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Jeff King 0730dd4ffb difftool: avoid strcpy 
In order to checkout files, difftool reads "diff --raw"
output and feeds the names to checkout_entry(). That
function requires us to have a "struct cache_entry". And
because that struct uses a FLEX_ARRAY for the name field, we
have to actually copy in our new name.

The current code allocates a single re-usable cache_entry
that can hold a name up to PATH_MAX, and then copies
filenames into it using strcpy(). But there's no guarantee
that incoming names are smaller than PATH_MAX. They've come
from "diff --raw" output which might be diffing between two
trees (and hence we'd be subject to the PATH_MAX of some
other system, or even none at all if they were created
directly via "update-index").

We can fix this by using make_cache_entry() to create a
correctly-sized cache_entry for each name. This incurs an
extra allocation per file, but this is negligible compared
to actually writing out the file contents.

To make this simpler, we can push this procedure into a new
helper function. Note that we can also get rid of the "len"
variables for src_path and dst_path (and in fact we must, as
the compiler complains that they are unused).

Signed-off-by: Jeff King <peff@peff.net>
Acked-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-30 13:02:16 -07:00
..
add.c add: modify already added files when --chmod is given 2016-09-15 12:13:54 -07:00
am.c Merge branch 'bc/object-id' 2016-09-19 13:47:19 -07:00
annotate.c
apply.c Convert read_mmblob to take struct object_id. 2016-09-07 12:59:42 -07:00
archive.c archive: read local configuration 2016-11-22 13:55:20 -08:00
bisect--helper.c
blame.c Merge branch 'jc/blame-reverse' 2016-10-10 14:03:51 -07:00
branch.c Merge branch 'jk/create-branch-remove-unused-param' 2016-11-17 13:45:21 -08:00
bundle.c
cat-file.c Merge branch 'jk/pack-objects-optim-mru' 2016-10-10 14:03:47 -07:00
check-attr.c give "nbuf" strbuf a more meaningful name 2016-02-01 13:43:02 -08:00
check-ignore.c give "nbuf" strbuf a more meaningful name 2016-02-01 13:43:02 -08:00
check-mailmap.c strbuf: introduce strbuf_getline_{lf,nul}() 2016-01-15 10:12:51 -08:00
check-ref-format.c use xmallocz to avoid size arithmetic 2016-02-22 14:51:09 -08:00
checkout-index.c introduce CHECKOUT_INIT 2016-09-22 13:42:18 -07:00
checkout.c Merge branch 'jk/create-branch-remove-unused-param' 2016-11-17 13:45:21 -08:00
clean.c Merge branch 'jk/tighten-alloc' 2016-02-26 13:37:16 -08:00
clone.c Merge branch 'jk/clone-copy-alternates-fix' 2016-10-17 13:25:18 -07:00
column.c column: read lines with strbuf_getline() 2016-01-15 10:35:07 -08:00
commit-tree.c builtin/commit-tree: convert to struct object_id 2016-09-07 12:59:43 -07:00
commit.c Merge branch 'rs/commit-pptr-simplify' 2016-10-31 13:15:25 -07:00
config.c i18n: config: mark error message for translation 2016-09-15 13:17:32 -07:00
count-objects.c alternates: use fspathcmp to detect duplicates 2016-10-10 13:52:37 -07:00
credential.c
describe.c use QSORT 2016-09-29 15:42:18 -07:00
diff-files.c diff: run arguments through precompose_argv 2016-05-13 14:35:49 -07:00
diff-index.c diff: run arguments through precompose_argv 2016-05-13 14:35:49 -07:00
diff-tree.c Merge branch 'ar/diff-args-osx-precompose' into maint 2016-06-06 14:27:35 -07:00
diff.c Merge branch 'jk/setup-sequence-update' 2016-09-21 15:15:24 -07:00
difftool.c difftool: avoid strcpy 2017-03-30 13:02:16 -07:00
fast-export.c use QSORT 2016-09-29 15:42:18 -07:00
fetch-pack.c Merge branch 'nd/shallow-deepen' 2016-10-10 14:03:50 -07:00
fetch.c Merge branch 'jc/abbrev-auto' 2016-10-27 14:58:48 -07:00
fmt-merge-msg.c remove unnecessary check before QSORT 2016-09-29 15:42:18 -07:00
for-each-ref.c ref-filter: add option to match literal pattern 2015-09-17 10:02:49 -07:00
fsck.c alternates: use a separate scratch space 2016-10-10 13:52:36 -07:00
gc.c Merge branch 'jk/reduce-gc-aggressive-depth' 2016-09-21 15:15:30 -07:00
get-tar-commit-id.c usage: do not insist that standard input must come from a file 2015-10-16 15:27:52 -07:00
grep.c cache: convert struct cache_entry to use struct object_id 2016-09-07 12:59:42 -07:00
hash-object.c hash-object: always try to set up the git repository 2016-09-13 15:45:45 -07:00
help.c Merge branch 'js/no-html-bypass-on-windows' into maint 2016-09-08 21:35:55 -07:00
index-pack.c use QSORT, part 2 2016-09-29 20:40:23 -07:00
init-db.c Merge branch 'nd/init-core-worktree-in-multi-worktree-world' 2016-10-03 13:30:35 -07:00
