1#ifndef __PERF_RUN_COMMAND_H
2#define __PERF_RUN_COMMAND_H
3
4enum {
5	ERR_RUN_COMMAND_FORK = 10000,
6	ERR_RUN_COMMAND_EXEC,
7	ERR_RUN_COMMAND_PIPE,
8	ERR_RUN_COMMAND_WAITPID,
9	ERR_RUN_COMMAND_WAITPID_WRONG_PID,
10	ERR_RUN_COMMAND_WAITPID_SIGNAL,
11	ERR_RUN_COMMAND_WAITPID_NOEXIT,
12};
13#define IS_RUN_COMMAND_ERR(x) (-(x) >= ERR_RUN_COMMAND_FORK)
14
15struct child_process {
16	const char **argv;
17	pid_t pid;
18	/*
19	 * Using .in, .out, .err:
20	 * - Specify 0 for no redirections (child inherits stdin, stdout,
21	 *   stderr from parent).
22	 * - Specify -1 to have a pipe allocated as follows:
23	 *     .in: returns the writable pipe end; parent writes to it,
24	 *          the readable pipe end becomes child's stdin
25	 *     .out, .err: returns the readable pipe end; parent reads from
26	 *          it, the writable pipe end becomes child's stdout/stderr
27	 *   The caller of start_command() must close the returned FDs
28	 *   after it has completed reading from/writing to it!
29	 * - Specify > 0 to set a channel to a particular FD as follows:
30	 *     .in: a readable FD, becomes child's stdin
31	 *     .out: a writable FD, becomes child's stdout/stderr
32	 *     .err > 0 not supported
33	 *   The specified FD is closed by start_command(), even in case
34	 *   of errors!
35	 */
36	int in;
37	int out;
38	int err;
39	const char *dir;
40	const char *const *env;
41	unsigned no_stdin:1;
42	unsigned no_stdout:1;
43	unsigned no_stderr:1;
44	unsigned perf_cmd:1; /* if this is to be perf sub-command */
45	unsigned stdout_to_stderr:1;
46	void (*preexec_cb)(void);
47};
48
49int start_command(struct child_process *);
50int finish_command(struct child_process *);
51int run_command(struct child_process *);
52
53#define RUN_COMMAND_NO_STDIN 1
54#define RUN_PERF_CMD	     2	/*If this is to be perf sub-command */
55#define RUN_COMMAND_STDOUT_TO_STDERR 4
56int run_command_v_opt(const char **argv, int opt);
57
58#endif /* __PERF_RUN_COMMAND_H */
59