--- /dev/null
+/* The <times.h> header is for time times() system call. */
+
+#ifndef _TIMES_H
+#define _TIMES_H
+
+#ifndef _CLOCK_T
+#define _CLOCK_T
+typedef long clock_t; /* time in ticks since process started */
+#endif
+
+struct tms {
+ clock_t tms_utime;
+ clock_t tms_stime;
+ clock_t tms_cutime;
+ clock_t tms_cstime;
+};
+
+
+/* Function Prototypes. */
+#ifndef _ANSI_H
+#include <ansi.h>
+#endif
+
+_PROTOTYPE( clock_t times, (struct tms *_buffer) );
+
+#endif /* _TIMES_H */
--- /dev/null
+/* The <sys/wait.h> header contains macros related to wait(). The value
+ * returned by wait() and waitpid() depends on whether the process
+ * terminated by an exit() call, was killed by a signal, or was stopped
+ * due to job control, as follows:
+ *
+ * High byte Low byte
+ * +---------------------+
+ * exit(status) | status | 0 |
+ * +---------------------+
+ * killed by signal | 0 | signal |
+ * +---------------------+
+ * stopped (job control) | signal | 0177 |
+ * +---------------------+
+ */
+
+#ifndef _WAIT_H
+#define _WAIT_H
+
+#define _LOW(v) ( (v) & 0377)
+#define _HIGH(v) ( ((v) >> 8) & 0377)
+
+#define WNOHANG 1 /* do not wait for child to exit */
+#define WUNTRACED 2 /* for job control; not implemented */
+
+#define WIFEXITED(s) (_LOW(s) == 0) /* normal exit */
+#define WEXITSTATUS(s) (_HIGH(s)) /* exit status */
+#define WTERMSIG(s) (_LOW(s) & 0177) /* sig value */
+#define WIFSIGNALED(s) (((unsigned int)(s)-1 & 0xFFFF) < 0xFF) /* signaled */
+#define WIFSTOPPED(s) (_LOW(s) == 0177) /* stopped */
+#define WSTOPSIG(s) (_HIGH(s) & 0377) /* stop signal */
+
+/* Function Prototypes. */
+#ifndef _ANSI_H
+#include <ansi.h>
+#endif
+
+_PROTOTYPE( pid_t wait, (int *_stat_loc) );
+_PROTOTYPE( pid_t waitpid, (pid_t _pid, int *_stat_loc, int _options) );
+
+#endif /* _WAIT_H */