67 lines
1.1 KiB
C
Executable file
67 lines
1.1 KiB
C
Executable file
/*
|
|
* getopt - parse command-line options
|
|
*/
|
|
/* $Header$ */
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
|
|
#define ERR(s, c) if(opterr){\
|
|
fputs(argv[0], stderr);\
|
|
fputs(s, stderr);\
|
|
fputc(c, stderr);\
|
|
fputc('\n', stderr);}
|
|
|
|
int opterr = 1;
|
|
int optind = 1;
|
|
int optopt;
|
|
char *optarg;
|
|
|
|
int
|
|
getopt(argc, argv, opts)
|
|
int argc;
|
|
char **argv;
|
|
char *opts;
|
|
{
|
|
static int sp = 1;
|
|
register c;
|
|
register char *cp;
|
|
|
|
if (sp == 1)
|
|
if (optind >= argc ||
|
|
argv[optind][0] != '-' || argv[optind][1] == '\0')
|
|
return EOF;
|
|
else if (!strcmp(argv[optind], "--")) {
|
|
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;
|
|
}
|