X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=sha1_file.c;h=64cf2454182dbf4cbf1a2ee70dea4823cf8cfaa0;hb=abb7c7b31c0896bd838bbb6437b310db5a42227a;hp=f0590049098b5371bc72855acc5736f9d5f61e2b;hpb=d06b689a933f6d2130f8afdf1ac0ddb83eeb59ab;p=git.git

diff --git a/sha1_file.c b/sha1_file.c
index f0590049..64cf2454 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -6,8 +6,6 @@
  * This handles basic git sha1 object files - packing, unpacking,
  * creation etc.
  */
-#include <sys/types.h>
-#include <dirent.h>
 #include "cache.h"
 #include "delta.h"
 #include "pack.h"
@@ -48,20 +46,57 @@ int get_sha1_hex(const char *hex, unsigned char *sha1)
 	return 0;
 }
 
+int adjust_shared_perm(const char *path)
+{
+	struct stat st;
+	int mode;
+
+	if (!shared_repository)
+		return 0;
+	if (lstat(path, &st) < 0)
+		return -1;
+	mode = st.st_mode;
+	if (mode & S_IRUSR)
+		mode |= S_IRGRP;
+	if (mode & S_IWUSR)
+		mode |= S_IWGRP;
+	if (mode & S_IXUSR)
+		mode |= S_IXGRP;
+	if (S_ISDIR(mode))
+		mode |= S_ISGID;
+	if (chmod(path, mode) < 0)
+		return -2;
+	return 0;
+}
+
 int safe_create_leading_directories(char *path)
 {
 	char *pos = path;
+	struct stat st;
+
+	if (*pos == '/')
+		pos++;
 
 	while (pos) {
 		pos = strchr(pos, '/');
 		if (!pos)
 			break;
 		*pos = 0;
-		if (mkdir(path, 0777) < 0)
-			if (errno != EEXIST) {
+		if (!stat(path, &st)) {
+			/* path exists */
+			if (!S_ISDIR(st.st_mode)) {
 				*pos = '/';
-				return -1;
+				return -3;
 			}
+		}
+		else if (mkdir(path, 0777)) {
+			*pos = '/';
+			return -1;
+		}
+		else if (adjust_shared_perm(path)) {
+			*pos = '/';
+			return -2;
+		}
 		*pos++ = '/';
 	}
 	return 0;
@@ -79,6 +114,8 @@ char * sha1_to_hex(const unsigned char *sha1)
 		*buf++ = hex[val >> 4];
 		*buf++ = hex[val & 0xf];
 	}
+	*buf = '\0';
+
 	return buffer;
 }
 
@@ -182,8 +219,8 @@ static struct alternate_object_database **alt_odb_tail;
  * alternate_object_database.  The elements on this list come from
  * non-empty elements from colon separated ALTERNATE_DB_ENVIRONMENT
  * environment variable, and $GIT_OBJECT_DIRECTORY/info/alternates,
- * whose contents is exactly in the same format as that environment
- * variable.  Its base points at a statically allocated buffer that
+ * whose contents is similar to that environment variable but can be
+ * LF separated.  Its base points at a statically allocated buffer that
  * contains "/the/directory/corresponding/to/.git/objects/...", while
  * its name points just after the slash at the end of ".git/objects/"
  * in the example above, and has enough space to hold 40-byte hex
@@ -195,6 +232,7 @@ static void link_alt_odb_entries(const char *alt, const char *ep, int sep,
 {
 	const char *cp, *last;
 	struct alternate_object_database *ent;
+	const char *objdir = get_object_directory();
 	int base_len = -1;
 
