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rpm: reformat. was really hard to read

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This commit is contained in:
Denis Vlasenko 2006-12-22 15:03:50 +00:00
parent 0849207ce0
commit f4c52b32db
1 changed files with 168 additions and 121 deletions
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265
archival/rpm.c
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@ -21,31 +21,31 @@
#define RPM_STRING_ARRAY_TYPE 8
#define RPM_I18NSTRING_TYPE 9
#define RPMTAG_NAME 1000
#define RPMTAG_VERSION 1001
#define RPMTAG_RELEASE 1002
#define RPMTAG_SUMMARY 1004
#define RPMTAG_DESCRIPTION 1005
#define RPMTAG_BUILDTIME 1006
#define RPMTAG_BUILDHOST 1007
#define RPMTAG_SIZE 1009
#define RPMTAG_VENDOR 1011
#define RPMTAG_LICENSE 1014
#define RPMTAG_PACKAGER 1015
#define RPMTAG_GROUP 1016
#define RPMTAG_URL 1020
#define RPMTAG_PREIN 1023
#define RPMTAG_POSTIN 1024
#define RPMTAG_FILEFLAGS 1037
#define RPMTAG_FILEUSERNAME 1039
#define RPMTAG_FILEGROUPNAME 1040
#define RPMTAG_SOURCERPM 1044
#define RPMTAG_PREINPROG 1085
#define RPMTAG_POSTINPROG 1086
#define RPMTAG_PREFIXS 1098
#define RPMTAG_DIRINDEXES 1116
#define RPMTAG_BASENAMES 1117
#define RPMTAG_DIRNAMES 1118
#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)
@ -73,7 +73,7 @@ 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_getstring(int tag, int itemindex);
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);
@ -83,28 +83,29 @@ static void loop_through_files(int filetag, void (*fileaction)(char *filename, i
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;
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) func |= rpm_query;
else bb_show_usage();
case 'q': /* First arg: Query mode */
if (func) bb_show_usage();
func = rpm_query;
break;
case 'p': // Query a package
case 'p': /* Query a package */
func |= rpm_query_package;
break;
case 'l': // List files in a package
case 'l': /* List files in a package */
func |= rpm_query_list;
break;
case 'd': // List doc files in a package (implies list)
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)
case 'c': /* List config files in a package (implies list) */
func |= rpm_query_list;
func |= rpm_query_list_config;
break;
@ -112,57 +113,73 @@ int rpm_main(int argc, char **argv)
bb_show_usage();
}
}
argv += optind;
argc -= optind;
if (!argc) 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 (optind == argc) bb_show_usage();
while (optind < argc) {
rpm_fd = xopen(argv[optind], O_RDONLY);
mytags = rpm_gettags(rpm_fd, (int *) &tagcount);
offset = lseek(rpm_fd, 0, SEEK_CUR);
if (!mytags) { printf("Error reading rpm header\n"); exit(-1); }
map = mmap(0, offset > getpagesize() ? (offset + offset % getpagesize()) : getpagesize(), PROT_READ, MAP_PRIVATE, rpm_fd, 0); // Mimimum is one page
if (func & rpm_install) {
loop_through_files(RPMTAG_BASENAMES, fileaction_dobackup); /* Backup any config files */
extract_cpio_gz(rpm_fd); // Extact the archive
loop_through_files(RPMTAG_BASENAMES, fileaction_setowngrp); /* Set the correct file uid/gid's */
} else if (func & rpm_query && func & rpm_query_package) {
if (!((func & rpm_query_info) || (func & rpm_query_list))) { // If just a straight query, just give package name
printf("%s-%s-%s\n", rpm_getstring(RPMTAG_NAME, 0), rpm_getstring(RPMTAG_VERSION, 0), rpm_getstring(RPMTAG_RELEASE, 0));
/* 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_getstring(RPMTAG_NAME, 0), rpm_getstring(RPMTAG_PREFIXS, 0) ? rpm_getstring(RPMTAG_PREFIXS, 0) : "(not relocateable)");
printf("Version : %-34sVendor: %s\n", rpm_getstring(RPMTAG_VERSION, 0), rpm_getstring(RPMTAG_VENDOR, 0) ? rpm_getstring(RPMTAG_VENDOR, 0) : "(none)");
bdate_time = rpm_getint(RPMTAG_BUILDTIME, 0);
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_getstring(RPMTAG_RELEASE, 0), bdatestring);
printf("Install date: %-30sBuild Host: %s\n", "(not installed)", rpm_getstring(RPMTAG_BUILDHOST, 0));
printf("Group : %-30sSource RPM: %s\n", rpm_getstring(RPMTAG_GROUP, 0), rpm_getstring(RPMTAG_SOURCERPM, 0));
printf("Size : %-33dLicense: %s\n", rpm_getint(RPMTAG_SIZE, 0), rpm_getstring(RPMTAG_LICENSE, 0));
printf("URL : %s\n", rpm_getstring(RPMTAG_URL, 0));
printf("Summary : %s\n", rpm_getstring(RPMTAG_SUMMARY, 0));
printf("Description :\n%s\n", rpm_getstring(RPMTAG_DESCRIPTION, 0));
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(RPMTAG_BASENAMES);
count = rpm_getcount(TAG_BASENAMES);
for (it = 0; it < count; it++) {
flags = rpm_getint(RPMTAG_FILEFLAGS, it);
switch ((func & rpm_query_list_doc) + (func & 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) || (flags & RPMFILE_DOC))) continue; break;
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_getstring(RPMTAG_DIRNAMES, rpm_getint(RPMTAG_DIRINDEXES, it)), rpm_getstring(RPMTAG_BASENAMES, it));
