[PATCH 1/1] RFC: git: update to v2.21.0-rc0

[PATCH 1/1] RFC: git: update to v2.21.0-rc0

[list]

From: Christian Hesse <mail at eworm.de>

Update to git version v2.21.0-rc0. Required changes follow upstream commits:

* 6a7895fd8a3bd409f2b71ffc355d5142172cc2a0
  (commit: prepare free_commit_buffer and release_commit_memory for
  any repo)

* e092073d643b17c82d72cf692fbfaea9c9796f11
  (tree.c: make read_tree*() take 'struct repository *')

* ace5707a803eda0f1dde3d776dc3729d3bc7759a
  (banned.h: mark strncat() as banned)

Signed-off-by: Christian Hesse <mail at eworm.de>
---
 Makefile    |  4 ++--
 git         |  2 +-
 ui-atom.c   |  2 +-
 ui-blame.c  |  4 ++--
 ui-blob.c   |  9 ++++++---
 ui-log.c    |  4 ++--
 ui-plain.c  |  3 ++-
 ui-ssdiff.c |  4 ++--
 ui-stats.c  |  2 +-
 ui-tree.c   | 10 ++++++----
 10 files changed, 25 insertions(+), 19 deletions(-)

diff --git a/Makefile b/Makefile
index e690c7f..080426c 100644
--- a/Makefile
+++ b/Makefile
@@ -14,8 +14,8 @@ htmldir = $(docdir)
 pdfdir = $(docdir)
 mandir = $(prefix)/share/man
 SHA1_HEADER = <openssl/sha.h>
-GIT_VER = 2.20.0
-GIT_URL = https://www.kernel.org/pub/software/scm/git/git-$(GIT_VER).tar.xz
+GIT_VER = 2.21.0.rc0
+GIT_URL = https://www.kernel.org/pub/software/scm/git/testing/git-$(GIT_VER).tar.xz
 INSTALL = install
 COPYTREE = cp -r
 MAN5_TXT = $(wildcard *.5.txt)
diff --git a/git b/git
index 5d826e9..d62dad7 160000
--- a/git
+++ b/git
@@ -1 +1 @@
-Subproject commit 5d826e972970a784bd7a7bdf587512510097b8c7
+Subproject commit d62dad7a7dca3f6a65162bf0e52cdf6927958e78
diff --git a/ui-atom.c b/ui-atom.c
index 3866823..c182fad 100644
--- a/ui-atom.c
+++ b/ui-atom.c
@@ -140,7 +140,7 @@ void cgit_print_atom(char *tip, char *path, int max_count)
 	}
 	while ((commit = get_revision(&rev)) != NULL) {
 		add_entry(commit, host);
-		free_commit_buffer(commit);
+		free_commit_buffer(the_repository->parsed_objects, commit);
 		free_commit_list(commit->parents);
 		commit->parents = NULL;
 	}
diff --git a/ui-blame.c b/ui-blame.c
index c52cb9b..644c30a 100644
--- a/ui-blame.c
+++ b/ui-blame.c
@@ -290,8 +290,8 @@ void cgit_print_blame(void)
 	walk_tree_ctx.match_baselen = (path_items.match) ?
 				       basedir_len(path_items.match) : -1;
 
-	read_tree_recursive(commit->maybe_tree, "", 0, 0, &paths, walk_tree,
-		&walk_tree_ctx);
+	read_tree_recursive(the_repository, commit->maybe_tree, "", 0, 0,
+		&paths, walk_tree, &walk_tree_ctx);
 	if (!walk_tree_ctx.state)
 		cgit_print_error_page(404, "Not found", "Not found");
 	else if (walk_tree_ctx.state == 2)
diff --git a/ui-blob.c b/ui-blob.c
index 4b6b462..30e2d4b 100644
--- a/ui-blob.c
+++ b/ui-blob.c
@@ -56,7 +56,8 @@ int cgit_ref_path_exists(const char *path, const char *ref, int file_only)
 		goto done;
 	if (oid_object_info(the_repository, &oid, &size) != OBJ_COMMIT)
 		goto done;
-	read_tree_recursive(lookup_commit_reference(the_repository, &oid)->maybe_tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
+	read_tree_recursive(the_repository, lookup_commit_reference(the_repository, &oid)->maybe_tree,
+		"", 0, 0, &paths, walk_tree, &walk_tree_ctx);
 
