catv: catv without arguments was trying to use environ as argv.

(Alex Landau <landau_alex@yahoo.com>)

1 files changed, 6 insertions, 3 deletions

diff --git a/coreutils/catv.c b/coreutils/catv.c
index 876b67a2a..0ca73a0c9 100644
--- a/coreutils/catv.c
+++ b/coreutils/catv.c
@@ -15,7 +15,8 @@
 int catv_main(int argc, char **argv);
 int catv_main(int argc, char **argv)
 {
-        int retval = EXIT_SUCCESS, fd;
+        int retval = EXIT_SUCCESS;
+        int fd;
         unsigned flags;
 
         flags = getopt32(argc, argv, "etv");
@@ -27,8 +28,10 @@ int catv_main(int argc, char **argv)
 
         /* Read from stdin if there's nothing else to do. */
         fd = 0;
-        if (!argv[0])
+        if (!argv[0]) {
+                argv--;
                 goto jump_in;
+        }
         do {
                 fd = open_or_warn(*argv, O_RDONLY);
                 if (fd < 0) {
@@ -46,7 +49,7 @@ int catv_main(int argc, char **argv)
                         if (res < 1)
                                 break;
                         for (i = 0; i < res; i++) {
-                                char c = read_buf[i];
+                                unsigned char c = read_buf[i];
 
                                 if (c > 126 && (flags & CATV_OPT_v)) {
                                         if (c == 127) {