diff options
Diffstat (limited to 'posix')
| -rw-r--r-- | posix/wordexp-test.c | 19 | ||||
| -rw-r--r-- | posix/wordexp.c | 67 |
2 files changed, 45 insertions, 41 deletions
diff --git a/posix/wordexp-test.c b/posix/wordexp-test.c index d73021cc2e..19048dca88 100644 --- a/posix/wordexp-test.c +++ b/posix/wordexp-test.c @@ -38,12 +38,21 @@ struct test_case_struct const char *ifs; } test_case[] = { - /* Simple field-splitting */ + /* Simple word- and field-splitting */ { 0, NULL, "one", 0, 1, { "one", }, IFS }, { 0, NULL, "one two", 0, 2, { "one", "two", }, IFS }, { 0, NULL, "one two three", 0, 3, { "one", "two", "three", }, IFS }, { 0, NULL, " \tfoo\t\tbar ", 0, 2, { "foo", "bar", }, IFS }, - { 0, NULL, " red , white blue", 0, 3, { "red", "white", "blue", }, ", \n\t" }, + { 0, NULL, "red , white blue", 0, 4, { "red", " ", "white", "blue", }, " ," }, + { 0, NULL, "one two three", 0, 3, { "one", "two", "three", }, "" }, + { 0, NULL, "one \"two three\"", 0, 2, { "one", "two three", }, IFS }, + { 0, NULL, "one \"two three\"", 0, 2, { "one", "two three", }, "" }, + { 0, "two three", "one \"$var\"", 0, 2, { "one", "two three", }, IFS }, + { 0, "two three", "one $var", 0, 3, { "one", "two", "three", }, IFS }, + { 0, "two three", "one \"$var\"", 0, 2, { "one", "two three", }, "" }, + { 0, "two three", "one $var", 0, 2, { "one", "two three", }, "" }, + { 0, ":abc:", "$var", 0, 2, { "", "abc", }, ":" }, /* cf. bash */ + { 0, NULL, ":abc:", 0, 1, { " abc ", }, ":" }, /* Simple parameter expansion */ { 0, "foo", "${var}", 0, 1, { "foo", }, IFS }, @@ -120,9 +129,9 @@ struct test_case_struct { 0, "o thr", "*$var*", 0, 2, { "two", "three" }, IFS }, /* Different IFS values */ - { 0, NULL, "a b\tc\nd ", 0, 4, { "a", "b", "c", "d" }, NULL /* unset */ }, - { 0, NULL, "a b\tc d ", 0, 1, { "a b\tc d " }, "" /* `null' */ }, - { 0, NULL, "a,b c\n, d", 0, 3, { "a", "b c", " d" }, "\t\n," }, + { 0, "a b\tc\nd ", "$var", 0, 4, { "a", "b", "c", "d" }, NULL /* unset */ }, + { 0, "a b\tc d ", "$var", 0, 1, { "a b\tc d " }, "" /* `null' */ }, + { 0, "a,b c\n, d", "$var", 0, 3, { "a", "b c", " d" }, "\t\n," }, /* Other things that should succeed */ { 0, NULL, "\\*\"|&;<>\"\\(\\)\\{\\}", 0, 1, { "*|&;<>(){}", }, IFS }, diff --git a/posix/wordexp.c b/posix/wordexp.c index 0eb0721230..942a9ac70d 100644 --- a/posix/wordexp.c +++ b/posix/wordexp.c @@ -159,6 +159,16 @@ w_addword (wordexp_t *pwordexp, char *word) size_t num_p; char **new_wordv; + /* Internally, NULL acts like "". Convert NULLs to "" before + * the caller sees them. + */ + if (word == NULL) + { + word = __strdup (""); + if (word == NULL) + goto no_space; + } + num_p = 2 + pwordexp->we_wordc + pwordexp->we_offs; new_wordv = realloc (pwordexp->we_wordv, sizeof (char *) * num_p); if (new_wordv != NULL) @@ -169,6 +179,7 @@ w_addword (wordexp_t *pwordexp, char *word) return 0; } +no_space: return WRDE_NOSPACE; } @@ -1759,7 +1770,7 @@ envsubst: /* Tag a copy onto the current word */ *word = w_addstr (*word, word_length, max_length, field_begin); - if (*word == NULL) + if (*word == NULL && *field_begin != '\0') { free (value_copy); return WRDE_NOSPACE; @@ -2160,11 +2171,13 @@ wordexp (const char *words, wordexp_t *pwordexp, int flags) break; default: - /* Is it a field separator? */ - if (strchr (ifs, words[words_offset]) == NULL) + /* Is it a word separator? */ + if (strchr (" \t", words[words_offset]) == NULL) { - /* Not a field separator -- but is it a valid word char? */ - if (strchr ("\n|&;<>(){}", words[words_offset])) + char ch = words[words_offset]; + + /* Not a word separator -- but is it a valid word char? */ + if (strchr ("\n|&;<>(){}", ch)) { /* Fail */ wordfree (pwordexp); @@ -2175,8 +2188,12 @@ wordexp (const char *words, wordexp_t *pwordexp, int flags) /* "Ordinary" character -- add it to word */ + /* Convert IFS chars to blanks -- bash does this */ + if (strchr (ifs, ch)) + ch = ' '; + word = w_addchar (word, &word_length, &max_length, - words[words_offset]); + ch); if (word == NULL) { error = WRDE_NOSPACE; @@ -2186,34 +2203,12 @@ wordexp (const char *words, wordexp_t *pwordexp, int flags) break; } - /* Field separator */ - if (strchr (ifs_white, words[words_offset])) - { - /* It's a whitespace IFS char. Ignore it at the beginning - of a line and ignore multiple instances. */ - if (!word || !*word) - break; - - if (w_addword (pwordexp, word) == WRDE_NOSPACE) - { - error = WRDE_NOSPACE; - goto do_error; - } - - word = w_newword (&word_length, &max_length); - break; - } - - /* It's a non-whitespace IFS char */ - - /* Multiple non-whitespace IFS chars are treated as one. */ + /* If a word has been delimited, add it to the list. */ if (word != NULL) { - if (w_addword (pwordexp, word) == WRDE_NOSPACE) - { - error = WRDE_NOSPACE; - goto do_error; - } + error = w_addword (pwordexp, word); + if (error) + goto do_error; } word = w_newword (&word_length, &max_length); @@ -2221,7 +2216,7 @@ wordexp (const char *words, wordexp_t *pwordexp, int flags) /* End of string */ - /* There was a field separator at the end */ + /* There was a word separator at the end */ if (word == NULL) return 0; @@ -2234,12 +2229,12 @@ do_error: * set we_wordc and wd_wordv back to what they were. */ - if (error == WRDE_NOSPACE) - return WRDE_NOSPACE; - if (word != NULL) free (word); + if (error == WRDE_NOSPACE) + return WRDE_NOSPACE; + wordfree (pwordexp); pwordexp->we_wordv = old_wordv; pwordexp->we_wordc = old_wordc; |