From 2edffef2337eae691a454a072e0f9b9538725317 Mon Sep 17 00:00:00 2001 From: Jeff King Date: Tue, 27 Sep 2016 16:59:50 -0400 Subject: tree-walk: be more specific about corrupt tree errors When the tree-walker runs into an error, it just calls die(), and the message is always "corrupt tree file". However, we are actually covering several cases here; let's give the user a hint about what happened. Let's also avoid using the word "corrupt", which makes it seem like the data bit-rotted on disk. Our sha1 check would already have found that. These errors are ones of data that is malformed in the first place. Signed-off-by: David Turner Signed-off-by: Jeff King Signed-off-by: Junio C Hamano --- t/t1007-hash-object.sh | 25 +++++++++++++++++++++++-- tree-walk.c | 12 +++++++----- 2 files changed, 30 insertions(+), 7 deletions(-) diff --git a/t/t1007-hash-object.sh b/t/t1007-hash-object.sh index acca9ac562..c5245c5cb4 100755 --- a/t/t1007-hash-object.sh +++ b/t/t1007-hash-object.sh @@ -183,9 +183,30 @@ for args in "-w --stdin-paths" "--stdin-paths -w"; do pop_repo done -test_expect_success 'corrupt tree' ' +test_expect_success 'too-short tree' ' echo abc >malformed-tree && - test_must_fail git hash-object -t tree malformed-tree + test_must_fail git hash-object -t tree malformed-tree 2>err && + test_i18ngrep "too-short tree object" err +' + +hex2oct() { + perl -ne 'printf "\\%03o", hex for /../g' +} + +test_expect_success 'malformed mode in tree' ' + hex_sha1=$(echo foo | git hash-object --stdin -w) && + bin_sha1=$(echo $hex_sha1 | hex2oct) && + printf "9100644 \0$bin_sha1" >tree-with-malformed-mode && + test_must_fail git hash-object -t tree tree-with-malformed-mode 2>err && + test_i18ngrep "malformed mode in tree entry" err +' + +test_expect_success 'empty filename in tree' ' + hex_sha1=$(echo foo | git hash-object --stdin -w) && + bin_sha1=$(echo $hex_sha1 | hex2oct) && + printf "100644 \0$bin_sha1" >tree-with-empty-filename && + test_must_fail git hash-object -t tree tree-with-empty-filename 2>err && + test_i18ngrep "empty filename in tree entry" err ' test_expect_success 'corrupt commit' ' diff --git a/tree-walk.c b/tree-walk.c index ce27842439..24f9a0f14a 100644 --- a/tree-walk.c +++ b/tree-walk.c @@ -27,12 +27,14 @@ static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned const char *path; unsigned int mode, len; - if (size < 24 || buf[size - 21]) - die("corrupt tree file"); + if (size < 23 || buf[size - 21]) + die(_("too-short tree object")); path = get_mode(buf, &mode); - if (!path || !*path) - die("corrupt tree file"); + if (!path) + die(_("malformed mode in tree entry for tree")); + if (!*path) + die(_("empty filename in tree entry for tree")); len = strlen(path) + 1; /* Initialize the descriptor entry */ @@ -81,7 +83,7 @@ void update_tree_entry(struct tree_desc *desc) unsigned long len = end - (const unsigned char *)buf; if (size < len) - die("corrupt tree file"); + die(_("too-short tree file")); buf = end; size -= len; desc->buffer = buf; -- cgit v1.2.3