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[PATCH v8 14/41] builtin/apply: make apply_all_patches() return 128 or 1 on error

From
Christian Couder <christian.couder@gmail.com>
Date
Jun 27, 2016, 18:24 UTC
Message-ID
<20160627182429.31550-15-chriscool@tuxfamily.org>
In-Reply-To
<20160627182429.31550-1-chriscool@tuxfamily.org>

To finish libifying the apply functionality, apply_all_patches() should not die() or exit() in case of error, but return either 128 or 1, so that it gives the same exit code as when die() or exit(1) is called. This way scripts relying on the exit code don't need to be changed.

While doing that we must take care that file descriptors are properly closed and, if needed, reset to a sensible value.

Also, according to the lockfile API, when finished with a lockfile, one should either commit it or roll it back.

This is even more important now that the same lockfile can be passed to init_apply_state() many times to be reused by series of calls to the apply lib functions.

Helped-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Helped-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
---
 builtin/apply.c | 37 ++++++++++++++++++++++++++-----------
 1 file changed, 26 insertions(+), 11 deletions(-)
diff --git a/builtin/apply.c b/builtin/apply.c
index 18c5419..29ca524 100644
--- a/builtin/apply.c
+++ b/builtin/apply.c
@@ -4578,15 +4578,18 @@ static int apply_all_patches(struct apply_state *state,
 					      arg);
 
 		fd = open(arg, O_RDONLY);
-		if (fd < 0)
-			die_errno(_("can't open patch '%s'"), arg);
+		if (fd < 0) {
+			error(_("can't open patch '%s': %s"), arg, strerror(errno));
+			res = -128;
+			goto end;
+		}
 		read_stdin = 0;
 		set_default_whitespace_mode(state);
 		res = apply_patch(state, fd, arg, options);
+		close(fd);
 		if (res < 0)
 			goto end;
 		errs |= res;
-		close(fd);
 	}
 	set_default_whitespace_mode(state);
 	if (read_stdin) {
@@ -4606,11 +4609,14 @@ static int apply_all_patches(struct apply_state *state,
 				   squelched),
 				squelched);
 		}
-		if (state->ws_error_action == die_on_ws_error)
-			die(Q_("%d line adds whitespace errors.",
-			       "%d lines add whitespace errors.",
-			       state->whitespace_error),
-			    state->whitespace_error);
+		if (state->ws_error_action == die_on_ws_error) {
+			error(Q_("%d line adds whitespace errors.",
+				 "%d lines add whitespace errors.",
+				 state->whitespace_error),
+			      state->whitespace_error);
+			res = -128;
+			goto end;
+		}
 		if (state->applied_after_fixing_ws && state->apply)
 			warning("%d line%s applied after"
 				" fixing whitespace errors.",
@@ -4624,15 +4630,24 @@ static int apply_all_patches(struct apply_state *state,
 	}
 
 	if (state->update_index) {
-		if (write_locked_index(&the_index, state->lock_file, COMMIT_LOCK))
-			die(_("Unable to write new index file"));
+		res = write_locked_index(&the_index, state->lock_file, COMMIT_LOCK);
+		if (res) {
+			error(_("Unable to write new index file"));
+			res = -128;
+			goto end;
+		}
 		state->newfd = -1;
 	}
 
 	return !!errs;
 
 end:
-	exit(res == -1 ? 1 : 128);
+	if (state->newfd >= 0) {
+		rollback_lock_file(state->lock_file);
+		state->newfd = -1;
+	}
+
+	return (res == -1 ? 1 : 128);
 }
 
 int cmd_apply(int argc, const char **argv, const char *prefix)

