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--- Libc/Libc-498/stdlib/FreeBSD/getopt.3
+++ Libc/Libc-320/stdlib/FreeBSD/getopt.3
@@ -1,5 +1,3 @@
-.\" $NetBSD: getopt.3,v 1.31 2003/09/23 10:26:54 wiz Exp $
-.\"
.\" Copyright (c) 1988, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
@@ -32,7 +30,7 @@
.\" SUCH DAMAGE.
.\"
.\" @(#)getopt.3 8.5 (Berkeley) 4/27/95
-.\" $FreeBSD: src/lib/libc/stdlib/getopt.3,v 1.25 2004/07/31 01:00:50 imp Exp $
+.\" $FreeBSD: src/lib/libc/stdlib/getopt.3,v 1.21 2002/12/04 18:57:45 ru Exp $
.\"
.Dd April 27, 1995
.Dt GETOPT 3
@@ -45,12 +43,12 @@
.Sh SYNOPSIS
.In unistd.h
.Vt extern char *optarg ;
-.Vt extern int optind ;
-.Vt extern int optopt ;
-.Vt extern int opterr ;
-.Vt extern int optreset ;
+.Vt extern int optind ;
+.Vt extern int optopt ;
+.Vt extern int opterr ;
+.Vt extern int optreset ;
.Ft int
-.Fn getopt "int argc" "char * const argv[]" "const char *optstring"
+.Fn getopt "int argc" "char * const *argv" "const char *optstring"
.Sh DESCRIPTION
The
.Fn getopt
@@ -99,7 +97,7 @@
option character returned by
.Fn getopt .
.Pp
-The variables
+The variable
.Va opterr
and
.Va optind
@@ -124,7 +122,12 @@
.Pp
The
.Fn getopt
-function returns \-1 when the argument list is exhausted.
+function
+returns \-1
+when the argument list is exhausted, or
+.Ql ?\&
+if a non-recognized
+option is encountered.
The interpretation of options in the argument list may be cancelled
by the option
.Ql --
@@ -135,96 +138,61 @@
argument),
.Fn getopt
returns \-1.
-.Sh RETURN VALUES
-The
-.Fn getopt
-function returns the next known option character in
-.Fa optstring .
+.Sh DIAGNOSTICS
+If the
+.Fn getopt
+function encounters a character not found in the string
+.Va optstring
+or detects
+a missing option argument it writes an error message to the
+.Dv stderr
+and returns
+.Ql ?\& .
+Setting
+.Va opterr
+to a zero will disable these error messages.
If
-.Fn getopt
-encounters a character not found in
-.Fa optstring
-or if it detects a missing option argument,
-it returns
-.Ql \&?
-(question mark).
-If
-.Fa optstring
+.Va optstring
has a leading
.Ql \&:
-then a missing option argument causes
+then a missing option argument causes a
.Ql \&:
-to be returned instead of
-.Ql \&? .
-In either case, the variable
-.Va optopt
-is set to the character that caused the error.
-The
-.Fn getopt
-function returns \-1 when the argument list is exhausted.
+to be returned in addition to suppressing any error messages.
+.Pp
+Option arguments are allowed to begin with
+.Dq Li \- ;
+this is reasonable but
+reduces the amount of error checking possible.
+.Sh EXTENSIONS
+The
+.Va optreset
+variable was added to make it possible to call the
+.Fn getopt
+function multiple times.
+This is an extension to the
+.St -p1003.2
+specification.
.Sh EXAMPLES
.Bd -literal -compact
-#include <unistd.h>
int bflag, ch, fd;
bflag = 0;
-while ((ch = getopt(argc, argv, "bf:")) != -1) {
+while ((ch = getopt(argc, argv, "bf:")) != -1)
switch (ch) {
case 'b':
bflag = 1;
break;
case 'f':
- if ((fd = open(optarg, O_RDONLY, 0)) \*[Lt] 0) {
- (void)fprintf(stderr,
- "myname: %s: %s\en", optarg, strerror(errno));
- exit(1);
- }
+ if ((fd = open(optarg, O_RDONLY, 0)) < 0)
+ err(1, "%s", optarg);
break;
case '?':
default:
usage();
}
-}
argc -= optind;
argv += optind;
.Ed
-.Sh DIAGNOSTICS
-If the
-.Fn getopt
-function encounters a character not found in the string
-.Fa optstring
-or detects
-a missing option argument it writes an error message to the
-.Dv stderr
-and returns
-.Ql \&? .
-Setting
-.Va opterr
-to a zero will disable these error messages.
-If
-.Fa optstring
-has a leading
-.Ql \&:
-then a missing option argument causes a
-.Ql \&:
-to be returned in addition to suppressing any error messages.
-.Pp
-Option arguments are allowed to begin with
-.Dq Li \- ;
-this is reasonable but reduces the amount of error checking possible.
-.Sh SEE ALSO
-.Xr getopt 1 ,
-.Xr getopt_long 3 ,
-.Xr getsubopt 3
-.Sh STANDARDS
-The
-.Va optreset
-variable was added to make it possible to call the
-.Fn getopt
-function multiple times.
-This is an extension to the
-.St -p1003.2
-specification.
.Sh HISTORY
The
.Fn getopt
@@ -241,7 +209,7 @@
to decouple
.Fn getopt
from
-.In stdio.h .
+.Pa <stdio.h> .
.Pp
A single dash
.Dq Li -
@@ -258,20 +226,10 @@
This practice is wrong, and should not be used in any current development.
It is provided for backward compatibility
.Em only .
-Care should be taken not to use
-.Ql \&-
-as the first character in
-.Fa optstring
-to avoid a semantic conflict with
-.Tn GNU
-.Fn getopt ,
-which assigns different meaning to an
-.Fa optstring
-that begins with a
-.Ql \&- .
By default, a single dash causes
.Fn getopt
to return \-1.
+This is, we believe, compatible with System V.
.Pp
It is also possible to handle digits as option letters.
This allows
@@ -282,10 +240,9 @@
This practice is wrong, and should not be used in any current development.
It is provided for backward compatibility
.Em only .
-The following code fragment works in most cases.
+The following code fragment works in most (but not all) cases.
.Bd -literal -offset indent
-int ch;
-long length;
+int length;
char *p, *ep;
while ((ch = getopt(argc, argv, "0123456789")) != -1)
@@ -293,17 +250,16 @@
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
p = argv[optind - 1];
- if (p[0] == '-' \*[Am]\*[Am] p[1] == ch \*[Am]\*[Am] !p[2]) {
- length = ch - '0';
- ep = "";
- } else if (argv[optind] \*[Am]\*[Am] argv[optind][1] == ch) {
+ if (p[0] == '-' && p[1] == ch && !p[2])
+ length = strtol(++p, &ep, 10);
+ else if (argv[optind] && argv[optind][1] == ch) {
length = strtol((p = argv[optind] + 1),
- \*[Am]ep, 10);
+ &ep, 10);
optind++;
optreset = 1;
} else
usage();
- if (*ep != '\e0')
+ if (*ep != '\0')
errx(EX_USAGE, "illegal number -- %s", p);
break;
}