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/* this is a public domain version of getopt */
/* FTP Site: ftp.uu.net/pub/OS/unix/bsd-sources/lib/librpc/etc/getopt.c */
#include <stdio.h>
#include <string.h>
#define MYNULL 0
#define ERR(s, c) if(opterr){\
extern size_t strlen();\
extern int write();\
char errbuf[2];\
errbuf[0] = c; errbuf[1] = '\n';\
(void) write(2, argv[0], strlen(argv[0]));\
(void) write(2, s, strlen(s));\
(void) write(2, errbuf, 2);}
int opterr = 1;
int optind = 1;
int optopt;
char *optarg;
int
getopt(argc, argv, opts)
int argc;
char **argv, *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], "--") == MYNULL) {
optind++;
return(EOF);
}
optopt = c = argv[optind][sp];
if(c == ':' || (cp=strchr(opts, c)) == NULL) {
ERR(": unknown 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(": argument missing for -", c);
sp = 1;
return('?');
} else
optarg = argv[optind++];
sp = 1;
} else {
if(argv[optind][++sp] == '\0') {
sp = 1;
optind++;
}
optarg = NULL;
}
return(c);
}
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