lib/process: Add option to pipe to process stdin

[petitboot] / lib / process / process.h

diff --git a/lib/process/process.h b/lib/process/process.h
index 9e2a2d1b013c31c6eeb8af153ddbb54071bbe04d..eb6e3360d73c914e8f3421d5cf2d4e447eb2fc75 100644 (file)
--- a/lib/process/process.h
+++ b/lib/process/process.h
@@ -23,16 +23,27 @@
 
 struct process;
 struct procset;
+struct process_info;
 
 typedef void   (*process_exit_cb)(struct process *);
 
+struct process_stdout {
+       size_t len;
+       char *buf;
+};
+
 struct process {
        /* caller-provided configuration */
        const char              *path;
        const char              **argv;
        bool                    keep_stdout;
+       bool                    add_stderr;
+       bool                    raw_stdout;
        process_exit_cb         exit_cb;
        void                    *data;
+       waiter_cb               stdout_cb;
+       void                    *stdout_data;
+       char                    *pipe_stdin;
 
        /* runtime data */
        pid_t                   pid;
@@ -41,13 +52,14 @@ struct process {
 
        /* post-execution information */
        int                     exit_status;
+       bool                    cancelled;
 };
 
 /* Process management system init. process_init must be called before
  * process_create. The pointer returned can be talloc_free()-ed, or can be
  * automatically freed through destruction of the ctx talloc tree.
  */
-struct procset *process_init(void *ctx, struct waitset *set);
+struct procset *process_init(void *ctx, struct waitset *set, bool dry_run);
 
 struct process *process_create(void *ctx);
 
@@ -57,13 +69,24 @@ struct process *process_create(void *ctx);
  */
 void process_release(struct process *process);
 
-/* Synchronous interface. These functions will all block while waiting for
- * the process to exit.
+/* Synchronous interface. The process_run_sync, process_run_simple and
+ * process_get_stdout functions will all block while waiting for the child
+ * process to exit.  Calls to the variadic versions must have a NULL terminating
+ * argument.  For the process_get_stdout calls stderr will go to the log.
  */
 int process_run_sync(struct process *process);
-int process_run_simple_argv(void *ctx, const char *argv[]);
-int process_run_simple(void *ctx, const char *name, ...)
-       __attribute__((sentinel(0)));
+int process_get_stdout_argv(void *ctx, struct process_stdout **stdout,
+       const char *argv[]);
+int process_get_stdout(void *ctx, struct process_stdout **stdout,
+       const char *path, ...) __attribute__((sentinel(0)));
+
+static inline int process_run_simple_argv(void *ctx, const char *argv[])
+{
+       return process_get_stdout_argv(ctx, NULL, argv);
+}
+#define process_run_simple(_ctx, _path, args...) \
+       process_get_stdout(_ctx, NULL, _path, args)
+
 
 /* Asynchronous interface. When a process is run with process_run_async, the
  * function returns without wait()ing for the child process to exit. If the
@@ -73,4 +96,14 @@ int process_run_simple(void *ctx, const char *name, ...)
 int process_run_async(struct process *process);
 
 void process_stop_async(struct process *process);
+void process_stop_async_all(void);
+
+/* helper function to determine if a process exited cleanly, with a non-zero
+ * exit status */
+bool process_exit_ok(struct process *process);
+
+/* Functions to assist callers using a custom stdout callback */
+struct process *procinfo_get_process(struct process_info *procinfo);
+int process_process_stdout(struct process_info *procinfo, char **line);
+
 #endif /* PROCESS_H */