Set errno to 0 before getpwuid() and check it afterwards - slock - simple X display locker utility
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       ---
 (DIR) commit 6a5512835485ac501d983161ca15b311a95c5649
 (DIR) parent ba3acfc0dcf1d0603bd9d6bdee1e319339b1a509
 (HTM) Author: sin <sin@2f30.org>
       Date:   Thu, 14 Nov 2013 11:24:08 +0000
       
       Set errno to 0 before getpwuid() and check it afterwards
       
       Diffstat:
         M slock.c                             |       5 ++++-
       
       1 file changed, 4 insertions(+), 1 deletion(-)
       ---
 (DIR) diff --git a/slock.c b/slock.c
       @@ -65,8 +65,11 @@ getpw(void) { /* only run as root */
                const char *rval;
                struct passwd *pw;
        
       +        errno = 0;
                pw = getpwuid(getuid());
       -        if(!pw)
       +        if (errno)
       +                die("slock: getpwuid: %s\n", strerror(errno));
       +        else if (!pw)
                        die("slock: cannot retrieve password entry (make sure to suid or sgid slock)\n");
                endpwent();
                rval =  pw->pw_passwd;