core: Implement the spawn functions.

* src/gpg-error.h.in  (GPGRT_SPAWN_NONBLOCK): New const.
(GPGRT_SPAWN_RUN_ASFW): New const.
(GPGRT_SPAWN_DETACHED): New const.
(gpgrt_make_pipe): New function.
(gpgrt_create_pipe): New macro.
(gpgrt_create_inbound_pipe): New macro.
(gpgrt_create_outbound_pipe): New macro.
(gpgrt_spawn_process): New function.
(gpgrt_spawn_process_fd): New function.
(gpgrt_spawn_process_detached): New function.
(gpgrt_wait_process): New function.
(gpgrt_wait_processes): New function.
(gpgrt_kill_process): New function.
(gpgrt_release_process): New function.
* src/gpg-error.def.in, src/gpg-error.vers: Add new functions.
* src/visibility.c, src/visibility.h: Add wrappers for new functions.
* src/spawn-posix.c: Rework to better fit the use in gpgrt.  Rename
all public function with a _gpgrt prefix.
* src/spawn-w32.c: Ditto.
* src/gpgrt-int.h: Likewise.
* src/Makefile.am (arch_sources): Add spawn-posix.c and spawn-w32.c.
* src/w32-add.h: Add pid_t typedef as a temporary hack.
* configure.ac: Check for signal.h and getrlimit.
(AC_FUNC_FORK): New.
--

This does build but porting the tests and further changes are
required.  Don't assume that the API for the new fucntions is stable.

Signed-off-by: Werner Koch <wk@gnupg.org>

1 files changed, 51 insertions, 0 deletions

diff --git a/src/gpg-error.h.in b/src/gpg-error.h.in
index 20d196a..991636d 100644
--- a/src/gpg-error.h.in
+++ b/src/gpg-error.h.in
@@ -1025,6 +1025,57 @@ void _gpgrt_log_assert (const char *expr, const char *file, int line,
 
 #endif /*GPGRT_ENABLE_LOG_MACROS*/
 
+
+/*
+ * Spawn functions
+ */
+
+#define GPGRT_SPAWN_NONBLOCK   16 /* Set the streams to non-blocking.      */
+#define GPGRT_SPAWN_RUN_ASFW   64 /* Use AllowSetForegroundWindow on W32.  */
+#define GPGRT_SPAWN_DETACHED  128 /* Start the process in the background.  */
+
+/* Function and convenience macros to create pipes.  */
+gpg_err_code_t gpgrt_make_pipe (int filedes[2], estream_t *r_fp,
+                                int direction, int nonblock);
+#define gpgrt_create_pipe(a)              gpgrt_make_pipe ((a),NULL,  0,  0);
+#define gpgrt_create_inbound_pipe(a,b,c)  gpgrt_make_pipe ((a), (b), -1,(c));
+#define gpgrt_create_outbound_pipe(a,b,c) gpgrt_make_pipe ((a), (b),  1,(c));
+
+
+/* Fork and exec PGMNAME.  */
+gpg_err_code_t gpgrt_spawn_process (const char *pgmname, const char *argv[],
+                                    int *execpt, void (*preexec)(void),
+                                    unsigned int flags,
+                                    estream_t *r_infp,
+                                    estream_t *r_outfp,
+                                    estream_t *r_errfp,
+                                    pid_t *pid);
+
+/* Fork and exec PGNNAME and connect the process to the given FDs.  */
+gpg_err_code_t gpgrt_spawn_process_fd (const char *pgmname, const char *argv[],
+                                       int infd, int outfd, int errfd,
+                                       pid_t *pid);
+
+/* Fork and exec PGMNAME as a detached process.  */
+gpg_err_code_t gpgrt_spawn_process_detached (const char *pgmname,
+                                             const char *argv[],
+                                             const char *envp[] );
+
+/* Wait for a single process.  */
+gpg_err_code_t gpgrt_wait_process (const char *pgmname, pid_t pid, int hang,
+                                int *r_exitcode);
+
+/* Wait for a multiple processes.  */
+gpg_err_code_t gpgrt_wait_processes (const char **pgmnames, pid_t *pids,
+                                     size_t count, int hang, int *r_exitcodes);
+
+/* Kill the process identified by PID.  */
+void gpgrt_kill_process (pid_t pid);
+
+/* Release process resources identified by PID.  */
+void gpgrt_release_process (pid_t pid);
+
+
 
 #ifdef __cplusplus
 }