mirror of
https://github.com/git/git.git
synced 2024-10-31 06:17:56 +01:00
159e7b080b
In preparation for performing fsck checks on .gitmodules files, this commit plumbs in the actual detection of the files. Note that unlike most other fsck checks, this cannot be a property of a single object: we must know that the object is found at a ".gitmodules" path at the root tree of a commit. Since the fsck code only sees one object at a time, we have to mark the related objects to fit the puzzle together. When we see a commit we mark its tree as a root tree, and when we see a root tree with a .gitmodules file, we mark the corresponding blob to be checked. In an ideal world, we'd check the objects in topological order: commits followed by trees followed by blobs. In that case we can avoid ever loading an object twice, since all markings would be complete by the time we get to the marked objects. And indeed, if we are checking a single packfile, this is the order in which Git will generally write the objects. But we can't count on that: 1. git-fsck may show us the objects in arbitrary order (loose objects are fed in sha1 order, but we may also have multiple packs, and we process each pack fully in sequence). 2. The type ordering is just what git-pack-objects happens to write now. The pack format does not require a specific order, and it's possible that future versions of Git (or a custom version trying to fool official Git's fsck checks!) may order it differently. 3. We may not even be fscking all of the relevant objects at once. Consider pushing with transfer.fsckObjects, where one push adds a blob at path "foo", and then a second push adds the same blob at path ".gitmodules". The blob is not part of the second push at all, but we need to mark and check it. So in the general case, we need to make up to three passes over the objects: once to make sure we've seen all commits, then once to cover any trees we might have missed, and then a final pass to cover any .gitmodules blobs we found in the second pass. We can simplify things a bit by loosening the requirement that we find .gitmodules only at root trees. Technically a file like "subdir/.gitmodules" is not parsed by Git, but it's not unreasonable for us to declare that Git is aware of all ".gitmodules" files and make them eligible for checking. That lets us drop the root-tree requirement, which eliminates one pass entirely. And it makes our worst case much better: instead of potentially queueing every root tree to be re-examined, the worst case is that we queue each unique .gitmodules blob for a second look. This patch just adds the boilerplate to find .gitmodules files. The actual content checks will come in a subsequent commit. Signed-off-by: Jeff King <peff@peff.net>
996 lines
26 KiB
C
996 lines
26 KiB
C
#include "cache.h"
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#include "object.h"
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#include "blob.h"
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#include "tree.h"
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#include "tree-walk.h"
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#include "commit.h"
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#include "tag.h"
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#include "fsck.h"
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#include "refs.h"
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#include "utf8.h"
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#include "sha1-array.h"
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#include "decorate.h"
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#include "oidset.h"
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static struct oidset gitmodules_found = OIDSET_INIT;
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static struct oidset gitmodules_done = OIDSET_INIT;
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#define FSCK_FATAL -1
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#define FSCK_INFO -2
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#define FOREACH_MSG_ID(FUNC) \
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/* fatal errors */ \
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FUNC(NUL_IN_HEADER, FATAL) \
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FUNC(UNTERMINATED_HEADER, FATAL) \
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/* errors */ \
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FUNC(BAD_DATE, ERROR) \
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FUNC(BAD_DATE_OVERFLOW, ERROR) \
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FUNC(BAD_EMAIL, ERROR) \
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FUNC(BAD_NAME, ERROR) \
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FUNC(BAD_OBJECT_SHA1, ERROR) \
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FUNC(BAD_PARENT_SHA1, ERROR) \
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FUNC(BAD_TAG_OBJECT, ERROR) \
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FUNC(BAD_TIMEZONE, ERROR) \
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FUNC(BAD_TREE, ERROR) \
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FUNC(BAD_TREE_SHA1, ERROR) \
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FUNC(BAD_TYPE, ERROR) \
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FUNC(DUPLICATE_ENTRIES, ERROR) \
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FUNC(MISSING_AUTHOR, ERROR) \
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FUNC(MISSING_COMMITTER, ERROR) \
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FUNC(MISSING_EMAIL, ERROR) \
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FUNC(MISSING_GRAFT, ERROR) \
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FUNC(MISSING_NAME_BEFORE_EMAIL, ERROR) \
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FUNC(MISSING_OBJECT, ERROR) \
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FUNC(MISSING_PARENT, ERROR) \
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FUNC(MISSING_SPACE_BEFORE_DATE, ERROR) \
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FUNC(MISSING_SPACE_BEFORE_EMAIL, ERROR) \
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FUNC(MISSING_TAG, ERROR) \
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FUNC(MISSING_TAG_ENTRY, ERROR) \
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FUNC(MISSING_TAG_OBJECT, ERROR) \
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FUNC(MISSING_TREE, ERROR) \
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FUNC(MISSING_TREE_OBJECT, ERROR) \
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FUNC(MISSING_TYPE, ERROR) \
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FUNC(MISSING_TYPE_ENTRY, ERROR) \
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FUNC(MULTIPLE_AUTHORS, ERROR) \
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FUNC(TAG_OBJECT_NOT_TAG, ERROR) \
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FUNC(TREE_NOT_SORTED, ERROR) \
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FUNC(UNKNOWN_TYPE, ERROR) \
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FUNC(ZERO_PADDED_DATE, ERROR) \
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FUNC(GITMODULES_MISSING, ERROR) \
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FUNC(GITMODULES_BLOB, ERROR) \
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/* warnings */ \
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FUNC(BAD_FILEMODE, WARN) \
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FUNC(EMPTY_NAME, WARN) \
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FUNC(FULL_PATHNAME, WARN) \
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FUNC(HAS_DOT, WARN) \
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FUNC(HAS_DOTDOT, WARN) \
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FUNC(HAS_DOTGIT, WARN) \
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FUNC(NULL_SHA1, WARN) \
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FUNC(ZERO_PADDED_FILEMODE, WARN) \
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FUNC(NUL_IN_COMMIT, WARN) \
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/* infos (reported as warnings, but ignored by default) */ \
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FUNC(BAD_TAG_NAME, INFO) \
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FUNC(MISSING_TAGGER_ENTRY, INFO)
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#define MSG_ID(id, msg_type) FSCK_MSG_##id,
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enum fsck_msg_id {
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FOREACH_MSG_ID(MSG_ID)
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FSCK_MSG_MAX
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};
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#undef MSG_ID
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#define STR(x) #x
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#define MSG_ID(id, msg_type) { STR(id), NULL, FSCK_##msg_type },
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static struct {
