On 4/24/2017 12:31 AM, Junio C Hamano wrote:
Ben Peart <peartben@xxxxxxxxx> writes:
Subject: [PATCH v6 3/8] convert: Split start_multi_file_filter into two separate functions
Two minor nits, because the capital after "<area>:" looks ugly in shortlog
output, and having () there makes it easier to notice that a
function name is being discussed. I.e.
convert: split start_multi_file_filter() into two separate functions
I'll make it so in the next version of the patch series.
To enable future reuse of the filter.<driver>.process infrastructure,
split start_multi_file_filter into two separate parts.
start_multi_file_filter will now only contain the generic logic to
manage the creation and tracking of the child process in a hashmap.
start_multi_file_filter_fn is a protocol specific initialization
function that will negotiate the multi-file-filter interface version
and capabilities.
The above fails to describe a lot more important/significant change
this patch makes. Two mistaken check "errno == EPIPE" have been
removed as a preliminary bugfix. I think the bugfix deserves to be
split into a separate patch by itself and hoisted much earlier in
the series. It alone is a very good change, with or without the
remainder of the changes in this patch.
OK, I'll pull that bugfix out into a separate patch.
Thanks.
Signed-off-by: Ben Peart <benpeart@xxxxxxxxxxxxx>
---
convert.c | 62 ++++++++++++++++++++++++++++++++++++--------------------------
1 file changed, 36 insertions(+), 26 deletions(-)
diff --git a/convert.c b/convert.c
index 793c29ebfd..36401fe087 100644
--- a/convert.c
+++ b/convert.c
@@ -565,35 +565,14 @@ static void stop_multi_file_filter(struct child_process *process)
finish_command(process);
}
-static struct cmd2process *start_multi_file_filter(struct hashmap *hashmap, const char *cmd)
+static int start_multi_file_filter_fn(struct cmd2process *entry)
{
int err;
- struct cmd2process *entry;
- struct child_process *process;
- const char *argv[] = { cmd, NULL };
struct string_list cap_list = STRING_LIST_INIT_NODUP;
char *cap_buf;
const char *cap_name;
-
- entry = xmalloc(sizeof(*entry));
- entry->cmd = cmd;
- entry->supported_capabilities = 0;
- process = &entry->process;
-
- child_process_init(process);
- process->argv = argv;
- process->use_shell = 1;
- process->in = -1;
- process->out = -1;
- process->clean_on_exit = 1;
- process->clean_on_exit_handler = stop_multi_file_filter;
-
- if (start_command(process)) {
- error("cannot fork to run external filter '%s'", cmd);
- return NULL;
- }
-
- hashmap_entry_init(entry, strhash(cmd));
+ struct child_process *process = &entry->process;
+ const char *cmd = entry->cmd;
sigchain_push(SIGPIPE, SIG_IGN);
@@ -642,7 +621,38 @@ static struct cmd2process *start_multi_file_filter(struct hashmap *hashmap, cons
done:
sigchain_pop(SIGPIPE);
- if (err || errno == EPIPE) {
+ return err;
+}
+
+static struct cmd2process *start_multi_file_filter(struct hashmap *hashmap, const char *cmd)
+{
+ int err;
+ struct cmd2process *entry;
+ struct child_process *process;
+ const char *argv[] = { cmd, NULL };
+
+ entry = xmalloc(sizeof(*entry));
+ entry->cmd = cmd;
+ entry->supported_capabilities = 0;
+ process = &entry->process;
+
+ child_process_init(process);
+ process->argv = argv;
+ process->use_shell = 1;
+ process->in = -1;
+ process->out = -1;
+ process->clean_on_exit = 1;
+ process->clean_on_exit_handler = stop_multi_file_filter;
+
+ if (start_command(process)) {
+ error("cannot fork to run external filter '%s'", cmd);
+ return NULL;
+ }
+
+ hashmap_entry_init(entry, strhash(cmd));
+
+ err = start_multi_file_filter_fn(entry);
+ if (err) {
error("initialization for external filter '%s' failed", cmd);
kill_multi_file_filter(hashmap, entry);
return NULL;
@@ -733,7 +743,7 @@ static int apply_multi_file_filter(const char *path, const char *src, size_t len
done:
sigchain_pop(SIGPIPE);
- if (err || errno == EPIPE) {
+ if (err) {
if (!strcmp(filter_status.buf, "error")) {
/* The filter signaled a problem with the file. */
} else if (!strcmp(filter_status.buf, "abort")) {