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1843b4e0 JP |
1 | #ifndef __SUBCMD_RUN_COMMAND_H |
2 | #define __SUBCMD_RUN_COMMAND_H | |
07800601 | 3 | |
2f4ce5ec JP |
4 | #include <unistd.h> |
5 | ||
07800601 IM |
6 | enum { |
7 | ERR_RUN_COMMAND_FORK = 10000, | |
8 | ERR_RUN_COMMAND_EXEC, | |
9 | ERR_RUN_COMMAND_PIPE, | |
10 | ERR_RUN_COMMAND_WAITPID, | |
11 | ERR_RUN_COMMAND_WAITPID_WRONG_PID, | |
12 | ERR_RUN_COMMAND_WAITPID_SIGNAL, | |
13 | ERR_RUN_COMMAND_WAITPID_NOEXIT, | |
14 | }; | |
15 | #define IS_RUN_COMMAND_ERR(x) (-(x) >= ERR_RUN_COMMAND_FORK) | |
16 | ||
17 | struct child_process { | |
18 | const char **argv; | |
19 | pid_t pid; | |
20 | /* | |
21 | * Using .in, .out, .err: | |
22 | * - Specify 0 for no redirections (child inherits stdin, stdout, | |
23 | * stderr from parent). | |
24 | * - Specify -1 to have a pipe allocated as follows: | |
25 | * .in: returns the writable pipe end; parent writes to it, | |
26 | * the readable pipe end becomes child's stdin | |
27 | * .out, .err: returns the readable pipe end; parent reads from | |
28 | * it, the writable pipe end becomes child's stdout/stderr | |
29 | * The caller of start_command() must close the returned FDs | |
30 | * after it has completed reading from/writing to it! | |
31 | * - Specify > 0 to set a channel to a particular FD as follows: | |
32 | * .in: a readable FD, becomes child's stdin | |
33 | * .out: a writable FD, becomes child's stdout/stderr | |
34 | * .err > 0 not supported | |
35 | * The specified FD is closed by start_command(), even in case | |
36 | * of errors! | |
37 | */ | |
38 | int in; | |
39 | int out; | |
40 | int err; | |
41 | const char *dir; | |
42 | const char *const *env; | |
43 | unsigned no_stdin:1; | |
44 | unsigned no_stdout:1; | |
45 | unsigned no_stderr:1; | |
46113a54 | 46 | unsigned exec_cmd:1; /* if this is to be external sub-command */ |
07800601 IM |
47 | unsigned stdout_to_stderr:1; |
48 | void (*preexec_cb)(void); | |
49 | }; | |
50 | ||
51 | int start_command(struct child_process *); | |
52 | int finish_command(struct child_process *); | |
53 | int run_command(struct child_process *); | |
54 | ||
07800601 | 55 | #define RUN_COMMAND_NO_STDIN 1 |
46113a54 | 56 | #define RUN_EXEC_CMD 2 /*If this is to be external sub-command */ |
07800601 IM |
57 | #define RUN_COMMAND_STDOUT_TO_STDERR 4 |
58 | int run_command_v_opt(const char **argv, int opt); | |
59 | ||
1843b4e0 | 60 | #endif /* __SUBCMD_RUN_COMMAND_H */ |