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authorUlrich Drepper <drepper@redhat.com>1998-03-13 17:02:23 +0000
committerUlrich Drepper <drepper@redhat.com>1998-03-13 17:02:23 +0000
commit14c44e2ec42a3c973e268add83a11e3e5fb0b80c (patch)
tree9b5d83d08dc977b0e6c97b7e977b591ef7bd47f3 /posix/wordexp.c
parenta7b591dc310c675cb325db9850f10c2e2fe1aba7 (diff)
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Update.
1998-03-13 16:55 Ulrich Drepper <drepper@cygnus.com> * string/tester.c (test_strpbrk): Add more strpbrk tests. (test_strsep): Likewise. Correct horrible bugs. * string/bits/string2.h (strcspn): Optimize also reject string of length 2 and 3. (strspn): Likewise. (strpbrk): Likewise. (strsep): Likewise. Correct bug with successive separators and separators at the end of the string. * sysdeps/generic/strsep.c: Correct bug with successive separators and separators at the end of the string. 1998-03-13 13:11 Tim Waugh <tim@cyberelk.demon.co.uk> * posix/wordexp.c (parse_param): Positional parameters ($1, $2 etc) now handled, as well as $$ (pid). * posix/Makefile (tests): Execute wordexp-test.sh for `make check'. (distribute): Add wordexp-tst.sh. * posix/wordexp-tst.sh: New file. * posix/wordexp.c (parse_param): $# (or ${#}) expands to the number of positional parameters. Renamed substitute_length to seen_hash. Don't free(env) is env is NULL. 1998-03-13 16:50 Ulrich Drepper <drepper@cygnus.com> * libc.map: Add pthread_attr_init to GLIBC_2.1. 1998-03-13 15:01 Ulrich Drepper <drepper@cygnus.com> * gmon/gmon.c: Allow GMON_OUT_PREFIX variable to specify filename for output file replacing gmon.out. Patch by Dean Gaudet <dgaudet@arctic.org>. 1998-03-12 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * elf/dl-misc.c (_dl_debug_message): Fix printing of pid. Clean up namespace. Optimize finding end of line. 1998-03-12 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * elf/rtld.c (process_envvars): Ignore LD_DEBUG_OUTPUT if running securely. Optimized. (process_dl_debug): Add ':' to list of separators. Optimized. 1998-03-13 10:25 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
Diffstat (limited to 'posix/wordexp.c')
-rw-r--r--posix/wordexp.c135
1 files changed, 104 insertions, 31 deletions
diff --git a/posix/wordexp.c b/posix/wordexp.c
index a72a677101..0c89e02234 100644
--- a/posix/wordexp.c
+++ b/posix/wordexp.c
@@ -48,7 +48,8 @@
* This is a recursive-descent-style word expansion routine.
*/
-/* This variable is defined and initialized in the startup code. */
+/* These variables are defined and initialized in the startup code. */
+extern int __libc_argc;
extern char **__libc_argv;
/* Some forward declarations */
@@ -1016,9 +1017,8 @@ parse_param (char **word, size_t *word_length, size_t *max_length,
enum remove_pattern_enum remove = RP_NONE;
int colon_seen = 0;
int depth = 0;
- int substitute_length = 0;
+ int seen_hash = 0;
int error;
- int star = 0;
for (; words[*offset]; ++(*offset))
{
@@ -1066,7 +1066,14 @@ parse_param (char **word, size_t *word_length, size_t *max_length,
goto envsubst;
case '#':
- /* '#' only has special meaning inside braces */
+ /* '#' only has special meaning inside braces or as the very
+ * first character after $ */
+ if (*offset == start)
+ {
+ seen_hash = 1;
+ goto envsubst;
+ }
+
if (words[start] != '{')
{
/* Evaluate */
@@ -1078,10 +1085,10 @@ parse_param (char **word, size_t *word_length, size_t *max_length,
/* At the start? (i.e. 'string length') */
if (*offset == start + 1)
{
- substitute_length = 1;
+ seen_hash = 1;
break;
}
- else if (substitute_length)
+ else if (seen_hash)
goto syntax;
/* Separating variable name from prefix pattern? */
