blob: dbe60b186091d7c73884c72bd0a90284877a5043 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
#ifndef lint
#ifndef NOID
static char elsieid[] = "@(#)getopt.c 7.5";
/* Modified from the UCB version with the SCCS ID appearing below. */
#endif /* !defined NOID */
#endif /* !defined lint */
/*LINTLIBRARY*/
/*
* Copyright (c) 1987 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and that due credit is given
* to the University of California at Berkeley. The name of the University
* may not be used to endorse or promote products derived from this
* software without specific written prior permission. This software
* is provided ``as is'' without express or implied warranty.
*/
#ifdef LIBC_SCCS
#ifndef lint
static char sccsid[] = "@(#)getopt.c 4.5 (Berkeley) 11/24/87";
#endif /* !defined lint */
#endif /* defined LIBC_SCCS */
#include <stdio.h>
/*
* get option letter from argument vector
*/
extern int opterr; /* if error message should be printed */
extern int optind; /* index into parent argv vector */
extern int optopt; /* character checked for validity */
extern char * optarg; /* argument associated with option */
#define BADCH (int)'?'
static char EMSG[1];
#define tell(s) { \
if (opterr) { \
(void) fputs(*nargv, stderr); \
(void) fputs(s, stderr); \
(void) fputc(optopt, stderr); \
(void) fputc((int)'\n', stderr); \
} \
return(BADCH); \
}
extern char * strchr();
int
getopt(nargc, nargv, ostr)
int nargc;
char **nargv, *ostr;
{
static char *place = EMSG; /* option letter processing */
register char *oli; /* option letter list index */
if (!*place) { /* update scanning pointer */
if (optind >= nargc || *(place = nargv[optind]) != '-' ||
!*++place)
return(EOF);
if (*place == '-') { /* found "--" */
++optind;
return(EOF);
}
} /* option letter okay? */
if ((optopt = (int)*place++) == (int)':' ||
!(oli = strchr(ostr, optopt))) {
if (!*place)
++optind;
tell(": illegal option -- ");
}
if (*++oli != ':') { /* don't need argument */
optarg = NULL;
if (!*place)
++optind;
}
else { /* need an argument */
if (*place) /* no white space */
optarg = place;
else if (nargc <= ++optind) { /* no arg */
place = EMSG;
tell(": option requires an argument -- ");
}
else /* white space */
optarg = nargv[optind];
place = EMSG;
++optind;
}
return(optopt); /* dump back option letter */
}
|
