From 185c975faaa790a98a4e00f124461473283500d6 Mon Sep 17 00:00:00 2001 From: Junio C Hamano Date: Fri, 16 Feb 2007 22:43:48 -0800 Subject: [PATCH] Do not take mode bits from index after type change. When we do not trust executable bit from lstat(2), we copied existing ce_mode bits without checking if the filesystem object is a regular file (which is the only thing we apply the "trust executable bit" business) nor if the blob in the index is a regular file (otherwise, we should do the same as registering a new regular file, which is to default non-executable). Noticed by Johannes Sixt. Signed-off-by: Junio C Hamano --- builtin-apply.c | 2 +- builtin-update-index.c | 13 +++++++------ cache.h | 10 ++++++++++ diff-lib.c | 4 +--- read-cache.c | 13 +++++++------ t/t3700-add.sh | 20 ++++++++++++++++++++ 6 files changed, 46 insertions(+), 16 deletions(-) diff --git a/builtin-apply.c b/builtin-apply.c index 3fefdacd9..abe353871 100644 --- a/builtin-apply.c +++ b/builtin-apply.c @@ -1988,7 +1988,7 @@ static int check_patch(struct patch *patch, struct patch *prev_patch) return error("%s: %s", old_name, strerror(errno)); if (!cached) - st_mode = ntohl(create_ce_mode(st.st_mode)); + st_mode = ntohl(ce_mode_from_stat(ce, st.st_mode)); if (patch->is_new < 0) patch->is_new = 0; diff --git a/builtin-update-index.c b/builtin-update-index.c index 1ac613a78..772aaba7b 100644 --- a/builtin-update-index.c +++ b/builtin-update-index.c @@ -109,16 +109,17 @@ static int add_file_to_cache(const char *path) ce->ce_flags = htons(namelen); fill_stat_cache_info(ce, &st); - ce->ce_mode = create_ce_mode(st.st_mode); - if (!trust_executable_bit) { + if (trust_executable_bit) + ce->ce_mode = create_ce_mode(st.st_mode); + else { /* If there is an existing entry, pick the mode bits * from it, otherwise assume unexecutable. */ + struct cache_entry *ent; int pos = cache_name_pos(path, namelen); - if (0 <= pos) - ce->ce_mode = active_cache[pos]->ce_mode; - else if (S_ISREG(st.st_mode)) - ce->ce_mode = create_ce_mode(S_IFREG | 0666); + + ent = (0 <= pos) ? active_cache[pos] : NULL; + ce->ce_mode = ce_mode_from_stat(ent, st.st_mode); } if (index_path(ce->sha1, path, &st, !info_only)) diff --git a/cache.h b/cache.h index c62b0b090..04f8e63ba 100644 --- a/cache.h +++ b/cache.h @@ -106,6 +106,16 @@ static inline unsigned int create_ce_mode(unsigned int mode) return htonl(S_IFLNK); return htonl(S_IFREG | ce_permissions(mode)); } +static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode) +{ + extern int trust_executable_bit; + if (!trust_executable_bit && S_ISREG(mode)) { + if (ce && S_ISREG(ntohl(ce->ce_mode))) + return ce->ce_mode; + return create_ce_mode(0666); + } + return create_ce_mode(mode); +} #define canon_mode(mode) \ (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \ S_ISLNK(mode) ? S_IFLNK : S_IFDIR) diff --git a/diff-lib.c b/diff-lib.c index 91cd87742..556d5345b 100644 --- a/diff-lib.c +++ b/diff-lib.c @@ -170,9 +170,7 @@ static int get_stat_data(struct cache_entry *ce, } changed = ce_match_stat(ce, &st, 0); if (changed) { - mode = create_ce_mode(st.st_mode); - if (!trust_executable_bit && S_ISREG(st.st_mode)) - mode = ce->ce_mode; + mode = ce_mode_from_stat(ce, st.st_mode); sha1 = no_sha1; } } diff --git a/read-cache.c b/read-cache.c index c54a61187..605b35239 100644 --- a/read-cache.c +++ b/read-cache.c @@ -344,16 +344,17 @@ int add_file_to_index(const char *path, int verbose) ce->ce_flags = htons(namelen); fill_stat_cache_info(ce, &st); - ce->ce_mode = create_ce_mode(st.st_mode); - if (!trust_executable_bit) { + if (trust_executable_bit) + ce->ce_mode = create_ce_mode(st.st_mode); + else { /* If there is an existing entry, pick the mode bits * from it, otherwise assume unexecutable. */ + struct cache_entry *ent; int pos = cache_name_pos(path, namelen); - if (pos >= 0) - ce->ce_mode = active_cache[pos]->ce_mode; - else if (S_ISREG(st.st_mode)) - ce->ce_mode = create_ce_mode(S_IFREG | 0666); + + ent = (0 <= pos) ? active_cache[pos] : NULL; + ce->ce_mode = ce_mode_from_stat(ent, st.st_mode); } if (index_path(ce->sha1, path, &st, 1)) diff --git a/t/t3700-add.sh b/t/t3700-add.sh index caaab26c2..08e035220 100755 --- a/t/t3700-add.sh +++ b/t/t3700-add.sh @@ -30,6 +30,16 @@ test_expect_success \ *) echo fail; git-ls-files --stage xfoo1; (exit 1);; esac' +test_expect_success 'git-add: filemode=0 should not get confused by symlink' ' + rm -f xfoo1 && + ln -s foo xfoo1 && + git-add xfoo1 && + case "`git-ls-files --stage xfoo1`" in + 120000" "*xfoo1) echo ok;; + *) echo fail; git-ls-files --stage xfoo1; (exit 1);; + esac +' + test_expect_success \ 'git-update-index --add: Test that executable bit is not used...' \ 'git config core.filemode 0 && @@ -41,6 +51,16 @@ test_expect_success \ *) echo fail; git-ls-files --stage xfoo2; (exit 1);; esac' +test_expect_success 'git-add: filemode=0 should not get confused by symlink' ' + rm -f xfoo2 && + ln -s foo xfoo2 && + git update-index --add xfoo2 && + case "`git-ls-files --stage xfoo2`" in + 120000" "*xfoo2) echo ok;; + *) echo fail; git-ls-files --stage xfoo2; (exit 1);; + esac +' + test_expect_success \ 'git-update-index --add: Test that executable bit is not used...' \ 'git config core.filemode 0 && -- 2.30.2