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authorJohannes Sixt <johannes.sixt@telecom.at>2007-10-19 19:47:54 (GMT)
committerShawn O. Pearce <spearce@spearce.org>2007-10-21 05:30:39 (GMT)
commitf364cb88238bbb468b0e076c53a055bcb8603b60 (patch)
treee9433eaa03069e10e859476afea2b4ceda21b767 /connect.c
parent98158e9cfd2808613f305bf587ce697762c884bb (diff)
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Use start_command() in git_connect() instead of explicit fork/exec.
The child process handling is delegated to start_command() and finish_command(). Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Diffstat (limited to 'connect.c')
-rw-r--r--connect.c103
1 files changed, 48 insertions, 55 deletions
diff --git a/connect.c b/connect.c
index a6d7b13..44e423d 100644
--- a/connect.c
+++ b/connect.c
@@ -482,11 +482,12 @@ struct child_process *git_connect(int fd[2], char *url,
char *host, *path = url;
char *end;
int c;
- int pipefd[2][2];
struct child_process *conn;
enum protocol protocol = PROTO_LOCAL;
int free_path = 0;
char *port = NULL;
+ const char **arg;
+ struct strbuf cmd;
/* Without this we cannot rely on waitpid() to tell
* what happened to our children.
@@ -572,59 +573,52 @@ struct child_process *git_connect(int fd[2], char *url,
return NULL;
}
- if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
- die("unable to create pipe pair for communication");
conn = xcalloc(1, sizeof(*conn));
- conn->pid = fork();
- if (conn->pid < 0)
- die("unable to fork");
- if (!conn->pid) {
- struct strbuf cmd;
-
- strbuf_init(&cmd, MAX_CMD_LEN);
- strbuf_addstr(&cmd, prog);
- strbuf_addch(&cmd, ' ');
- sq_quote_buf(&cmd, path);
- if (cmd.len >= MAX_CMD_LEN)
- die("command line too long");
-
- dup2(pipefd[1][0], 0);
- dup2(pipefd[0][1], 1);
- close(pipefd[0][0]);
- close(pipefd[0][1]);
- close(pipefd[1][0]);
- close(pipefd[1][1]);
- if (protocol == PROTO_SSH) {
- const char *ssh, *ssh_basename;
- ssh = getenv("GIT_SSH");
- if (!ssh) ssh = "ssh";
- ssh_basename = strrchr(ssh, '/');
- if (!ssh_basename)
- ssh_basename = ssh;
- else
- ssh_basename++;
- if (!port)
- execlp(ssh, ssh_basename, host, cmd.buf, NULL);
- else
- execlp(ssh, ssh_basename, "-p", port, host,
- cmd.buf, NULL);
+ strbuf_init(&cmd, MAX_CMD_LEN);
+ strbuf_addstr(&cmd, prog);
+ strbuf_addch(&cmd, ' ');
+ sq_quote_buf(&cmd, path);
+ if (cmd.len >= MAX_CMD_LEN)
+ die("command line too long");
+
+ conn->in = conn->out = -1;
+ conn->argv = arg = xcalloc(6, sizeof(*arg));
+ if (protocol == PROTO_SSH) {
+ const char *ssh = getenv("GIT_SSH");
+ if (!ssh) ssh = "ssh";
+
+ *arg++ = ssh;
+ if (port) {
+ *arg++ = "-p";
+ *arg++ = port;
}
- else {
- unsetenv(ALTERNATE_DB_ENVIRONMENT);
- unsetenv(DB_ENVIRONMENT);
- unsetenv(GIT_DIR_ENVIRONMENT);
- unsetenv(GIT_WORK_TREE_ENVIRONMENT);
- unsetenv(GRAFT_ENVIRONMENT);
- unsetenv(INDEX_ENVIRONMENT);
- execlp("sh", "sh", "-c", cmd.buf, NULL);
- }
- die("exec failed");
+ *arg++ = host;
+ }
+ else {
+ /* remove these from the environment */
+ const char *env[] = {
+ ALTERNATE_DB_ENVIRONMENT,
+ DB_ENVIRONMENT,
+ GIT_DIR_ENVIRONMENT,
+ GIT_WORK_TREE_ENVIRONMENT,
+ GRAFT_ENVIRONMENT,
+ INDEX_ENVIRONMENT,
+ NULL
+ };
+ conn->env = env;
+ *arg++ = "sh";
+ *arg++ = "-c";
}
- fd[0] = pipefd[0][0];
- fd[1] = pipefd[1][1];
- close(pipefd[0][1]);
- close(pipefd[1][0]);
+ *arg++ = cmd.buf;
+ *arg = NULL;
+
+ if (start_command(conn))
+ die("unable to fork");
+
+ fd[0] = conn->out; /* read from child's stdout */
+ fd[1] = conn->in; /* write to child's stdin */
+ strbuf_release(&cmd);
if (free_path)
free(path);
return conn;
@@ -632,13 +626,12 @@ struct child_process *git_connect(int fd[2], char *url,
int finish_connect(struct child_process *conn)
{
+ int code;
if (!conn)
return 0;
- while (waitpid(conn->pid, NULL, 0) < 0) {
- if (errno != EINTR)
- return -1;
- }
+ code = finish_command(conn);
+ free(conn->argv);
free(conn);
- return 0;
+ return code;
}