diff options
| -rw-r--r-- | archival/rpm2cpio.c | 77 | ||||
| -rw-r--r-- | libbb/read.c | 2 |
2 files changed, 49 insertions, 30 deletions
diff --git a/archival/rpm2cpio.c b/archival/rpm2cpio.c index ee93871..566a9f2 100644 --- a/archival/rpm2cpio.c +++ b/archival/rpm2cpio.c @@ -9,11 +9,11 @@ #include "libbb.h" #include "unarchive.h" -#define RPM_MAGIC "\355\253\356\333" -#define RPM_HEADER_MAGIC "\216\255\350" +#define RPM_MAGIC 0xedabeedb +#define RPM_MAGIC_STR "\355\253\356\333" struct rpm_lead { - unsigned char magic[4]; + uint32_t magic; uint8_t major, minor; uint16_t type; uint16_t archnum; @@ -23,67 +23,86 @@ struct rpm_lead { char reserved[16]; }; +#define RPM_HEADER_VERnMAGIC 0x8eade801 +#define RPM_HEADER_MAGIC_STR "\216\255\350" + struct rpm_header { - char magic[3]; /* 3 byte magic: 0x8e 0xad 0xe8 */ - uint8_t version; /* 1 byte version number */ + uint32_t magic_and_ver; /* 3 byte magic: 0x8e 0xad 0xe8; 1 byte version */ 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) +static off_t 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 */ + xread(rpm_fd, &header, sizeof(header)); +// if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC_STR, 3) != 0) { +// bb_error_msg_and_die("invalid RPM header magic"); +// } +// if (header.version != 1) { +// bb_error_msg_and_die("unsupported RPM header version"); +// } + if (header.magic_and_ver != htonl(RPM_HEADER_VERnMAGIC)) { + bb_error_msg_and_die("invalid RPM header magic or unsupported version"); + // ": %x != %x", header.magic_and_ver, htonl(RPM_HEADER_VERnMAGIC)); } - 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 */ + /* Seek past index entries */ + lseek(rpm_fd, 16 * ntohl(header.entries), SEEK_CUR); + /* Seek past store */ + return lseek(rpm_fd, ntohl(header.size), SEEK_CUR); } /* No getopt required */ int rpm2cpio_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; -int rpm2cpio_main(int argc, char **argv) +int rpm2cpio_main(int argc UNUSED_PARAM, char **argv) { struct rpm_lead lead; int rpm_fd; + off_t pos; unsigned char magic[2]; + IF_DESKTOP(long long) int FAST_FUNC (*unpack)(int src_fd, int dst_fd); - if (argc == 1) { + if (!argv[1]) { rpm_fd = STDIN_FILENO; } else { rpm_fd = xopen(argv[1], O_RDONLY); } + xread(rpm_fd, &lead, sizeof(lead)); - 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 */ + /* Just check the magic, the rest is irrelevant */ + if (lead.magic != htonl(RPM_MAGIC)) { + bb_error_msg_and_die("invalid RPM magic"); } - /* Skip the signature header */ - skip_header(rpm_fd); - lseek(rpm_fd, (8 - (lseek(rpm_fd, 0, SEEK_CUR) % 8)) % 8, SEEK_CUR); + /* Skip the signature header, align to 8 bytes */ + pos = skip_header(rpm_fd); + lseek(rpm_fd, (8 - (unsigned)pos) & 7, 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"); + unpack = unpack_gz_stream; + if (magic[0] != 0x1f || magic[1] != 0x8b) { + if (!ENABLE_FEATURE_SEAMLESS_BZ2 + || magic[0] != 'B' || magic[1] != 'Z' + ) { + bb_error_msg_and_die("invalid gzip" + IF_FEATURE_SEAMLESS_BZ2("/bzip2") + " magic"); + } + unpack = unpack_bz2_stream; } - if (unpack_gz_stream(rpm_fd, STDOUT_FILENO) < 0) { - bb_error_msg("error inflating"); + if (unpack(rpm_fd, STDOUT_FILENO) < 0) { + bb_error_msg_and_die("error unpacking"); } - close(rpm_fd); + if (ENABLE_FEATURE_CLEAN_UP) { + close(rpm_fd); + } return 0; } diff --git a/libbb/read.c b/libbb/read.c index b58982b..b93a695 100644 --- a/libbb/read.c +++ b/libbb/read.c @@ -336,7 +336,7 @@ int FAST_FUNC open_zipped(const char *fname) || (ENABLE_FEATURE_SEAMLESS_BZ2 && strcmp(sfx, ".bz2") == 0) ) { /* .gz and .bz2 both have 2-byte signature, and their - * unpack_XXX_stream want this header skipped. */ + * unpack_XXX_stream wants this header skipped. */ xread(fd, &magic, 2); #if ENABLE_FEATURE_SEAMLESS_GZ #if BB_MMU |