lazy index hashing

[git.git] / run-command.h

diff --git a/run-command.h b/run-command.h
index 70b477a7483ce3a4997b20ee02223eeb483bde6c..1fc781d7668468f9e74bd430b7569dc040440ba8 100644 (file)
--- a/run-command.h
+++ b/run-command.h
@@ -1,20 +1,69 @@
 #ifndef RUN_COMMAND_H
 #define RUN_COMMAND_H
 
-#define MAX_RUN_COMMAND_ARGS 256
 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,
 };
 
-#define RUN_COMMAND_NO_STDIO 1
+struct child_process {
+       const char **argv;
+       pid_t pid;
+       int in;
+       int out;
+       int err;
+       const char *dir;
+       const char *const *env;
+       unsigned close_in:1;
+       unsigned close_out:1;
+       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 stdout_to_stderr:1;
+};
+
+int start_command(struct child_process *);
+int finish_command(struct child_process *);
+int run_command(struct child_process *);
+
+#define RUN_COMMAND_NO_STDIN 1
 #define RUN_GIT_CMD         2  /*If this is to be git sub-command */
-int run_command_v_opt(int argc, const char **argv, int opt);
-int run_command_v(int argc, const char **argv);
-int run_command(const char *cmd, ...);
+#define RUN_COMMAND_STDOUT_TO_STDERR 4
+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 */
+       pid_t pid;
+};
+
+int start_async(struct async *async);
+int finish_async(struct async *async);
 
 #endif