 	last = alt;
@@ -209,6 +247,7 @@ static void link_alt_odb_entries(const char *alt, const char *ep, int sep,
 		for ( ; cp < ep && *cp != sep; cp++)
 			;
 		if (last != cp) {
+			struct alternate_object_database *alt;
 			/* 43 = 40-byte + 2 '/' + terminating NUL */
 			int pfxlen = cp - last;
 			int entlen = pfxlen + 43;
@@ -221,9 +260,7 @@ static void link_alt_odb_entries(const char *alt, const char *ep, int sep,
 				pfxlen += base_len;
 			}
 			ent = xmalloc(sizeof(*ent) + entlen);
-			*alt_odb_tail = ent;
-			alt_odb_tail = &(ent->next);
-			ent->next = NULL;
+
 			if (*last != '/' && relative_base) {
 				memcpy(ent->base, relative_base, base_len - 1);
 				ent->base[base_len - 1] = '/';
@@ -235,6 +272,22 @@ static void link_alt_odb_entries(const char *alt, const char *ep, int sep,
 			ent->name = ent->base + pfxlen + 1;
 			ent->base[pfxlen] = ent->base[pfxlen + 3] = '/';
 			ent->base[entlen-1] = 0;
+
+			/* Prevent the common mistake of listing the same
+			 * thing twice, or object directory itself.
+			 */
+			for (alt = alt_odb_list; alt; alt = alt->next)
+				if (!memcmp(ent->base, alt->base, pfxlen))
+					goto bad;
+			if (!memcmp(ent->base, objdir, pfxlen)) {
+			bad:
+				free(ent);
+			}
+			else {
+				*alt_odb_tail = ent;
+				alt_odb_tail = &(ent->next);
+				ent->next = NULL;
+			}
 		}
 		while (cp < ep && *cp == sep)
 			cp++;
@@ -416,12 +469,13 @@ int use_packed_git(struct packed_git *p)
 	return 0;
 }
 
-struct packed_git *add_packed_git(char *path, int path_len)
+struct packed_git *add_packed_git(char *path, int path_len, int local)
 {
 	struct stat st;
 	struct packed_git *p;
 	unsigned long idx_size;
 	void *idx_map;
+	unsigned char sha1[20];
 
 	if (check_packed_git_idx(path, &idx_size, &idx_map))
 		return NULL;
@@ -444,6 +498,9 @@ struct packed_git *add_packed_git(char *path, int path_len)
 	p->pack_base = NULL;
 	p->pack_last_used = 0;
 	p->pack_use_cnt = 0;
+	p->pack_local = local;
+	if ((path_len > 44) && !get_sha1_hex(path + path_len - 44, sha1))
+		memcpy(p->sha1, sha1, 20);
 	return p;
 }
 
@@ -484,7 +541,7 @@ void install_packed_git(struct packed_git *pack)
 	packed_git = pack;
 }
 
-static void prepare_packed_git_one(char *objdir)
+static void prepare_packed_git_one(char *objdir, int local)
 {
 	char path[PATH_MAX];
 	int len;
@@ -506,7 +563,7 @@ static void prepare_packed_git_one(char *objdir)
 
 		/* we have .idx.  Is it a file we can map? */
 		strcpy(path + len, de->d_name);
-		p = add_packed_git(path, len + namelen);
+		p = add_packed_git(path, len + namelen, local);
 		if (!p)
 			continue;
 		p->next = packed_git;
@@ -522,11 +579,12 @@ void prepare_packed_git(void)
 
