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Dirk Clemens pointed out how easy it is to support bzip2 compression, since we

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shell out to an external program to handle gzip anyway...
This commit is contained in:
Rob Landley 2005-08-30 03:40:03 +00:00
parent de55987667
commit cc8885f6f3
1 changed files with 15 additions and 18 deletions
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33
archival/tar.c
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@ -431,12 +431,7 @@ static inline int writeTarFile(const int tar_fd, const int verboseFlag,
const unsigned long dereferenceFlag, const llist_t *include,
const llist_t *exclude, const int gzip)
{
#ifdef CONFIG_FEATURE_TAR_GZIP
int gzipDataPipe[2] = { -1, -1 };
int gzipStatusPipe[2] = { -1, -1 };
pid_t gzipPid = 0;
volatile int vfork_exec_errno = 0;
#endif
int errorFlag = FALSE;
ssize_t size;
@ -453,10 +448,15 @@ static inline int writeTarFile(const int tar_fd, const int verboseFlag,
if (fstat(tbInfo.tarFd, &tbInfo.statBuf) < 0)
bb_perror_msg_and_die("Couldnt stat tar file");
#ifdef CONFIG_FEATURE_TAR_GZIP
if (gzip) {
if ((ENABLE_FEATURE_TAR_GZIP || ENABLE_FEATURE_TAR_BZIP2) && gzip) {
int gzipDataPipe[2] = { -1, -1 };
int gzipStatusPipe[2] = { -1, -1 };
volatile int vfork_exec_errno = 0;
char *zip_exec = (gzip == 1) ? "gzip" : "bzip2";
if (pipe(gzipDataPipe) < 0 || pipe(gzipStatusPipe) < 0) {
bb_perror_msg_and_die("Failed to create gzip pipe");
bb_perror_msg_and_die("Failed to create pipe");
}
signal(SIGPIPE, SIG_IGN); /* we only want EPIPE on errors */
@ -479,7 +479,7 @@ static inline int writeTarFile(const int tar_fd, const int verboseFlag,
close(gzipStatusPipe[0]);
fcntl(gzipStatusPipe[1], F_SETFD, FD_CLOEXEC); /* close on exec shows sucess */
execl("/bin/gzip", "gzip", "-f", 0);
execlp(zip_exec, zip_exec, "-f", 0);
vfork_exec_errno = errno;
close(gzipStatusPipe[1]);
@ -495,7 +495,7 @@ static inline int writeTarFile(const int tar_fd, const int verboseFlag,
if (n == 0 && vfork_exec_errno != 0) {
errno = vfork_exec_errno;
bb_perror_msg_and_die("Could not exec gzip process");
bb_perror_msg_and_die("Could not exec %s",zip_exec);
} else if ((n < 0) && (errno == EAGAIN || errno == EINTR))
continue; /* try it again */
break;
@ -507,7 +507,6 @@ static inline int writeTarFile(const int tar_fd, const int verboseFlag,
bb_perror_msg_and_die("Failed to vfork gzip process");
}
}
#endif
tbInfo.excludeList = exclude;
@ -537,12 +536,10 @@ static inline int writeTarFile(const int tar_fd, const int verboseFlag,
freeHardLinkInfo(&tbInfo.hlInfoHead);
#ifdef CONFIG_FEATURE_TAR_GZIP
if (gzip && gzipPid) {
if (gzipPid) {
if (waitpid(gzipPid, NULL, 0) == -1)
printf("Couldnt wait ?");
}
#endif
return !errorFlag;
}
@ -846,16 +843,16 @@ int tar_main(int argc, char **argv)
/* create an archive */
if (opt & CTX_CREATE) {
int verboseFlag = FALSE;
int gzipFlag = FALSE;
int zipMode = 0;
# ifdef CONFIG_FEATURE_TAR_GZIP
if (get_header_ptr == get_header_tar_gz) {
gzipFlag = TRUE;
zipMode = 1;
}
# endif /* CONFIG_FEATURE_TAR_GZIP */
# ifdef CONFIG_FEATURE_TAR_BZIP2
if (get_header_ptr == get_header_tar_bz2) {
bb_error_msg_and_die("Creating bzip2 compressed archives is not currently supported.");
zipMode = 2;
}
# endif /* CONFIG_FEATURE_TAR_BZIP2 */
@ -864,7 +861,7 @@ int tar_main(int argc, char **argv)
verboseFlag = TRUE;
}
writeTarFile(tar_handle->src_fd, verboseFlag, opt & TAR_OPT_DEREFERNCE, tar_handle->accept,
tar_handle->reject, gzipFlag);
tar_handle->reject, zipMode);
} else
#endif /* CONFIG_FEATURE_TAR_CREATE */
{