diff options
Diffstat (limited to 'toys')
| -rw-r--r-- | toys/posix/cpio.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/toys/posix/cpio.c b/toys/posix/cpio.c index 04700ddb..b60e19b4 100644 --- a/toys/posix/cpio.c +++ b/toys/posix/cpio.c @@ -22,7 +22,7 @@ config CPIO default y help usage: cpio -{o|t|i|p DEST} [-v] [--verbose] [-F FILE] [--no-preserve-owner] - [ignored: -mdu -H newc] + [ignored: -m -H newc] Copy files into and out of a "newc" format cpio archive. @@ -32,6 +32,7 @@ config CPIO -o Create archive (stdin=list of files, stdout=archive) -t Test files (list only, stdin=archive, stdout=list of files) -d Create directories if needed + -u unlink existing files when extracting -v Verbose --no-preserve-owner (don't set ownership during extract) */ @@ -137,6 +138,8 @@ void cpio_main(void) // (This output is unaffected by --quiet.) if (FLAG(t) || FLAG(v)) puts(name); + if (FLAG(u) && !test) if (unlink(name) && errno == EISDIR) rmdir(name); + if (!test && FLAG(d) && strrchr(name, '/') && mkpath(name)) { perror_msg("mkpath '%s'", name); test++; @@ -146,7 +149,7 @@ void cpio_main(void) // properly aligned with next file. if (S_ISDIR(mode)) { - if (!test) err = mkdir(name, mode); + if (!test) err = mkdir(name, mode) && !FLAG(u); } else if (S_ISLNK(mode)) { data = strpad(afd, size, 0); if (!test) err = symlink(data, name); @@ -155,7 +158,7 @@ void cpio_main(void) if (!err && !geteuid() && !FLAG(no_preserve_owner)) err = lchown(name, uid, gid); } else if (S_ISREG(mode)) { - int fd = test ? 0 : open(name, O_CREAT|O_WRONLY|O_TRUNC|O_NOFOLLOW, mode); + int fd = test ? 0 : open(name, O_CREAT|O_WRONLY|O_EXCL|O_NOFOLLOW, mode); // If write fails, we still need to read/discard data to continue with // archive. Since doing so overwrites errno, report error now |