 	if (run_once)
 		return;
-	prepare_packed_git_one(get_object_directory());
+	prepare_packed_git_one(get_object_directory(), 1);
 	prepare_alt_odb();
 	for (alt = alt_odb_list; alt; alt = alt->next) {
-		alt->name[0] = 0;
-		prepare_packed_git_one(alt->base);
+		alt->name[-1] = 0;
+		prepare_packed_git_one(alt->base, 0);
+		alt->name[-1] = '/';
 	}
 	run_once = 1;
 }
@@ -772,7 +830,7 @@ void packed_object_info_detail(struct pack_entry *e,
 			       char *type,
 			       unsigned long *size,
 			       unsigned long *store_size,
-			       int *delta_chain_length,
+			       unsigned int *delta_chain_length,
 			       unsigned char *base_sha1)
 {
 	struct packed_git *p = e->p;
@@ -786,7 +844,7 @@ void packed_object_info_detail(struct pack_entry *e,
 	if (kind != OBJ_DELTA)
 		*delta_chain_length = 0;
 	else {
-		int chain_length = 0;
+		unsigned int chain_length = 0;
 		memcpy(base_sha1, pack, 20);
 		do {
 			struct pack_entry base_ent;
@@ -1216,6 +1274,8 @@ static int link_temp_to_file(const char *tmpfile, char *filename)
 		if (dir) {
 			*dir = 0;
 			mkdir(filename, 0777);
+			if (adjust_shared_perm(filename))
+				return -2;
 			*dir = '/';
 			if (!link(tmpfile, filename))
 				return 0;
@@ -1231,23 +1291,27 @@ static int link_temp_to_file(const char *tmpfile, char *filename)
 int move_temp_to_file(const char *tmpfile, char *filename)
 {
 	int ret = link_temp_to_file(tmpfile, filename);
-	if (ret) {
-		/*
-		 * Coda hack - coda doesn't like cross-directory links,
-		 * so we fall back to a rename, which will mean that it
-		 * won't be able to check collisions, but that's not a
-		 * big deal.
-		 *
-		 * When this succeeds, we just return 0. We have nothing
-		 * left to unlink.
-		 */
-		if (ret == EXDEV && !rename(tmpfile, filename))
+
+	/*
+	 * Coda hack - coda doesn't like cross-directory links,
+	 * so we fall back to a rename, which will mean that it
+	 * won't be able to check collisions, but that's not a
+	 * big deal.
+	 *
+	 * The same holds for FAT formatted media.
+	 *
+	 * When this succeeds, we just return 0. We have nothing
+	 * left to unlink.
+	 */
+	if (ret && ret != EEXIST) {
+		if (!rename(tmpfile, filename))
 			return 0;
+		ret = errno;
 	}
 	unlink(tmpfile);
 	if (ret) {
 		if (ret != EEXIST) {
-			fprintf(stderr, "unable to write sha1 filename %s: %s", filename, strerror(ret));
+			fprintf(stderr, "unable to write sha1 filename %s: %s\n", filename, strerror(ret));
 			return -1;
 		}
 		/* FIXME!!! Collision check here ? */
@@ -1286,7 +1350,7 @@ int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned cha
 	}
 
 	if (errno != ENOENT) {
-		fprintf(stderr, "sha1 file %s: %s", filename, strerror(errno));
+		fprintf(stderr, "sha1 file %s: %s\n", filename, strerror(errno));
 		return -1;
 	}
 
@@ -1294,7 +1358,7 @@ int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned cha
 
 	fd = mkstemp(tmpfile);
 	if (fd < 0) {
-		fprintf(stderr, "unable to create temporary sha1 filename %s: %s", tmpfile, strerror(errno));
+		fprintf(stderr, "unable to create temporary sha1 filename %s: %s\n", tmpfile, strerror(errno));
 		return -1;
 	}
 
@@ -1383,7 +1447,7 @@ int write_sha1_to_fd(int fd, const unsigned char *sha1)
 		size = write(fd, buf + posn, objsize - posn);
 		if (size <= 0) {
 			if (!size) {
-				fprintf(stderr, "write closed");
+				fprintf(stderr, "write closed\n");
 			} else {
 				perror("write ");
 			}
@@ -1501,6 +1565,40 @@ int has_sha1_file(const unsigned char *sha1)
 	return find_sha1_file(sha1, &st) ? 1 : 0;
 }
 
+int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object)
+{
+	unsigned long size = 4096;
+	char *buf = malloc(size);
+	int iret, ret;
+	unsigned long off = 0;
+	unsigned char hdr[50];
+	int hdrlen;
+	do {
+		iret = read(fd, buf + off, size - off);
+		if (iret > 0) {
+			off += iret;
+			if (off == size) {
+				size *= 2;
+				buf = realloc(buf, size);
+			}
+		}
+	} while (iret > 0);
+	if (iret < 0) {
+		free(buf);
+		return -1;
+	}
+	if (!type)
+		type = "blob";
+	if (write_object)
+		ret = write_sha1_file(buf, off, type, sha1);
+	else {
+		write_sha1_file_prepare(buf, off, type, sha1, hdr, &hdrlen);
+		ret = 0;
+	}
+	free(buf);
+	return ret;
+}
+
 int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, const char *type)
 {
 	unsigned long size = st->st_size;