diff options
| -rw-r--r-- | compat/mingw.h | 4 | ||||
| -rw-r--r-- | git-compat-util.h | 4 | ||||
| -rw-r--r-- | lockfile.h | 4 | ||||
| -rwxr-xr-x | t/t6026-merge-attr.sh | 13 | ||||
| -rw-r--r-- | tempfile.c | 7 | ||||
| -rw-r--r-- | tempfile.h | 4 |
6 files changed, 35 insertions, 1 deletions
diff --git a/compat/mingw.h b/compat/mingw.h index 2cadb816ee..034fff9479 100644 --- a/compat/mingw.h +++ b/compat/mingw.h @@ -67,6 +67,10 @@ typedef int pid_t; #define F_SETFD 2 #define FD_CLOEXEC 0x1 +#if !defined O_CLOEXEC && defined O_NOINHERIT +#define O_CLOEXEC O_NOINHERIT +#endif + #ifndef EAFNOSUPPORT #define EAFNOSUPPORT WSAEAFNOSUPPORT #endif diff --git a/git-compat-util.h b/git-compat-util.h index f52e00b580..db89ba7748 100644 --- a/git-compat-util.h +++ b/git-compat-util.h @@ -667,6 +667,10 @@ void *gitmemmem(const void *haystack, size_t haystacklen, #define getpagesize() sysconf(_SC_PAGESIZE) #endif +#ifndef O_CLOEXEC +#define O_CLOEXEC 0 +#endif + #ifdef FREAD_READS_DIRECTORIES #ifdef fopen #undef fopen diff --git a/lockfile.h b/lockfile.h index 3d301937b0..d26ad27b2b 100644 --- a/lockfile.h +++ b/lockfile.h @@ -55,6 +55,10 @@ * * calling `fdopen_lock_file()` to get a `FILE` pointer for the * open file and writing to the file using stdio. * + * Note that the file descriptor returned by hold_lock_file_for_update() + * is marked O_CLOEXEC, so the new contents must be written by the + * current process, not a spawned one. + * * When finished writing, the caller can: * * * Close the file descriptor and rename the lockfile to its final diff --git a/t/t6026-merge-attr.sh b/t/t6026-merge-attr.sh index ef0cbceafe..dd8f88d187 100755 --- a/t/t6026-merge-attr.sh +++ b/t/t6026-merge-attr.sh @@ -181,4 +181,17 @@ test_expect_success 'up-to-date merge without common ancestor' ' ) ' +test_expect_success 'custom merge does not lock index' ' + git reset --hard anchor && + write_script sleep-one-second.sh <<-\EOF && + sleep 1 & + EOF + + test_write_lines >.gitattributes \ + "* merge=ours" "text merge=sleep-one-second" && + test_config merge.ours.driver true && + test_config merge.sleep-one-second.driver ./sleep-one-second.sh && + git merge master +' + test_done diff --git a/tempfile.c b/tempfile.c index 0af7ebf016..2990c92424 100644 --- a/tempfile.c +++ b/tempfile.c @@ -120,7 +120,12 @@ int create_tempfile(struct tempfile *tempfile, const char *path) prepare_tempfile_object(tempfile); strbuf_add_absolute_path(&tempfile->filename, path); - tempfile->fd = open(tempfile->filename.buf, O_RDWR | O_CREAT | O_EXCL, 0666); + tempfile->fd = open(tempfile->filename.buf, + O_RDWR | O_CREAT | O_EXCL | O_CLOEXEC, 0666); + if (O_CLOEXEC && tempfile->fd < 0 && errno == EINVAL) + /* Try again w/o O_CLOEXEC: the kernel might not support it */ + tempfile->fd = open(tempfile->filename.buf, + O_RDWR | O_CREAT | O_EXCL, 0666); if (tempfile->fd < 0) { strbuf_reset(&tempfile->filename); return -1; diff --git a/tempfile.h b/tempfile.h index 4219fe41bd..2f0038decd 100644 --- a/tempfile.h +++ b/tempfile.h @@ -33,6 +33,10 @@ * * calling `fdopen_tempfile()` to get a `FILE` pointer for the * open file and writing to the file using stdio. * + * Note that the file descriptor returned by create_tempfile() + * is marked O_CLOEXEC, so the new contents must be written by + * the current process, not any spawned one. + * * When finished writing, the caller can: * * * Close the file descriptor and remove the temporary file by |