1 files changed, 48 insertions, 0 deletions
diff --git a/toys/posix/renice.c b/toys/posix/renice.c
new file mode 100644
index 00000000..8c206447
--- /dev/null
+++ b/toys/posix/renice.c
@@ -0,0 +1,48 @@
+/* renice.c - renice process
+ *
+ * Copyright 2013 CE Strake <strake888 at gmail.com>
+ *
+ * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/renice.html
+
+USE_RENICE(NEWTOY(renice, "<1gpun#|", TOYFLAG_BIN))
+
+config RENICE
+  bool "renice"
+  default y
+  help
+    usage: renice [-gpu] -n increment ID ...
+*/
+
+#define FOR_renice
+#include "toys.h"
+
+GLOBALS(
+  long nArgu;
+)
+
+void renice_main(void) {
+  int which = (toys.optflags & FLAG_g) ? PRIO_PGRP :
+              ((toys.optflags & FLAG_u) ? PRIO_USER : PRIO_PROCESS);
+  char **arg;
+
+  for (arg = toys.optargs; *arg; arg++) {
+    char *s = *arg;
+    int id = -1;
+
+    if (toys.optflags & FLAG_u) {
+      struct passwd *p = getpwnam(s);
+      if (p) id = p->pw_uid;
+    } else {
+      id = strtol(s, &s, 10);
+      if (*s) id = -1;
+    }
+
+    if (id < 0) {
+      error_msg("bad '%s'", *arg);
+      continue;
+    }
+
+    if (setpriority(which, id, getpriority(which, id)+TT.nArgu) < 0)
+      perror_msg("setpriority %d", id);
+  }
+}