diff options
Diffstat (limited to 'archival/rpm.c')
| -rw-r--r-- | archival/rpm.c | 407 |
1 files changed, 407 insertions, 0 deletions
diff --git a/archival/rpm.c b/archival/rpm.c new file mode 100644 index 0000000..4c36067 --- /dev/null +++ b/archival/rpm.c @@ -0,0 +1,407 @@ +/* vi: set sw=4 ts=4: */ +/* + * Mini rpm applet for busybox + * + * Copyright (C) 2001,2002 by Laurence Anderson + * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + */ + +#include "libbb.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 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, + rpm_install = 2, + rpm_query_info = 4, + rpm_query_package = 8, + rpm_query_list = 16, + rpm_query_list_doc = 32, + rpm_query_list_config = 64 +}; + +typedef struct { + uint32_t tag; /* 4 byte tag */ + uint32_t type; /* 4 byte type */ + uint32_t offset; /* 4 byte offset */ + uint32_t count; /* 4 byte count */ +} rpm_index; + +static void *map; +static rpm_index **mytags; +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_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); +static void fileaction_setowngrp(char *filename, int fileref); +static void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref)); + +int rpm_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +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; + else func |= rpm_query_info; + break; + case 'q': /* First arg: Query mode */ + if (func) bb_show_usage(); + func = rpm_query; + break; + case 'p': /* Query a package */ + func |= rpm_query_package; + break; + case 'l': /* List files in a package */ + func |= rpm_query_list; + break; + 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) */ + func |= rpm_query_list; + func |= rpm_query_list_config; + break; + default: + bb_show_usage(); + } + } + argv += optind; + //argc -= optind; + if (!argv[0]) 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 (func & rpm_install) { + /* 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_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_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(TAG_BASENAMES); + for (it = 0; it < count; it++) { + 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_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, it)), + rpm_getstr(TAG_BASENAMES, it)); + } + } + } + free(mytags); + } + return 0; +} + +static void extract_cpio_gz(int fd) +{ + archive_handle_t *archive_handle; + unsigned char magic[2]; +#if BB_MMU + USE_DESKTOP(long long) int FAST_FUNC (*xformer)(int src_fd, int dst_fd); + enum { xformer_prog = 0 }; +#else + enum { xformer = 0 }; + const char *xformer_prog; +#endif + + /* Initialize */ + archive_handle = init_handle(); + archive_handle->seek = seek_by_read; + //archive_handle->action_header = header_list; + archive_handle->action_data = data_extract_all; + archive_handle->ah_flags = ARCHIVE_PRESERVE_DATE | ARCHIVE_CREATE_LEADING_DIRS + /* compat: overwrite existing files. + * try "rpm -i foo.src.rpm" few times in a row - + * standard rpm will not complain. + * (TODO? real rpm creates "file;1234" and then renames it) */ + | ARCHIVE_EXTRACT_UNCONDITIONAL; + archive_handle->src_fd = fd; + /*archive_handle->offset = 0; - init_handle() did it */ + +// TODO: open_zipped does the same + + xread(archive_handle->src_fd, &magic, 2); +#if BB_MMU + xformer = unpack_gz_stream; +#else + xformer_prog = "gunzip"; +#endif + if (magic[0] != 0x1f || magic[1] != 0x8b) { + if (!ENABLE_FEATURE_SEAMLESS_BZ2 + || magic[0] != 'B' || magic[1] != 'Z' + ) { + bb_error_msg_and_die("no gzip" + USE_FEATURE_SEAMLESS_BZ2("/bzip2") + " magic"); + } +#if BB_MMU + xformer = unpack_bz2_stream; +#else + xformer_prog = "bunzip2"; +#endif + } else { +#if !BB_MMU + /* NOMMU version of open_transformer execs an external unzipper that should + * have the file position at the start of the file */ + xlseek(archive_handle->src_fd, 0, SEEK_SET); +#endif + } + + xchdir("/"); /* Install RPM's to root */ + open_transformer(archive_handle->src_fd, xformer, xformer_prog); + archive_handle->offset = 0; + while (get_header_cpio(archive_handle) == EXIT_SUCCESS) + continue; +} + + +static rpm_index **rpm_gettags(int fd, int *num_tags) +{ + /* We should never need mode than 200, and realloc later */ + rpm_index **tags = xzalloc(200 * sizeof(tags[0])); + int pass, tagindex = 0; + + 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 */ + uint32_t reserved; /* 4 bytes reserved */ + uint32_t entries; /* Number of entries in header (4 bytes) */ + uint32_t size; /* Size of store (4 bytes) */ + } header; + struct BUG_header { + char BUG_header[sizeof(header) == 16 ? 1 : -1]; + }; + rpm_index *tmpindex; + int storepos; + + 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 = xlseek(fd,0,SEEK_CUR) + header.entries * 16; + + while (header.entries--) { + tmpindex = tags[tagindex++] = xmalloc(sizeof(*tmpindex)); + xread(fd, tmpindex, sizeof(*tmpindex)); + 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; + } + 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 = xrealloc(tags, tagindex * sizeof(tags[0])); /* realloc tags to save space */ + *num_tags = tagindex; + return tags; /* All done, leave the file at the start of the gzipped cpio archive */ +} + +static int bsearch_rpmtag(const void *key, const void *item) +{ + int *tag = (int *)key; + rpm_index **tmp = (rpm_index **) item; + return (*tag - tmp[0]->tag); +} + +static int rpm_getcount(int tag) +{ + rpm_index **found; + found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag); + if (!found) + return 0; + return found[0]->count; +} + +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[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; + return tmpstr; + } + return NULL; +} + +static int rpm_getint(int tag, int itemindex) +{ + rpm_index **found; + 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; + + tmpint = (int *) (map + found[0]->offset); + + if (found[0]->type == RPM_INT32_TYPE) { + 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) +{ + struct stat oldfile; + int stat_res; + char *newname; + 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); + free(newname); + } + } +} + +static void fileaction_setowngrp(char *filename, int fileref) +{ + /* real rpm warns: "user foo does not exist - using <you>" */ + struct passwd *pw = getpwnam(rpm_getstr(TAG_FILEUSERNAME, fileref)); + int uid = pw ? pw->pw_uid : getuid(); /* or euid? */ + struct group *gr = getgrnam(rpm_getstr(TAG_FILEGROUPNAME, fileref)); + int gid = gr ? gr->gr_gid : getgid(); + chown(filename, uid, gid); +} + +static void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref)) +{ + int count = 0; + 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); + } +} |