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Commit | Line | Data |
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b1bf95bb JW |
1 | #ifndef RUN_COMMAND_H |
2 | #define RUN_COMMAND_H | |
3 | ||
f6b60983 | 4 | #ifndef NO_PTHREADS |
200a76b7 JS |
5 | #include <pthread.h> |
6 | #endif | |
7 | ||
c460c0ec JK |
8 | #include "argv-array.h" |
9 | ||
f1000898 SP |
10 | struct child_process { |
11 | const char **argv; | |
c460c0ec | 12 | struct argv_array args; |
19a583dc | 13 | struct argv_array env_array; |
ebcb5d16 | 14 | pid_t pid; |
c20181e3 JS |
15 | /* |
16 | * Using .in, .out, .err: | |
17 | * - Specify 0 for no redirections (child inherits stdin, stdout, | |
18 | * stderr from parent). | |
19 | * - Specify -1 to have a pipe allocated as follows: | |
20 | * .in: returns the writable pipe end; parent writes to it, | |
21 | * the readable pipe end becomes child's stdin | |
22 | * .out, .err: returns the readable pipe end; parent reads from | |
23 | * it, the writable pipe end becomes child's stdout/stderr | |
24 | * The caller of start_command() must close the returned FDs | |
25 | * after it has completed reading from/writing to it! | |
26 | * - Specify > 0 to set a channel to a particular FD as follows: | |
27 | * .in: a readable FD, becomes child's stdin | |
28 | * .out: a writable FD, becomes child's stdout/stderr | |
4f41b611 | 29 | * .err: a writable FD, becomes child's stderr |
c20181e3 JS |
30 | * The specified FD is closed by start_command(), even in case |
31 | * of errors! | |
32 | */ | |
4919bf03 | 33 | int in; |
f4bba25b | 34 | int out; |
f3b33f1d | 35 | int err; |
1568fea0 | 36 | const char *dir; |
ee493148 | 37 | const char *const *env; |
f1000898 | 38 | unsigned no_stdin:1; |
e4507ae8 | 39 | unsigned no_stdout:1; |
b73a4397 | 40 | unsigned no_stderr:1; |
f1000898 | 41 | unsigned git_cmd:1; /* if this is to be git sub-command */ |
c024beb5 | 42 | unsigned silent_exec_failure:1; |
f1000898 | 43 | unsigned stdout_to_stderr:1; |
8dba1e63 | 44 | unsigned use_shell:1; |
afe19ff7 | 45 | unsigned clean_on_exit:1; |
f1000898 SP |
46 | }; |
47 | ||
19a583dc | 48 | #define CHILD_PROCESS_INIT { NULL, ARGV_ARRAY_INIT, ARGV_ARRAY_INIT } |
483bbd4e | 49 | void child_process_init(struct child_process *); |
d3180279 | 50 | |
ebcb5d16 SP |
51 | int start_command(struct child_process *); |
52 | int finish_command(struct child_process *); | |
f1000898 SP |
53 | int run_command(struct child_process *); |
54 | ||
dcf69262 | 55 | extern const char *find_hook(const char *name); |
9fe3edc4 | 56 | LAST_ARG_MUST_BE_NULL |
15048f8a BP |
57 | extern int run_hook_le(const char *const *env, const char *name, ...); |
58 | extern int run_hook_ve(const char *const *env, const char *name, va_list args); | |
59 | ||
95d3c4f5 | 60 | #define RUN_COMMAND_NO_STDIN 1 |
77cb17e9 | 61 | #define RUN_GIT_CMD 2 /*If this is to be git sub-command */ |
cd83c74c | 62 | #define RUN_COMMAND_STDOUT_TO_STDERR 4 |
c024beb5 | 63 | #define RUN_SILENT_EXEC_FAILURE 8 |
8dba1e63 | 64 | #define RUN_USING_SHELL 16 |
10c6cddd | 65 | #define RUN_CLEAN_ON_EXIT 32 |
9b0b5093 | 66 | int run_command_v_opt(const char **argv, int opt); |
3427b375 AR |
67 | |
68 | /* | |
69 | * env (the environment) is to be formatted like environ: "VAR=VALUE". | |
70 | * To unset an environment variable use just "VAR". | |
71 | */ | |
ee493148 | 72 | int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const char *const *env); |
b1bf95bb | 73 | |
911ec99b JK |
74 | /** |
75 | * Execute the given command, capturing its stdout in the given strbuf. | |
76 | * Returns -1 if starting the command fails or reading fails, and otherwise | |
77 | * returns the exit code of the command. The output collected in the | |
78 | * buffer is kept even if the command returns a non-zero exit. The hint field | |
79 | * gives a starting size for the strbuf allocation. | |
80 | * | |
81 | * The fields of "cmd" should be set up as they would for a normal run_command | |
82 | * invocation. But note that there is no need to set cmd->out; the function | |
83 | * sets it up for the caller. | |
84 | */ | |
85 | int capture_command(struct child_process *cmd, struct strbuf *buf, size_t hint); | |
86 | ||
2d22c208 JS |
87 | /* |
88 | * The purpose of the following functions is to feed a pipe by running | |
89 | * a function asynchronously and providing output that the caller reads. | |
90 | * | |
91 | * It is expected that no synchronization and mutual exclusion between | |
92 | * the caller and the feed function is necessary so that the function | |
93 | * can run in a thread without interfering with the caller. | |
94 | */ | |
95 | struct async { | |
96 | /* | |
ae6a5609 EFL |
97 | * proc reads from in; closes it before return |
98 | * proc writes to out; closes it before return | |
2d22c208 JS |
99 | * returns 0 on success, non-zero on failure |
100 | */ | |
ae6a5609 | 101 | int (*proc)(int in, int out, void *data); |
2d22c208 | 102 | void *data; |
ae6a5609 | 103 | int in; /* caller writes here and closes it */ |
2d22c208 | 104 | int out; /* caller reads from here and closes it */ |
f6b60983 | 105 | #ifdef NO_PTHREADS |
2d22c208 | 106 | pid_t pid; |
618ebe9f | 107 | #else |
200a76b7 | 108 | pthread_t tid; |
ae6a5609 EFL |
109 | int proc_in; |
110 | int proc_out; | |
618ebe9f | 111 | #endif |
2d22c208 JS |
112 | }; |
113 | ||
114 | int start_async(struct async *async); | |
115 | int finish_async(struct async *async); | |
116 | ||
b1bf95bb | 117 | #endif |