parlib: add a helper to run a process and wait
Signed-off-by: Barret Rhoden <brho@cs.berkeley.edu>
diff --git a/user/parlib/include/parlib/parlib.h b/user/parlib/include/parlib/parlib.h
index d7c0727..aecdb28 100644
--- a/user/parlib/include/parlib/parlib.h
+++ b/user/parlib/include/parlib/parlib.h
@@ -74,6 +74,7 @@
pid_t create_child_with_stdfds(const char *exe, int argc, char *const argv[],
char *const envp[]);
int provision_core_set(pid_t pid, const struct core_set *cores);
+int run_and_wait(const char *exe, int argc, char *const argv[]);
/* Debugging */
void set_notify_9(void (*handler)(struct event_msg *ev_msg,
diff --git a/user/parlib/parlib.c b/user/parlib/parlib.c
index 33bead9..01b137d 100644
--- a/user/parlib/parlib.c
+++ b/user/parlib/parlib.c
@@ -7,6 +7,7 @@
#include <parlib/ros_debug.h>
#include <parlib/event.h>
#include <stdlib.h>
+#include <sys/wait.h>
/* Control variables */
bool parlib_wants_to_be_mcp = TRUE;
@@ -93,6 +94,23 @@
return kid;
}
+/* Helper for kicking off a process, but with little specific error handling */
+int run_and_wait(const char *exe, int argc, char *const argv[])
+{
+ extern char **environ;
+
+ pid_t kid;
+
+ kid = create_child_with_stdfds(exe, argc, argv, environ);
+ if (kid < 0)
+ return -1;
+ if (sys_proc_run(kid) < 0)
+ return -1;
+ if (waitpid(kid, NULL, 0) != kid)
+ return -1;
+ return 0;
+}
+
/* Provisions the CG cores to PID. Returns -1 if any of them fail. */
int provision_core_set(pid_t pid, const struct core_set *cores)
{
