From: Ben Peart <peartben@gmail.com>
To: git@vger.kernel.org
Cc: gitster@pobox.com, benpeart@microsoft.com,
christian.couder@gmail.com, larsxschneider@gmail.com
Subject: [PATCH v5 8/8] convert: Update subprocess_read_status to not die on EOF
Date: Fri, 7 Apr 2017 08:03:54 -0400 [thread overview]
Message-ID: <20170407120354.17736-9-benpeart@microsoft.com> (raw)
In-Reply-To: <20170407120354.17736-1-benpeart@microsoft.com>
Enable sub-processes to gracefully handle when the process dies by
updating subprocess_read_status to return an error on EOF instead of
dying.
Update apply_multi_file_filter to take advantage of the revised
subprocess_read_status.
Signed-off-by: Ben Peart <benpeart@microsoft.com>
---
convert.c | 10 ++++++++--
sub-process.c | 10 +++++++---
sub-process.h | 2 +-
3 files changed, 16 insertions(+), 6 deletions(-)
diff --git a/convert.c b/convert.c
index baa41da760..9e181e27ad 100644
--- a/convert.c
+++ b/convert.c
@@ -629,7 +629,10 @@ static int apply_multi_file_filter(const char *path, const char *src, size_t len
if (err)
goto done;
- subprocess_read_status(process->out, &filter_status);
+ err = subprocess_read_status(process->out, &filter_status);
+ if (err)
+ goto done;
+
err = strcmp(filter_status.buf, "success");
if (err)
goto done;
@@ -638,7 +641,10 @@ static int apply_multi_file_filter(const char *path, const char *src, size_t len
if (err)
goto done;
- subprocess_read_status(process->out, &filter_status);
+ err = subprocess_read_status(process->out, &filter_status);
+ if (err)
+ goto done;
+
err = strcmp(filter_status.buf, "success");
done:
diff --git a/sub-process.c b/sub-process.c
index 60bb650012..c5057cafcd 100644
--- a/sub-process.c
+++ b/sub-process.c
@@ -30,13 +30,15 @@ struct subprocess_entry *subprocess_find_entry(const char *cmd)
return hashmap_get(&subprocess_map, &key, NULL);
}
-void subprocess_read_status(int fd, struct strbuf *status)
+int subprocess_read_status(int fd, struct strbuf *status)
{
struct strbuf **pair;
char *line;
+ int len;
+
for (;;) {
- line = packet_read_line(fd, NULL);
- if (!line)
+ len = packet_read_line_gently(fd, NULL, &line);
+ if ((len == -1) || !line)
break;
pair = strbuf_split_str(line, '=', 2);
if (pair[0] && pair[0]->len && pair[1]) {
@@ -48,6 +50,8 @@ void subprocess_read_status(int fd, struct strbuf *status)
}
strbuf_list_free(pair);
}
+
+ return len == -1 ? len : 0;
}
void subprocess_stop(struct subprocess_entry *entry)
diff --git a/sub-process.h b/sub-process.h
index 0cf1760a0a..5a1eeeece0 100644
--- a/sub-process.h
+++ b/sub-process.h
@@ -41,6 +41,6 @@ static inline struct child_process *subprocess_get_child_process(
* key/value pairs and return the value from the last "status" packet
*/
-void subprocess_read_status(int fd, struct strbuf *status);
+int subprocess_read_status(int fd, struct strbuf *status);
#endif
--
2.12.0.windows.1.31.g1548525701.dirty
next prev parent reply other threads:[~2017-04-07 12:04 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-07 12:03 [PATCH v5 0/8] refactor the filter process code into a reusable module Ben Peart
2017-04-07 12:03 ` [PATCH v5 1/8] pkt-line: add packet_read_line_gently() Ben Peart
2017-04-09 19:34 ` Lars Schneider
2017-04-07 12:03 ` [PATCH v5 2/8] convert: move packet_write_list() into pkt-line as packet_writel() Ben Peart
2017-04-09 19:43 ` Lars Schneider
2017-04-07 12:03 ` [PATCH v5 3/8] convert: Split start_multi_file_filter into two separate functions Ben Peart
2017-04-09 19:56 ` Lars Schneider
2017-04-11 16:16 ` Jeff King
2017-04-11 19:29 ` Lars Schneider
2017-04-11 19:37 ` Jeff King
2017-04-11 20:01 ` Lars Schneider
2017-04-11 20:05 ` Jeff King
2017-04-20 17:27 ` Ben Peart
2017-04-07 12:03 ` [PATCH v5 4/8] convert: Separate generic structures and variables from the filter specific ones Ben Peart
2017-04-10 10:18 ` Lars Schneider
2017-04-17 3:31 ` Junio C Hamano
2017-04-18 16:38 ` Ben Peart
2017-04-19 1:23 ` Junio C Hamano
2017-04-20 17:24 ` Ben Peart
2017-04-07 12:03 ` [PATCH v5 5/8] convert: Update generic functions to only use generic data structures Ben Peart
2017-04-10 12:05 ` Lars Schneider
2017-04-07 12:03 ` [PATCH v5 6/8] convert: rename reusable sub-process functions Ben Peart
2017-04-10 12:11 ` Lars Schneider
2017-04-07 12:03 ` [PATCH v5 7/8] sub-process: move sub-process functions into separate files Ben Peart
2017-04-10 12:41 ` Lars Schneider
2017-04-07 12:03 ` Ben Peart [this message]
2017-04-10 12:48 ` [PATCH v5 8/8] convert: Update subprocess_read_status to not die on EOF Lars Schneider
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