X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=run-command.c;h=7e779d33ee9ea5f7d2e6aedc8c3a0a0476e87135;hb=ec96e0f6a4244e3bccc745eeb4cb6daa80a347e4;hp=03ff7bcac2a812bfa049255b499f25fdc14a0fd4;hpb=4919bf0354e2a1cfb948c320d45d51319ada30eb;p=git.git

diff --git a/run-command.c b/run-command.c
index 03ff7bcac..7e779d33e 100644
--- a/run-command.c
+++ b/run-command.c
@@ -2,11 +2,25 @@
 #include "run-command.h"
 #include "exec_cmd.h"
 
+static inline void close_pair(int fd[2])
+{
+	close(fd[0]);
+	close(fd[1]);
+}
+
+static inline void dup_devnull(int to)
+{
+	int fd = open("/dev/null", O_RDWR);
+	dup2(fd, to);
+	close(fd);
+}
+
 int start_command(struct child_process *cmd)
 {
-	int need_in = !cmd->no_stdin && cmd->in < 0;
-	int fdin[2];
+	int need_in, need_out;
+	int fdin[2], fdout[2];
 
+	need_in = !cmd->no_stdin && cmd->in < 0;
 	if (need_in) {
 		if (pipe(fdin) < 0)
 			return -ERR_RUN_COMMAND_PIPE;
@@ -14,31 +28,62 @@ int start_command(struct child_process *cmd)
 		cmd->close_in = 1;
 	}
 
+	need_out = !cmd->no_stdout
+		&& !cmd->stdout_to_stderr
+		&& cmd->out < 0;
+	if (need_out) {
+		if (pipe(fdout) < 0) {
+			if (need_in)
+				close_pair(fdin);
+			return -ERR_RUN_COMMAND_PIPE;
+		}
+		cmd->out = fdout[0];
+		cmd->close_out = 1;
+	}
+
 	cmd->pid = fork();
 	if (cmd->pid < 0) {
-		if (need_in) {
-			close(fdin[0]);
-			close(fdin[1]);
-		}
+		if (need_in)
+			close_pair(fdin);
+		if (need_out)
+			close_pair(fdout);
 		return -ERR_RUN_COMMAND_FORK;
 	}
 
 	if (!cmd->pid) {
-		if (cmd->no_stdin) {
-			int fd = open("/dev/null", O_RDWR);
-			dup2(fd, 0);
-			close(fd);
-		} else if (need_in) {
+		if (cmd->no_stdin)
+			dup_devnull(0);
+		else if (need_in) {
 			dup2(fdin[0], 0);
-			close(fdin[0]);
-			close(fdin[1]);
+			close_pair(fdin);
 		} else if (cmd->in) {
 			dup2(cmd->in, 0);
 			close(cmd->in);
 		}
 
-		if (cmd->stdout_to_stderr)
+		if (cmd->no_stdout)
+			dup_devnull(1);
+		else if (cmd->stdout_to_stderr)
 			dup2(2, 1);
+		else if (need_out) {
+			dup2(fdout[1], 1);
+			close_pair(fdout);
+		} else if (cmd->out > 1) {
+			dup2(cmd->out, 1);
+			close(cmd->out);
+		}
+
+		if (cmd->dir && chdir(cmd->dir))
+			die("exec %s: cd to %s failed (%s)", cmd->argv[0],
+			    cmd->dir, strerror(errno));
+		if (cmd->env) {
+			for (; *cmd->env; cmd->env++) {
+				if (strchr(*cmd->env, '='))
+					putenv((char*)*cmd->env);
+				else
+					unsetenv(*cmd->env);
+			}
+		}
 		if (cmd->git_cmd) {
 			execv_git_cmd(cmd->argv);
 		} else {
@@ -52,6 +97,11 @@ int start_command(struct child_process *cmd)
 	else if (cmd->in)
 		close(cmd->in);
 
+	if (need_out)
+		close(fdout[1]);
+	else if (cmd->out > 1)
+		close(cmd->out);
+
 	return 0;
 }
 
@@ -59,6 +109,8 @@ int finish_command(struct child_process *cmd)
 {
 	if (cmd->close_in)
 		close(cmd->in);
+	if (cmd->close_out)
+		close(cmd->out);
 
 	for (;;) {
 		int status, code;
@@ -92,13 +144,37 @@ int run_command(struct child_process *cmd)
 	return finish_command(cmd);
 }
 
+static void prepare_run_command_v_opt(struct child_process *cmd,
+				      const char **argv,
+				      int opt)
+{
+	memset(cmd, 0, sizeof(*cmd));
+	cmd->argv = argv;
+	cmd->no_stdin = opt & RUN_COMMAND_NO_STDIN ? 1 : 0;
+	cmd->git_cmd = opt & RUN_GIT_CMD ? 1 : 0;
+	cmd->stdout_to_stderr = opt & RUN_COMMAND_STDOUT_TO_STDERR ? 1 : 0;
+}
+
 int run_command_v_opt(const char **argv, int opt)
 {
 	struct child_process cmd;
-	memset(&cmd, 0, sizeof(cmd));
-	cmd.argv = argv;
-	cmd.no_stdin = opt & RUN_COMMAND_NO_STDIN ? 1 : 0;
-	cmd.git_cmd = opt & RUN_GIT_CMD ? 1 : 0;
-	cmd.stdout_to_stderr = opt & RUN_COMMAND_STDOUT_TO_STDERR ? 1 : 0;
+	prepare_run_command_v_opt(&cmd, argv, opt);
+	return run_command(&cmd);
+}
+
+int run_command_v_opt_cd(const char **argv, int opt, const char *dir)
+{
+	struct child_process cmd;
+	prepare_run_command_v_opt(&cmd, argv, opt);
+	cmd.dir = dir;
+	return run_command(&cmd);
+}
+
+int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const char *const *env)
+{
+	struct child_process cmd;
+	prepare_run_command_v_opt(&cmd, argv, opt);
+	cmd.dir = dir;
+	cmd.env = env;
 	return run_command(&cmd);
 }