mirror of
https://github.com/git/git.git
synced 2024-12-18 22:33:34 +08:00
c460c0ecdc
All child_process structs need to point to an argv. For flexibility, we do not mandate the use of a dynamic argv_array. However, because the child_process does not own the memory, this can make memory management with a separate argv_array difficult. For example, if a function calls start_command but not finish_command, the argv memory must persist. The code needs to arrange to clean up the argv_array separately after finish_command runs. As a result, some of our code in this situation just leaks the memory. To help such cases, this patch adds a built-in argv_array to the child_process, which gets cleaned up automatically (both in finish_command and when start_command fails). Callers may use it if they choose, but can continue to use the raw argv if they wish. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
105 lines
3.2 KiB
C
105 lines
3.2 KiB
C
#ifndef RUN_COMMAND_H
|
|
#define RUN_COMMAND_H
|
|
|
|
#ifndef NO_PTHREADS
|
|
#include <pthread.h>
|
|
#endif
|
|
|
|
#include "argv-array.h"
|
|
|
|
struct child_process {
|
|
const char **argv;
|
|
struct argv_array args;
|
|
pid_t pid;
|
|
/*
|
|
* Using .in, .out, .err:
|
|
* - Specify 0 for no redirections (child inherits stdin, stdout,
|
|
* stderr from parent).
|
|
* - Specify -1 to have a pipe allocated as follows:
|
|
* .in: returns the writable pipe end; parent writes to it,
|
|
* the readable pipe end becomes child's stdin
|
|
* .out, .err: returns the readable pipe end; parent reads from
|
|
* it, the writable pipe end becomes child's stdout/stderr
|
|
* The caller of start_command() must close the returned FDs
|
|
* after it has completed reading from/writing to it!
|
|
* - Specify > 0 to set a channel to a particular FD as follows:
|
|
* .in: a readable FD, becomes child's stdin
|
|
* .out: a writable FD, becomes child's stdout/stderr
|
|
* .err: a writable FD, becomes child's stderr
|
|
* The specified FD is closed by start_command(), even in case
|
|
* of errors!
|
|
*/
|
|
int in;
|
|
int out;
|
|
int err;
|
|
const char *dir;
|
|
const char *const *env;
|
|
unsigned no_stdin:1;
|
|
unsigned no_stdout:1;
|
|
unsigned no_stderr:1;
|
|
unsigned git_cmd:1; /* if this is to be git sub-command */
|
|
unsigned silent_exec_failure:1;
|
|
unsigned stdout_to_stderr:1;
|
|
unsigned use_shell:1;
|
|
unsigned clean_on_exit:1;
|
|
};
|
|
|
|
int start_command(struct child_process *);
|
|
int finish_command(struct child_process *);
|
|
int run_command(struct child_process *);
|
|
|
|
extern char *find_hook(const char *name);
|
|
LAST_ARG_MUST_BE_NULL
|
|
extern int run_hook_le(const char *const *env, const char *name, ...);
|
|
extern int run_hook_ve(const char *const *env, const char *name, va_list args);
|
|
|
|
LAST_ARG_MUST_BE_NULL
|
|
__attribute__((deprecated))
|
|
extern int run_hook_with_custom_index(const char *index_file, const char *name, ...);
|
|
|
|
#define RUN_COMMAND_NO_STDIN 1
|
|
#define RUN_GIT_CMD 2 /*If this is to be git sub-command */
|
|
#define RUN_COMMAND_STDOUT_TO_STDERR 4
|
|
#define RUN_SILENT_EXEC_FAILURE 8
|
|
#define RUN_USING_SHELL 16
|
|
#define RUN_CLEAN_ON_EXIT 32
|
|
int run_command_v_opt(const char **argv, int opt);
|
|
|
|
/*
|
|
* env (the environment) is to be formatted like environ: "VAR=VALUE".
|
|
* To unset an environment variable use just "VAR".
|
|
*/
|
|
int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const char *const *env);
|
|
|
|
/*
|
|
* The purpose of the following functions is to feed a pipe by running
|
|
* a function asynchronously and providing output that the caller reads.
|
|
*
|
|
* It is expected that no synchronization and mutual exclusion between
|
|
* the caller and the feed function is necessary so that the function
|
|
* can run in a thread without interfering with the caller.
|
|
*/
|
|
struct async {
|
|
/*
|
|
* proc reads from in; closes it before return
|
|
* proc writes to out; closes it before return
|
|
* returns 0 on success, non-zero on failure
|
|
*/
|
|
int (*proc)(int in, int out, void *data);
|
|
void *data;
|
|
int in; /* caller writes here and closes it */
|
|
int out; /* caller reads from here and closes it */
|
|
#ifdef NO_PTHREADS
|
|
pid_t pid;
|
|
#else
|
|
pthread_t tid;
|
|
int proc_in;
|
|
int proc_out;
|
|
#endif
|
|
};
|
|
|
|
int start_async(struct async *async);
|
|
int finish_async(struct async *async);
|
|
|
|
#endif
|