 done:
 	free(path_items.match);
@@ -90,7 +91,8 @@ int cgit_print_file(char *path, const char *head, int file_only)
 	type = oid_object_info(the_repository, &oid, &size);
 	if (type == OBJ_COMMIT) {
 		commit = lookup_commit_reference(the_repository, &oid);
-		read_tree_recursive(commit->maybe_tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
+		read_tree_recursive(the_repository, commit->maybe_tree,
+			"", 0, 0, &paths, walk_tree, &walk_tree_ctx);
 		if (!walk_tree_ctx.found_path)
 			return -1;
 		type = oid_object_info(the_repository, &oid, &size);
@@ -146,7 +148,8 @@ void cgit_print_blob(const char *hex, char *path, const char *head, int file_onl
 
 	if ((!hex) && type == OBJ_COMMIT && path) {
 		commit = lookup_commit_reference(the_repository, &oid);
-		read_tree_recursive(commit->maybe_tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
+		read_tree_recursive(the_repository, commit->maybe_tree,
+			"", 0, 0, &paths, walk_tree, &walk_tree_ctx);
 		type = oid_object_info(the_repository, &oid, &size);
 	}
 
diff --git a/ui-log.c b/ui-log.c
index 3bcb657..e91968b 100644
--- a/ui-log.c
+++ b/ui-log.c
@@ -488,7 +488,7 @@ void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *pattern
 	for (i = 0; i < ofs && (commit = get_revision(&rev)) != NULL; /* nop */) {
 		if (show_commit(commit, &rev))
 			i++;
-		free_commit_buffer(commit);
+		free_commit_buffer(the_repository->parsed_objects, commit);
 		free_commit_list(commit->parents);
 		commit->parents = NULL;
 	}
@@ -510,7 +510,7 @@ void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *pattern
 			i++;
 			print_commit(commit, &rev);
 		}
-		free_commit_buffer(commit);
+		free_commit_buffer(the_repository->parsed_objects, commit);
 		free_commit_list(commit->parents);
 		commit->parents = NULL;
 	}
diff --git a/ui-plain.c b/ui-plain.c
index 070c34b..b73c1cf 100644
--- a/ui-plain.c
+++ b/ui-plain.c
@@ -198,7 +198,8 @@ void cgit_print_plain(void)
 	}
 	else
 		walk_tree_ctx.match_baselen = basedir_len(path_items.match);
-	read_tree_recursive(commit->maybe_tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
+	read_tree_recursive(the_repository, commit->maybe_tree,
+		"", 0, 0, &paths, walk_tree, &walk_tree_ctx);
 	if (!walk_tree_ctx.match)
 		cgit_print_error_page(404, "Not found", "Not found");
 	else if (walk_tree_ctx.match == 2)
diff --git a/ui-ssdiff.c b/ui-ssdiff.c
index c456033..1f12cfc 100644
--- a/ui-ssdiff.c
+++ b/ui-ssdiff.c
@@ -136,10 +136,10 @@ static char *replace_tabs(char *line)
 	for (;;) {
 		cur_buf = strchr(prev_buf, '\t');
 		if (!cur_buf) {
-			strncat(result, prev_buf, result_len);
+			snprintf(result, result_len, "%s", prev_buf);
 			break;
 		} else {
-			strncat(result, prev_buf, cur_buf - prev_buf);
+			snprintf(result, cur_buf - prev_buf, "%s", prev_buf);
 			linelen = strlen(result);
 			memset(&result[linelen], ' ', 8 - (linelen % 8));
 			result[linelen + 8 - (linelen % 8)] = '\0';
diff --git a/ui-stats.c b/ui-stats.c
index 7acd358..7272a61 100644
--- a/ui-stats.c
+++ b/ui-stats.c
@@ -241,7 +241,7 @@ static struct string_list collect_stats(const struct cgit_period *period)
 	memset(&authors, 0, sizeof(authors));
 	while ((commit = get_revision(&rev)) != NULL) {
 		add_commit(&authors, commit, period);
-		free_commit_buffer(commit);
+		free_commit_buffer(the_repository->parsed_objects, commit);
 		free_commit_list(commit->parents);
 		commit->parents = NULL;
 	}
diff --git a/ui-tree.c b/ui-tree.c
index df8ad82..008fccc 100644
--- a/ui-tree.c
+++ b/ui-tree.c
@@ -185,8 +185,8 @@ static void write_tree_link(const struct object_id *oid, char *name,
 		tree_ctx.name = NULL;
 		tree_ctx.count = 0;
 
