git-tar-tree: Move code for git-archive --format=tar to archive-tar.c

diff --git a/connect.c b/connect.c
index 4422a0d8d38c225c6c4716ce8ff826bc1acbd981..c55a20a4aa31e7cf1bbf0dcec6b4ebccb655d850 100644 (file)
--- a/connect.c
+++ b/connect.c
@@ -10,14 +10,14 @@
 #include <netdb.h>
 #include <signal.h>
 
-static char *server_capabilities = NULL;
+static char *server_capabilities;
 
 static int check_ref(const char *name, int len, unsigned int flags)
 {
        if (!flags)
                return 1;
 
-       if (len > 45 || memcmp(name, "refs/", 5))
+       if (len < 5 || memcmp(name, "refs/", 5))
                return 0;
 
        /* Skip the "refs/" part */
@@ -69,7 +69,7 @@ struct ref **get_remote_heads(int in, struct ref **list,
                if (len != name_len + 41) {
                        if (server_capabilities)
                                free(server_capabilities);
-                       server_capabilities = strdup(name + name_len + 1);
+                       server_capabilities = xstrdup(name + name_len + 1);
                }
 
                if (!check_ref(name, name_len, flags))
@@ -77,7 +77,7 @@ struct ref **get_remote_heads(int in, struct ref **list,
                if (nr_match && !path_match(name, nr_match, match))
                        continue;
                ref = xcalloc(1, sizeof(*ref) + len - 40);
-               memcpy(ref->old_sha1, old_sha1, 20);
+               hashcpy(ref->old_sha1, old_sha1);
                memcpy(ref->name, buffer + 41, len - 40);
                *list = ref;
                list = &ref->next;
@@ -208,7 +208,7 @@ static struct ref *try_explicit_object_name(const char *name)
        len = strlen(name) + 1;
        ref = xcalloc(1, sizeof(*ref) + len);
        memcpy(ref->name, name, len);
-       memcpy(ref->new_sha1, sha1, 20);
+       hashcpy(ref->new_sha1, sha1);
        return ref;
 }
 
@@ -318,7 +318,7 @@ int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
                        int len = strlen(src->name) + 1;
                        dst_peer = xcalloc(1, sizeof(*dst_peer) + len);
                        memcpy(dst_peer->name, src->name, len);
-                       memcpy(dst_peer->new_sha1, src->new_sha1, 20);
+                       hashcpy(dst_peer->new_sha1, src->new_sha1);
                        link_dst_tail(dst_peer, dst_tail);
                }
                dst_peer->peer_ref = src;
@@ -493,8 +493,8 @@ static void git_tcp_connect(int fd[2], char *host)
 }
 
 
-static char *git_proxy_command = NULL;
-static const char *rhost_name = NULL;
+static char *git_proxy_command;
+static const char *rhost_name;
 static int rhost_len;
 
 static int git_proxy_command_options(const char *var, const char *value)
@@ -599,12 +599,19 @@ static void git_proxy_connect(int fd[2], char *host)
        close(pipefd[1][0]);
 }
 
+#define MAX_CMD_LEN 1024
+
 /*
- * Yeah, yeah, fixme. Need to pass in the heads etc.
+ * This returns 0 if the transport protocol does not need fork(2),
+ * or a process id if it does.  Once done, finish the connection
+ * with finish_connect() with the value returned from this function
+ * (it is safe to call finish_connect() with 0 to support the former
+ * case).
+ *
+ * Does not return a negative value on error; it just dies.
  */
-int git_connect(int fd[2], char *url, const char *prog)
+pid_t git_connect(int fd[2], char *url, const char *prog)
 {
-       char command[1024];
        char *host, *path = url;
        char *end;
        int c;
@@ -661,7 +668,7 @@ int git_connect(int fd[2], char *url, const char *prog)
                if (path[1] == '~')
                        path++;
                else {
-                       path = strdup(ptr);
+                       path = xstrdup(ptr);
                        free_path = 1;
                }
 
@@ -672,7 +679,7 @@ int git_connect(int fd[2], char *url, const char *prog)
                /* These underlying connection commands die() if they
                 * cannot connect.
                 */
-               char *target_host = strdup(host);
+               char *target_host = xstrdup(host);
                if (git_use_proxy(host))
                        git_proxy_connect(fd, host);
                else
@@ -697,8 +704,18 @@ int git_connect(int fd[2], char *url, const char *prog)
        if (pid < 0)
                die("unable to fork");
        if (!pid) {
-               snprintf(command, sizeof(command), "%s %s", prog,
-                        sq_quote(path));
+               char command[MAX_CMD_LEN];
+               char *posn = command;
+               int size = MAX_CMD_LEN;
+               int of = 0;
+
+               of |= add_to_string(&posn, &size, prog, 0);
+               of |= add_to_string(&posn, &size, " ", 0);
+               of |= add_to_string(&posn, &size, path, 1);
+
+               if (of)
+                       die("command line too long");
+
                dup2(pipefd[1][0], 0);
                dup2(pipefd[0][1], 1);
                close(pipefd[0][0]);
@@ -737,14 +754,12 @@ int git_connect(int fd[2], char *url, const char *prog)
 
 int finish_connect(pid_t pid)
 {
-       int ret;
+       if (pid == 0)
+               return 0;
 
-       for (;;) {
-               ret = waitpid(pid, NULL, 0);
-               if (!ret)
-                       break;
+       while (waitpid(pid, NULL, 0) < 0) {
                if (errno != EINTR)
-                       break;
+                       return -1;
        }
-       return ret;
+       return 0;
 }