[hackers] [sbase] tar: extract creation mode || Brad Barden

[git]

commit 85a9254d3a21a8ec0468a0c8f1985649866fde75
Author:     Brad Barden <b...@13os.net>
AuthorDate: Wed Nov 18 20:49:07 2015 -0600
Commit:     sin <s...@2f30.org>
CommitDate: Fri Nov 20 09:58:38 2015 +0000

    tar: extract creation mode
    
    mode for newly-created files should be restrictive. chmod is always
    called soon after to set correct mode from the archive.

diff --git a/tar.c b/tar.c
index 1943e18..de58247 100644
--- a/tar.c
+++ b/tar.c
@@ -270,7 +270,7 @@ unarchive(char *fname, ssize_t l, char b[BLKSIZ])
        case RESERVED:
                if ((mode = strtol(h->mode, &p, 8)) < 0 || *p != '\0')
                        eprintf("strtol %s: invalid number\n", h->mode);
-               fd = open(fname, O_WRONLY | O_TRUNC | O_CREAT, 0644);
+               fd = open(fname, O_WRONLY | O_TRUNC | O_CREAT, 0600);
                if (fd < 0)
                        eprintf("open %s:", fname);
                if (fchmod(fd, mode) < 0)