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Add run_command_v_opt_cd: chdir into a directory before exec

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It can make code simplier (no need to preserve cwd) and safer
(no chance the cwd of the current process is accidentally forgotten).

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Alex Riesen 2007-05-22 23:48:23 +02:00 committed by Junio C Hamano
parent 98ee8187e4
commit 1568fea01e
2 changed files with 24 additions and 5 deletions
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27
run-command.c
View File

@ -73,6 +73,9 @@ int start_command(struct child_process *cmd)
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->git_cmd) {
execv_git_cmd(cmd->argv);
} else {
@ -133,13 +136,27 @@ 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);
}

2
run-command.h
View File

@ -16,6 +16,7 @@ struct child_process {
pid_t pid;
int in;
int out;
const char *dir;
unsigned close_in:1;
unsigned close_out:1;
unsigned no_stdin:1;
@ -32,5 +33,6 @@ int run_command(struct child_process *);
#define RUN_GIT_CMD 2 /*If this is to be git sub-command */
#define RUN_COMMAND_STDOUT_TO_STDERR 4
int run_command_v_opt(const char **argv, int opt);
int run_command_v_opt_cd(const char **argv, int opt, const char *dir);
#endif