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authorJohn Keeping <john@keeping.me.uk>2015-08-13 11:14:20 +0000
committerJason A. Donenfeld <Jason@zx2c4.com>2015-08-13 13:39:06 +0000
commit0c4d76755b98bb597279a1930bf4c69eca7dde62 (patch)
treef1e816775d42bf989997744eb3d6d95d40c97a5a
parent7105a78b17b118866aee77735e26cffcd1fd08fd (diff)
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filter: don't use dlsym unnecessarily
We only need to hook write() if Lua filter's are in use. If support has been disabled, remove the dependency on dlsym(). Signed-off-by: John Keeping <john@keeping.me.uk>
-rw-r--r--filter.c78
1 files changed, 42 insertions, 36 deletions
diff --git a/filter.c b/filter.c
index c7037a3..949c931 100644
--- a/filter.c
+++ b/filter.c
@@ -8,17 +8,13 @@
#include "cgit.h"
#include "html.h"
-#include <dlfcn.h>
#ifndef NO_LUA
+#include <dlfcn.h>
#include <lua.h>
#include <lualib.h>
#include <lauxlib.h>
#endif
-static ssize_t (*libc_write)(int fd, const void *buf, size_t count);
-static ssize_t (*filter_write)(struct cgit_filter *base, const void *buf, size_t count) = NULL;
-static struct cgit_filter *current_write_filter = NULL;
-
static inline void reap_filter(struct cgit_filter *filter)
{
if (filter && filter->cleanup)
@@ -43,37 +39,6 @@ void cgit_cleanup_filters(void)
}
}
-void cgit_init_filters(void)
-{
- libc_write = dlsym(RTLD_NEXT, "write");
- if (!libc_write)
- die("Could not locate libc's write function");
-}
-
-ssize_t write(int fd, const void *buf, size_t count)
-{
- if (fd != STDOUT_FILENO || !filter_write)
- return libc_write(fd, buf, count);
- return filter_write(current_write_filter, buf, count);
-}
-
-static inline void hook_write(struct cgit_filter *filter, ssize_t (*new_write)(struct cgit_filter *base, const void *buf, size_t count))
-{
- /* We want to avoid buggy nested patterns. */
- assert(filter_write == NULL);
- assert(current_write_filter == NULL);
- current_write_filter = filter;
- filter_write = new_write;
-}
-
-static inline void unhook_write(void)
-{
- assert(filter_write != NULL);
- assert(current_write_filter != NULL);
- filter_write = NULL;
- current_write_filter = NULL;
-}
-
static int open_exec_filter(struct cgit_filter *base, va_list ap)
{
struct cgit_exec_filter *filter = (struct cgit_exec_filter *)base;
@@ -170,7 +135,48 @@ void cgit_exec_filter_init(struct cgit_exec_filter *filter, char *cmd, char **ar
filter->base.argument_count = 0;
}
+#ifdef NO_LUA
+void cgit_init_filters(void)
+{
+}
+#endif
+
#ifndef NO_LUA
+static ssize_t (*libc_write)(int fd, const void *buf, size_t count);
+static ssize_t (*filter_write)(struct cgit_filter *base, const void *buf, size_t count) = NULL;
+static struct cgit_filter *current_write_filter = NULL;
+
+void cgit_init_filters(void)
+{
+ libc_write = dlsym(RTLD_NEXT, "write");
+ if (!libc_write)
+ die("Could not locate libc's write function");
+}
+
+ssize_t write(int fd, const void *buf, size_t count)
+{
+ if (fd != STDOUT_FILENO || !filter_write)
+ return libc_write(fd, buf, count);
+ return filter_write(current_write_filter, buf, count);
+}
+
+static inline void hook_write(struct cgit_filter *filter, ssize_t (*new_write)(struct cgit_filter *base, const void *buf, size_t count))
+{
+ /* We want to avoid buggy nested patterns. */
+ assert(filter_write == NULL);
+ assert(current_write_filter == NULL);
+ current_write_filter = filter;
+ filter_write = new_write;
+}
+
+static inline void unhook_write(void)
+{
+ assert(filter_write != NULL);
+ assert(current_write_filter != NULL);
+ filter_write = NULL;
+ current_write_filter = NULL;
+}
+
struct lua_filter {
struct cgit_filter base;
char *script_file;