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| author | Jason A. Donenfeld <Jason@zx2c4.com> | |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | |
| commit | ||
| parent | ||
| tree | ||
| download | ||
filter: allow returning exit code from filter
Filters can now indicate a status back to cgit by means of the exit code
for exec, or the return value from close for Lua.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
| -rw-r--r-- | cgitrc.5.txt | 3 | |
| -rw-r--r-- | filter.c | 14 | |
| -rw-r--r-- | filters/email-gravatar.lua | 1 |
3 files changed, 12 insertions, 6 deletions
diff --git a/cgitrc.5.txt b/cgitrc.5.txt index d8f7d0e..170e825 100644 --- a/cgitrc.5.txt +++ b/cgitrc.5.txt @@ -590,7 +590,8 @@ specification with the relevant string; available values are: This is called whenever cgit writes data to the webpage. 'filter_close()':: This is called when the current filtering operation is - completed. + completed. It must return an integer value. Usually 0 + indicates success. Additionally, cgit exposes to the Lua the following built-in functions: @@ -106,7 +106,7 @@ static int open_exec_filter(struct cgit_filter *base, va_list ap) static int close_exec_filter(struct cgit_filter *base) { struct cgit_exec_filter *filter = (struct cgit_exec_filter *)base; - int i, exit_status; + int i, exit_status = 0; chk_non_negative(dup2(filter->old_stdout, STDOUT_FILENO), "Unable to restore STDOUT"); @@ -114,14 +114,14 @@ static int close_exec_filter(struct cgit_filter *base) 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; + return WEXITSTATUS(exit_status); } @@ -315,10 +315,14 @@ static int close_lua_filter(struct cgit_filter *base) int ret = 0; lua_getglobal(filter->lua_state, "filter_close"); - if (lua_pcall(filter->lua_state, 0, 0, 0)) { + if (lua_pcall(filter->lua_state, 0, 1, 0)) { error_lua_filter(filter); - ret = 1; + ret = -1; + } else { + ret = lua_tonumber(filter->lua_state, -1); + lua_pop(filter->lua_state, 1); } + unhook_write(); return ret; } diff --git a/filters/email-gravatar.lua b/filters/email-gravatar.lua index 22f0641..c80b63e 100644 --- a/filters/email-gravatar.lua +++ b/filters/email-gravatar.lua @@ -16,6 +16,7 @@ end function filter_close() html("<img src='//www.gravatar.com/avatar/" .. md5 .. "?s=13&d=retro' style='height:10pt;width:10pt' alt='Gravatar' /> " .. buffer) + return 0 end function filter_write(str) |