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const char *id_string;
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const char *downcased;
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int msg_type;
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} msg_id_info[FSCK_MSG_MAX + 1] = {
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FOREACH_MSG_ID(MSG_ID)
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{ NULL, NULL, -1 }
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};
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#undef MSG_ID
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static int parse_msg_id(const char *text)
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{
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int i;
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if (!msg_id_info[0].downcased) {
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/* convert id_string to lower case, without underscores. */
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for (i = 0; i < FSCK_MSG_MAX; i++) {
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const char *p = msg_id_info[i].id_string;
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int len = strlen(p);
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char *q = xmalloc(len);
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msg_id_info[i].downcased = q;
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while (*p)
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if (*p == '_')
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p++;
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else
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*(q)++ = tolower(*(p)++);
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*q = '\0';
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}
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}
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for (i = 0; i < FSCK_MSG_MAX; i++)
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if (!strcmp(text, msg_id_info[i].downcased))
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return i;
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return -1;
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}
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static int fsck_msg_type(enum fsck_msg_id msg_id,
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struct fsck_options *options)
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{
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int msg_type;
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assert(msg_id >= 0 && msg_id < FSCK_MSG_MAX);
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if (options->msg_type)
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msg_type = options->msg_type[msg_id];
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else {
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msg_type = msg_id_info[msg_id].msg_type;
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if (options->strict && msg_type == FSCK_WARN)
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msg_type = FSCK_ERROR;
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}
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return msg_type;
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}
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static void init_skiplist(struct fsck_options *options, const char *path)
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{
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static struct oid_array skiplist = OID_ARRAY_INIT;
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int sorted, fd;
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char buffer[GIT_MAX_HEXSZ + 1];
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struct object_id oid;
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if (options->skiplist)
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sorted = options->skiplist->sorted;
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else {
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sorted = 1;
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options->skiplist = &skiplist;
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}
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fd = open(path, O_RDONLY);
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if (fd < 0)
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die("Could not open skip list: %s", path);
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for (;;) {
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const char *p;
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int result = read_in_full(fd, buffer, sizeof(buffer));
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if (result < 0)
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die_errno("Could not read '%s'", path);
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if (!result)
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break;
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if (parse_oid_hex(buffer, &oid, &p) || *p != '\n')
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die("Invalid SHA-1: %s", buffer);
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oid_array_append(&skiplist, &oid);
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if (sorted && skiplist.nr > 1 &&
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oidcmp(&skiplist.oid[skiplist.nr - 2],
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&oid) > 0)
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sorted = 0;
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}
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close(fd);
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if (sorted)
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skiplist.sorted = 1;
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}
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static int parse_msg_type(const char *str)
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{
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if (!strcmp(str, "error"))
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return FSCK_ERROR;
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else if (!strcmp(str, "warn"))
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return FSCK_WARN;
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else if (!strcmp(str, "ignore"))
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return FSCK_IGNORE;
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else
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die("Unknown fsck message type: '%s'", str);
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}
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int is_valid_msg_type(const char *msg_id, const char *msg_type)
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{
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if (parse_msg_id(msg_id) < 0)
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return 0;
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parse_msg_type(msg_type);
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return 1;
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}
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void fsck_set_msg_type(struct fsck_options *options,
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const char *msg_id, const char *msg_type)
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{
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int id = parse_msg_id(msg_id), type;
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if (id < 0)
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die("Unhandled message id: %s", msg_id);
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type = parse_msg_type(msg_type);
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if (type != FSCK_ERROR && msg_id_info[id].msg_type == FSCK_FATAL)
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die("Cannot demote %s to %s", msg_id, msg_type);
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if (!options->msg_type) {
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int i;
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int *msg_type;
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ALLOC_ARRAY(msg_type, FSCK_MSG_MAX);
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for (i = 0; i < FSCK_MSG_MAX; i++)
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msg_type[i] = fsck_msg_type(i, options);
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options->msg_type = msg_type;
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}
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options->msg_type[id] = type;
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}
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void fsck_set_msg_types(struct fsck_options *options, const char *values)
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{
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char *buf = xstrdup(values), *to_free = buf;