interpret-trailers.c Merge branch 'jk/parseopt-string-list' into jk/string-list-static-init 2016-06-13 10:37:48 -07:00
log.c Merge branch 'jt/format-patch-rfc' 2016-09-26 16:09:17 -07:00
ls-files.c Merge branch 'bw/ls-files-recurse-submodules' 2016-10-26 13:14:44 -07:00
ls-remote.c ls-remote: add support for showing symrefs 2016-01-19 10:07:56 -08:00
ls-tree.c convert trivial sprintf / strcpy calls to xsnprintf 2015-09-25 10:18:18 -07:00
mailinfo.c mailinfo: read local configuration 2016-11-22 13:13:16 -08:00
mailsplit.c mailsplit: support unescaping mboxrd messages 2016-06-06 11:14:43 -07:00
merge-base.c merge-base: handle --fork-point without reflog 2016-10-12 14:30:16 -07:00
merge-file.c builtin/merge-file.c: use error_errno() 2016-05-09 12:29:08 -07:00
merge-index.c cache: convert struct cache_entry to use struct object_id 2016-09-07 12:59:42 -07:00
merge-ours.c
merge-recursive.c i18n: merge-recursive: mark verbose message for translation 2016-09-15 13:17:32 -07:00
merge-tree.c struct name_entry: use struct object_id instead of unsigned char sha1[20] 2016-04-25 14:23:42 -07:00
merge.c find_unique_abbrev: use 4-buffer ring 2016-10-26 13:30:51 -07:00
mktag.c usage: do not insist that standard input must come from a file 2015-10-16 15:27:52 -07:00
mktree.c use QSORT 2016-09-29 15:42:18 -07:00
mv.c Merge branch 'rs/copy-array' 2016-10-03 13:30:33 -07:00
name-rev.c use QSORT 2016-09-29 15:42:18 -07:00
notes.c notes: spell first word of error messages in lowercase 2016-09-15 13:17:32 -07:00
pack-objects.c sha1_file: rename git_open_noatime() to git_open() 2016-10-25 10:59:13 -07:00
pack-redundant.c convert trivial cases to ALLOC_ARRAY 2016-02-22 14:51:09 -08:00
pack-refs.c
patch-id.c Merge branch 'rs/patch-id-use-skip-prefix' 2016-06-03 14:38:03 -07:00
prune-packed.c
prune.c Merge branch 'jk/repository-extension' into maint 2015-11-03 15:32:25 -08:00
pull.c wt-status: teach has_{unstaged,uncommitted}_changes() about submodules 2016-10-07 09:29:31 -07:00
push.c push: accept push options 2016-07-14 15:50:41 -07:00
read-tree.c cache: convert struct cache_entry to use struct object_id 2016-09-07 12:59:42 -07:00
receive-pack.c Merge branch 'ls/filter-process' 2016-10-31 13:15:21 -07:00
reflog.c struct name_entry: use struct object_id instead of unsigned char sha1[20] 2016-04-25 14:23:42 -07:00
remote-ext.c pkt-line: rename packet_write() to packet_write_fmt() 2016-10-17 11:36:50 -07:00
remote-fd.c
remote.c use QSORT 2016-09-29 15:42:18 -07:00
repack.c Merge branch 'va/i18n-even-more' 2016-07-13 11:24:10 -07:00
replace.c Merge branch 'js/replace-edit-use-editor-configuration' into maint 2016-05-06 14:53:24 -07:00
rerere.c Sync with 2.6.1 2015-10-05 13:20:08 -07:00
reset.c Merge branch 'js/reset-usage' 2016-10-17 13:25:22 -07:00
rev-list.c rev-list: use hdr_termination instead of a always using a newline 2016-10-20 14:44:37 -07:00
rev-parse.c Merge branch 'lt/abbrev-auto' 2016-10-27 14:58:47 -07:00
revert.c sequencer: get rid of the subcommand field 2016-10-21 09:32:34 -07:00
rm.c builtin/rm: convert to use struct object_id 2016-09-07 12:59:42 -07:00
send-pack.c Merge branch 'sk/send-pack-all-fix' into maint 2016-04-29 14:15:57 -07:00
shortlog.c use QSORT, part 2 2016-09-29 20:40:23 -07:00
show-branch.c show-branch: use QSORT 2016-10-03 12:46:47 -07:00
show-ref.c show-ref: stop using PARSE_OPT_NO_INTERNAL_HELP 2015-11-20 08:02:07 -05:00
stripspace.c stripspace: respect repository config 2016-11-21 11:00:38 -08:00
submodule--helper.c Merge branch 'sb/submodule-ignore-trailing-slash' 2016-10-27 14:58:49 -07:00
symbolic-ref.c symbolic-ref -d: do not allow removal of HEAD 2016-09-02 09:01:38 -07:00
tag.c Merge branch 'st/verify-tag' 2016-04-29 12:59:09 -07:00
unpack-file.c convert trivial sprintf / strcpy calls to xsnprintf 2015-09-25 10:18:18 -07:00
unpack-objects.c unpack-objects: add --max-input-size=<size> option 2016-08-24 12:31:05 -07:00
update-index.c Merge branch 'tg/add-chmod+x-fix' 2016-09-26 16:09:20 -07:00
update-ref.c tag, update-ref: improve description of option "create-reflog" 2015-09-11 09:50:02 -07:00
update-server-info.c
upload-archive.c archive: read local configuration 2016-11-22 13:55:20 -08:00
var.c
verify-commit.c verify-commit: add option to print raw gpg status information 2015-06-22 14:20:47 -07:00
verify-pack.c
verify-tag.c verify-tag: move tag verification code to tag.c 2016-04-22 14:06:46 -07:00
worktree.c worktree: honor configuration variables 2016-09-27 10:51:33 -07:00
write-tree.c