checkout: automerge local changes while switching branches.

diff --git a/sha1_file.c b/sha1_file.c
index fa22e9c71a0360ad5c3a865e0d6b3b49ba97e064..8bebbb255f762fc36f165b87023d8cc37732968a 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -48,6 +48,29 @@ 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;
@@ -59,11 +82,16 @@ int safe_create_leading_directories(char *path)
                if (!pos)
                        break;
                *pos = 0;
-               if (mkdir(path, 0777) < 0)
+               if (mkdir(path, 0777) < 0) {
                        if (errno != EEXIST) {
                                *pos = '/';
                                return -1;
                        }
+               }
+               else if (adjust_shared_perm(path)) {
+                       *pos = '/';
+                       return -2;
+               }
                *pos++ = '/';
        }
        return 0;
@@ -81,6 +109,8 @@ char * sha1_to_hex(const unsigned char *sha1)
                *buf++ = hex[val >> 4];
                *buf++ = hex[val & 0xf];
        }
+       *buf = '\0';
+
        return buffer;
 }
 
@@ -319,12 +349,16 @@ struct packed_git *packed_git;
 static int check_packed_git_idx(const char *path, unsigned long *idx_size_,
                                void **idx_map_)
 {
+       SHA_CTX ctx;
+       unsigned char sha1[20];
        void *idx_map;
        unsigned int *index;
        unsigned long idx_size;
        int nr, i;
-       int fd = open(path, O_RDONLY);
+       int fd;
        struct stat st;
+
+       fd = open(path, O_RDONLY);
        if (fd < 0)
                return -1;
        if (fstat(fd, &st)) {
@@ -362,6 +396,16 @@ static int check_packed_git_idx(const char *path, unsigned long *idx_size_,
        if (idx_size != 4*256 + nr * 24 + 20 + 20)
                return error("wrong index file size");
 
+       /*
+        * File checksum.
+        */
+       SHA1_Init(&ctx);
+       SHA1_Update(&ctx, idx_map, idx_size-20);
+       SHA1_Final(sha1, &ctx);
+
+       if (memcmp(sha1, idx_map + idx_size - 20, 20))
+               return error("index checksum mismatch");
+
        return 0;
 }
 
@@ -464,7 +508,7 @@ struct packed_git *add_packed_git(char *path, int path_len, int local)
        p->pack_last_used = 0;
        p->pack_use_cnt = 0;
        p->pack_local = local;
-       if (!get_sha1_hex(path + path_len - 40 - 4, sha1))
+       if ((path_len > 44) && !get_sha1_hex(path + path_len - 44, sha1))
                memcpy(p->sha1, sha1, 20);
        return p;
 }
@@ -1239,6 +1283,8 @@ 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;
@@ -1274,7 +1320,7 @@ int move_temp_to_file(const char *tmpfile, char *filename)
        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 ? */
@@ -1313,7 +1359,7 @@ 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;
        }
 
@@ -1321,7 +1367,7 @@ 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;
        }
 
@@ -1410,7 +1456,7 @@ 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 ");
                        }