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int done = 0;
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while (!done) {
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int len = strcspn(buf, " ,|"), equal;
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done = !buf[len];
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if (!len) {
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buf++;
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continue;
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}
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buf[len] = '\0';
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for (equal = 0;
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equal < len && buf[equal] != '=' && buf[equal] != ':';
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equal++)
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buf[equal] = tolower(buf[equal]);
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buf[equal] = '\0';
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if (!strcmp(buf, "skiplist")) {
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if (equal == len)
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die("skiplist requires a path");
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init_skiplist(options, buf + equal + 1);
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buf += len + 1;
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continue;
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}
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if (equal == len)
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die("Missing '=': '%s'", buf);
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fsck_set_msg_type(options, buf, buf + equal + 1);
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buf += len + 1;
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}
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free(to_free);
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}
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static void append_msg_id(struct strbuf *sb, const char *msg_id)
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{
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for (;;) {
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char c = *(msg_id)++;
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if (!c)
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break;
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if (c != '_')
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strbuf_addch(sb, tolower(c));
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else {
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assert(*msg_id);
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strbuf_addch(sb, *(msg_id)++);
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}
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}
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strbuf_addstr(sb, ": ");
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}
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__attribute__((format (printf, 4, 5)))
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static int report(struct fsck_options *options, struct object *object,
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enum fsck_msg_id id, const char *fmt, ...)
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{
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va_list ap;
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struct strbuf sb = STRBUF_INIT;
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int msg_type = fsck_msg_type(id, options), result;
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if (msg_type == FSCK_IGNORE)
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return 0;
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if (options->skiplist && object &&
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oid_array_lookup(options->skiplist, &object->oid) >= 0)
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return 0;
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if (msg_type == FSCK_FATAL)
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msg_type = FSCK_ERROR;
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else if (msg_type == FSCK_INFO)
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msg_type = FSCK_WARN;
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append_msg_id(&sb, msg_id_info[id].id_string);
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va_start(ap, fmt);
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strbuf_vaddf(&sb, fmt, ap);
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result = options->error_func(options, object, msg_type, sb.buf);
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strbuf_release(&sb);
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va_end(ap);
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return result;
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}
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static char *get_object_name(struct fsck_options *options, struct object *obj)
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{
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if (!options->object_names)
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return NULL;
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return lookup_decoration(options->object_names, obj);
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}
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static void put_object_name(struct fsck_options *options, struct object *obj,
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const char *fmt, ...)
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{
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va_list ap;
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struct strbuf buf = STRBUF_INIT;
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char *existing;
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if (!options->object_names)
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return;
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existing = lookup_decoration(options->object_names, obj);
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if (existing)
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return;
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va_start(ap, fmt);
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strbuf_vaddf(&buf, fmt, ap);
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add_decoration(options->object_names, obj, strbuf_detach(&buf, NULL));
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va_end(ap);
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}
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static const char *describe_object(struct fsck_options *o, struct object *obj)
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{
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static struct strbuf buf = STRBUF_INIT;
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char *name;
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strbuf_reset(&buf);
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strbuf_addstr(&buf, oid_to_hex(&obj->oid));
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if (o->object_names && (name = lookup_decoration(o->object_names, obj)))
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strbuf_addf(&buf, " (%s)", name);
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return buf.buf;
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}
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static int fsck_walk_tree(struct tree *tree, void *data, struct fsck_options *options)
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{
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struct tree_desc desc;
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struct name_entry entry;
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int res = 0;
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const char *name;
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if (parse_tree(tree))
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return -1;
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name = get_object_name(options, &tree->object);
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if (init_tree_desc_gently(&desc, tree->buffer, tree->size))
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return -1;
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while (tree_entry_gently(&desc, &entry)) {
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struct object *obj;
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int result;
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if (S_ISGITLINK(entry.mode))
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continue;
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if (S_ISDIR(entry.mode)) {
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obj = (struct object *)lookup_tree(entry.oid);
