Andrew's git - gitweb.git/blob

   1#ifndef RUN_COMMAND_H
   2#define RUN_COMMAND_H
   3
   4enum {
   5        ERR_RUN_COMMAND_FORK = 10000,
   6        ERR_RUN_COMMAND_EXEC,
   7        ERR_RUN_COMMAND_PIPE,
   8        ERR_RUN_COMMAND_WAITPID,
   9        ERR_RUN_COMMAND_WAITPID_WRONG_PID,
  10        ERR_RUN_COMMAND_WAITPID_SIGNAL,
  11        ERR_RUN_COMMAND_WAITPID_NOEXIT,
  12};
  13
  14struct child_process {
  15        const char **argv;
  16        pid_t pid;
  17        int in;
  18        int out;
  19        int err;
  20        const char *dir;
  21        const char *const *env;
  22        unsigned close_in:1;
  23        unsigned close_out:1;
  24        unsigned no_stdin:1;
  25        unsigned no_stdout:1;
  26        unsigned no_stderr:1;
  27        unsigned git_cmd:1; /* if this is to be git sub-command */
  28        unsigned stdout_to_stderr:1;
  29};
  30
  31int start_command(struct child_process *);
  32int finish_command(struct child_process *);
  33int run_command(struct child_process *);
  34
  35#define RUN_COMMAND_NO_STDIN 1
  36#define RUN_GIT_CMD          2  /*If this is to be git sub-command */
  37#define RUN_COMMAND_STDOUT_TO_STDERR 4
  38int run_command_v_opt(const char **argv, int opt);
  39int run_command_v_opt_cd(const char **argv, int opt, const char *dir);
  40
  41/*
  42 * env (the environment) is to be formatted like environ: "VAR=VALUE".
  43 * To unset an environment variable use just "VAR".
  44 */
  45int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const char *const *env);
  46
  47/*
  48 * The purpose of the following functions is to feed a pipe by running
  49 * a function asynchronously and providing output that the caller reads.
  50 *
  51 * It is expected that no synchronization and mutual exclusion between
  52 * the caller and the feed function is necessary so that the function
  53 * can run in a thread without interfering with the caller.
  54 */
  55struct async {
  56        /*
  57         * proc writes to fd and closes it;
  58         * returns 0 on success, non-zero on failure
  59         */
  60        int (*proc)(int fd, void *data);
  61        void *data;
  62        int out;        /* caller reads from here and closes it */
  63        pid_t pid;
  64};
  65
  66int start_async(struct async *async);
  67int finish_async(struct async *async);
  68
  69#endif