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- /*
- * AT&T's public domain getopt().
- *
- * This was FTPed from comp.sources.unix archives, vol 3 (Feb '86)
- * as att_getopt.c. These archives can be found on UUNET.UU.NET.
- *
- * Code modified to support ANSI function prototypes, GAT, 29-Oct-89.
- *
- * Modifications to provide prototypes for all functions, GAT, 27-Jul-90.
- */
-
- /*LINTLIBRARY*/
- #define NULL 0
- #define EOF (-1)
- #define ERR(s, c) if(opterr){\
- extern int strlen(char *), write(int, char *, unsigned int);\
- char errbuf[2];\
- errbuf[0] = c; errbuf[1] = '\n';\
- (void) write(2, argv[0], (unsigned)strlen(argv[0]));\
- (void) write(2, s, (unsigned)strlen(s));\
- (void) write(2, errbuf, 2);}
-
- extern int strcmp(char *, char *);
- extern char *strchr(char *, int);
-
- int opterr = 1;
- int optind = 1;
- int optopt;
- char *optarg;
-
- int getopt(int argc, char **argv, char *opts)
- {
- static int sp = 1;
- register int c;
- register char *cp;
-
- if(sp == 1)
- if(optind >= argc ||
- argv[optind][0] != '-' || argv[optind][1] == '\0')
- return(EOF);
- else if(strcmp(argv[optind], "--") == NULL) {
- optind++;
- return(EOF);
- }
- optopt = c = argv[optind][sp];
- if(c == ':' || (cp=strchr(opts, c)) == NULL) {
- ERR(": illegal option -- ", c);
- if(argv[optind][++sp] == '\0') {
- optind++;
- sp = 1;
- }
- return('?');
- }
- if(*++cp == ':') {
- if(argv[optind][sp+1] != '\0')
- optarg = &argv[optind++][sp+1];
- else if(++optind >= argc) {
- ERR(": option requires an argument -- ", c);
- sp = 1;
- return('?');
- } else
- optarg = argv[optind++];
- sp = 1;
- } else {
- if(argv[optind][++sp] == '\0') {
- sp = 1;
- optind++;
- }
- optarg = NULL;
- }
- return(c);
- }
-