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tr: add dflag, error with usage() on invalid flag combination 

Signed-off-by: Hiltjo Posthuma <hiltjo@codemadness.org>
This commit is contained in:
Hiltjo Posthuma 2014-04-09 14:12:34 +02:00 committed by sin
parent 3e49e946b7
commit ff474a8cbc
1 changed files with 13 additions and 5 deletions
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18
tr.c
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@ -12,7 +12,7 @@
static void
usage(void)
{
eprintf("usage: %s set1 [set2]\n", argv0);
eprintf("usage: %s [-d] set1 [set2]\n", argv0);
}
static void
@ -117,6 +117,7 @@ main(int argc, char *argv[])
char *buf = NULL;
size_t size = 0;
void (*mapfunc)(const wchar_t*, char*);
int dflag = 0;
setlocale(LC_ALL, "");
@ -126,6 +127,9 @@ main(int argc, char *argv[])
eprintf("mmap:");
ARGBEGIN {
case 'd':
dflag = 1;
break;
default:
usage();
} ARGEND;
@ -133,12 +137,16 @@ main(int argc, char *argv[])
if(argc == 0)
usage();
if(argc >= 2) {
parsemapping(argv[0], argv[1], mappings);
mapfunc = maptoset;
} else {
if(dflag) {
if(argc >= 2)
usage();
parsemapping(argv[0], NULL, mappings);
mapfunc = maptonull;
} else {
if(argc != 2)
usage();
parsemapping(argv[0], argv[1], mappings);
mapfunc = maptoset;
}
while(afgets(&buf, &size, stdin))