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-rw-r--r--toys/posix/cpio.c25
1 files changed, 20 insertions, 5 deletions
diff --git a/toys/posix/cpio.c b/toys/posix/cpio.c
index 4ead989e..2a0f7d92 100644
--- a/toys/posix/cpio.c
+++ b/toys/posix/cpio.c
@@ -13,17 +13,18 @@
* In order: magic ino mode uid gid nlink mtime filesize devmajor devminor
* rdevmajor rdevminor namesize check
-USE_CPIO(NEWTOY(cpio, "mduH:i|t|F:v(verbose)o|[!io][!ot]", TOYFLAG_BIN))
+USE_CPIO(NEWTOY(cpio, "mduH:p:|i|t|F:v(verbose)o|[!pio][!pot][!pF]", TOYFLAG_BIN))
config CPIO
bool "cpio"
default y
help
- usage: cpio -{o|t|i} [-v] [--verbose] [-F FILE] [ignored: -du -H newc]
+ usage: cpio -{o|t|i|p DEST} [-v] [--verbose] [-F FILE] [ignored: -mdu -H newc]
copy files into and out of a "newc" format cpio archive
-F FILE use archive FILE instead of stdin/stdout
+ -p DEST copy-pass mode, copy stdin file list to directory DEST
-i extract from archive into file system (stdin=archive)
-o create archive (stdin=list of files, stdout=archive)
-t test files (list only, stdin=archive, stdout=list of files)
@@ -35,6 +36,7 @@ config CPIO
GLOBALS(
char *archive;
+ char *pass;
char *fmt;
)
@@ -73,11 +75,22 @@ unsigned x8u(char *hex)
void cpio_main(void)
{
- int afd;
-
// Subtle bit: FLAG_o is 1 so we can just use it to select stdin/stdout.
+ int pipe, afd = toys.optflags & FLAG_o;
+ pid_t pid = 0;
+
+ // In passthrough mode, parent stays in original dir and generates archive
+ // to pipe, child does chdir to new dir and reads archive from stdin (pipe).
+ if (TT.pass) {
+ if (!(pid = xpopen(0, &pipe, 0))) {
+ toys.optflags |= FLAG_i;
+ xchdir(TT.pass);
+ } else {
+ toys.optflags |= FLAG_o;
+ afd = pipe;
+ }
+ }
- afd = toys.optflags & FLAG_o;
if (TT.archive) {
int perm = (toys.optflags & FLAG_o) ? O_CREAT|O_WRONLY|O_TRUNC : O_RDONLY;
@@ -254,4 +267,6 @@ void cpio_main(void)
sprintf(toybuf, "070701%040X%056X%08XTRAILER!!!", 1, 0x0b, 0)+4);
}
if (TT.archive) xclose(afd);
+
+ if (TT.pass) toys.exitval |= xpclose(pid, pipe);
}