1 /* $NetBSD: getoldopt.c,v 1.16 2002/10/13 00:32:09 mrg Exp $ */ 2 3 /* 4 * Plug-compatible replacement for getopt() for parsing tar-like 5 * arguments. If the first argument begins with "-", it uses getopt; 6 * otherwise, it uses the old rules used by tar, dump, and ps. 7 * 8 * Written 25 August 1985 by John Gilmore (ihnp4!hoptoad!gnu) and placed 9 * in the Public Domain for your edification and enjoyment. 10 */ 11 12 #include <sys/cdefs.h> 13 #if defined(__RCSID) && !defined(lint) 14 __RCSID("$NetBSD: getoldopt.c,v 1.16 2002/10/13 00:32:09 mrg Exp $"); 15 #endif /* not lint */ 16 17 #include <getopt.h> 18 #include <stdio.h> 19 #include <string.h> 20 #include <stdlib.h> 21 #include <unistd.h> 22 #include <sys/stat.h> 23 #include "pax.h" 24 #include "extern.h" 25 26 int 27 getoldopt(int argc, char **argv, const char *optstring, 28 struct option *longopts, int *idx) 29 { 30 static char *key; /* Points to next keyletter */ 31 static char use_getopt; /* !=0 if argv[1][0] was '-' */ 32 char c; 33 char *place; 34 35 optarg = NULL; 36 37 if (key == NULL) { /* First time */ 38 if (argc < 2) return -1; 39 key = argv[1]; 40 if (*key == '-') 41 use_getopt++; 42 else 43 optind = 2; 44 } 45 46 if (use_getopt) { 47 if (longopts != NULL) { 48 return getopt_long(argc, argv, optstring, 49 longopts, idx); 50 } else { 51 return getopt(argc, argv, optstring); 52 } 53 } 54 55 c = *key++; 56 if (c == '\0') { 57 key--; 58 return -1; 59 } 60 place = strchr(optstring, c); 61 62 if (place == NULL || c == ':') { 63 fprintf(stderr, "%s: unknown option %c\n", argv[0], c); 64 return('?'); 65 } 66 67 place++; 68 if (*place == ':') { 69 if (optind < argc) { 70 optarg = argv[optind]; 71 optind++; 72 } else { 73 fprintf(stderr, "%s: %c argument missing\n", 74 argv[0], c); 75 return('?'); 76 } 77 } 78 79 return(c); 80 } 81