*/
#include "cgit.h"
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <unistd.h>
-#include <string.h>
-#include <stdlib.h>
+#include "html.h"
+#ifndef NO_LUA
#include <dlfcn.h>
-
-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;
+#include <lua.h>
+#include <lualib.h>
+#include <lauxlib.h>
+#endif
static inline void reap_filter(struct cgit_filter *filter)
{
reap_filter(ctx.cfg.about_filter);
reap_filter(ctx.cfg.commit_filter);
reap_filter(ctx.cfg.source_filter);
+ reap_filter(ctx.cfg.email_filter);
+ reap_filter(ctx.cfg.owner_filter);
+ reap_filter(ctx.cfg.auth_filter);
for (i = 0; i < cgit_repolist.count; ++i) {
reap_filter(cgit_repolist.repos[i].about_filter);
reap_filter(cgit_repolist.repos[i].commit_filter);
reap_filter(cgit_repolist.repos[i].source_filter);
+ reap_filter(cgit_repolist.repos[i].email_filter);
+ reap_filter(cgit_repolist.repos[i].owner_filter);
}
}
-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()
-{
- 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;
+ struct cgit_exec_filter *filter = (struct cgit_exec_filter *)base;
+ int pipe_fh[2];
int i;
for (i = 0; i < filter->base.argument_count; i++)
- filter->argv[i+1] = va_arg(ap, char *);
+ filter->argv[i + 1] = va_arg(ap, char *);
filter->old_stdout = chk_positive(dup(STDOUT_FILENO),
"Unable to duplicate STDOUT");
- chk_zero(pipe(filter->pipe_fh), "Unable to create pipe to subprocess");
+ chk_zero(pipe(pipe_fh), "Unable to create pipe to subprocess");
filter->pid = chk_non_negative(fork(), "Unable to create subprocess");
if (filter->pid == 0) {
- close(filter->pipe_fh[1]);
- chk_non_negative(dup2(filter->pipe_fh[0], STDIN_FILENO),
+ close(pipe_fh[1]);
+ chk_non_negative(dup2(pipe_fh[0], STDIN_FILENO),
"Unable to use pipe as STDIN");
execvp(filter->cmd, filter->argv);
die_errno("Unable to exec subprocess %s", filter->cmd);
}
- close(filter->pipe_fh[0]);
- chk_non_negative(dup2(filter->pipe_fh[1], STDOUT_FILENO),
+ close(pipe_fh[0]);
+ chk_non_negative(dup2(pipe_fh[1], STDOUT_FILENO),
"Unable to use pipe as STDOUT");
- close(filter->pipe_fh[1]);
+ close(pipe_fh[1]);
return 0;
}
static int close_exec_filter(struct cgit_filter *base)
{
- struct cgit_exec_filter *filter = (struct cgit_exec_filter *) base;
- int i, exit_status;
+ struct cgit_exec_filter *filter = (struct cgit_exec_filter *)base;
+ int i, exit_status = 0;
chk_non_negative(dup2(filter->old_stdout, STDOUT_FILENO),
"Unable to restore STDOUT");
if (filter->pid < 0)
goto done;
waitpid(filter->pid, &exit_status, 0);
- if (WIFEXITED(exit_status) && !WEXITSTATUS(exit_status))
+ if (WIFEXITED(exit_status))
goto done;
die("Subprocess %s exited abnormally", filter->cmd);
done:
for (i = 0; i < filter->base.argument_count; i++)
- filter->argv[i+1] = NULL;
- return 0;
+ filter->argv[i + 1] = NULL;
+ return WEXITSTATUS(exit_status);
}
static void fprintf_exec_filter(struct cgit_filter *base, FILE *f, const char *prefix)
{
- struct cgit_exec_filter *filter = (struct cgit_exec_filter *) base;
+ struct cgit_exec_filter *filter = (struct cgit_exec_filter *)base;
fprintf(f, "%sexec:%s\n", prefix, filter->cmd);
}
static void cleanup_exec_filter(struct cgit_filter *base)
{
- struct cgit_exec_filter *filter = (struct cgit_exec_filter *) base;
+ struct cgit_exec_filter *filter = (struct cgit_exec_filter *)base;
if (filter->argv) {
free(filter->argv);
filter->argv = NULL;
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;
+ lua_State *lua_state;
+};
+
+static void error_lua_filter(struct lua_filter *filter)
+{
+ die("Lua error in %s: %s", filter->script_file, lua_tostring(filter->lua_state, -1));
+ lua_pop(filter->lua_state, 1);
+}
+
+static ssize_t write_lua_filter(struct cgit_filter *base, const void *buf, size_t count)
+{
+ struct lua_filter *filter = (struct lua_filter *)base;
+
+ lua_getglobal(filter->lua_state, "filter_write");
+ lua_pushlstring(filter->lua_state, buf, count);
+ if (lua_pcall(filter->lua_state, 1, 0, 0)) {
+ error_lua_filter(filter);
+ errno = EIO;
+ return -1;
+ }
+ return count;
+}
+
+static inline int hook_lua_filter(lua_State *lua_state, void (*fn)(const char *txt))
+{
+ const char *str;
+ ssize_t (*save_filter_write)(struct cgit_filter *base, const void *buf, size_t count);
+ struct cgit_filter *save_filter;
+
+ str = lua_tostring(lua_state, 1);
+ if (!str)
+ return 0;
+
+ save_filter_write = filter_write;
+ save_filter = current_write_filter;
+ unhook_write();
+ fn(str);
+ hook_write(save_filter, save_filter_write);
+
+ return 0;
+}
+