-- 
2.9.0.172.gfb57a78
Previous: Christian CouderNext: Christian Couder
Message 8 of 59 in “libify apply and use lib in am, part 2”
  1. 00/41 libify apply and use lib in am, part 2Christian Couder, Jun 27, 2016
  2. 03/41 builtin/apply: make apply_patch() return -1 or -128 instead of die()ingChristian Couder, Jun 27, 2016
  3. 06/41 builtin/apply: make parse_chunk() return a negative integer on errorChristian Couder, Jun 27, 2016
  4. 07/41 builtin/apply: make parse_single_patch() return -1 on errorChristian Couder, Jun 27, 2016
  5. 01/41 apply: make some names more specificChristian Couder, Jun 27, 2016
  6. 12/41 builtin/apply: make check_apply_state() return -1 instead of die()ingChristian Couder, Jun 27, 2016
  7. 19/41 builtin/apply: make build_fake_ancestor() return -1 on errorChristian Couder, Jun 27, 2016
  8. 14/41 builtin/apply: make apply_all_patches() return 128 or 1 on errorChristian Couder, Jun 27, 2016
  9. 16/41 builtin/apply: make gitdiff_*() return 1 at end of headerChristian Couder, Jun 27, 2016
  10. 28/41 builtin/apply: rename option parsing functionsChristian Couder, Jun 27, 2016
  11. 29/41 apply: rename and move opt constants to apply.hChristian Couder, Jun 27, 2016
  12. 23/41 builtin/apply: make create_file() return -1 on errorChristian Couder, Jun 27, 2016
  13. 24/41 builtin/apply: make write_out_one_result() return -1 on errorChristian Couder, Jun 27, 2016
  14. 21/41 builtin/apply: make add_conflicted_stages_file() return -1 on errorChristian Couder, Jun 27, 2016
  15. 20/41 builtin/apply: make remove_file() return -1 on errorChristian Couder, Jun 27, 2016
  16. 26/41 builtin/apply: make try_create_file() return -1 on errorChristian Couder, Jun 27, 2016
  17. 32/41 environment: add set_index_file()Christian Couder, Jun 27, 2016
  18. Junio C HamanoJul 26, 2016
  19. Duy NguyenJul 27, 2016
  20. Christian CouderJul 29, 2016
  21. Duy NguyenJul 29, 2016
  22. Christian CouderJul 29, 2016
  23. Duy NguyenJul 29, 2016
  24. Junio C HamanoJul 29, 2016
  25. 31/41 apply: make some parsing functions static againChristian Couder, Jun 27, 2016
  26. 38/41 usage: add get_error_routine() and get_warn_routine()Christian Couder, Jun 27, 2016
  27. 35/41 apply: make 'be_silent' incompatible with 'apply_verbosely'Christian Couder, Jun 27, 2016
  28. Junio C HamanoJul 26, 2016
  29. 39/41 apply: change error_routine when be_silent is setChristian Couder, Jun 27, 2016
  30. 33/41 write_or_die: use warning() instead of fprintf(stderr, ...)Christian Couder, Jun 27, 2016
  31. Junio C HamanoJun 28, 2016
  32. Christian CouderJun 30, 2016
  33. 40/41 builtin/am: use apply api in run_apply()Christian Couder, Jun 27, 2016
  34. Junio C HamanoJul 26, 2016
  35. 34/41 apply: add 'be_silent' variable to 'struct apply_state'Christian Couder, Jun 27, 2016
  36. Junio C HamanoJul 26, 2016
  37. 41/41 apply: use error_errno() where possibleChristian Couder, Jun 27, 2016
  38. 37/41 usage: add set_warn_routine()Christian Couder, Jun 27, 2016
  39. 36/41 apply: don't print on stdout when be_silent is setChristian Couder, Jun 27, 2016
  40. Junio C HamanoJul 26, 2016
  41. 22/41 builtin/apply: make add_index_file() return -1 on errorChristian Couder, Jun 27, 2016
  42. 13/41 builtin/apply: move check_apply_state() to apply.cChristian Couder, Jun 27, 2016
  43. 27/41 builtin/apply: make create_one_file() return -1 on errorChristian Couder, Jun 27, 2016
  44. 25/41 builtin/apply: make write_out_results() return -1 on errorChristian Couder, Jun 27, 2016
  45. 15/41 builtin/apply: make parse_traditional_patch() return -1 on errorChristian Couder, Jun 27, 2016
  46. 11/41 apply: make init_apply_state() return -1 instead of exit()ingChristian Couder, Jun 27, 2016
  47. 02/41 apply: move 'struct apply_state' to apply.hChristian Couder, Jun 27, 2016
  48. 04/41 builtin/apply: read_patch_file() return -1 instead of die()ingChristian Couder, Jun 27, 2016
  49. 08/41 builtin/apply: make parse_whitespace_option() return -1 instead of die()ingChristian Couder, Jun 27, 2016
  50. 09/41 builtin/apply: make parse_ignorewhitespace_option() return -1 instead of die()ingChristian Couder, Jun 27, 2016
  51. 05/41 builtin/apply: make find_header() return -128 instead of die()ingChristian Couder, Jun 27, 2016
  52. 18/41 builtin/apply: change die_on_unsafe_path() to check_unsafe_path()Christian Couder, Jun 27, 2016
  53. 17/41 builtin/apply: make gitdiff_*() return -1 on errorChristian Couder, Jun 27, 2016
  54. 10/41 builtin/apply: move init_apply_state() to apply.cChristian Couder, Jun 27, 2016
  55. Christian CouderJun 27, 2016
  56. Junio C HamanoJul 26, 2016
  57. Christian CouderJul 27, 2016
  58. Junio C HamanoJul 27, 2016
  59. Christian CouderJul 30, 2016

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