12 * Using .in, .out, .err:
13 * - Specify 0 for no redirections (child inherits stdin, stdout,
14 * stderr from parent).
15 * - Specify -1 to have a pipe allocated as follows:
16 * .in: returns the writable pipe end; parent writes to it,
17 * the readable pipe end becomes child's stdin
18 * .out, .err: returns the readable pipe end; parent reads from
19 * it, the writable pipe end becomes child's stdout/stderr
20 * The caller of start_command() must close the returned FDs
21 * after it has completed reading from/writing to it!
22 * - Specify > 0 to set a channel to a particular FD as follows:
23 * .in: a readable FD, becomes child's stdin
24 * .out: a writable FD, becomes child's stdout/stderr
25 * .err: a writable FD, becomes child's stderr
26 * The specified FD is closed by start_command(), even in case
33 const char *const *env
;
37 unsigned git_cmd
:1; /* if this is to be git sub-command */
38 unsigned silent_exec_failure
:1;
39 unsigned stdout_to_stderr
:1;
41 unsigned clean_on_exit
:1;
42 void (*preexec_cb
)(void);
45 int start_command(struct child_process
*);
46 int finish_command(struct child_process
*);
47 int run_command(struct child_process
*);
49 extern int run_hook(const char *index_file
, const char *name
, ...);
51 #define RUN_COMMAND_NO_STDIN 1
52 #define RUN_GIT_CMD 2 /*If this is to be git sub-command */
53 #define RUN_COMMAND_STDOUT_TO_STDERR 4
54 #define RUN_SILENT_EXEC_FAILURE 8
55 #define RUN_USING_SHELL 16
56 int run_command_v_opt(const char **argv
, int opt
);
59 * env (the environment) is to be formatted like environ: "VAR=VALUE".
60 * To unset an environment variable use just "VAR".
62 int run_command_v_opt_cd_env(const char **argv
, int opt
, const char *dir
, const char *const *env
);
65 * The purpose of the following functions is to feed a pipe by running
66 * a function asynchronously and providing output that the caller reads.
68 * It is expected that no synchronization and mutual exclusion between
69 * the caller and the feed function is necessary so that the function
70 * can run in a thread without interfering with the caller.
74 * proc reads from in; closes it before return
75 * proc writes to out; closes it before return
76 * returns 0 on success, non-zero on failure
78 int (*proc
)(int in
, int out
, void *data
);
80 int in
; /* caller writes here and closes it */
81 int out
; /* caller reads from here and closes it */
91 int start_async(struct async
*async
);
92 int finish_async(struct async
*async
);