2 #include "run-command.h"
5 static inline void close_pair(int fd
[2])
11 static inline void dup_devnull(int to
)
13 int fd
= open("/dev/null", O_RDWR
);
18 int start_command(struct child_process
*cmd
)
20 int need_in
, need_out
;
21 int fdin
[2], fdout
[2];
23 need_in
= !cmd
->no_stdin
&& cmd
->in
< 0;
26 return -ERR_RUN_COMMAND_PIPE
;
31 need_out
= !cmd
->no_stdout
32 && !cmd
->stdout_to_stderr
35 if (pipe(fdout
) < 0) {
38 return -ERR_RUN_COMMAND_PIPE
;
50 return -ERR_RUN_COMMAND_FORK
;
66 else if (cmd
->stdout_to_stderr
)
71 } else if (cmd
->out
> 1) {
76 if (cmd
->dir
&& chdir(cmd
->dir
))
77 die("exec %s: cd to %s failed (%s)", cmd
->argv
[0],
78 cmd
->dir
, strerror(errno
));
80 for (; *cmd
->env
; cmd
->env
++)
81 putenv((char*)*cmd
->env
);
84 execv_git_cmd(cmd
->argv
);
86 execvp(cmd
->argv
[0], (char *const*) cmd
->argv
);
88 die("exec %s failed.", cmd
->argv
[0]);
98 else if (cmd
->out
> 1)
104 int finish_command(struct child_process
*cmd
)
113 pid_t waiting
= waitpid(cmd
->pid
, &status
, 0);
118 error("waitpid failed (%s)", strerror(errno
));
119 return -ERR_RUN_COMMAND_WAITPID
;
121 if (waiting
!= cmd
->pid
)
122 return -ERR_RUN_COMMAND_WAITPID_WRONG_PID
;
123 if (WIFSIGNALED(status
))
124 return -ERR_RUN_COMMAND_WAITPID_SIGNAL
;
126 if (!WIFEXITED(status
))
127 return -ERR_RUN_COMMAND_WAITPID_NOEXIT
;
128 code
= WEXITSTATUS(status
);
135 int run_command(struct child_process
*cmd
)
137 int code
= start_command(cmd
);
140 return finish_command(cmd
);
143 static void prepare_run_command_v_opt(struct child_process
*cmd
,
147 memset(cmd
, 0, sizeof(*cmd
));
149 cmd
->no_stdin
= opt
& RUN_COMMAND_NO_STDIN
? 1 : 0;
150 cmd
->git_cmd
= opt
& RUN_GIT_CMD
? 1 : 0;
151 cmd
->stdout_to_stderr
= opt
& RUN_COMMAND_STDOUT_TO_STDERR
? 1 : 0;
154 int run_command_v_opt(const char **argv
, int opt
)
156 struct child_process cmd
;
157 prepare_run_command_v_opt(&cmd
, argv
, opt
);
158 return run_command(&cmd
);
161 int run_command_v_opt_cd(const char **argv
, int opt
, const char *dir
)
163 struct child_process cmd
;
164 prepare_run_command_v_opt(&cmd
, argv
, opt
);
166 return run_command(&cmd
);
169 int run_command_v_opt_cd_env(const char **argv
, int opt
, const char *dir
, const char *const *env
)
171 struct child_process cmd
;
172 prepare_run_command_v_opt(&cmd
, argv
, opt
);
175 return run_command(&cmd
);