+static int html_lua_filter(lua_State *lua_state)
+{
+ return hook_lua_filter(lua_state, html);
+}
+
+static int html_txt_lua_filter(lua_State *lua_state)
+{
+ return hook_lua_filter(lua_state, html_txt);
+}
+
+static int html_attr_lua_filter(lua_State *lua_state)
+{
+ return hook_lua_filter(lua_state, html_attr);
+}
+
+static int html_url_path_lua_filter(lua_State *lua_state)
+{
+ return hook_lua_filter(lua_state, html_url_path);
+}
+
+static int html_url_arg_lua_filter(lua_State *lua_state)
+{
+ return hook_lua_filter(lua_state, html_url_arg);
+}
+
+static int html_include_lua_filter(lua_State *lua_state)
+{
+ return hook_lua_filter(lua_state, (void (*)(const char *))html_include);
+}
+
+static void cleanup_lua_filter(struct cgit_filter *base)
+{
+ struct lua_filter *filter = (struct lua_filter *)base;
+
+ if (!filter->lua_state)
+ return;
+
+ lua_close(filter->lua_state);
+ filter->lua_state = NULL;
+ if (filter->script_file) {
+ free(filter->script_file);
+ filter->script_file = NULL;
+ }
+}
+
+static int init_lua_filter(struct lua_filter *filter)
+{
+ if (filter->lua_state)
+ return 0;
+
+ if (!(filter->lua_state = luaL_newstate()))
+ return 1;
+
+ luaL_openlibs(filter->lua_state);
+
+ lua_pushcfunction(filter->lua_state, html_lua_filter);
+ lua_setglobal(filter->lua_state, "html");
+ lua_pushcfunction(filter->lua_state, html_txt_lua_filter);
+ lua_setglobal(filter->lua_state, "html_txt");
+ lua_pushcfunction(filter->lua_state, html_attr_lua_filter);
+ lua_setglobal(filter->lua_state, "html_attr");
+ lua_pushcfunction(filter->lua_state, html_url_path_lua_filter);
+ lua_setglobal(filter->lua_state, "html_url_path");
+ lua_pushcfunction(filter->lua_state, html_url_arg_lua_filter);
+ lua_setglobal(filter->lua_state, "html_url_arg");
+ lua_pushcfunction(filter->lua_state, html_include_lua_filter);
+ lua_setglobal(filter->lua_state, "html_include");
+
+ if (luaL_dofile(filter->lua_state, filter->script_file)) {
+ error_lua_filter(filter);
+ lua_close(filter->lua_state);
+ filter->lua_state = NULL;
+ return 1;
+ }
+ return 0;
+}
+
+static int open_lua_filter(struct cgit_filter *base, va_list ap)
+{
+ struct lua_filter *filter = (struct lua_filter *)base;
+ int i;
+
+ if (init_lua_filter(filter))
+ return 1;
+
+ hook_write(base, write_lua_filter);
+
+ lua_getglobal(filter->lua_state, "filter_open");
+ for (i = 0; i < filter->base.argument_count; ++i)
+ lua_pushstring(filter->lua_state, va_arg(ap, char *));
+ if (lua_pcall(filter->lua_state, filter->base.argument_count, 0, 0)) {
+ error_lua_filter(filter);
+ return 1;
+ }
+ return 0;
+}
+
+static int close_lua_filter(struct cgit_filter *base)
+{
+ struct lua_filter *filter = (struct lua_filter *)base;
+ int ret = 0;
+
+ lua_getglobal(filter->lua_state, "filter_close");
+ if (lua_pcall(filter->lua_state, 0, 1, 0)) {
+ error_lua_filter(filter);
+ ret = -1;
+ } else {
+ ret = lua_tonumber(filter->lua_state, -1);
+ lua_pop(filter->lua_state, 1);
+ }
+
+ unhook_write();
+ return ret;
+}
+
+static void fprintf_lua_filter(struct cgit_filter *base, FILE *f, const char *prefix)
+{
+ struct lua_filter *filter = (struct lua_filter *)base;
+ fprintf(f, "%slua:%s\n", prefix, filter->script_file);
+}
+
+
+static struct cgit_filter *new_lua_filter(const char *cmd, int argument_count)
+{
+ struct lua_filter *filter;
+
+ filter = xmalloc(sizeof(*filter));
+ memset(filter, 0, sizeof(*filter));
+ filter->base.open = open_lua_filter;
+ filter->base.close = close_lua_filter;
+ filter->base.fprintf = fprintf_lua_filter;
+ filter->base.cleanup = cleanup_lua_filter;
+ filter->base.argument_count = argument_count;
+ filter->script_file = xstrdup(cmd);
+
+ return &filter->base;
+}
+
+#endif
+
+
int cgit_open_filter(struct cgit_filter *filter, ...)
{
int result;
va_list ap;
+ if (!filter)
+ return 0;
va_start(ap, filter);
result = filter->open(filter, ap);
va_end(ap);
int cgit_close_filter(struct cgit_filter *filter)
{
+ if (!filter)
+ return 0;
return filter->close(filter);
}
struct cgit_filter *(*ctor)(const char *cmd, int argument_count);
} filter_specs[] = {
{ "exec", new_exec_filter },
+#ifndef NO_LUA
+ { "lua", new_lua_filter },
+#endif
};
struct cgit_filter *cgit_new_filter(const char *cmd, filter_type filtertype)
colon = NULL;
switch (filtertype) {
+ case AUTH:
+ argument_count = 12;
+ break;
+
+ case EMAIL:
+ argument_count = 2;
+ break;
+
+ case OWNER:
+ argument_count = 0;
+ break;
+
case SOURCE:
case ABOUT:
argument_count = 1;
git.ckatri.com / cgit.git / blobdiff