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hush: fix hush-bugs/glob_and_vars.tests testcase:
globbing is now done _after_ variable/`cmd` substitution function old new delta expand_strvec_to_strvec 7 353 +346 expand_variables 1348 1383 +35 add_string_to_strings - 28 +28 globhack 114 - -114 done_word 778 579 -199 ------------------------------------------------------------------------------ (add/remove: 1/1 grow/shrink: 2/1 up/down: 409/-313) Total: 96 bytes
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31e1286365
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109
shell/hush.c
109
shell/hush.c
@ -481,10 +481,6 @@ static int run_list(struct pipe *pi);
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static void pseudo_exec_argv(char **ptrs2free, char **argv) ATTRIBUTE_NORETURN;
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static void pseudo_exec(char **ptrs2free, struct child_prog *child) ATTRIBUTE_NORETURN;
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static int run_pipe(struct pipe *pi);
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/* extended glob support: */
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static char **globhack(const char *src, char **strings);
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static int glob_needed(const char *s);
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static int xglob(o_string *dest, char ***pglob);
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/* variable assignment: */
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static int is_assignment(const char *s);
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/* data structure manipulation: */
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@ -591,6 +587,17 @@ static char **alloc_ptrs(char **argv)
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}
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#endif
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#ifdef DEBUG_EXPAND
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static void debug_print_strings(const char *prefix, char **vv)
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{
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fprintf(stderr, "%s:\n", prefix);
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while (*vv)
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fprintf(stderr, " '%s'\n", *vv++);
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}
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#else
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#define debug_print_strings(prefix, vv) ((void)0)
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#endif
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/* Function prototypes for builtins */
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static int builtin_cd(char **argv);
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@ -2280,7 +2287,9 @@ static int run_list(struct pipe *pi)
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if (!pi->next->progs->argv)
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continue;
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/* create list of variable values */
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debug_print_strings("for_list made from", pi->next->progs->argv);
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for_list = expand_strvec_to_strvec(pi->next->progs->argv);
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debug_print_strings("for_list", for_list);
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for_lcur = for_list;
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for_varname = pi->progs->argv[0];
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pi->progs->argv[0] = NULL;
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@ -2465,13 +2474,10 @@ static int run_and_free_list(struct pipe *pi)
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return rcode;
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}
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/* The API for glob is arguably broken. This routine pushes a non-matching
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* string into the output structure, removing non-backslashed backslashes.
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* If someone can prove me wrong, by performing this function within the
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* original glob(3) api, feel free to rewrite this routine into oblivion.
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/* Remove non-backslashed backslashes and add to "strings" vector.
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* XXX broken if the last character is '\\', check that before calling.
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*/
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static char **globhack(const char *src, char **strings)
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static char **add_unq_string_to_strings(char **strings, const char *src)
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{
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int cnt;
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const char *s;
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@ -2503,33 +2509,20 @@ static int glob_needed(const char *s)
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return 0;
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}
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static int xglob(o_string *dest, char ***pglob)
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static int xglob(char ***pglob, const char *pattern)
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{
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/* short-circuit for null word */
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/* we can code this better when the debug_printf's are gone */
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if (dest->length == 0) {
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if (dest->nonnull) {
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/* bash man page calls this an "explicit" null */
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*pglob = globhack(dest->data, *pglob);
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}
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return 0;
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}
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if (glob_needed(dest->data)) {
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if (glob_needed(pattern)) {
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glob_t globdata;
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int gr;
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memset(&globdata, 0, sizeof(globdata));
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gr = glob(dest->data, 0, NULL, &globdata);
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gr = glob(pattern, 0, NULL, &globdata);
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debug_printf("glob returned %d\n", gr);
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if (gr == GLOB_NOSPACE)
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bb_error_msg_and_die("out of memory during glob");
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if (gr == GLOB_NOMATCH) {
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debug_printf("globhack returned %d\n", gr);
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/* quote removal, or more accurately, backslash removal */
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*pglob = globhack(dest->data, *pglob);
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globfree(&globdata);
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return 0;
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goto literal;
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}
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if (gr != 0) { /* GLOB_ABORTED ? */
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bb_error_msg("glob(3) error %d", gr);
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@ -2540,7 +2533,10 @@ static int xglob(o_string *dest, char ***pglob)
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return gr;
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}
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*pglob = globhack(dest->data, *pglob);
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literal:
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/* quote removal, or more accurately, backslash removal */
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*pglob = add_unq_string_to_strings(*pglob, pattern);
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debug_print_strings("after xglob", *pglob);
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return 0;
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}
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@ -2733,7 +2729,7 @@ static char **expand_variables(char **argv, char or_mask)
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n = expand_vars_to_list(&output, n, *v++, or_mask);
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o_debug_list("expand_variables", &output, n);
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/* output.data (malloced) gets returned in "list" */
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/* output.data (malloced in one block) gets returned in "list" */
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list = o_finalize_list(&output, n);
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#ifdef DEBUG_EXPAND
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@ -2750,9 +2746,27 @@ static char **expand_variables(char **argv, char or_mask)
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static char **expand_strvec_to_strvec(char **argv)
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{
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return expand_variables(argv, 0);
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char **exp;
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char **res = NULL;
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debug_print_strings("expand_strvec_to_strvec: pre expand", argv);
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exp = argv = expand_variables(argv, 0);
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debug_print_strings("expand_strvec_to_strvec: post expand", argv);
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while (*argv) {
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int r = xglob(&res, *argv);
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if (r)
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bb_error_msg("xglob returned %d on '%s'", r, *argv);
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//TODO: testcase for bad glob pattern behavior
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argv++;
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}
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free(exp);
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debug_print_strings("expand_strvec_to_strvec: res", res);
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return res;
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}
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/* used for expansion of right hand of assignments */
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/* NB: should NOT do globbing! "export v=/bin/c*; env | grep ^v=" outputs
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* "v=/bin/c*" */
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static char *expand_string_to_string(const char *str)
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{
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char *argv[2], **list;
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@ -2769,6 +2783,7 @@ static char *expand_string_to_string(const char *str)
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return (char*)list;
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}
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/* used for eval */
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static char* expand_strvec_to_string(char **argv)
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{
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char **list;
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@ -3106,7 +3121,6 @@ static int done_word(o_string *word, struct p_context *ctx)
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{
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struct child_prog *child = ctx->child;
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char ***glob_target;
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int gr;
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debug_printf_parse("done_word entered: '%s' %p\n", word->data, child);
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if (word->length == 0 && !word->nonnull) {
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@ -3131,12 +3145,10 @@ static int done_word(o_string *word, struct p_context *ctx)
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}
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glob_target = &child->argv;
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}
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//BUG! globbing should be done after variable expansion!
