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Make example for handling "-##" work and comply with style(9). Still

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doesn't handle nastier corner cases such as "-j3 -33" correctly.  <shrug>

PR:		docs/12994 (James Howard <howardjp@wam.umd.edu>)
This commit is contained in:
Tim Vanderhoek 2000-01-06 01:25:15 +00:00
parent dac2aaa459
commit 838fb327f2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=55490
1 changed files with 12 additions and 5 deletions
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17
lib/libc/stdlib/getopt.3
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@ -243,10 +243,10 @@ as an option.
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 length;
char *p;
char *p, *ep;
while ((ch = getopt(argc, argv, "0123456789")) != -1)
switch (ch) {
@ -254,9 +254,16 @@ while ((ch = getopt(argc, argv, "0123456789")) != -1)
case '5': case '6': case '7': case '8': case '9':
p = argv[optind - 1];
if (p[0] == '-' && p[1] == ch && !p[2])
length = atoi(++p);
else
length = atoi(argv[optind] + 1);
length = strtol(++p, &ep, 10);
else if (argv[optind] && argv[optind][1] == ch) {
length = strtol((p = argv[optind] + 1),
&ep, 10);
optind++;
optreset = 1;
} else
usage();
if (*ep != '\0')
errx(EX_USAGE, "illegal number -- %s", p);
break;
}
.Ed