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if (name && obj)
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put_object_name(options, obj, "%s%s/", name,
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entry.path);
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result = options->walk(obj, OBJ_TREE, data, options);
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}
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else if (S_ISREG(entry.mode) || S_ISLNK(entry.mode)) {
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obj = (struct object *)lookup_blob(entry.oid);
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if (name && obj)
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put_object_name(options, obj, "%s%s", name,
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entry.path);
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result = options->walk(obj, OBJ_BLOB, data, options);
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}
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else {
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result = error("in tree %s: entry %s has bad mode %.6o",
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describe_object(options, &tree->object), entry.path, entry.mode);
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}
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if (result < 0)
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return result;
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if (!res)
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res = result;
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}
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return res;
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}
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static int fsck_walk_commit(struct commit *commit, void *data, struct fsck_options *options)
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{
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int counter = 0, generation = 0, name_prefix_len = 0;
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struct commit_list *parents;
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int res;
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int result;
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const char *name;
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if (parse_commit(commit))
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return -1;
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name = get_object_name(options, &commit->object);
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if (name)
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put_object_name(options, &commit->tree->object, "%s:", name);
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result = options->walk((struct object *)commit->tree, OBJ_TREE, data, options);
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if (result < 0)
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return result;
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res = result;
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parents = commit->parents;
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if (name && parents) {
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int len = strlen(name), power;
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if (len && name[len - 1] == '^') {
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generation = 1;
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name_prefix_len = len - 1;
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}
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else { /* parse ~<generation> suffix */
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for (generation = 0, power = 1;
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len && isdigit(name[len - 1]);
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power *= 10)
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generation += power * (name[--len] - '0');
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if (power > 1 && len && name[len - 1] == '~')
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name_prefix_len = len - 1;
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}
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}
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while (parents) {
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if (name) {
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struct object *obj = &parents->item->object;
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if (++counter > 1)
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put_object_name(options, obj, "%s^%d",
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name, counter);
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else if (generation > 0)
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put_object_name(options, obj, "%.*s~%d",
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name_prefix_len, name, generation + 1);
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else
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put_object_name(options, obj, "%s^", name);
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}
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result = options->walk((struct object *)parents->item, OBJ_COMMIT, data, options);
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if (result < 0)
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return result;
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if (!res)
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res = result;
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parents = parents->next;
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}
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return res;
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}
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static int fsck_walk_tag(struct tag *tag, void *data, struct fsck_options *options)
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{
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char *name = get_object_name(options, &tag->object);
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if (parse_tag(tag))
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return -1;
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if (name)
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put_object_name(options, tag->tagged, "%s", name);
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return options->walk(tag->tagged, OBJ_ANY, data, options);
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}
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int fsck_walk(struct object *obj, void *data, struct fsck_options *options)
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{
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if (!obj)
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return -1;
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if (obj->type == OBJ_NONE)
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parse_object(&obj->oid);
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switch (obj->type) {
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case OBJ_BLOB:
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return 0;
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case OBJ_TREE:
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return fsck_walk_tree((struct tree *)obj, data, options);
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case OBJ_COMMIT:
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return fsck_walk_commit((struct commit *)obj, data, options);
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case OBJ_TAG:
|
|
return fsck_walk_tag((struct tag *)obj, data, options);
|
|
default:
|
|
error("Unknown object type for %s", describe_object(options, obj));
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The entries in a tree are ordered in the _path_ order,
|
|
* which means that a directory entry is ordered by adding
|
|
* a slash to the end of it.
|
|
*
|
|
* So a directory called "a" is ordered _after_ a file
|
|
* called "a.c", because "a/" sorts after "a.c".
|
|
*/
|
|
#define TREE_UNORDERED (-1)
|
|
#define TREE_HAS_DUPS (-2)
|
|
|
|
static int verify_ordered(unsigned mode1, const char *name1, unsigned mode2, const char *name2)
|
|
{
|
|
int len1 = strlen(name1);
|
|
int len2 = strlen(name2);
|
|
int len = len1 < len2 ? len1 : len2;
|
|
unsigned char c1, c2;
|
|
int cmp;
|
|
|
|
cmp = memcmp(name1, name2, len);
|
|
if (cmp < 0)
|
|
return 0;
|
|
if (cmp > 0)
|
|
return TREE_UNORDERED;
|
|
|
|
/*
|
|
* Ok, the first <len> characters are the same.
|
|
* Now we need to order the next one, but turn
|
|
* a '\0' into a '/' for a directory entry.
|
|
*/
|
|
c1 = name1[len];
|
|
c2 = name2[len];
|
|
if (!c1 && !c2)
|
|
/*
|
|
* git-write-tree used to write out a nonsense tree that has
|
|
* entries with the same name, one blob and one tree. Make
|
|
* sure we do not have duplicate entries.
