, ps, pwd, rdate, readlink, reboot,
-renice, reset, rm, rmdir, rmmod, route, rpmunpack, sed, setkeycodes, sh, sleep,
-sort, stty, swapoff, swapon, sync, syslogd, tail, tar, tee, telnet, test, tftp,
-touch, tr, true, tty, umount, uname, uniq, unix2dos, update, uptime, usleep,
-uudecode, uuencode, watchdog, wc, wget, which, whoami, xargs, yes, zcat, [
+renice, reset, rm, rmdir, rmmod, route, rpm2cpio, rpmunpack, sed, setkeycodes,
+sh, sleep, sort, stty, swapoff, swapon, sync, syslogd, tail, tar, tee, telnet,
+test, tftp, touch, tr, true, tty, umount, uname, uniq, unix2dos, update, uptime,
+usleep, uudecode, uuencode, watchdog, wc, wget, which, whoami, xargs, yes, zcat,
+[
 
 =over 4
 

examples/unrpm

@@ -29,7 +29,7 @@ exist
 type more >/dev/null 2>&1 && pager=more
 type less >/dev/null 2>&1 && pager=less
 [ "$pager" = "" ] && echo "No pager found!" && exit
-(echo -e "\nPress enter to scroll, q to Quit!\n" ; rpmunpack < $rpm | gzip -dc | cpio -tv --quiet) | $pager 
+(echo -e "\nPress enter to scroll, q to Quit!\n" ; rpm2cpio $rpm | cpio -tv --quiet) | $pager
 exit
 elif [ "$1" = "-x" ]; then
 exist
@@ -39,7 +39,7 @@ elif [ ! -d "$3" ]; then
 echo "No such directory $3!"
 exit
 fi
-rpmunpack < $rpm | gzip -d | (umask 0 ; cd $3 ; cpio -idmuv) || exit 
+rpm2cpio $rpm | (umask 0 ; cd $3 ; cpio -idmuv) || exit
 echo
 echo "Extracted $rpm to $3!"
 exit

include/applets.h

@@ -326,6 +326,9 @@
 #ifdef BB_ROUTE
  	APPLET(route, route_main, _BB_DIR_USR_BIN)
 #endif
+#ifdef BB_RPM2CPIO
+	APPLET(rpm2cpio, rpm2cpio_main, _BB_DIR_USR_BIN)
+#endif
 #ifdef BB_RPMUNPACK
 	APPLET(rpmunpack, rpmunpack_main, _BB_DIR_USR_BIN)
 #endif

include/usage.h

@@ -1310,11 +1310,16 @@
 #define route_full_usage \
 	"Edit the kernel's routing tables"
 
+#define rpm2cpio_trivial_usage \
+	"package.rpm"
+#define rpm2cpio_full_usage \
+	"Outputs a cpio archive of the rpm file."
+
 #define rpmunpack_trivial_usage \
 	"< package.rpm | gunzip | cpio -idmuv"
 #define rpmunpack_full_usage \
 	"Extracts an rpm archive."
-
+	
 #define sed_trivial_usage \
 	"[-nef] pattern [files...]"
 #define sed_full_usage \

