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tr: improving checking flags and allowed number of arguments

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Hiltjo Posthuma 2025-11-05 19:04:39 +01:00 committed by Roberto E. Vargas Caballero
parent ee7ff4fb95
commit b93f0c750d
1 changed files with 6 additions and 6 deletions
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12
tr.c
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@ -191,15 +191,15 @@ main(int argc, char *argv[])
usage();
} ARGEND
if (!argc || argc > 2 || (argc == 1 && dflag == sflag))
if (!argc || argc > 2 || (dflag == sflag && argc != 2) ||
(dflag && argc != 1))
usage();
set1ranges = makeset(argv[0], &set1, &set1check);
if (argc == 2)
set2ranges = makeset(argv[1], &set2, &set2check);
if (!dflag || (argc == 2 && sflag)) {
set1ranges = makeset(argv[0], &set1, &set1check);
if (argc == 2) {
set2ranges = makeset(argv[1], &set2, &set2check);
/* sanity checks as we are translating */
if (!sflag && !set2ranges && !set2check)
if (!set2ranges && !set2check)
eprintf("cannot map to an empty set.\n");
if (set2check && set2check != islowerrune &&
set2check != isupperrune) {