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tar: small fixes:

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* size-optimize mapping code
* kill double close
This commit is contained in:
Denis Vlasenko 2006-11-24 14:59:45 +00:00
parent c50f370f98
commit b8a8e601df
2 changed files with 42 additions and 38 deletions
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46
archival/tar.c
View File

@ -150,7 +150,9 @@ static HardLinkInfo *findHardLinkInfo(HardLinkInfo * hlInfo, struct stat *statbu
/* Put an octal string into the specified buffer.
* The number is zero padded and possibly null terminated.
* Returns TRUE if successful. - DISABLED (no caller ever checked) */
* Returns TRUE if successful. - DISABLED (no caller ever checked) */
/* FIXME: we leave field untouched if value doesn't fit. */
/* This is not good - what will happen at untar time?? */
static void putOctal(char *cp, int len, long long value)
{
int tempLength;
@ -205,9 +207,7 @@ static int writeTarHeader(struct TarBallInfo *tbInfo,
putOctal(header.mode, sizeof(header.mode), statbuf->st_mode & 07777);
putOctal(header.uid, sizeof(header.uid), statbuf->st_uid);
putOctal(header.gid, sizeof(header.gid), statbuf->st_gid);
if (sizeof(header.size) != sizeof("00000000000"))
BUG_tar_header_size();
strcpy(header.size, "00000000000"); /* Regular file size is handled later */
memset(header.size, '0', sizeof(header.size)-1); /* Regular file size is handled later */
putOctal(header.mtime, sizeof(header.mtime), statbuf->st_mtime);
strcpy(header.magic, "ustar ");
@ -401,7 +401,7 @@ static int writeFileToTarball(const char *fileName, struct stat *statbuf,
/* tar will be corrupted. So bail out. */
/* NB: GNU tar 1.16 warns and pads with zeroes */
/* or even seeks back and updates header */
bb_error_msg_and_die("short read from %s", fileName);
bb_error_msg_and_die("short read from %s, aborting", fileName);
}
/* Check that file did not grow in between? */
/* if (safe_read(inputFileFd,1) == 1) warn but continue? */
@ -461,8 +461,7 @@ static int writeTarFile(const int tar_fd, const int verboseFlag,
dup2(gzipDataPipe[0], 0);
close(gzipDataPipe[1]);
if (tbInfo.tarFd != 1)
dup2(tbInfo.tarFd, 1);
dup2(tbInfo.tarFd, 1);
close(gzipStatusPipe[0]);
fcntl(gzipStatusPipe[1], F_SETFD, FD_CLOEXEC); /* close on exec shows success */
@ -831,7 +830,7 @@ int tar_main(int argc, char **argv)
flags = O_RDONLY;
}
if ((tar_filename[0] == '-') && (tar_filename[1] == '\0')) {
if (tar_filename[0] == '-' && !tar_filename[1]) {
tar_handle->src_fd = fileno(tar_stream);
tar_handle->seek = seek_by_read;
} else {
@ -860,23 +859,24 @@ int tar_main(int argc, char **argv)
writeTarFile(tar_handle->src_fd, verboseFlag, opt & TAR_OPT_DEREFERENCE,
tar_handle->accept,
tar_handle->reject, zipMode);
} else {
while (get_header_ptr(tar_handle) == EXIT_SUCCESS)
/* nothing */;
/* Check that every file that should have been extracted was */
while (tar_handle->accept) {
if (!find_list_entry(tar_handle->reject, tar_handle->accept->data)
&& !find_list_entry(tar_handle->passed, tar_handle->accept->data)
) {
bb_error_msg_and_die("%s: not found in archive",
tar_handle->accept->data);
}
tar_handle->accept = tar_handle->accept->link;
}
/* NB: writeTarFile() closes tar_handle->src_fd */
return EXIT_SUCCESS;
}
if (ENABLE_FEATURE_CLEAN_UP && tar_handle->src_fd != STDIN_FILENO)
while (get_header_ptr(tar_handle) == EXIT_SUCCESS)
/* nothing */;
/* Check that every file that should have been extracted was */
while (tar_handle->accept) {
if (!find_list_entry(tar_handle->reject, tar_handle->accept->data)
&& !find_list_entry(tar_handle->passed, tar_handle->accept->data)
) {
bb_error_msg_and_die("%s: not found in archive",
tar_handle->accept->data);
}
tar_handle->accept = tar_handle->accept->link;
}
if (ENABLE_FEATURE_CLEAN_UP /* && tar_handle->src_fd != STDIN_FILENO */)
close(tar_handle->src_fd);
return EXIT_SUCCESS;

34
libbb/procps.c
View File

@ -35,6 +35,7 @@ void clear_username_cache(void)
clear_cache(&groupname);
}
#if 0 /* more generic, but we don't need that yet */
/* Returns -N-1 if not found. */
/* cp->cache[N] is allocated and must be filled in this case */
static int get_cached(cache_t *cp, unsigned id)
@ -48,25 +49,28 @@ static int get_cached(cache_t *cp, unsigned id)
cp->cache[i++].id = id;
return -i;
}
#endif
typedef char* ug_func(char *name, long uid, int bufsize);
static char* get_cached(cache_t *cp, unsigned id, ug_func* fp)
{
int i;
for (i = 0; i < cp->size; i++)
if (cp->cache[i].id == id)
return cp->cache[i].name;
i = cp->size++;
cp->cache = xrealloc(cp->cache, cp->size * sizeof(*cp->cache));
cp->cache[i].id = id;
fp(cp->cache[i].name, id, sizeof(cp->cache[i].name));
return cp->cache[i].name;
}
const char* get_cached_username(uid_t uid)
{
int i = get_cached(&username, uid);
if (i < 0) {
i = -i - 1;
bb_getpwuid(username.cache[i].name, uid,
sizeof(username.cache[i].name));
}
return username.cache[i].name;
return get_cached(&username, uid, bb_getpwuid);
}
const char* get_cached_groupname(uid_t uid)
const char* get_cached_groupname(gid_t gid)
{
int i = get_cached(&groupname, uid);
if (i < 0) {
i = -i - 1;
bb_getgrgid(groupname.cache[i].name, uid,
sizeof(groupname.cache[i].name));
}
return username.cache[i].name;
return get_cached(&groupname, gid, bb_getgrgid);
}