diff options
| -rw-r--r-- | analyzer/pnmpsnr.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/analyzer/pnmpsnr.c b/analyzer/pnmpsnr.c index 1160fff6..4d23d98d 100644 --- a/analyzer/pnmpsnr.c +++ b/analyzer/pnmpsnr.c @@ -151,10 +151,14 @@ main (int argc, char **argv) { pnm_init(&argc, argv); if (argc-1 < 2) - pm_error("Takes two arguments: specifications of the two files."); + pm_error("Takes two arguments: names of the two files to compare"); else { filespec1 = argv[1]; filespec2 = argv[2]; + + if (argc-1 > 2) + pm_error("Too many arguments (%u). The only arguments are " + "the names of the two files to compare", argc-1); } file1 = pm_openr(filespec1); |