#ifndef RUN_COMMAND_H
#define RUN_COMMAND_H
-enum {
- ERR_RUN_COMMAND_FORK = 10000,
- ERR_RUN_COMMAND_EXEC,
- ERR_RUN_COMMAND_PIPE,
- ERR_RUN_COMMAND_WAITPID,
- ERR_RUN_COMMAND_WAITPID_WRONG_PID,
- ERR_RUN_COMMAND_WAITPID_SIGNAL,
- ERR_RUN_COMMAND_WAITPID_NOEXIT,
-};
-
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 > 0 not supported
+ * The specified FD is closed by start_command(), even in case
+ * of errors!
+ */
int in;
int out;
+ int err;
const char *dir;
- unsigned close_in:1;
- unsigned close_out:1;
+ 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;
+ void (*preexec_cb)(void);
};
int start_command(struct child_process *);
int finish_command(struct child_process *);
int run_command(struct child_process *);
+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
int run_command_v_opt(const char **argv, int opt);
-int run_command_v_opt_cd(const char **argv, int opt, const char *dir);
+
+/*
+ * 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 writes to fd and closes it;
+ * returns 0 on success, non-zero on failure
+ */
+ int (*proc)(int fd, void *data);
+ void *data;
+ int out; /* caller reads from here and closes it */
+#ifndef WIN32
+ pid_t pid;
+#else
+ HANDLE tid;
+ int fd_for_proc;
+#endif
+};
+
+int start_async(struct async *async);
+int finish_async(struct async *async);
#endif