8 #include "argv-array.h"
10 struct child_process {
12 struct argv_array args;
15 * Using .in, .out, .err:
16 * - Specify 0 for no redirections (child inherits stdin, stdout,
17 * stderr from parent).
18 * - Specify -1 to have a pipe allocated as follows:
19 * .in: returns the writable pipe end; parent writes to it,
20 * the readable pipe end becomes child's stdin
21 * .out, .err: returns the readable pipe end; parent reads from
22 * it, the writable pipe end becomes child's stdout/stderr
23 * The caller of start_command() must close the returned FDs
24 * after it has completed reading from/writing to it!
25 * - Specify > 0 to set a channel to a particular FD as follows:
26 * .in: a readable FD, becomes child's stdin
27 * .out: a writable FD, becomes child's stdout/stderr
28 * .err: a writable FD, becomes child's stderr
29 * The specified FD is closed by start_command(), even in case
36 const char *const *env;
40 unsigned git_cmd:1; /* if this is to be git sub-command */
41 unsigned silent_exec_failure:1;
42 unsigned stdout_to_stderr:1;
44 unsigned clean_on_exit:1;
47 #define CHILD_PROCESS_INIT { NULL, ARGV_ARRAY_INIT }
49 int start_command(struct child_process *);
50 int finish_command(struct child_process *);
51 int run_command(struct child_process *);
53 extern char *find_hook(const char *name);
55 extern int run_hook_le(const char *const *env, const char *name, ...);
56 extern int run_hook_ve(const char *const *env, const char *name, va_list args);
59 __attribute__((deprecated))
60 extern int run_hook_with_custom_index(const char *index_file, const char *name, ...);
62 #define RUN_COMMAND_NO_STDIN 1
63 #define RUN_GIT_CMD 2 /*If this is to be git sub-command */
64 #define RUN_COMMAND_STDOUT_TO_STDERR 4
65 #define RUN_SILENT_EXEC_FAILURE 8
66 #define RUN_USING_SHELL 16
67 #define RUN_CLEAN_ON_EXIT 32
68 int run_command_v_opt(const char **argv, int opt);
71 * env (the environment) is to be formatted like environ: "VAR=VALUE".
72 * To unset an environment variable use just "VAR".
74 int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const char *const *env);
77 * The purpose of the following functions is to feed a pipe by running
78 * a function asynchronously and providing output that the caller reads.
80 * It is expected that no synchronization and mutual exclusion between
81 * the caller and the feed function is necessary so that the function
82 * can run in a thread without interfering with the caller.
86 * proc reads from in; closes it before return
87 * proc writes to out; closes it before return
88 * returns 0 on success, non-zero on failure
90 int (*proc)(int in, int out, void *data);
92 int in; /* caller writes here and closes it */
93 int out; /* caller reads from here and closes it */
103 int start_async(struct async *async);
104 int finish_async(struct async *async);