diff options
Diffstat (limited to 'archival/tar.c')
| -rw-r--r-- | archival/tar.c | 66 |
1 files changed, 28 insertions, 38 deletions
diff --git a/archival/tar.c b/archival/tar.c index 5bd473a..e116bd2 100644 --- a/archival/tar.c +++ b/archival/tar.c @@ -160,13 +160,6 @@ #define block_buf bb_common_bufsiz1 -#if !ENABLE_FEATURE_SEAMLESS_GZ && !ENABLE_FEATURE_SEAMLESS_BZ2 -/* Do not pass gzip flag to writeTarFile() */ -#define writeTarFile(tar_fd, verboseFlag, recurseFlags, include, exclude, gzip) \ - writeTarFile(tar_fd, verboseFlag, recurseFlags, include, exclude) -#endif - - #if ENABLE_FEATURE_TAR_CREATE /* @@ -621,21 +614,12 @@ static int FAST_FUNC writeFileToTarball(const char *fileName, struct stat *statb return TRUE; } -#if ENABLE_FEATURE_SEAMLESS_GZ || ENABLE_FEATURE_SEAMLESS_BZ2 -# if !(ENABLE_FEATURE_SEAMLESS_GZ && ENABLE_FEATURE_SEAMLESS_BZ2) -# define vfork_compressor(tar_fd, gzip) vfork_compressor(tar_fd) -# endif +#if SEAMLESS_COMPRESSION /* Don't inline: vfork scares gcc and pessimizes code */ -static void NOINLINE vfork_compressor(int tar_fd, int gzip) +static void NOINLINE vfork_compressor(int tar_fd, const char *gzip) { pid_t gzipPid; -# if ENABLE_FEATURE_SEAMLESS_GZ && ENABLE_FEATURE_SEAMLESS_BZ2 - const char *zip_exec = (gzip == 1) ? "gzip" : "bzip2"; -# elif ENABLE_FEATURE_SEAMLESS_GZ - const char *zip_exec = "gzip"; -# else /* only ENABLE_FEATURE_SEAMLESS_BZ2 */ - const char *zip_exec = "bzip2"; -# endif + // On Linux, vfork never unpauses parent early, although standard // allows for that. Do we want to waste bytes checking for it? # define WAIT_FOR_CHILD 0 @@ -649,11 +633,6 @@ static void NOINLINE vfork_compressor(int tar_fd, int gzip) signal(SIGPIPE, SIG_IGN); /* we only want EPIPE on errors */ -# if defined(__GNUC__) && __GNUC__ - /* Avoid vfork clobbering */ - (void) &zip_exec; -# endif - gzipPid = xvfork(); if (gzipPid == 0) { @@ -669,7 +648,7 @@ static void NOINLINE vfork_compressor(int tar_fd, int gzip) xmove_fd(gzipDataPipe.rd, 0); xmove_fd(tar_fd, 1); /* exec gzip/bzip2 program/applet */ - BB_EXECLP(zip_exec, zip_exec, "-f", (char *)0); + BB_EXECLP(gzip, gzip, "-f", (char *)0); vfork_exec_errno = errno; _exit(EXIT_FAILURE); } @@ -692,16 +671,21 @@ static void NOINLINE vfork_compressor(int tar_fd, int gzip) # endif if (vfork_exec_errno) { errno = vfork_exec_errno; - bb_perror_msg_and_die("can't execute '%s'", zip_exec); + bb_perror_msg_and_die("can't execute '%s'", gzip); } } -#endif /* ENABLE_FEATURE_SEAMLESS_GZ || ENABLE_FEATURE_SEAMLESS_BZ2 */ +#endif /* SEAMLESS_COMPRESSION */ +#if !SEAMLESS_COMPRESSION +/* Do not pass gzip flag to writeTarFile() */ +#define writeTarFile(tar_fd, verboseFlag, recurseFlags, include, exclude, gzip) \ + writeTarFile(tar_fd, verboseFlag, recurseFlags, include, exclude) +#endif /* gcc 4.2.1 inlines it, making code bigger */ static NOINLINE int writeTarFile(int tar_fd, int verboseFlag, int recurseFlags, const llist_t *include, - const llist_t *exclude, int gzip) + const llist_t *exclude, const char *gzip) { int errorFlag = FALSE; struct TarBallInfo tbInfo; @@ -714,7 +698,7 @@ static NOINLINE int writeTarFile(int tar_fd, int verboseFlag, * can avoid including the tarball into itself.... */ xfstat(tbInfo.tarFd, &tbInfo.tarFileStatBuf, "can't stat tar file"); -#if ENABLE_FEATURE_SEAMLESS_GZ || ENABLE_FEATURE_SEAMLESS_BZ2 +#if SEAMLESS_COMPRESSION if (gzip) vfork_compressor(tbInfo.tarFd, gzip); #endif @@ -749,7 +733,7 @@ static NOINLINE int writeTarFile(int tar_fd, int verboseFlag, if (errorFlag) bb_error_msg("error exit delayed from previous errors"); -#if ENABLE_FEATURE_SEAMLESS_GZ || ENABLE_FEATURE_SEAMLESS_BZ2 +#if SEAMLESS_COMPRESSION if (gzip) { int status; if (safe_waitpid(-1, &status, 0) == -1) @@ -764,7 +748,7 @@ static NOINLINE int writeTarFile(int tar_fd, int verboseFlag, #else int writeTarFile(int tar_fd, int verboseFlag, int recurseFlags, const llist_t *include, - const llist_t *exclude, int gzip); + const llist_t *exclude, const char *gzip); #endif /* FEATURE_TAR_CREATE */ #if ENABLE_FEATURE_TAR_FROM @@ -1149,18 +1133,24 @@ int tar_main(int argc UNUSED_PARAM, char **argv) if (base_dir) xchdir(base_dir); - //if (SEAMLESS_COMPRESSION || OPT_COMPRESS) + //if (SEAMLESS_COMPRESSION) // /* We need to know whether child (gzip/bzip/etc) exits abnormally */ // signal(SIGCHLD, check_errors_in_children); /* Create an archive */ if (opt & OPT_CREATE) { -#if ENABLE_FEATURE_SEAMLESS_GZ || ENABLE_FEATURE_SEAMLESS_BZ2 - int zipMode = 0; - if (ENABLE_FEATURE_SEAMLESS_GZ && (opt & OPT_GZIP)) - zipMode = 1; - if (ENABLE_FEATURE_SEAMLESS_BZ2 && (opt & OPT_BZIP2)) - zipMode = 2; +#if SEAMLESS_COMPRESSION + const char *zipMode = NULL; + if (opt & OPT_COMPRESS) + zipMode = "compress"; + if (opt & OPT_GZIP) + zipMode = "gzip"; + if (opt & OPT_BZIP2) + zipMode = "bzip2"; + if (opt & OPT_LZMA) + zipMode = "lzma"; + if (opt & OPT_XZ) + zipMode = "xz"; #endif /* NB: writeTarFile() closes tar_handle->src_fd */ return writeTarFile(tar_handle->src_fd, verboseFlag, |