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| author | Junio C Hamano <gitster@pobox.com> | 2017-10-03 15:42:49 +0900 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2017-10-03 15:42:49 +0900 |
| commit | cb1083ca23c2f78140b66b925ed0b82fe400eea5 (patch) | |
| tree | c78509d2b9fbe79c99ed1acb83bf43886b4d0c0c /packfile.c | |
| parent | d4e93836a6a072e392b20d7daf604fd41e15ecf9 (diff) | |
| parent | 8a1a8d2ad1b41a0a28d37d1d21ee9620a23e91eb (diff) | |
| download | git-cb1083ca23c2f78140b66b925ed0b82fe400eea5.tar.gz | |
Merge branch 'jk/read-in-full'
Code clean-up to prevent future mistakes by copying and pasting
code that checks the result of read_in_full() function.
* jk/read-in-full:
worktree: check the result of read_in_full()
worktree: use xsize_t to access file size
distinguish error versus short read from read_in_full()
avoid looking at errno for short read_in_full() returns
prefer "!=" when checking read_in_full() result
notes-merge: drop dead zero-write code
files-backend: prefer "0" for write_in_full() error check
Diffstat (limited to 'packfile.c')
| -rw-r--r-- | packfile.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/packfile.c b/packfile.c index f69a5c8d60..eab7542487 100644 --- a/packfile.c +++ b/packfile.c @@ -442,6 +442,7 @@ static int open_packed_git_1(struct packed_git *p) unsigned char sha1[20]; unsigned char *idx_sha1; long fd_flag; + ssize_t read_result; if (!p->index_data && open_pack_index(p)) return error("packfile %s index unavailable", p->pack_name); @@ -483,7 +484,10 @@ static int open_packed_git_1(struct packed_git *p) return error("cannot set FD_CLOEXEC"); /* Verify we recognize this pack file format. */ - if (read_in_full(p->pack_fd, &hdr, sizeof(hdr)) != sizeof(hdr)) + read_result = read_in_full(p->pack_fd, &hdr, sizeof(hdr)); + if (read_result < 0) + return error_errno("error reading from %s", p->pack_name); + if (read_result != sizeof(hdr)) return error("file %s is far too short to be a packfile", p->pack_name); if (hdr.hdr_signature != htonl(PACK_SIGNATURE)) return error("file %s is not a GIT packfile", p->pack_name); @@ -500,7 +504,10 @@ static int open_packed_git_1(struct packed_git *p) p->num_objects); if (lseek(p->pack_fd, p->pack_size - sizeof(sha1), SEEK_SET) == -1) return error("end of packfile %s is unavailable", p->pack_name); - if (read_in_full(p->pack_fd, sha1, sizeof(sha1)) != sizeof(sha1)) + read_result = read_in_full(p->pack_fd, sha1, sizeof(sha1)); + if (read_result < 0) + return error_errno("error reading from %s", p->pack_name); + if (read_result != sizeof(sha1)) return error("packfile %s signature is unavailable", p->pack_name); idx_sha1 = ((unsigned char *)p->index_data) + p->index_size - 40; if (hashcmp(sha1, idx_sha1)) |