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run-command.h
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1 #ifndef __PERF_RUN_COMMAND_H
2 #define __PERF_RUN_COMMAND_H
3 
4 enum {
12 };
13 #define IS_RUN_COMMAND_ERR(x) (-(x) >= ERR_RUN_COMMAND_FORK)
14 
15 struct child_process {
16  const char **argv;
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;
47 };
48 
49 int start_command(struct child_process *);
50 int finish_command(struct child_process *);
51 int 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
56 int run_command_v_opt(const char **argv, int opt);
57 
58 #endif /* __PERF_RUN_COMMAND_H */