| #ifndef RUN_COMMAND_H |
| #define RUN_COMMAND_H |
| |
| #ifndef NO_PTHREADS |
| #include <pthread.h> |
| #endif |
| |
| struct child_process { |
| const char **argv; |
| 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); |
| extern int run_hook(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 |