This patch uses dynarray at glob internal glob_in_dir function to manage
the various matched patterns. It simplify and removes all the boilerplate
buffer managements required. It also removes the glob_use_alloca, since
it is not used anymore.
Checked on x86_64-linux-gnu.
---
posix/glob.c | 126 +++++++++++++++------------------------------------
1 file changed, 37 insertions(+), 89 deletions(-)
diff --git a/posix/glob.c b/posix/glob.c
index d734ca977c..d199204931 100644
--- a/posix/glob.c
+++ b/posix/glob.c
@@ -1203,6 +1203,21 @@ prefix_array (const char *dirname, char **array, size_t
n)
return 0;
}
+struct globnames_result
+{
+ char **names;
+ size_t length;
+};
+
+/* Create a dynamic array for C string representing the glob name found. */
+#define DYNARRAY_STRUCT globnames_array
+#define DYNARRAY_ELEMENT_FREE(ptr) free (*ptr)
+#define DYNARRAY_ELEMENT char *
+#define DYNARRAY_PREFIX globnames_array_
+#define DYNARRAY_FINAL_TYPE struct globnames_result
+#define DYNARRAY_INITIAL_SIZE 64
+#include <malloc/dynarray-skeleton.c>
+
/* Like 'glob', but PATTERN is a final pathname component,
and matches are searched for in DIRECTORY.
The GLOB_NOSORT bit in FLAGS is ignored. No sorting is ever done.
@@ -1213,25 +1228,13 @@ glob_in_dir (const char *pattern, const char
*directory, int flags,
glob_t *pglob, size_t alloca_used)
{
void *stream = NULL;
-# define GLOBNAMES_MEMBERS(nnames) \
- struct globnames *next; size_t count; char *name[nnames];
- struct globnames { GLOBNAMES_MEMBERS (FLEXIBLE_ARRAY_MEMBER) };
- struct { GLOBNAMES_MEMBERS (64) } init_names_buf;
- struct globnames *init_names = (struct globnames *) &init_names_buf;
- struct globnames *names = init_names;
- struct globnames *names_alloca = init_names;
+ struct globnames_array globnames;
size_t nfound = 0;
- size_t cur = 0;
int meta;
int save;
int result;
- alloca_used += sizeof init_names_buf;
-
- init_names->next = NULL;
- init_names->count = ((sizeof init_names_buf
- - offsetof (struct globnames, name))
- / sizeof init_names->name[0]);
+ globnames_array_init (&globnames);
meta = __glob_pattern_type (pattern, !(flags & GLOB_NOESCAPE));
if (meta == GLOBPAT_NONE && (flags & (GLOB_NOCHECK|GLOB_NOMAGIC)))
@@ -1308,34 +1311,10 @@ glob_in_dir (const char *pattern, const char
*directory, int flags,
if (fnmatch (pattern, d.name, fnm_flags) == 0)
{
- if (cur == names->count)
- {
- struct globnames *newnames;
- size_t count = names->count * 2;
- size_t nameoff = offsetof (struct globnames, name);
- size_t size = FLEXSIZEOF (struct globnames, name,
- count * sizeof (char *));
- if ((SIZE_MAX - nameoff) / 2 / sizeof (char *)
- < names->count)
- goto memory_error;
- if (glob_use_alloca (alloca_used, size))
- newnames = names_alloca
- = alloca_account (size, alloca_used);
- else if ((newnames = malloc (size))
- == NULL)
- goto memory_error;
- newnames->count = count;
- newnames->next = names;
- names = newnames;
- cur = 0;
- }
- names->name[cur] = strdup (d.name);
- if (names->name[cur] == NULL)
- goto memory_error;
- ++cur;
- ++nfound;
- if (SIZE_MAX - pglob->gl_offs <= nfound)
+ globnames_array_add (&globnames, strdup (d.name));
+ if (globnames_array_has_failed (&globnames))
goto memory_error;
+ nfound++;
}
}
}
@@ -1345,10 +1324,13 @@ glob_in_dir (const char *pattern, const char
*directory, int flags,
{
size_t len = strlen (pattern);
nfound = 1;
- names->name[cur] = malloc (len + 1);
- if (names->name[cur] == NULL)
+ char *newp = malloc (len + 1);
+ if (newp == NULL)
goto memory_error;
- *((char *) mempcpy (names->name[cur++], pattern, len)) = '\0';
+ *((char *) mempcpy (newp, pattern, len)) = '\0';
+ globnames_array_add (&globnames, newp);
+ if (globnames_array_has_failed (&globnames))
+ goto memory_error;
}
result = GLOB_NOMATCH;
@@ -1369,59 +1351,25 @@ glob_in_dir (const char *pattern, const char
*directory, int flags,
if (new_gl_pathv == NULL)
{
memory_error:
- while (1)
- {
- struct globnames *old = names;
- for (size_t i = 0; i < cur; ++i)
- free (names->name[i]);
- names = names->next;
- /* NB: we will not leak memory here if we exit without
- freeing the current block assigned to OLD. At least
- the very first block is always allocated on the stack
- and this is the block assigned to OLD here. */
- if (names == NULL)
- {
- assert (old == init_names);
- break;
- }
- cur = names->count;
- if (old == names_alloca)
- names_alloca = names;
- else
- free (old);
- }
+ globnames_array_free (&globnames);
result = GLOB_NOSPACE;
}
else
{
- while (1)
+ struct globnames_result ret = { .names = 0, .length = -1 };
+ if (!globnames_array_finalize (&globnames, &ret))
+ result = GLOB_NOSPACE;
+ else
{
- struct globnames *old = names;
- for (size_t i = 0; i < cur; ++i)
+ for (size_t i = 0; i < ret.length; ++i)
new_gl_pathv[pglob->gl_offs + pglob->gl_pathc++]
- = names->name[i];
- names = names->next;
- /* NB: we will not leak memory here if we exit without
- freeing the current block assigned to OLD. At least
- the very first block is always allocated on the stack
- and this is the block assigned to OLD here. */
- if (names == NULL)
- {
- assert (old == init_names);
- break;
- }
- cur = names->count;
- if (old == names_alloca)
- names_alloca = names;
- else
- free (old);
+ = ret.names[i];
+ pglob->gl_pathv = new_gl_pathv;
+ pglob->gl_pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
+ pglob->gl_flags = flags;
}
- pglob->gl_pathv = new_gl_pathv;
-
- pglob->gl_pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
-
- pglob->gl_flags = flags;
+ free (ret.names);
}
}
--
2.25.1