|
|
*/
|
|
return TREE_HAS_DUPS;
|
|
if (!c1 && S_ISDIR(mode1))
|
|
c1 = '/';
|
|
if (!c2 && S_ISDIR(mode2))
|
|
c2 = '/';
|
|
return c1 < c2 ? 0 : TREE_UNORDERED;
|
|
}
|
|
|
|
static int fsck_tree(struct tree *item, struct fsck_options *options)
|
|
{
|
|
int retval = 0;
|
|
int has_null_sha1 = 0;
|
|
int has_full_path = 0;
|
|
int has_empty_name = 0;
|
|
int has_dot = 0;
|
|
int has_dotdot = 0;
|
|
int has_dotgit = 0;
|
|
int has_zero_pad = 0;
|
|
int has_bad_modes = 0;
|
|
int has_dup_entries = 0;
|
|
int not_properly_sorted = 0;
|
|
struct tree_desc desc;
|
|
unsigned o_mode;
|
|
const char *o_name;
|
|
|
|
if (init_tree_desc_gently(&desc, item->buffer, item->size)) {
|
|
retval += report(options, &item->object, FSCK_MSG_BAD_TREE, "cannot be parsed as a tree");
|
|
return retval;
|
|
}
|
|
|
|
o_mode = 0;
|
|
o_name = NULL;
|
|
|
|
while (desc.size) {
|
|
unsigned mode;
|
|
const char *name;
|
|
const struct object_id *oid;
|
|
|
|
oid = tree_entry_extract(&desc, &name, &mode);
|
|
|
|
has_null_sha1 |= is_null_oid(oid);
|
|
has_full_path |= !!strchr(name, '/');
|
|
has_empty_name |= !*name;
|
|
has_dot |= !strcmp(name, ".");
|
|
has_dotdot |= !strcmp(name, "..");
|
|
has_dotgit |= is_hfs_dotgit(name) || is_ntfs_dotgit(name);
|
|
has_zero_pad |= *(char *)desc.buffer == '0';
|
|
|
|
if (is_hfs_dotgitmodules(name) || is_ntfs_dotgitmodules(name))
|
|
oidset_insert(&gitmodules_found, oid);
|
|
|
|
if (update_tree_entry_gently(&desc)) {
|
|
retval += report(options, &item->object, FSCK_MSG_BAD_TREE, "cannot be parsed as a tree");
|
|
break;
|
|
}
|
|
|
|
switch (mode) {
|
|
/*
|
|
* Standard modes..
|
|
*/
|
|
case S_IFREG | 0755:
|
|
case S_IFREG | 0644:
|
|
case S_IFLNK:
|
|
case S_IFDIR:
|
|
case S_IFGITLINK:
|
|
break;
|
|
/*
|
|
* This is nonstandard, but we had a few of these
|
|
* early on when we honored the full set of mode
|
|
* bits..
|
|
*/
|
|
case S_IFREG | 0664:
|
|
if (!options->strict)
|
|
break;
|
|
/* fallthrough */
|
|
default:
|
|
has_bad_modes = 1;
|
|
}
|
|
|
|
if (o_name) {
|
|
switch (verify_ordered(o_mode, o_name, mode, name)) {
|
|
case TREE_UNORDERED:
|
|
not_properly_sorted = 1;
|
|
break;
|
|
case TREE_HAS_DUPS:
|
|
has_dup_entries = 1;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
o_mode = mode;
|
|
o_name = name;
|
|
}
|
|
|
|
if (has_null_sha1)
|
|
retval += report(options, &item->object, FSCK_MSG_NULL_SHA1, "contains entries pointing to null sha1");
|
|
if (has_full_path)
|
|
retval += report(options, &item->object, FSCK_MSG_FULL_PATHNAME, "contains full pathnames");
|
|
if (has_empty_name)
|
|
retval += report(options, &item->object, FSCK_MSG_EMPTY_NAME, "contains empty pathname");
|
|
if (has_dot)
|
|
retval += report(options, &item->object, FSCK_MSG_HAS_DOT, "contains '.'");
|
|
if (has_dotdot)
|
|
retval += report(options, &item->object, FSCK_MSG_HAS_DOTDOT, "contains '..'");
|
|
if (has_dotgit)
|
|
retval += report(options, &item->object, FSCK_MSG_HAS_DOTGIT, "contains '.git'");
|
|
if (has_zero_pad)
|
|
retval += report(options, &item->object, FSCK_MSG_ZERO_PADDED_FILEMODE, "contains zero-padded file modes");
|
|
if (has_bad_modes)
|
|
retval += report(options, &item->object, FSCK_MSG_BAD_FILEMODE, "contains bad file modes");
|
|
if (has_dup_entries)
|
|
retval += report(options, &item->object, FSCK_MSG_DUPLICATE_ENTRIES, "contains duplicate file entries");
|
|
if (not_properly_sorted)
|
|
retval += report(options, &item->object, FSCK_MSG_TREE_NOT_SORTED, "not properly sorted");
|
|
return retval;
|
|
}
|
|
|
|
static int verify_headers(const void *data, unsigned long size,
|
|
struct object *obj, struct fsck_options *options)
|
|
{
|
|
const char *buffer = (const char *)data;
|
|
unsigned long i;
|
|
|
|
for (i = 0; i < size; i++) {
|
|
switch (buffer[i]) {
|
|
case '\0':
|
|
return report(options, obj,
|
|
FSCK_MSG_NUL_IN_HEADER,
|
|
"unterminated header: NUL at offset %ld", i);
|
|
case '\n':
|
|
if (i + 1 < size && buffer[i + 1] == '\n')
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We did not find double-LF that separates the header
|
|
* and the body. Not having a body is not a crime but
|
|
* we do want to see the terminating LF for the last header
|
|
* line.