-		read_tree_recursive(tree, "", 0, 1, &paths, single_tree_cb,
-				    &tree_ctx);
+		read_tree_recursive(the_repository, tree, "", 0, 1,
+			&paths, single_tree_cb, &tree_ctx);
 
 		if (tree_ctx.count != 1)
 			break;
@@ -294,7 +294,8 @@ static void ls_tree(const struct object_id *oid, char *path, struct walk_tree_co
 	}
 
 	ls_head();
-	read_tree_recursive(tree, "", 0, 1, &paths, ls_item, walk_tree_ctx);
+	read_tree_recursive(the_repository, tree, "", 0, 1,
+		&paths, ls_item, walk_tree_ctx);
 	ls_tail();
 }
 
@@ -373,7 +374,8 @@ void cgit_print_tree(const char *rev, char *path)
 		goto cleanup;
 	}
 
-	read_tree_recursive(commit->maybe_tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
+	read_tree_recursive(the_repository, commit->maybe_tree, "", 0, 0,
+		&paths, walk_tree, &walk_tree_ctx);
 	if (walk_tree_ctx.state == 1)
 		ls_tail();
 	else if (walk_tree_ctx.state == 2)

[PATCH 1/1] RFC: git: update to v2.21.0-rc0

[john]

On Thu, Feb 07, 2019 at 11:21:01AM +0100, Christian Hesse wrote:
> From: Christian Hesse <mail at eworm.de>
> 
> Update to git version v2.21.0-rc0. Required changes follow upstream commits:
> 
> * 6a7895fd8a3bd409f2b71ffc355d5142172cc2a0
>   (commit: prepare free_commit_buffer and release_commit_memory for
>   any repo)
> 
> * e092073d643b17c82d72cf692fbfaea9c9796f11
>   (tree.c: make read_tree*() take 'struct repository *')
> 
> * ace5707a803eda0f1dde3d776dc3729d3bc7759a
>   (banned.h: mark strncat() as banned)

Can we pull out the strncat changes and merge them in advance of the
version bump?  I don't think there's any dependency on Git changes for
these.

> Signed-off-by: Christian Hesse <mail at eworm.de>

Even without the strncat changes pulled out, this looks sensible, so:

