check the return value of dup(2)

diff --git a/src/compress.c b/src/compress.c
index 91c69a16935c75daeaf58a51a730d3b155e9ee2a..22960808d61749f1ae25a341ef0b14d99db79aa1 100644 (file)
--- a/src/compress.c
+++ b/src/compress.c
@@ -35,7 +35,7 @@
 #include "file.h"
 
 #ifndef lint
-FILE_RCSID("@(#)$File: compress.c,v 1.68 2011/12/08 12:38:24 rrt Exp $")
+FILE_RCSID("@(#)$File: compress.c,v 1.69 2012/08/26 10:21:37 christos Exp $")
 #endif
 
 #include "magic.h"
@@ -397,16 +397,19 @@ uncompressbuf(struct magic_set *ms, int fd, size_t method,
        case 0: /* child */
                (void) close(0);
                if (fd != -1) {
-                   (void) dup(fd);
+                   if (dup(fd) == -1)
+                       _exit(1);
                    (void) lseek(0, (off_t)0, SEEK_SET);
                } else {
-                   (void) dup(fdin[0]);
+                   if (dup(fdin[0]) == -1)
+                       _exit(1);
                    (void) close(fdin[0]);
                    (void) close(fdin[1]);
                }
 
                (void) close(1);
-               (void) dup(fdout[1]);
+               if (dup(fdout[1]) == -1)
+                       _exit(1);
                (void) close(fdout[0]);
                (void) close(fdout[1]);
 #ifndef DEBUG