Add time command (that only does posix mode).

1 files changed, 48 insertions, 0 deletions

diff --git a/toys/posix/time.c b/toys/posix/time.c
new file mode 100644
index 00000000..0ccba19c
--- /dev/null
+++ b/toys/posix/time.c
@@ -0,0 +1,48 @@
+/* time.c - time a simple command
+ *
+ * Copyright 2013 Rob Landley <rob@landley.net>
+ *
+ * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/time.html
+
+USE_TIME(NEWTOY(time, "<1^p", TOYFLAG_USR|TOYFLAG_BIN))
+
+config TIME
+  bool "time"
+  default y
+  help
+    usage: time [-p] COMMAND [ARGS...]
+
+    Run command line and report real, user, and system time elapsed in seconds.
+    (real = clock on the wall, user = cpu used by command's code,
+    system = cpu used by OS on behalf of command.)
+
+    -p	posix mode (ignored)
+*/
+
+#include "toys.h"
+
+void time_main(void)
+{
+  pid_t pid;
+  struct timeval tv, tv2;
+
+  gettimeofday(&tv, NULL);
+  if (!(pid = fork())) xexec(toys.optargs);
+  else {
+    int stat;
+    struct rusage ru;
+    float r, u, s;
+
+    wait4(pid, &stat, 0, &ru);
+    gettimeofday(&tv2, NULL);
+    if (tv.tv_usec > tv2.tv_usec) {
+      tv2.tv_usec += 1000000;
+      tv2.tv_sec--;
+    }
+    r = (tv2.tv_sec-tv.tv_sec)+((tv2.tv_usec-tv.tv_usec)/1000000.0);
+    u = ru.ru_utime.tv_sec+(ru.ru_utime.tv_usec/1000000.0);
+    s = ru.ru_stime.tv_sec+(ru.ru_stime.tv_usec/1000000.0);
+    fprintf(stderr, "real %f\nuser %f\nsys %f\n", r, u, s);
+    toys.exitval = WIFEXITED(stat) ? WEXITSTATUS(stat) : WTERMSIG(stat);
+  }
+}