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Diffstat (limited to 'i/pc104/initrd/conf/busybox/archival/rpm2cpio.c')
-rw-r--r--i/pc104/initrd/conf/busybox/archival/rpm2cpio.c90
1 files changed, 90 insertions, 0 deletions
diff --git a/i/pc104/initrd/conf/busybox/archival/rpm2cpio.c b/i/pc104/initrd/conf/busybox/archival/rpm2cpio.c
new file mode 100644
index 0000000..307d1a0
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/archival/rpm2cpio.c
@@ -0,0 +1,90 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini rpm2cpio implementation for busybox
+ *
+ * Copyright (C) 2001 by Laurence Anderson
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+#include "busybox.h"
+#include "unarchive.h"
+
+#define RPM_MAGIC "\355\253\356\333"
+#define RPM_HEADER_MAGIC "\216\255\350"
+
+struct rpm_lead {
+ unsigned char magic[4];
+ uint8_t major, minor;
+ uint16_t type;
+ uint16_t archnum;
+ char name[66];
+ uint16_t osnum;
+ uint16_t signature_type;
+ char reserved[16];
+};
+
+struct rpm_header {
+ char magic[3]; /* 3 byte magic: 0x8e 0xad 0xe8 */
+ uint8_t version; /* 1 byte version number */
+ uint32_t reserved; /* 4 bytes reserved */
+ uint32_t entries; /* Number of entries in header (4 bytes) */
+ uint32_t size; /* Size of store (4 bytes) */
+};
+
+static void skip_header(int rpm_fd)
+{
+ struct rpm_header header;
+
+ xread(rpm_fd, &header, sizeof(struct rpm_header));
+ if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC, 3) != 0) {
+ bb_error_msg_and_die("invalid RPM header magic"); /* Invalid magic */
+ }
+ if (header.version != 1) {
+ bb_error_msg_and_die("unsupported RPM header version"); /* This program only supports v1 headers */
+ }
+ header.entries = ntohl(header.entries);
+ header.size = ntohl(header.size);
+ lseek (rpm_fd, 16 * header.entries, SEEK_CUR); /* Seek past index entries */
+ lseek (rpm_fd, header.size, SEEK_CUR); /* Seek past store */
+}
+
+/* No getopt required */
+int rpm2cpio_main(int argc, char **argv);
+int rpm2cpio_main(int argc, char **argv)
+{
+ struct rpm_lead lead;
+ int rpm_fd;
+ unsigned char magic[2];
+
+ if (argc == 1) {
+ rpm_fd = STDIN_FILENO;
+ } else {
+ rpm_fd = xopen(argv[1], O_RDONLY);
+ }
+
+ xread(rpm_fd, &lead, sizeof(struct rpm_lead));
+ if (strncmp((char *) &lead.magic, RPM_MAGIC, 4) != 0) {
+ bb_error_msg_and_die("invalid RPM magic"); /* Just check the magic, the rest is irrelevant */
+ }
+
+ /* Skip the signature header */
+ skip_header(rpm_fd);
+ lseek(rpm_fd, (8 - (lseek(rpm_fd, 0, SEEK_CUR) % 8)) % 8, SEEK_CUR);
+
+ /* Skip the main header */
+ skip_header(rpm_fd);
+
+ xread(rpm_fd, &magic, 2);
+ if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
+ bb_error_msg_and_die("invalid gzip magic");
+ }
+
+ check_header_gzip_or_die(rpm_fd);
+ if (inflate_gunzip(rpm_fd, STDOUT_FILENO) < 0) {
+ bb_error_msg("error inflating");
+ }
+
+ close(rpm_fd);
+
+ return 0;
+}