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[Bug libc/11043] New: botched messages printed by getopt with W;
- From: "ebb9 at byu dot net" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: 2 Dec 2009 18:08:30 -0000
- Subject: [Bug libc/11043] New: botched messages printed by getopt with W;
- Reply-to: sourceware-bugzilla at sourceware dot org
When using getopt_long with "W;", the error messages are inconsistent, and in
some cases, downright wrong.
$cat foo.c
#include <unistd.h>
#include <stdio.h>
#include <getopt.h>
static const struct option opts[] =
{
{ "alpha", no_argument, NULL, 'a' },
{ "beta", required_argument, NULL, 'b' },
{ "c1", no_argument, NULL, 'c' },
{ "c2", no_argument, NULL, 'c' },
{ NULL, 0, NULL, 0 }
};
int
main (int argc, char **argv)
{
int c = getopt_long (argc, argv, "W;", opts, NULL);
if (c == -1)
puts ("got -1");
else
printf ("got %c\n", c);
return 0;
}
$ ./foo --al=
./foo: option `--al=' doesn't allow an argument
got ?
$ ./foo -W al=
./foo: option `-W alpha' doesn't allow an argument
got ?
$ ./foo -Wal=
./foo: option `-W alpha' doesn't allow an argument
got ?
$ ./foo --be
./foo: option `--be' requires an argument
got ?
$ ./foo -W be
./foo: option `be' requires an argument
got ?
$ ./foo -Wbe
./foo: option `-Wbe' requires an argument
got ?
$ ./foo2 -W c a
./foo2: option `-W a' is ambiguous
got ?
$ ./foo2 -W c
./foo2: option `-W (null)' is ambiguous
got ?
$ ./foo2 -Wc a
./foo2: option `-W a' is ambiguous
got ?
Notice how with -W, an extra argument prints the full text of the struct option
rather than what the user typed and prints a space after the -W whether or not
the user had a space; a missing argument prints just the argv slot containing
what the user typed but without the -W; and an ambiguous argument prints the
wrong argv slot altogether (although whether this particular example should have
been ambiguous in the first place is already the subject of 11041).
--
Summary: botched messages printed by getopt with W;
Product: glibc
Version: 2.11
Status: NEW
Severity: normal
Priority: P2
Component: libc
AssignedTo: drepper at redhat dot com
ReportedBy: ebb9 at byu dot net
CC: glibc-bugs at sources dot redhat dot com
BugsThisDependsOn: 11041
http://sourceware.org/bugzilla/show_bug.cgi?id=11043
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