@@ -1158,7 +1165,7 @@ parse_param (char **word, size_t *word_length, size_t *max_length,
if (!env || !*env)
goto syntax;
- if (substitute_length)
+ if (seen_hash)
goto syntax;
if (action != '\0' || remove != RP_NONE)
@@ -1206,22 +1213,29 @@ parse_param (char **word, size_t *word_length, size_t *max_length,
break;
}
-
- star = strchr ("*@", words[*offset]) != NULL;
- if (isalnum (words[*offset]) || star)
+ else
{
- env = w_addchar (env, &env_length, &env_maxlen, words[*offset]);
- if (env == NULL)
- goto no_space;
+ int special = (strchr ("*@$", words[*offset]) != NULL
+ || isdigit (words[*offset]));
- if (star)
- goto envsubst;
+ if (isalpha (words[*offset]) || special)
+ {
+ env = w_addchar (env, &env_length, &env_maxlen,
+ words[*offset]);
+ if (env == NULL)
+ goto no_space;
- break;
- }
+ if (special && words[start] != '{')
+ goto envsubst;
- --(*offset);
- goto envsubst;
+ /* Keep going (get next char) */
+ break;
+ }
+
+ /* Stop and evaluate, remembering char we stopped at */
+ --(*offset);
+ goto envsubst;
+ }
}
}
@@ -1235,28 +1249,76 @@ envsubst:
if (!env || !*env)
{
- *offset = start - 1;
- *word = w_addchar (*word, word_length, max_length, '$');
- free (env);
+ if (seen_hash)
+ {
+ /* $# expands to the number of positional parameters */
+ char buffer[21];
+ buffer[20] = '\0';
+ *word = w_addstr (*word, word_length, max_length,
+ _itoa_word (__libc_argc - 1, &buffer[20], 10, 0));
+ }
+ else
+ {
+ /* Just $ on its own */
+ *offset = start - 1;
+ *word = w_addchar (*word, word_length, max_length, '$');
+ }
+
+ if (env)
+ free (env);
+
return *word ? 0 : WRDE_NOSPACE;
}
- /* Is it `$*' or `$@' ? */
- if (strpbrk (env, "*@") != NULL)
+ /* Is it a special parameter? */
+ if (strpbrk (env, "0123456789*@$"))
{
- size_t plist_len = 1;
- int p;
-
- if (env[1] != '\0')
+ if (env[1])
{
/* Bad substitution if there is more than one character */
+ free (env);
fprintf (stderr, "${%s}: bad substitution\n", env);
return WRDE_SYNTAX;
}
- if (!quoted || *env == '*')
+ /* Is it a digit? */
+ if (isdigit(*env))
+ {
+ int n = *env - '0';
+ char *param;
+
+ free (env);
+ if (n >= __libc_argc)
+ /* Substitute NULL */
+ return 0;
+
+ /* Replace with the appropriate positional parameter */
+ param = __strdup (__libc_argv[n]);
+ if (!param)
+ return WRDE_NOSPACE;
+
+ *word = w_addstr (*word, word_length, max_length, param);
+ return *word ? 0 : WRDE_NOSPACE;
+ }
+ /* Is it `$$' ? */
+ else if (*env == '$')
+ {
+ char pidstr[21];
+
+ free (env);
+ pidstr[20] = '\0';
+ *word = w_addstr (*word, word_length, max_length,
+ _itoa_word (getpid(), &pidstr[20], 10, 0));
+ return *word ? 0 : WRDE_NOSPACE;
+ }
+ /* Is it `$*' or `$@' (unquoted) ? */
+ else if (*env == '*' || (*env == '@' && !quoted))
{
+ size_t plist_len = 1;
+ int p;
+
/* Build up value parameter by parameter (copy them) */
+ free (env);
for (p = 1; __libc_argv[p]; ++p)
{
char *old_pointer = value;
@@ -1287,8 +1349,15 @@ envsubst:
if (value)
goto maybe_fieldsplit;
+
+ return 0;
}
+ /* Must be a quoted `$@' */
+ assert (*env == '@');
+ assert (quoted);
+ free (env);
+
/* Each parameter is a separate word ("$@") */
if (__libc_argv[0] == NULL)
{
@@ -1300,13 +1369,14 @@ envsubst:
}
else
{
+ int p;
+
for (p = 1; __libc_argv[p + 1]; p++)
{
char *copy = __strdup (__libc_argv[p]);
if (copy == NULL)
return WRDE_NOSPACE;
- strcpy (copy, __libc_argv[p]);
error = w_addword (pwordexp, copy);
if (error)
{
@@ -1319,6 +1389,9 @@ envsubst:
if (__libc_argv[p])
{
*word = __strdup (__libc_argv[p]);
+ if (*word == NULL)
+ return WRDE_NOSPACE;
+
*max_length = *word_length = strlen (*word);
}
}
@@ -1584,7 +1657,7 @@ envsubst:
return 0;
}
- if (substitute_length)
+ if (seen_hash)
{
char param_length[21];
param_length[20] = '\0';