25 static const char *filename;  variable
91 	    die("%s: end of file\n", filename);  in get_number()
97 		    die("%s: end of file\n", filename);  in get_number()
108 	    die("%s: end of file\n", filename);  in get_number()
127     fp = fopen(filename, "r");  in read_image()
129 	die("Cannot open file %s: %s\n", filename, strerror(errno));  in read_image()
134 	die("%s is not a PNM file\n", filename);  in read_image()
148 		"Use pnmnoraw(1) to convert it to ASCII PNM\n", filename);  in read_image()
151 	    die("%s is not a PNM file\n", filename);  in read_image()
235     fprintf(out, " *  It was automatically generated from %s\n", filename);  in write_header()
486     filename = argv[optind];  in main()