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