From: john at keeping.me.uk (John Keeping)
Subject: [PATCH 03/19] cache.c: don't use statically sized buffers for filenames
Date: Sun, 7 Apr 2013 10:29:54 +0100 [thread overview]
Message-ID: <36d473c9ccb9f438f4feedc7b24496cde2712f57.1365326321.git.john@keeping.me.uk> (raw)
In-Reply-To: <cover.1365326321.git.john@keeping.me.uk>
Instead use "struct strbuf" from Git to remove the limit on file path
length.
Signed-off-by: John Keeping <john at keeping.me.uk>
---
cache.c | 56 +++++++++++++++++++-------------------------------------
1 file changed, 19 insertions(+), 37 deletions(-)
diff --git a/cache.c b/cache.c
index 3127fc2..4399ad8 100644
--- a/cache.c
+++ b/cache.c
@@ -312,9 +312,9 @@ int cache_process(int size, const char *path, const char *key, int ttl,
cache_fill_fn fn, void *cbdata)
{
unsigned long hash;
- int len, i;
- char filename[1024];
- char lockname[1024 + 5]; /* 5 = ".lock" */
+ int i;
+ struct strbuf filename = STRBUF_INIT;
+ struct strbuf lockname = STRBUF_INIT;
struct cache_slot slot;
/* If the cache is disabled, just generate the content */
@@ -329,32 +329,23 @@ int cache_process(int size, const char *path, const char *key, int ttl,
fn(cbdata);
return 0;
}
- len = strlen(path);
- if (len > sizeof(filename) - 10) { /* 10 = "/01234567\0" */
- cache_log("[cgit] Cache path too long, caching is disabled: %s\n",
- path);
- fn(cbdata);
- return 0;
- }
if (!key)
key = "";
hash = hash_str(key) % size;
- strcpy(filename, path);
- if (filename[len - 1] != '/')
- filename[len++] = '/';
+ strbuf_addstr(&filename, path);
+ if (filename.buf[filename.len - 1] != '/')
+ strbuf_addch(&filename, '/');
for (i = 0; i < 8; i++) {
- sprintf(filename + len++, "%x",
- (unsigned char)(hash & 0xf));
+ strbuf_addf(&filename, "%x", (unsigned char)(hash & 0xf));
hash >>= 4;
}
- filename[len] = '\0';
- strcpy(lockname, filename);
- strcpy(lockname + len, ".lock");
+ strbuf_addbuf(&lockname, &filename);
+ strbuf_addstr(&lockname, ".lock");
slot.fn = fn;
slot.cbdata = cbdata;
slot.ttl = ttl;
- slot.cache_name = filename;
- slot.lock_name = lockname;
+ slot.cache_name = strbuf_detach(&filename, NULL);
+ slot.lock_name = strbuf_detach(&lockname, NULL);
slot.key = key;
slot.keylen = strlen(key);
return process_slot(&slot);
@@ -381,18 +372,12 @@ int cache_ls(const char *path)
struct dirent *ent;
int err = 0;
struct cache_slot slot;
- char fullname[1024];
- char *name;
+ struct strbuf fullname = STRBUF_INIT;
if (!path) {
cache_log("[cgit] cache path not specified\n");
return -1;
}
- if (strlen(path) > 1024 - 10) {
- cache_log("[cgit] cache path too long: %s\n",
- path);
- return -1;
- }
dir = opendir(path);
if (!dir) {
err = errno;
@@ -400,30 +385,27 @@ int cache_ls(const char *path)
path, strerror(err), err);
return err;
}
- strcpy(fullname, path);
- name = fullname + strlen(path);
- if (*(name - 1) != '/') {
- *name++ = '/';
- *name = '\0';
- }
- slot.cache_name = fullname;
+ strbuf_addstr(&fullname, path);
+ if (fullname.buf[fullname.len - 1] != '/')
+ strbuf_addch(&fullname, '/');
while ((ent = readdir(dir)) != NULL) {
if (strlen(ent->d_name) != 8)
continue;
- strcpy(name, ent->d_name);
+ strbuf_addstr(&fullname, ent->d_name);
if ((err = open_slot(&slot)) != 0) {
cache_log("[cgit] unable to open path %s: %s (%d)\n",
- fullname, strerror(err), err);
+ fullname.buf, strerror(err), err);
continue;
}
printf("%s %s %10"PRIuMAX" %s\n",
- name,
+ fullname.buf,
sprintftime("%Y-%m-%d %H:%M:%S",
slot.cache_st.st_mtime),
(uintmax_t)slot.cache_st.st_size,
slot.buf);
close_slot(&slot);
}
+ slot.cache_name = strbuf_detach(&fullname, NULL);
closedir(dir);
return 0;
}
--
1.8.2.692.g17a9715
next prev parent reply other threads:[~2013-04-07 9:29 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-07 9:29 [PATCH 00/19] Fixed-size buffer removal john
2013-04-07 9:29 ` [PATCH 01/19] Fix out-of-bounds memory accesses with virtual_root="" john
2013-04-07 9:29 ` [PATCH 02/19] Remove redundant calls to fmt("%s", ...) john
2013-04-07 11:05 ` Jason
2013-04-07 11:25 ` john
2013-04-07 11:30 ` Jason
2013-04-07 9:29 ` john [this message]
2013-04-07 11:11 ` [PATCH 03/19] cache.c: don't use statically sized buffers for filenames Jason
