[hackers] [sbase] Convert chown() failure to a warning in tar(1) || sin

[git]

commit 542f645bc226bca275a852afa24dc48f73074ca0
Author: sin <s...@2f30.org>
Date:   Tue Apr 21 09:15:13 2015 +0100

    Convert chown() failure to a warning in tar(1)
    
    This particular change does not have any immediate shortcomings.
    We still print a warning to alert the user.
    
    Exiting on a chown() failure caused problems when untarring
    inside a restricted user namespace on Linux where the uid/gid
    mappings were limited.

diff --git a/tar.c b/tar.c
index 06fb654..573dbdb 100644
--- a/tar.c
+++ b/tar.c
@@ -242,7 +242,7 @@ unarchive(char *fname, ssize_t l, char b[BLKSIZ])
        if ((gid = strtol(h->gid, &p, 8)) < 0 || *p != '\0')
                eprintf("strtol %s: invalid number\n", h->gid);
        if (!getuid() && chown(fname, uid, gid))
-               eprintf("chown %s:", fname);
+               weprintf("chown %s:", fname);
 
        for (; l > 0; l -= BLKSIZ) {
                if (fread(b, BLKSIZ, 1, tarfile) != 1)