diff options
Diffstat (limited to 'bin/pax/getoldopt.c')
-rw-r--r-- | bin/pax/getoldopt.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/bin/pax/getoldopt.c b/bin/pax/getoldopt.c new file mode 100644 index 0000000..37c235b --- /dev/null +++ b/bin/pax/getoldopt.c @@ -0,0 +1,71 @@ +/* $OpenBSD: getoldopt.c,v 1.4 2000/01/22 20:24:51 deraadt Exp $ */ +/* $NetBSD: getoldopt.c,v 1.3 1995/03/21 09:07:28 cgd Exp $ */ + +/* + * Plug-compatible replacement for getopt() for parsing tar-like + * arguments. If the first argument begins with "-", it uses getopt; + * otherwise, it uses the old rules used by tar, dump, and ps. + * + * Written 25 August 1985 by John Gilmore (ihnp4!hoptoad!gnu) and placed + * in the Pubic Domain for your edification and enjoyment. + */ + +#ifndef lint +static const char rcsid[] = "$FreeBSD$"; +#endif /* not lint */ + +#include <stdio.h> +#include <string.h> +#include <unistd.h> + +int +getoldopt(argc, argv, optstring) + int argc; + char **argv; + char *optstring; +{ + static char *key; /* Points to next keyletter */ + static char use_getopt; /* !=0 if argv[1][0] was '-' */ + char c; + char *place; + + optarg = NULL; + + if (key == NULL) { /* First time */ + if (argc < 2) return EOF; + key = argv[1]; + if (*key == '-') + use_getopt++; + else + optind = 2; + } + + if (use_getopt) + return getopt(argc, argv, optstring); + + c = *key++; + if (c == '\0') { + key--; + return EOF; + } + place = strchr(optstring, c); + + if (place == NULL || c == ':') { + fprintf(stderr, "%s: unknown option %c\n", argv[0], c); + return('?'); + } + + place++; + if (*place == ':') { + if (optind < argc) { + optarg = argv[optind]; + optind++; + } else { + fprintf(stderr, "%s: %c argument missing\n", + argv[0], c); + return('?'); + } + } + + return(c); +} |