2013-04-07 11:30 ` john
2013-04-07 9:29 ` [PATCH 04/19] html: introduce html_txtf and html_vtxtf functions john
2013-04-07 9:29 ` [PATCH 05/19] Convert cgit_print_error to a variadic function john
2013-04-07 9:29 ` [PATCH 06/19] scan-tree: use struct strbuf instead of static buffers john
2013-04-07 11:29 ` Jason
2013-04-07 11:33 ` john
2013-04-07 9:29 ` [PATCH 07/19] ui-log.c: use a strbuf for refs john
2013-04-07 9:29 ` [PATCH 08/19] ui-log.c: use a strbuf for grep arguments john
2013-04-07 9:30 ` [PATCH 09/19] ui-plain.c: use struct strbuf instead of fmt() john
2013-04-07 9:30 ` [PATCH 10/19] ui-refs.c: use struct strbuf instead of fixed-size buffers john
2013-04-07 13:08 ` Jason
2013-04-07 9:30 ` [PATCH 11/19] ui-repolist.c: use struct strbuf for repository paths john
2013-04-07 9:30 ` [PATCH 12/19] ui-snapshot.c: tidy up memory management in write_archive_type john
2013-04-07 9:30 ` [PATCH 13/19] ui-snapshot: use a struct strbuf instead of fixed-size buffers john
2013-04-07 13:25 ` Jason
2013-04-07 13:37 ` john
2013-04-07 13:39 ` Jason
2013-04-07 13:33 ` Jason
2013-04-07 9:30 ` [PATCH 14/19] ui-summary.c: use " john
2013-04-07 12:20 ` Jason
2013-04-07 12:36 ` john
2013-04-07 12:41 ` Jason
2013-04-07 12:43 ` Jason
2013-04-07 9:30 ` [PATCH 15/19] ui-tag.c: use struct strbuf for user-supplied data john
2013-04-07 9:30 ` [PATCH 16/19] ui-tree.c: use struct strbuf instead of fmt() john
2013-04-07 9:30 ` [PATCH 17/19] cgit.c: " john
2013-04-07 9:30 ` [PATCH 18/19] html: add html_attrf to output an attribute value from a format string john
2013-04-07 9:30 ` [PATCH 19/19] ui-shared.c: use struct strbuf instead of fmt() john
2013-04-07 12:37 ` Jason
2013-04-07 12:44 ` john
2013-04-07 12:49 ` cgit
2013-04-07 13:08 ` [PATCH 00/19] Fixed-size buffer removal Jason
2013-04-07 13:14 ` john
2013-04-08 15:31 ` Jason
2013-04-08 17:38 ` john
2013-04-08 18:28 ` Jason
2013-04-07 14:26 ` [PATCH v2 00/22] " john
2013-04-07 14:26 ` [PATCH v2 01/22] Fix out-of-bounds memory accesses with virtual_root="" john
2013-04-07 14:26 ` [PATCH v2 02/22] Mark char* fields in struct cgit_page as const john
2013-04-07 14:26 ` [PATCH v2 03/22] Remove redundant calls to fmt("%s", ...) john
2013-04-07 14:26 ` [PATCH v2 04/22] html.c: add fmtalloc helper john
2013-04-07 14:26 ` [PATCH v2 05/22] shared.c: add strbuf_ensure_end john
2013-04-07 14:26 ` [PATCH v2 06/22] cache.c: don't use statically sized buffers for filenames john
2013-04-07 14:26 ` [PATCH v2 07/22] html: introduce html_txtf and html_vtxtf functions john
2013-04-07 14:26 ` [PATCH v2 08/22] Convert cgit_print_error to a variadic function john
2013-04-07 15:01 ` [PATCH 08/22 v3] " john
2013-04-07 14:26 ` [PATCH v2 09/22] scan-tree: use struct strbuf instead of static buffers john
2013-04-07 14:26 ` [PATCH v2 10/22] ui-log.c: use a strbuf for refs john
2013-04-07 14:26 ` [PATCH v2 11/22] ui-log.c: use a strbuf for grep arguments john
2013-04-07 14:26 ` [PATCH v2 12/22] ui-plain.c: use struct strbuf instead of fmt() john
2013-04-07 14:26 ` [PATCH v2 13/22] ui-refs.c: use struct strbuf instead of fixed-size buffers john
2013-04-07 14:26 ` [PATCH v2 14/22] ui-repolist.c: use struct strbuf for repository paths john
2013-04-07 14:26 ` [PATCH v2 15/22] ui-snapshot.c: tidy up memory management in write_archive_type john
2013-04-07 14:26 ` [PATCH v2 16/22] ui-snapshot: use a struct strbuf instead of fixed-size buffers john
2013-04-07 14:26 ` [PATCH v2 17/22] ui-summary.c: use " john
2013-04-07 14:26 ` [PATCH v2 18/22] ui-tag.c: use struct strbuf for user-supplied data john
2013-04-07 14:26 ` [PATCH v2 19/22] ui-tree.c: use struct strbuf instead of fmt() john
2013-04-07 14:26 ` [PATCH v2 20/22] cgit.c: " john
2013-04-07 14:26 ` [PATCH v2 21/22] html: add html_attrf to output an attribute value from a format string john
2013-04-07 14:26 ` [PATCH v2 22/22] ui-shared.c: use struct strbuf instead of fmt() john
2013-04-07 15:21 ` Jason
2013-04-07 15:43 ` john
2013-04-07 15:46 ` Jason
2013-04-08 10:22 ` cgit
2013-04-08 14:04 ` Jason
2013-04-08 17:40 ` john
2013-04-08 14:23 ` [PATCH 00/19] Fixed-size buffer removal Jason
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