|
|
*/
|
|
if (size && buffer[size - 1] == '\n')
|
|
return 0;
|
|
|
|
return report(options, obj,
|
|
FSCK_MSG_UNTERMINATED_HEADER, "unterminated header");
|
|
}
|
|
|
|
static int fsck_ident(const char **ident, struct object *obj, struct fsck_options *options)
|
|
{
|
|
const char *p = *ident;
|
|
char *end;
|
|
|
|
*ident = strchrnul(*ident, '\n');
|
|
if (**ident == '\n')
|
|
(*ident)++;
|
|
|
|
if (*p == '<')
|
|
return report(options, obj, FSCK_MSG_MISSING_NAME_BEFORE_EMAIL, "invalid author/committer line - missing space before email");
|
|
p += strcspn(p, "<>\n");
|
|
if (*p == '>')
|
|
return report(options, obj, FSCK_MSG_BAD_NAME, "invalid author/committer line - bad name");
|
|
if (*p != '<')
|
|
return report(options, obj, FSCK_MSG_MISSING_EMAIL, "invalid author/committer line - missing email");
|
|
if (p[-1] != ' ')
|
|
return report(options, obj, FSCK_MSG_MISSING_SPACE_BEFORE_EMAIL, "invalid author/committer line - missing space before email");
|
|
p++;
|
|
p += strcspn(p, "<>\n");
|
|
if (*p != '>')
|
|
return report(options, obj, FSCK_MSG_BAD_EMAIL, "invalid author/committer line - bad email");
|
|
p++;
|
|
if (*p != ' ')
|
|
return report(options, obj, FSCK_MSG_MISSING_SPACE_BEFORE_DATE, "invalid author/committer line - missing space before date");
|
|
p++;
|
|
if (*p == '0' && p[1] != ' ')
|
|
return report(options, obj, FSCK_MSG_ZERO_PADDED_DATE, "invalid author/committer line - zero-padded date");
|
|
if (date_overflows(parse_timestamp(p, &end, 10)))
|
|
return report(options, obj, FSCK_MSG_BAD_DATE_OVERFLOW, "invalid author/committer line - date causes integer overflow");
|
|
if ((end == p || *end != ' '))
|
|
return report(options, obj, FSCK_MSG_BAD_DATE, "invalid author/committer line - bad date");
|
|
p = end + 1;
|
|
if ((*p != '+' && *p != '-') ||
|
|
!isdigit(p[1]) ||
|
|
!isdigit(p[2]) ||
|
|
!isdigit(p[3]) ||
|
|
!isdigit(p[4]) ||
|
|
(p[5] != '\n'))
|
|
return report(options, obj, FSCK_MSG_BAD_TIMEZONE, "invalid author/committer line - bad time zone");
|
|
p += 6;
|
|
return 0;
|
|
}
|
|
|
|
static int fsck_commit_buffer(struct commit *commit, const char *buffer,
|
|
unsigned long size, struct fsck_options *options)
|
|
{
|
|
unsigned char tree_sha1[20], sha1[20];
|
|
struct commit_graft *graft;
|
|
unsigned parent_count, parent_line_count = 0, author_count;
|
|
int err;
|
|
const char *buffer_begin = buffer;
|
|
|
|
if (verify_headers(buffer, size, &commit->object, options))
|
|
return -1;
|
|
|
|
if (!skip_prefix(buffer, "tree ", &buffer))
|
|
return report(options, &commit->object, FSCK_MSG_MISSING_TREE, "invalid format - expected 'tree' line");
|
|
if (get_sha1_hex(buffer, tree_sha1) || buffer[40] != '\n') {
|
|
err = report(options, &commit->object, FSCK_MSG_BAD_TREE_SHA1, "invalid 'tree' line format - bad sha1");
|
|
if (err)
|
|
return err;
|
|
}
|
|
buffer += 41;
|
|
while (skip_prefix(buffer, "parent ", &buffer)) {
|
|
if (get_sha1_hex(buffer, sha1) || buffer[40] != '\n') {
|
|
err = report(options, &commit->object, FSCK_MSG_BAD_PARENT_SHA1, "invalid 'parent' line format - bad sha1");
|
|
if (err)
|
|
return err;
|
|
}
|
|
buffer += 41;
|
|
parent_line_count++;
|
|
}
|
|
graft = lookup_commit_graft(&commit->object.oid);
|
|
parent_count = commit_list_count(commit->parents);
|
|
if (graft) {
|
|
if (graft->nr_parent == -1 && !parent_count)
|
|
; /* shallow commit */
|
|
else if (graft->nr_parent != parent_count) {
|
|
err = report(options, &commit->object, FSCK_MSG_MISSING_GRAFT, "graft objects missing");
|
|
if (err)
|
|
return err;
|
|
}
|
|
} else {
|
|
if (parent_count != parent_line_count) {
|
|