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//See glob_and_vars testcase
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gr = xglob(word, glob_target);
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if (gr != 0) {
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debug_printf_parse("done_word return 1: xglob returned %d\n", gr);
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return 1;
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if (word->length || word->nonnull) {
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*glob_target = add_string_to_strings(*glob_target, xstrdup(word->data));
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debug_print_strings("glob_target appended", *glob_target);
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}
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o_reset(word);
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@ -3371,6 +3383,11 @@ static int process_command_subs(o_string *dest,
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o_addQchr(dest, '\n');
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eol_cnt--;
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}
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/* Even unquoted `echo '\'` results in two backslashes
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* (which are converted into one by globbing later) */
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if (!dest->o_quote && ch == '\\') {
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o_addchr(dest, ch);
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}
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o_addQchr(dest, ch);
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}
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@ -3440,7 +3457,7 @@ static void add_till_single_quote(o_string *dest, struct in_str *input)
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break;
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if (ch == '\'')
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break;
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o_addqchr(dest, ch);
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o_addchr(dest, ch);
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}
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}
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/* "...\"...`..`...." - do we need to handle "...$(..)..." too? */
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@ -3451,15 +3468,15 @@ static void add_till_double_quote(o_string *dest, struct in_str *input)
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if (ch == '"')
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break;
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if (ch == '\\') { /* \x. Copy both chars. */
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o_addqchr(dest, ch);
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o_addchr(dest, ch);
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ch = i_getch(input);
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}
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if (ch == EOF)
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break;
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o_addqchr(dest, ch);
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o_addchr(dest, ch);
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if (ch == '`') {
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add_till_backquote(dest, input);
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o_addqchr(dest, ch);
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o_addchr(dest, ch);
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continue;
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}
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//if (ch == '$') ...
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@ -3488,12 +3505,12 @@ static void add_till_backquote(o_string *dest, struct in_str *input)
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if (ch == '\\') { /* \x. Copy both chars unless it is \` */
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int ch2 = i_getch(input);
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if (ch2 != '`' && ch2 != '$' && ch2 != '\\')
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o_addqchr(dest, ch);
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o_addchr(dest, ch);
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ch = ch2;
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}
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if (ch == EOF)
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break;
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o_addqchr(dest, ch);
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o_addchr(dest, ch);
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}
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}
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/* Process $(cmd) - copy contents until ")" is seen. Complicated by
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@ -3520,22 +3537,22 @@ static void add_till_closing_curly_brace(o_string *dest, struct in_str *input)
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if (ch == ')')
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if (--count < 0)
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break;
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o_addqchr(dest, ch);
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o_addchr(dest, ch);
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if (ch == '\'') {
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add_till_single_quote(dest, input);
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o_addqchr(dest, ch);
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o_addchr(dest, ch);
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continue;
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}
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if (ch == '"') {
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add_till_double_quote(dest, input);
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o_addqchr(dest, ch);
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o_addchr(dest, ch);
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continue;
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}
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if (ch == '\\') { /* \x. Copy verbatim. Important for \(, \) */
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ch = i_getch(input);
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if (ch == EOF)
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break;
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o_addqchr(dest, ch);
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o_addchr(dest, ch);
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continue;
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}
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}
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1
shell/hush_test/hush-bugs/empty_for.right
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1
shell/hush_test/hush-bugs/empty_for.right
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@ -0,0 +1 @@
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OK: 0
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3
shell/hush_test/hush-bugs/empty_for.tests
Executable file
3
shell/hush_test/hush-bugs/empty_for.tests
Executable file
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false
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for a in; do echo "HELLO"; done
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echo OK: $?
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@ -1,2 +1,2 @@
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v=.
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echo $v/glob_and_vars.*
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echo $v/glob_and_vars.[tr]*
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2
shell/hush_test/hush-vars/glob_and_vars.tests
Executable file
2
shell/hush_test/hush-vars/glob_and_vars.tests
Executable file
@ -0,0 +1,2 @@
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v=.
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echo $v/glob_and_vars.[tr]*
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