140 static const char * progname;   /* program name for error messages */  variable
149   fprintf(stderr, "usage: %s [switches] ", progname);  in usage()
259               progname);  in parse_switches()
327               progname);  in parse_switches()
344               progname);  in parse_switches()
354               progname);  in parse_switches()
419               progname);  in parse_switches()
507   progname = argv[0];  in main()
508   if (progname == NULL || progname[0] == 0)  in main()
509     progname = "cjpeg";         /* in case C library doesn't provide it */  in main()
542                 progname);  in main()
549                 progname);  in main()
557     fprintf(stderr, "%s: only one input file\n", progname);  in main()
565       fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);  in main()
576       fprintf(stderr, "%s: can't open %s\n", progname, outfilename);  in main()