err = report(options, &commit->object, FSCK_MSG_MISSING_PARENT, "parent objects missing");
|
|
if (err)
|
|
return err;
|
|
}
|
|
}
|
|
author_count = 0;
|
|
while (skip_prefix(buffer, "author ", &buffer)) {
|
|
author_count++;
|
|
err = fsck_ident(&buffer, &commit->object, options);
|
|
if (err)
|
|
return err;
|
|
}
|
|
if (author_count < 1)
|
|
err = report(options, &commit->object, FSCK_MSG_MISSING_AUTHOR, "invalid format - expected 'author' line");
|
|
else if (author_count > 1)
|
|
err = report(options, &commit->object, FSCK_MSG_MULTIPLE_AUTHORS, "invalid format - multiple 'author' lines");
|
|
if (err)
|
|
return err;
|
|
if (!skip_prefix(buffer, "committer ", &buffer))
|
|
return report(options, &commit->object, FSCK_MSG_MISSING_COMMITTER, "invalid format - expected 'committer' line");
|
|
err = fsck_ident(&buffer, &commit->object, options);
|
|
if (err)
|
|
return err;
|
|
if (!commit->tree) {
|
|
err = report(options, &commit->object, FSCK_MSG_BAD_TREE, "could not load commit's tree %s", sha1_to_hex(tree_sha1));
|
|
if (err)
|
|
return err;
|
|
}
|
|
if (memchr(buffer_begin, '\0', size)) {
|
|
err = report(options, &commit->object, FSCK_MSG_NUL_IN_COMMIT,
|
|
"NUL byte in the commit object body");
|
|
if (err)
|
|
return err;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int fsck_commit(struct commit *commit, const char *data,
|
|
unsigned long size, struct fsck_options *options)
|
|
{
|
|
const char *buffer = data ? data : get_commit_buffer(commit, &size);
|
|
int ret = fsck_commit_buffer(commit, buffer, size, options);
|
|
if (!data)
|
|
unuse_commit_buffer(commit, buffer);
|
|
return ret;
|
|
}
|
|
|
|
static int fsck_tag_buffer(struct tag *tag, const char *data,
|
|
unsigned long size, struct fsck_options *options)
|
|
{
|
|
unsigned char sha1[20];
|
|
int ret = 0;
|
|
const char *buffer;
|
|
char *to_free = NULL, *eol;
|
|
struct strbuf sb = STRBUF_INIT;
|
|
|
|
if (data)
|
|
buffer = data;
|
|
else {
|
|
enum object_type type;
|
|
|
|
buffer = to_free =
|
|
read_sha1_file(tag->object.oid.hash, &type, &size);
|
|
if (!buffer)
|
|
return report(options, &tag->object,
|
|
FSCK_MSG_MISSING_TAG_OBJECT,
|
|
"cannot read tag object");
|
|
|
|
if (type != OBJ_TAG) {
|
|
ret = report(options, &tag->object,
|
|
FSCK_MSG_TAG_OBJECT_NOT_TAG,
|
|
"expected tag got %s",
|
|
type_name(type));
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
ret = verify_headers(buffer, size, &tag->object, options);
|
|
if (ret)
|
|
goto done;
|
|
|
|
if (!skip_prefix(buffer, "object ", &buffer)) {
|
|
ret = report(options, &tag->object, FSCK_MSG_MISSING_OBJECT, "invalid format - expected 'object' line");
|
|
goto done;
|
|
}
|
|
if (get_sha1_hex(buffer, sha1) || buffer[40] != '\n') {
|
|
ret = report(options, &tag->object, FSCK_MSG_BAD_OBJECT_SHA1, "invalid 'object' line format - bad sha1");
|
|
if (ret)
|
|
goto done;
|
|
}
|
|
buffer += 41;
|
|
|
|
if (!skip_prefix(buffer, "type ", &buffer)) {
|
|
ret = report(options, &tag->object, FSCK_MSG_MISSING_TYPE_ENTRY, "invalid format - expected 'type' line");
|
|
goto done;
|
|
}
|
|
eol = strchr(buffer, '\n');
|
|
if (!eol) {
|
|
ret = report(options, &tag->object, FSCK_MSG_MISSING_TYPE, "invalid format - unexpected end after 'type' line");
|
|
goto done;
|
|
}
|
|
if (type_from_string_gently(buffer, eol - buffer, 1) < 0)
|
|
ret = report(options, &tag->object, FSCK_MSG_BAD_TYPE, "invalid 'type' value");
|
|
if (ret)
|
|
goto done;
|
|
buffer = eol + 1;
|
|
|
|
if (!skip_prefix(buffer, "tag ", &buffer)) {
|
|
ret = report(options, &tag->object, FSCK_MSG_MISSING_TAG_ENTRY, "invalid format - expected 'tag' line");
