git-daemon --base-path

[git.git] / sha1_file.c

diff --git a/sha1_file.c b/sha1_file.c
index d451a94..8bebbb2 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;
@@ -321,12 +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)) {
@@ -364,6 +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;
 }
 
@@ -1241,6 +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;