rpm2cpio.c

@@ -0,0 +1,92 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini rpm2cpio implementation for busybox
+ *
+ * Copyright (C) 2001 by Laurence Anderson
+ *
+ * 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 "busybox.h"
+#include <netinet/in.h> /* For ntohl & htonl function */
+#include <string.h>
+
+#define RPM_MAGIC "\355\253\356\333"
+#define RPM_HEADER_MAGIC "\216\255\350"
+
+typedef unsigned char u8;
+typedef unsigned short u16;
+typedef unsigned int u32;
+
+struct rpm_lead {
+    unsigned char magic[4];
+    u8 major, minor;
+    u16 type;
+    u16 archnum;
+    char name[66];
+    u16 osnum;
+    u16 signature_type;
+    char reserved[16];
+};
+
+struct rpm_header {
+	char magic[3]; /* 3 byte magic: 0x8e 0xad 0xe8 */
+	u8 version; /* 1 byte version number */
+	u32 reserved; /* 4 bytes reserved */
+	u32 entries; /* Number of entries in header (4 bytes) */
+	u32 size; /* Size of store (4 bytes) */
+};
+
+void skip_header(FILE *rpmfile)
+{
+	struct rpm_header header;
+
+	fread(&header, sizeof(struct rpm_header), 1, rpmfile);
+	if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC, 3) != 0) error_msg_and_die("Invalid RPM header magic"); /* Invalid magic */
+	if (header.version != 1) error_msg_and_die("Unsupported RPM header version"); /* This program only supports v1 headers */
+	header.entries = ntohl(header.entries);
+	header.size = ntohl(header.size);
+	fseek (rpmfile, 16 * header.entries, SEEK_CUR); /* Seek past index entries */
+	fseek (rpmfile, header.size, SEEK_CUR); /* Seek past store */
+}
+
+/* No getopt required */
+extern int rpm2cpio_main(int argc, char **argv)
+{
+	struct rpm_lead lead;
+	int gunzip_pid;
+	FILE *rpmfile, *cpiofile;
+
+	if (argc == 1) {
+		rpmfile = stdin;
+	} else {
+		rpmfile = fopen(argv[1], "r");
+	 	if (!rpmfile) perror_msg_and_die("Can't open rpm file");
+	}
+
+	fread (&lead, sizeof(struct rpm_lead), 1, rpmfile);
+	if (strncmp((char *) &lead.magic, RPM_MAGIC, 4) != 0) error_msg_and_die("Invalid RPM magic"); /* Just check the magic, the rest is irrelevant */
+	/* Skip the signature header */
+	skip_header(rpmfile);
+	fseek(rpmfile, (8 - (ftell(rpmfile) % 8)) % 8, SEEK_CUR); /* Pad to 8 byte boundary */
+	/* Skip the main header */
+	skip_header(rpmfile);
+
+	cpiofile = gz_open(rpmfile, &gunzip_pid);
+	copyfd(fileno(cpiofile), fileno(stdout));
+	gz_close(gunzip_pid);
+	fclose(rpmfile);
+	return 0;
+}

scripts/unrpm

@@ -29,7 +29,7 @@ exist
 type more >/dev/null 2>&1 && pager=more
 type less >/dev/null 2>&1 && pager=less
 [ "$pager" = "" ] && echo "No pager found!" && exit
-(echo -e "\nPress enter to scroll, q to Quit!\n" ; rpmunpack < $rpm | gzip -dc | cpio -tv --quiet) | $pager 
+(echo -e "\nPress enter to scroll, q to Quit!\n" ; rpm2cpio $rpm | cpio -tv --quiet) | $pager
 exit
 elif [ "$1" = "-x" ]; then
 exist
@@ -39,7 +39,7 @@ elif [ ! -d "$3" ]; then
 echo "No such directory $3!"
 exit
 fi
-rpmunpack < $rpm | gzip -d | (umask 0 ; cd $3 ; cpio -idmuv) || exit 
+rpm2cpio $rpm | (umask 0 ; cd $3 ; cpio -idmuv) || exit
 echo
 echo "Extracted $rpm to $3!"
 exit

tests/testcases

@@ -292,6 +292,8 @@ touch F ; rm F
 # XXX: doesn't DNS resolve
 route
 
+# rpm2cpio
+
 # rpmunpack
 
 # sed - we can do some one-liners here, some testing is a little
@@ -401,3 +403,4 @@ ls -1 ../e* | xargs
 ls -1 ../e* | xargs md5sum
 
 # yes - can't test: interactive (needs ^C)
+

usage.h

@@ -1310,11 +1310,16 @@
 #define route_full_usage \
 	"Edit the kernel's routing tables"
 
+#define rpm2cpio_trivial_usage \
+	"package.rpm"
+#define rpm2cpio_full_usage \
+	"Outputs a cpio archive of the rpm file."
+
 #define rpmunpack_trivial_usage \
 	"< package.rpm | gunzip | cpio -idmuv"
 #define rpmunpack_full_usage \
 	"Extracts an rpm archive."
-
+	
 #define sed_trivial_usage \
 	"[-nef] pattern [files...]"
 #define sed_full_usage \