Reviewed-by: John Keeping <john at keeping.me.uk>

> ---
>  Makefile    |  4 ++--
>  git         |  2 +-
>  ui-atom.c   |  2 +-
>  ui-blame.c  |  4 ++--
>  ui-blob.c   |  9 ++++++---
>  ui-log.c    |  4 ++--
>  ui-plain.c  |  3 ++-
>  ui-ssdiff.c |  4 ++--
>  ui-stats.c  |  2 +-
>  ui-tree.c   | 10 ++++++----
>  10 files changed, 25 insertions(+), 19 deletions(-)
> 
> diff --git a/Makefile b/Makefile
> index e690c7f..080426c 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -14,8 +14,8 @@ htmldir = $(docdir)
>  pdfdir = $(docdir)
>  mandir = $(prefix)/share/man
>  SHA1_HEADER = <openssl/sha.h>
> -GIT_VER = 2.20.0
> -GIT_URL = https://www.kernel.org/pub/software/scm/git/git-$(GIT_VER).tar.xz
> +GIT_VER = 2.21.0.rc0
> +GIT_URL = https://www.kernel.org/pub/software/scm/git/testing/git-$(GIT_VER).tar.xz
>  INSTALL = install
>  COPYTREE = cp -r
>  MAN5_TXT = $(wildcard *.5.txt)
> diff --git a/git b/git
> index 5d826e9..d62dad7 160000
> --- a/git
> +++ b/git
> @@ -1 +1 @@
> -Subproject commit 5d826e972970a784bd7a7bdf587512510097b8c7
> +Subproject commit d62dad7a7dca3f6a65162bf0e52cdf6927958e78
> diff --git a/ui-atom.c b/ui-atom.c
> index 3866823..c182fad 100644
> --- a/ui-atom.c
> +++ b/ui-atom.c
> @@ -140,7 +140,7 @@ void cgit_print_atom(char *tip, char *path, int max_count)
>  	}
>  	while ((commit = get_revision(&rev)) != NULL) {
>  		add_entry(commit, host);
> -		free_commit_buffer(commit);
> +		free_commit_buffer(the_repository->parsed_objects, commit);
>  		free_commit_list(commit->parents);
>  		commit->parents = NULL;
>  	}
> diff --git a/ui-blame.c b/ui-blame.c
> index c52cb9b..644c30a 100644
> --- a/ui-blame.c
> +++ b/ui-blame.c
> @@ -290,8 +290,8 @@ void cgit_print_blame(void)
>  	walk_tree_ctx.match_baselen = (path_items.match) ?
>  				       basedir_len(path_items.match) : -1;
>  
> -	read_tree_recursive(commit->maybe_tree, "", 0, 0, &paths, walk_tree,
> -		&walk_tree_ctx);
> +	read_tree_recursive(the_repository, commit->maybe_tree, "", 0, 0,
> +		&paths, walk_tree, &walk_tree_ctx);
>  	if (!walk_tree_ctx.state)
>  		cgit_print_error_page(404, "Not found", "Not found");
>  	else if (walk_tree_ctx.state == 2)
> diff --git a/ui-blob.c b/ui-blob.c
> index 4b6b462..30e2d4b 100644
> --- a/ui-blob.c
> +++ b/ui-blob.c
> @@ -56,7 +56,8 @@ int cgit_ref_path_exists(const char *path, const char *ref, int file_only)
>  		goto done;
>  	if (oid_object_info(the_repository, &oid, &size) != OBJ_COMMIT)
>  		goto done;
> -	read_tree_recursive(lookup_commit_reference(the_repository, &oid)->maybe_tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
> +	read_tree_recursive(the_repository, lookup_commit_reference(the_repository, &oid)->maybe_tree,
> +		"", 0, 0, &paths, walk_tree, &walk_tree_ctx);
>  
>  done:
>  	free(path_items.match);
> @@ -90,7 +91,8 @@ int cgit_print_file(char *path, const char *head, int file_only)
>  	type = oid_object_info(the_repository, &oid, &size);
>  	if (type == OBJ_COMMIT) {
>  		commit = lookup_commit_reference(the_repository, &oid);
> -		read_tree_recursive(commit->maybe_tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
> +		read_tree_recursive(the_repository, commit->maybe_tree,
> +			"", 0, 0, &paths, walk_tree, &walk_tree_ctx);
>  		if (!walk_tree_ctx.found_path)
>  			return -1;
>  		type = oid_object_info(the_repository, &oid, &size);
> @@ -146,7 +148,8 @@ void cgit_print_blob(const char *hex, char *path, const char *head, int file_onl
>  
>  	if ((!hex) && type == OBJ_COMMIT && path) {
>  		commit = lookup_commit_reference(the_repository, &oid);
> -		read_tree_recursive(commit->maybe_tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
> +		read_tree_recursive(the_repository, commit->maybe_tree,
> +			"", 0, 0, &paths, walk_tree, &walk_tree_ctx);
>  		type = oid_object_info(the_repository, &oid, &size);
>  	}
>  
