process.c: move sched_* parsers to a separate file

* sched.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* process.c: Move sys_sched_getscheduler, sys_sched_setscheduler,
sys_sched_getparam, sys_sched_setparam, sys_sched_get_priority_min,
sys_sched_rr_get_interval, and related code to sched.c.
diff --git a/sched.c b/sched.c
new file mode 100644
index 0000000..d3192fa
--- /dev/null
+++ b/sched.c
@@ -0,0 +1,84 @@
+#include "defs.h"
+
+#include <sched.h>
+
+#include "xlat/schedulers.h"
+
+int
+sys_sched_getscheduler(struct tcb *tcp)
+{
+	if (entering(tcp)) {
+		tprintf("%d", (int) tcp->u_arg[0]);
+	} else if (!syserror(tcp)) {
+		tcp->auxstr = xlookup(schedulers, tcp->u_rval);
+		if (tcp->auxstr != NULL)
+			return RVAL_STR;
+	}
+	return 0;
+}
+
+int
+sys_sched_setscheduler(struct tcb *tcp)
+{
+	if (entering(tcp)) {
+		struct sched_param p;
+		tprintf("%d, ", (int) tcp->u_arg[0]);
+		printxval(schedulers, tcp->u_arg[1], "SCHED_???");
+		if (umove(tcp, tcp->u_arg[2], &p) < 0)
+			tprintf(", %#lx", tcp->u_arg[2]);
+		else
+			tprintf(", { %d }", p.sched_priority);
+	}
+	return 0;
+}
+
+int
+sys_sched_getparam(struct tcb *tcp)
+{
+	if (entering(tcp)) {
+		tprintf("%d, ", (int) tcp->u_arg[0]);
+	} else {
+		struct sched_param p;
+		if (umove(tcp, tcp->u_arg[1], &p) < 0)
+			tprintf("%#lx", tcp->u_arg[1]);
+		else
+			tprintf("{ %d }", p.sched_priority);
+	}
+	return 0;
+}
+
+int
+sys_sched_setparam(struct tcb *tcp)
+{
+	if (entering(tcp)) {
+		struct sched_param p;
+		if (umove(tcp, tcp->u_arg[1], &p) < 0)
+			tprintf("%d, %#lx", (int) tcp->u_arg[0], tcp->u_arg[1]);
+		else
+			tprintf("%d, { %d }", (int) tcp->u_arg[0], p.sched_priority);
+	}
+	return 0;
+}
+
+int
+sys_sched_get_priority_min(struct tcb *tcp)
+{
+	if (entering(tcp)) {
+		printxval(schedulers, tcp->u_arg[0], "SCHED_???");
+	}
+	return 0;
+}
+
+int
+sys_sched_rr_get_interval(struct tcb *tcp)
+{
+	if (entering(tcp)) {
+		tprintf("%ld, ", (long) (pid_t) tcp->u_arg[0]);
+	} else {
+		if (syserror(tcp))
+			tprintf("%#lx", tcp->u_arg[1]);
+		else
+			print_timespec(tcp, tcp->u_arg[1]);
+	}
+	return 0;
+}