[hackers] [sbase] tar: Don't crash when get{pw,gr}uid fails || Michael Forney

From: <git_AT_suckless.org>
Date: Sat, 01 Nov 2014 23:34:01 +0100

commit 453ce96d44b8bf9de7cccb68dba9d5233d630ea2
Author: Michael Forney <mforney_AT_mforney.org>
Date: Sat Nov 1 20:36:37 2014 +0000

    tar: Don't crash when get{pw,gr}uid fails

diff --git a/tar.c b/tar.c
index 4f4abff..c18d89e 100644
--- a/tar.c
+++ b/tar.c
_AT_@ -177,8 +177,8 @@ archive(const char* path)
         putoctal(h->mtime, (unsigned)st.st_mtime, sizeof h->mtime);
         memcpy(h->magic, "ustar", sizeof h->magic);
         memcpy(h->version, "00", sizeof h->version);
- snprintf(h->uname, sizeof h->uname, "%s", pw->pw_name);
- snprintf(h->gname, sizeof h->gname, "%s", gr->gr_name);
+ snprintf(h->uname, sizeof h->uname, "%s", pw ? pw->pw_name : "");
+ snprintf(h->gname, sizeof h->gname, "%s", gr ? gr->gr_name : "");
 
         mode = st.st_mode;
         if(S_ISREG(mode)) {
Received on Sat Nov 01 2014 - 23:34:01 CET