Changeset 2725 in MondoRescue for branches/2.2.9/mindi-busybox/archival/rpm2cpio.c
- Timestamp:
- Feb 25, 2011, 9:26:54 PM (13 years ago)
- File:
-
- 1 edited
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branches/2.2.9/mindi-busybox/archival/rpm2cpio.c
r1765 r2725 5 5 * Copyright (C) 2001 by Laurence Anderson 6 6 * 7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.7 * Licensed under GPLv2 or later, see file LICENSE in this source tree. 8 8 */ 9 9 #include "libbb.h" 10 #include "unarchive.h" 10 #include "archive.h" 11 #include "rpm.h" 11 12 12 #define RPM_MAGIC "\355\253\356\333" 13 #define RPM_HEADER_MAGIC "\216\255\350" 13 enum { rpm_fd = STDIN_FILENO }; 14 14 15 struct rpm_lead { 16 unsigned char magic[4]; 17 uint8_t major, minor; 18 uint16_t type; 19 uint16_t archnum; 20 char name[66]; 21 uint16_t osnum; 22 uint16_t signature_type; 23 char reserved[16]; 24 }; 25 26 struct rpm_header { 27 char magic[3]; /* 3 byte magic: 0x8e 0xad 0xe8 */ 28 uint8_t version; /* 1 byte version number */ 29 uint32_t reserved; /* 4 bytes reserved */ 30 uint32_t entries; /* Number of entries in header (4 bytes) */ 31 uint32_t size; /* Size of store (4 bytes) */ 32 }; 33 34 static void skip_header(int rpm_fd) 15 static unsigned skip_header(void) 35 16 { 36 17 struct rpm_header header; 18 unsigned len; 37 19 38 xread(rpm_fd, &header, sizeof(struct rpm_header)); 39 if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC, 3) != 0) { 40 bb_error_msg_and_die("invalid RPM header magic"); /* Invalid magic */ 20 xread(rpm_fd, &header, sizeof(header)); 21 // if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC_STR, 3) != 0) { 22 // bb_error_msg_and_die("invalid RPM header magic"); 23 // } 24 // if (header.version != 1) { 25 // bb_error_msg_and_die("unsupported RPM header version"); 26 // } 27 if (header.magic_and_ver != htonl(RPM_HEADER_MAGICnVER)) { 28 bb_error_msg_and_die("invalid RPM header magic or unsupported version"); 29 // ": %x != %x", header.magic_and_ver, htonl(RPM_HEADER_MAGICnVER)); 41 30 } 42 if (header.version != 1) { 43 bb_error_msg_and_die("unsupported RPM header version"); /* This program only supports v1 headers */ 44 } 45 header.entries = ntohl(header.entries); 46 header.size = ntohl(header.size); 47 lseek (rpm_fd, 16 * header.entries, SEEK_CUR); /* Seek past index entries */ 48 lseek (rpm_fd, header.size, SEEK_CUR); /* Seek past store */ 31 32 /* Seek past index entries, and past store */ 33 len = 16 * ntohl(header.entries) + ntohl(header.size); 34 seek_by_jump(rpm_fd, len); 35 36 return sizeof(header) + len; 49 37 } 50 38 51 39 /* No getopt required */ 52 int rpm2cpio_main(int argc, char **argv) ;53 int rpm2cpio_main(int argc , char **argv)40 int rpm2cpio_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; 41 int rpm2cpio_main(int argc UNUSED_PARAM, char **argv) 54 42 { 55 43 struct rpm_lead lead; 56 int rpm_fd; 57 unsigned char magic[2]; 44 unsigned pos; 58 45 59 if (argc == 1) { 60 rpm_fd = STDIN_FILENO; 61 } else { 62 rpm_fd = xopen(argv[1], O_RDONLY); 46 if (argv[1]) { 47 xmove_fd(xopen(argv[1], O_RDONLY), rpm_fd); 48 } 49 xread(rpm_fd, &lead, sizeof(lead)); 50 51 /* Just check the magic, the rest is irrelevant */ 52 if (lead.magic != htonl(RPM_LEAD_MAGIC)) { 53 bb_error_msg_and_die("invalid RPM magic"); 63 54 } 64 55 65 xread(rpm_fd, &lead, sizeof(struct rpm_lead)); 66 if (strncmp((char *) &lead.magic, RPM_MAGIC, 4) != 0) { 67 bb_error_msg_and_die("invalid RPM magic"); /* Just check the magic, the rest is irrelevant */ 68 } 69 70 /* Skip the signature header */ 71 skip_header(rpm_fd); 72 lseek(rpm_fd, (8 - (lseek(rpm_fd, 0, SEEK_CUR) % 8)) % 8, SEEK_CUR); 56 /* Skip the signature header, align to 8 bytes */ 57 pos = skip_header(); 58 seek_by_jump(rpm_fd, (-(int)pos) & 7); 73 59 74 60 /* Skip the main header */ 75 skip_header( rpm_fd);61 skip_header(); 76 62 77 xread(rpm_fd, &magic, 2); 78 if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) { 79 bb_error_msg_and_die("invalid gzip magic"); 63 #if 0 64 /* This works, but doesn't report uncompress errors (they happen in child) */ 65 setup_unzip_on_fd(rpm_fd /*fail_if_not_detected: 1*/); 66 if (bb_copyfd_eof(rpm_fd, STDOUT_FILENO) < 0) 67 bb_error_msg_and_die("error unpacking"); 68 #else 69 /* BLOAT */ 70 { 71 union { 72 uint8_t b[4]; 73 uint16_t b16[2]; 74 uint32_t b32[1]; 75 } magic; 76 IF_DESKTOP(long long) int FAST_FUNC (*unpack)(int src_fd, int dst_fd); 77 78 xread(rpm_fd, magic.b16, sizeof(magic.b16[0])); 79 if (magic.b16[0] == GZIP_MAGIC) { 80 unpack = unpack_gz_stream; 81 } else 82 if (ENABLE_FEATURE_SEAMLESS_BZ2 83 && magic.b16[0] == BZIP2_MAGIC 84 ) { 85 unpack = unpack_bz2_stream; 86 } else 87 if (ENABLE_FEATURE_SEAMLESS_XZ 88 && magic.b16[0] == XZ_MAGIC1 89 ) { 90 xread(rpm_fd, magic.b32, sizeof(magic.b32[0])); 91 if (magic.b32[0] != XZ_MAGIC2) 92 goto no_magic; 93 /* unpack_xz_stream wants fd at position 6, no need to seek */ 94 //xlseek(rpm_fd, -6, SEEK_CUR); 95 unpack = unpack_xz_stream; 96 } else { 97 no_magic: 98 bb_error_msg_and_die("no gzip" 99 IF_FEATURE_SEAMLESS_BZ2("/bzip2") 100 IF_FEATURE_SEAMLESS_XZ("/xz") 101 " magic"); 102 } 103 if (unpack(rpm_fd, STDOUT_FILENO) < 0) 104 bb_error_msg_and_die("error unpacking"); 80 105 } 106 #endif 81 107 82 check_header_gzip_or_die(rpm_fd); 83 if (unpack_gz_stream(rpm_fd, STDOUT_FILENO) < 0) { 84 bb_error_msg("error inflating"); 108 if (ENABLE_FEATURE_CLEAN_UP) { 109 close(rpm_fd); 85 110 } 86 87 close(rpm_fd);88 111 89 112 return 0;
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