> diff --git a/ui-log.c b/ui-log.c
> index 3bcb657..e91968b 100644
> --- a/ui-log.c
> +++ b/ui-log.c
> @@ -488,7 +488,7 @@ void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *pattern
>  	for (i = 0; i < ofs && (commit = get_revision(&rev)) != NULL; /* nop */) {
>  		if (show_commit(commit, &rev))
>  			i++;
> -		free_commit_buffer(commit);
> +		free_commit_buffer(the_repository->parsed_objects, commit);
>  		free_commit_list(commit->parents);
>  		commit->parents = NULL;
>  	}
> @@ -510,7 +510,7 @@ void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *pattern
>  			i++;
>  			print_commit(commit, &rev);
>  		}
> -		free_commit_buffer(commit);
> +		free_commit_buffer(the_repository->parsed_objects, commit);
>  		free_commit_list(commit->parents);
>  		commit->parents = NULL;
>  	}
> diff --git a/ui-plain.c b/ui-plain.c
> index 070c34b..b73c1cf 100644
> --- a/ui-plain.c
> +++ b/ui-plain.c
> @@ -198,7 +198,8 @@ void cgit_print_plain(void)
>  	}
>  	else
>  		walk_tree_ctx.match_baselen = basedir_len(path_items.match);
> -	read_tree_recursive(commit->maybe_tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
> +	read_tree_recursive(the_repository, commit->maybe_tree,
> +		"", 0, 0, &paths, walk_tree, &walk_tree_ctx);
>  	if (!walk_tree_ctx.match)
>  		cgit_print_error_page(404, "Not found", "Not found");
>  	else if (walk_tree_ctx.match == 2)
> diff --git a/ui-ssdiff.c b/ui-ssdiff.c
> index c456033..1f12cfc 100644
> --- a/ui-ssdiff.c
> +++ b/ui-ssdiff.c
> @@ -136,10 +136,10 @@ static char *replace_tabs(char *line)
>  	for (;;) {
>  		cur_buf = strchr(prev_buf, '\t');
>  		if (!cur_buf) {
> -			strncat(result, prev_buf, result_len);
> +			snprintf(result, result_len, "%s", prev_buf);
>  			break;
>  		} else {
> -			strncat(result, prev_buf, cur_buf - prev_buf);
> +			snprintf(result, cur_buf - prev_buf, "%s", prev_buf);
>  			linelen = strlen(result);
>  			memset(&result[linelen], ' ', 8 - (linelen % 8));
>  			result[linelen + 8 - (linelen % 8)] = '\0';
> diff --git a/ui-stats.c b/ui-stats.c
> index 7acd358..7272a61 100644
> --- a/ui-stats.c
> +++ b/ui-stats.c
> @@ -241,7 +241,7 @@ static struct string_list collect_stats(const struct cgit_period *period)
>  	memset(&authors, 0, sizeof(authors));
>  	while ((commit = get_revision(&rev)) != NULL) {
>  		add_commit(&authors, commit, period);
> -		free_commit_buffer(commit);
> +		free_commit_buffer(the_repository->parsed_objects, commit);
>  		free_commit_list(commit->parents);
>  		commit->parents = NULL;
>  	}
> diff --git a/ui-tree.c b/ui-tree.c
> index df8ad82..008fccc 100644
> --- a/ui-tree.c
> +++ b/ui-tree.c
> @@ -185,8 +185,8 @@ static void write_tree_link(const struct object_id *oid, char *name,
>  		tree_ctx.name = NULL;
>  		tree_ctx.count = 0;
>  
> -		read_tree_recursive(tree, "", 0, 1, &paths, single_tree_cb,
> -				    &tree_ctx);
> +		read_tree_recursive(the_repository, tree, "", 0, 1,
> +			&paths, single_tree_cb, &tree_ctx);
>  
>  		if (tree_ctx.count != 1)
>  			break;
> @@ -294,7 +294,8 @@ static void ls_tree(const struct object_id *oid, char *path, struct walk_tree_co
>  	}
>  
>  	ls_head();
> -	read_tree_recursive(tree, "", 0, 1, &paths, ls_item, walk_tree_ctx);
> +	read_tree_recursive(the_repository, tree, "", 0, 1,
> +		&paths, ls_item, walk_tree_ctx);
>  	ls_tail();
>  }
>  
> @@ -373,7 +374,8 @@ void cgit_print_tree(const char *rev, char *path)
>  		goto cleanup;
>  	}
>  
> -	read_tree_recursive(commit->maybe_tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
> +	read_tree_recursive(the_repository, commit->maybe_tree, "", 0, 0,
> +		&paths, walk_tree, &walk_tree_ctx);
>  	if (walk_tree_ctx.state == 1)
>  		ls_tail();
>  	else if (walk_tree_ctx.state == 2)
> _______________________________________________
> CGit mailing list
> CGit at lists.zx2c4.com
> https://lists.zx2c4.com/mailman/listinfo/cgit

