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authorElliott Hughes <enh@google.com>2017-05-12 18:30:03 -0700
committerRob Landley <rob@landley.net>2017-05-19 13:11:12 -0500
commit83b3531ec2876fa76817501bf1a38d4438ac39e6 (patch)
tree8f8ac8464695f54d269f286af18d6ccff74347b6 /toys
parentd852ec18900ef635a38f99ed769a636f15af72c6 (diff)
downloadtoybox-83b3531ec2876fa76817501bf1a38d4438ac39e6.tar.gz
Add bzip2 support to tar.
Also trivial cleanup of pipe -> xpipe. Bug: http://b/38215123
Diffstat (limited to 'toys')
-rw-r--r--toys/pending/tar.c23
1 files changed, 12 insertions, 11 deletions
diff --git a/toys/pending/tar.c b/toys/pending/tar.c
index b6d27cb6..4d6979db 100644
--- a/toys/pending/tar.c
+++ b/toys/pending/tar.c
@@ -7,13 +7,13 @@
* For writing to external program
* http://www.gnu.org/software/tar/manual/html_node/Writing-to-an-External-Program.html
-USE_TAR(NEWTOY(tar, "&(no-recursion)(numeric-owner)(no-same-permissions)(overwrite)(exclude)*(to-command):o(no-same-owner)p(same-permissions)k(keep-old)c(create)|h(dereference)x(extract)|t(list)|v(verbose)z(gzip)O(to-stdout)m(touch)X(exclude-from)*T(files-from)*C(directory):f(file):[!txc]", TOYFLAG_USR|TOYFLAG_BIN))
+USE_TAR(NEWTOY(tar, "&(no-recursion)(numeric-owner)(no-same-permissions)(overwrite)(exclude)*(to-command):o(no-same-owner)p(same-permissions)k(keep-old)c(create)|h(dereference)x(extract)|t(list)|v(verbose)j(bzip2)z(gzip)O(to-stdout)m(touch)X(exclude-from)*T(files-from)*C(directory):f(file):[!txc][!jz]", TOYFLAG_USR|TOYFLAG_BIN))
config TAR
bool "tar"
default n
help
- usage: tar -[cxtzhmvO] [-X FILE] [-T FILE] [-f TARFILE] [-C DIR]
+ usage: tar -[cxtjzhmvO] [-X FILE] [-T FILE] [-f TARFILE] [-C DIR]
Create, extract, or list files from a tar file
@@ -21,6 +21,7 @@ config TAR
c Create
f Name of TARFILE ('-' for stdin/out)
h Follow symlinks
+ j (De)compress using bzip2
m Don't restore mtime
t List
v Verbose
@@ -294,7 +295,7 @@ static void compress_stream(struct archive_handler *tar_hdl)
if (cpid == -1) perror_exit("fork");
if (!cpid) { /* Child reads from pipe */
- char *argv[] = {"gzip", "-f", NULL};
+ char *argv[] = {(toys.optflags&FLAG_z)?"gzip":"bzip2", "-f", NULL};
xclose(pipefd[1]); /* Close unused write*/
dup2(pipefd[0], 0);
dup2(tar_hdl->src_fd, 1); //write to tar fd
@@ -319,7 +320,7 @@ static void extract_to_command(struct archive_handler *tar)
pid_t cpid;
struct file_header *file_hdr = &tar->file_hdr;
- if (pipe(pipefd) == -1) error_exit("pipe");
+ xpipe(pipefd);
if (!S_ISREG(file_hdr->mode)) return; //only regular files are supported.
cpid = fork();
@@ -510,13 +511,14 @@ static void extract_stream(struct archive_handler *tar_hdl)
int pipefd[2];
pid_t cpid;
- if (pipe(pipefd) == -1) error_exit("pipe");
+ xpipe(pipefd);
cpid = fork();
if (cpid == -1) perror_exit("fork");
if (!cpid) { /* Child reads from pipe */
- char *argv[] = {"gunzip", "-cf", "-", NULL};
+ char *argv[] =
+ {(toys.optflags&FLAG_z)?"gunzip":"bunzip2", "-cf", "-", NULL};
xclose(pipefd[0]); /* Close unused read*/
dup2(tar_hdl->src_fd, 0);
dup2(pipefd[1], 1); //write to pipe
@@ -579,7 +581,6 @@ static void unpack_tar(struct archive_handler *tar_hdl)
struct file_header *file_hdr;
int i, j, maj, min, sz, e = 0;
unsigned int cksum;
- unsigned char *gzMagic;
char *longname = NULL, *longlink = NULL;
while (1) {
@@ -601,11 +602,11 @@ static void unpack_tar(struct archive_handler *tar_hdl)
continue;
}
if (strncmp(tar.magic, "ustar", 5)) {
- //try detecting by reading magic
+ // Try detecting .gz or .bz2 by looking for their magic.
CHECK_MAGIC:
- gzMagic = (unsigned char*)&tar;
- if ((gzMagic[0] == 0x1f) && (gzMagic[1] == 0x8b)
+ if ((!strncmp(tar.name, "\x1f\x8b", 2) || !strncmp(tar.name, "BZh", 3))
&& !lseek(tar_hdl->src_fd, -i, SEEK_CUR)) {
+ toys.optflags |= (*tar.name == 'B') ? FLAG_j : FLAG_z;
tar_hdl->offset -= i;
extract_stream(tar_hdl);
continue;
@@ -792,7 +793,7 @@ void tar_main(void)
error_msg("'%s' not in archive", tmp->arg);
} else if (toys.optflags & FLAG_c) {
//create the tar here.
- if (toys.optflags & FLAG_z) compress_stream(tar_hdl);
+ if (toys.optflags & (FLAG_j|FLAG_z)) compress_stream(tar_hdl);
for (tmp = TT.inc; tmp; tmp = tmp->next) {
TT.handle = tar_hdl;
//recurse thru dir and add files to archive