printf("%s%s\n",
rpm_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, it)),
rpm_getstr(TAG_BASENAMES, it));
}
}
}
optind++;
free (mytags);
free(mytags);
}
return 0;
}
@ -186,21 +203,25 @@ static void extract_cpio_gz(int fd) {
bb_error_msg_and_die("invalid gzip magic");
}
check_header_gzip(archive_handle->src_fd);
xchdir("/"); // Install RPM's to root
xchdir("/"); /* Install RPM's to root */
archive_handle->src_fd = open_transformer(archive_handle->src_fd, inflate_gunzip);
archive_handle->offset = 0;
while (get_header_cpio(archive_handle) == EXIT_SUCCESS);
while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
/* loop */;
}
static rpm_index **rpm_gettags(int fd, int *num_tags)
{
rpm_index **tags = xzalloc(200 * sizeof(struct rpmtag *)); /* We should never need mode than 200, and realloc later */
/* We should never need mode than 200, and realloc later */
rpm_index **tags = xzalloc(200 * sizeof(struct rpmtag *));
int pass, tagindex = 0;
lseek(fd, 96, SEEK_CUR); /* Seek past the unused lead */
for (pass = 0; pass < 2; pass++) { /* 1st pass is the signature headers, 2nd is the main stuff */
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 */
@ -211,24 +232,31 @@ static rpm_index **rpm_gettags(int fd, int *num_tags)
rpm_index *tmpindex;
int storepos;
read(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 */
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 = lseek(fd,0,SEEK_CUR) + header.entries * 16;
storepos = xlseek(fd,0,SEEK_CUR) + header.entries * 16;
while (header.entries--) {
tmpindex = tags[tagindex++] = xmalloc(sizeof(rpm_index));
read(fd, tmpindex, sizeof(rpm_index));
tmpindex->tag = ntohl(tmpindex->tag); tmpindex->type = ntohl(tmpindex->type); tmpindex->count = ntohl(tmpindex->count);
xread(fd, tmpindex, sizeof(rpm_index));
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;
if (pass==0)
tmpindex->tag -= 743;
}
lseek(fd, header.size, SEEK_CUR); /* Seek past store */
if (pass==0) lseek(fd, (8 - (lseek(fd,0,SEEK_CUR) % 8)) % 8, SEEK_CUR); /* Skip padding to 8 byte boundary after reading signature headers */
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 = realloc(tags, tagindex * sizeof(struct rpmtag *)); /* realloc tags to save space */
tags = xrealloc(tags, tagindex * sizeof(struct rpmtag *)); /* realloc tags to save space */
*num_tags = tagindex;
return tags; /* All done, leave the file at the start of the gzipped cpio archive */
}
@ -244,42 +272,59 @@ static int rpm_getcount(int tag)
{
rpm_index **found;
found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
if (!found) return 0;
else return found[0]->count;
if (!found)
return 0;
return found[0]->count;
}
static char *rpm_getstring(int tag, int itemindex)
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 || 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;
for (n=0; n < itemindex; n++)
tmpstr = tmpstr + strlen(tmpstr) + 1;
return tmpstr;
} else return NULL;
}
return NULL;
}
static int rpm_getint(int tag, int itemindex)
{
rpm_index **found;
int n, *tmpint;
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;
if (!found || itemindex >= found[0]->count)
return -1;
tmpint = (int *) (map + found[0]->offset);
if (found[0]->type == RPM_INT32_TYPE) {
for (n=0; n<itemindex; n++) tmpint = (int *) ((void *) tmpint + 4);
return ntohl(*tmpint);
} else if (found[0]->type == RPM_INT16_TYPE) {
for (n=0; n<itemindex; n++) tmpint = (int *) ((void *) tmpint + 2);
return ntohs(*tmpint);
} else if (found[0]->type == RPM_INT8_TYPE) {
for (n=0; n<itemindex; n++) tmpint = (int *) ((void *) tmpint + 1);
return ntohs(*tmpint);
} else return -1;
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)
@ -287,9 +332,11 @@ static void fileaction_dobackup(char *filename, int fileref)
struct stat oldfile;
int stat_res;
char *newname;
if (rpm_getint(RPMTAG_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 */
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);
@ -301,18 +348,18 @@ static void fileaction_dobackup(char *filename, int fileref)
static void fileaction_setowngrp(char *filename, int fileref)
{
int uid, gid;
uid = bb_xgetpwnam(rpm_getstring(RPMTAG_FILEUSERNAME, fileref));
gid = bb_xgetgrnam(rpm_getstring(RPMTAG_FILEGROUPNAME, fileref));
uid = bb_xgetpwnam(rpm_getstr(TAG_FILEUSERNAME, fileref));
gid = bb_xgetgrnam(rpm_getstr(TAG_FILEGROUPNAME, fileref));
chown(filename, uid, gid);
}
static void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref))
{
int count = 0;
while (rpm_getstring(filetag, count)) {
char * filename = xasprintf("%s%s",
rpm_getstring(RPMTAG_DIRNAMES, rpm_getint(RPMTAG_DIRINDEXES,
count)), rpm_getstring(RPMTAG_BASENAMES, count));
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);
}