[PATCH 1/2] ui-ssdiff: ban strncat()

[list]

From: Christian Hesse <mail at eworm.de>

Git version v2.21.0 marks strncat() as banned (commit
ace5707a803eda0f1dde3d776dc3729d3bc7759a), so replace it.

Signed-off-by: Christian Hesse <mail at eworm.de>
Reviewed-by: John Keeping <john at keeping.me.uk>
---
 ui-ssdiff.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ui-ssdiff.c b/ui-ssdiff.c
index c456033..1f12cfc 100644
--- a/ui-ssdiff.c
+++ b/ui-ssdiff.c
@@ -136,10 +136,10 @@ static char *replace_tabs(char *line)
 	for (;;) {
 		cur_buf = strchr(prev_buf, '\t');
 		if (!cur_buf) {
-			strncat(result, prev_buf, result_len);
+			snprintf(result, result_len, "%s", prev_buf);
 			break;
 		} else {
-			strncat(result, prev_buf, cur_buf - prev_buf);
+			snprintf(result, cur_buf - prev_buf, "%s", prev_buf);
 			linelen = strlen(result);
 			memset(&result[linelen], ' ', 8 - (linelen % 8));
 			result[linelen + 8 - (linelen % 8)] = '\0';

[PATCH 1/2] ui-ssdiff: ban strncat()

[Jason]

You sure those statements are the same? Snprintf doesn't append like
strncat. Wouldn't strlcat be the more apt replacement?

--
Sent from my telephone.

On Fri, Feb 8, 2019, 22:49 Christian Hesse <list at eworm.de wrote:

> From: Christian Hesse <mail at eworm.de>
>
> Git version v2.21.0 marks strncat() as banned (commit
> ace5707a803eda0f1dde3d776dc3729d3bc7759a), so replace it.
>
> Signed-off-by: Christian Hesse <mail at eworm.de>
> Reviewed-by: John Keeping <john at keeping.me.uk>
> ---
>  ui-ssdiff.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/ui-ssdiff.c b/ui-ssdiff.c
> index c456033..1f12cfc 100644
> --- a/ui-ssdiff.c
> +++ b/ui-ssdiff.c
> @@ -136,10 +136,10 @@ static char *replace_tabs(char *line)
>         for (;;) {
>                 cur_buf = strchr(prev_buf, '\t');
>                 if (!cur_buf) {
> -                       strncat(result, prev_buf, result_len);
> +                       snprintf(result, result_len, "%s", prev_buf);
>                         break;
>                 } else {
> -                       strncat(result, prev_buf, cur_buf - prev_buf);
> +                       snprintf(result, cur_buf - prev_buf, "%s",
> prev_buf);
>                         linelen = strlen(result);
>                         memset(&result[linelen], ' ', 8 - (linelen % 8));
>                         result[linelen + 8 - (linelen % 8)] = '\0';
> _______________________________________________
> CGit mailing list
> CGit at lists.zx2c4.com
> https://lists.zx2c4.com/mailman/listinfo/cgit
>
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[PATCH 1/2] ui-ssdiff: ban strncat()

[list]

"Jason A. Donenfeld" <Jason at zx2c4.com> on Sat, 2019/02/09 12:31:
> You sure those statements are the same? Snprintf doesn't append like
> strncat. Wouldn't strlcat be the more apt replacement?

We have an unconditional

result[0] = '\0';

that mad be think it is safe. But we are inside a loop, so probably not... :-p
Let me have another look.
-- 
main(a){char*c=/*    Schoene Gruesse                         */"B?IJj;MEH"
"CX:;",b;for(a/*    Best regards             my address:    */=0;b=c[a++];)
putchar(b-1/(/*    Chris            cc -ox -xc - && ./x    */b/42*2-3)*42);}
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[PATCH 1/2] ui-ssdiff: ban strncat()

[list]

"Jason A. Donenfeld" <Jason at zx2c4.com> on Sat, 2019/02/09 12:31:
> Wouldn't strlcat be the more apt replacement?

