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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. This practice is wrong, and should not be used in any current development.
It is provided for backward compatibility It is provided for backward compatibility
.Em only . .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 .Bd -literal -offset indent
int length; int length;
char *p; char *p, *ep;
while ((ch = getopt(argc, argv, "0123456789")) != -1) while ((ch = getopt(argc, argv, "0123456789")) != -1)
switch (ch) { switch (ch) {
@ -254,9 +254,16 @@ while ((ch = getopt(argc, argv, "0123456789")) != -1)
case '5': case '6': case '7': case '8': case '9': case '5': case '6': case '7': case '8': case '9':
p = argv[optind - 1]; p = argv[optind - 1];
if (p[0] == '-' && p[1] == ch && !p[2]) if (p[0] == '-' && p[1] == ch && !p[2])
length = atoi(++p); length = strtol(++p, &ep, 10);
else else if (argv[optind] && argv[optind][1] == ch) {
length = atoi(argv[optind] + 1); length = strtol((p = argv[optind] + 1),
&ep, 10);
optind++;
optreset = 1;
} else
usage();
if (*ep != '\0')
errx(EX_USAGE, "illegal number -- %s", p);
break; break;
} }
.Ed .Ed