|
|
goto done;
|
|
}
|
|
eol = strchr(buffer, '\n');
|
|
if (!eol) {
|
|
ret = report(options, &tag->object, FSCK_MSG_MISSING_TAG, "invalid format - unexpected end after 'type' line");
|
|
goto done;
|
|
}
|
|
strbuf_addf(&sb, "refs/tags/%.*s", (int)(eol - buffer), buffer);
|
|
if (check_refname_format(sb.buf, 0)) {
|
|
ret = report(options, &tag->object, FSCK_MSG_BAD_TAG_NAME,
|
|
"invalid 'tag' name: %.*s",
|
|
(int)(eol - buffer), buffer);
|
|
if (ret)
|
|
goto done;
|
|
}
|
|
buffer = eol + 1;
|
|
|
|
if (!skip_prefix(buffer, "tagger ", &buffer)) {
|
|
/* early tags do not contain 'tagger' lines; warn only */
|
|
ret = report(options, &tag->object, FSCK_MSG_MISSING_TAGGER_ENTRY, "invalid format - expected 'tagger' line");
|
|
if (ret)
|
|
goto done;
|
|
}
|
|
else
|
|
ret = fsck_ident(&buffer, &tag->object, options);
|
|
|
|
done:
|
|
strbuf_release(&sb);
|
|
free(to_free);
|
|
return ret;
|
|
}
|
|
|
|
static int fsck_tag(struct tag *tag, const char *data,
|
|
unsigned long size, struct fsck_options *options)
|
|
{
|
|
struct object *tagged = tag->tagged;
|
|
|
|
if (!tagged)
|
|
return report(options, &tag->object, FSCK_MSG_BAD_TAG_OBJECT, "could not load tagged object");
|
|
|
|
return fsck_tag_buffer(tag, data, size, options);
|
|
}
|
|
|
|
static int fsck_blob(struct blob *blob, const char *buf,
|
|
unsigned long size, struct fsck_options *options)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int fsck_object(struct object *obj, void *data, unsigned long size,
|
|
struct fsck_options *options)
|
|
{
|
|
if (!obj)
|
|
return report(options, obj, FSCK_MSG_BAD_OBJECT_SHA1, "no valid object to fsck");
|
|
|
|
if (obj->type == OBJ_BLOB)
|
|
return fsck_blob((struct blob *)obj, data, size, options);
|
|
if (obj->type == OBJ_TREE)
|
|
return fsck_tree((struct tree *) obj, options);
|
|
if (obj->type == OBJ_COMMIT)
|
|
return fsck_commit((struct commit *) obj, (const char *) data,
|
|
size, options);
|
|
if (obj->type == OBJ_TAG)
|
|
return fsck_tag((struct tag *) obj, (const char *) data,
|
|
size, options);
|
|
|
|
return report(options, obj, FSCK_MSG_UNKNOWN_TYPE, "unknown type '%d' (internal fsck error)",
|
|
obj->type);
|
|
}
|
|
|
|
int fsck_error_function(struct fsck_options *o,
|
|
struct object *obj, int msg_type, const char *message)
|
|
{
|
|
if (msg_type == FSCK_WARN) {
|
|
warning("object %s: %s", describe_object(o, obj), message);
|
|
return 0;
|
|
}
|
|
error("object %s: %s", describe_object(o, obj), message);
|
|
return 1;
|
|
}
|
|
|
|
int fsck_finish(struct fsck_options *options)
|
|
{
|
|
int ret = 0;
|
|
struct oidset_iter iter;
|
|
const struct object_id *oid;
|
|
|
|
oidset_iter_init(&gitmodules_found, &iter);
|
|
while ((oid = oidset_iter_next(&iter))) {
|
|
struct blob *blob;
|
|
enum object_type type;
|
|
unsigned long size;
|
|
char *buf;
|
|
|
|
if (oidset_contains(&gitmodules_done, oid))
|
|
continue;
|
|
|
|
blob = lookup_blob(oid);
|
|
if (!blob) {
|
|
ret |= report(options, &blob->object,
|
|
FSCK_MSG_GITMODULES_BLOB,
|
|
"non-blob found at .gitmodules");
|
|
continue;
|
|
}
|
|
|
|
buf = read_sha1_file(oid->hash, &type, &size);
|
|
if (!buf) {
|
|
ret |= report(options, &blob->object,
|
|
FSCK_MSG_GITMODULES_MISSING,
|
|
"unable to read .gitmodules blob");
|
|
continue;
|
|
}
|
|
|
|
if (type == OBJ_BLOB)
|
|
ret |= fsck_blob(blob, buf, size, options);
|
|
else
|
|
ret |= report(options, &blob->object,
|
|
FSCK_MSG_GITMODULES_BLOB,
|
|
"non-blob found at .gitmodules");
|
|
free(buf);
|
|
}
|
|
|
|
|
|
oidset_clear(&gitmodules_found);
|
|
oidset_clear(&gitmodules_done);
|
|
return ret;
|
|
}
|