Looks like strlcat requires to link against libbsd. I do not think we
want that, no?
-- 
main(a){char*c=/*    Schoene Gruesse                         */"B?IJj;MEH"
"CX:;",b;for(a/*    Best regards             my address:    */=0;b=c[a++];)
putchar(b-1/(/*    Chris            cc -ox -xc - && ./x    */b/42*2-3)*42);}
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[PATCH v2 1/1] ui-ssdiff: ban strncat()

[list]

From: Christian Hesse <mail at eworm.de>

Git version v2.21.0 marks strncat() as banned (commit
ace5707a803eda0f1dde3d776dc3729d3bc7759a), so replace it.

Signed-off-by: Christian Hesse <mail at eworm.de>
---
 ui-ssdiff.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/ui-ssdiff.c b/ui-ssdiff.c
index c456033..a5892fb 100644
--- a/ui-ssdiff.c
+++ b/ui-ssdiff.c
@@ -117,7 +117,7 @@ static char *replace_tabs(char *line)
 	int n_tabs = 0;
 	int i;
 	char *result;
-	int result_len;
+	size_t result_len;
 
 	if (linelen == 0) {
 		result = xmalloc(1);
@@ -136,10 +136,12 @@ static char *replace_tabs(char *line)
 	for (;;) {
 		cur_buf = strchr(prev_buf, '\t');
 		if (!cur_buf) {
-			strncat(result, prev_buf, result_len);
+			linelen = strlen(result);
+			strlcpy(&result[linelen], prev_buf, result_len - linelen + 1);
 			break;
 		} else {
-			strncat(result, prev_buf, cur_buf - prev_buf);
+			linelen = strlen(result);
+			strlcpy(&result[linelen], prev_buf, cur_buf - prev_buf + 1);
 			linelen = strlen(result);
 			memset(&result[linelen], ' ', 8 - (linelen % 8));
 			result[linelen + 8 - (linelen % 8)] = '\0';

[PATCH v2 1/1] ui-ssdiff: ban strncat()

[e]

Christian Hesse <list at eworm.de> wrote:
> From: Christian Hesse <mail at eworm.de>
> 
> Git version v2.21.0 marks strncat() as banned (commit
> ace5707a803eda0f1dde3d776dc3729d3bc7759a), so replace it.

Btw, I posted a similar-in-spirit patch to replace strncat
in ui-ssdiff.c back in January: <20190102073710.580-1-e at 80x24.org>

It uses strbuf and is close to code which already exists in
git.git, so it doesn't make calls to strlen() repeatedly.


(I'm also responsible for strncat banning in git.git :)

[PATCH v2 1/1] ui-ssdiff: ban strncat()

[list]

Eric Wong <e at 80x24.org> on Wed, 2019/02/13 08:29:
> Christian Hesse <list at eworm.de> wrote:
> > From: Christian Hesse <mail at eworm.de>
> > 
> > Git version v2.21.0 marks strncat() as banned (commit
> > ace5707a803eda0f1dde3d776dc3729d3bc7759a), so replace it.  
> 
> Btw, I posted a similar-in-spirit patch to replace strncat
> in ui-ssdiff.c back in January: <20190102073710.580-1-e at 80x24.org>
> 
> It uses strbuf and is close to code which already exists in
> git.git, so it doesn't make calls to strlen() repeatedly.
> 
> 
> (I'm also responsible for strncat banning in git.git :)

Ah, nice... I saw this but forgot about it. :-p

Jason, you are free to decide. ;)
-- 
main(a){char*c=/*    Schoene Gruesse                         */"B?IJj;MEH"
"CX:;",b;for(a/*    Best regards             my address:    */=0;b=c[a++];)
putchar(b-1/(/*    Chris            cc -ox -xc - && ./x    */b/42*2-3)*42);}
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