Add 'nice' and replace 'renice' with a new implementation.

2 files changed, 17 insertions, 4 deletions

diff --git a/include/applets.h b/include/applets.h
index 90d4195cc..125703216 100644
--- a/include/applets.h
+++ b/include/applets.h
@@ -412,6 +412,9 @@
 #ifdef CONFIG_NETSTAT
         APPLET(netstat, netstat_main, _BB_DIR_BIN, _BB_SUID_NEVER)
 #endif
+#ifdef CONFIG_NICE
+        APPLET(nice, nice_main, _BB_DIR_BIN, _BB_SUID_NEVER)
+#endif
 #ifdef CONFIG_NSLOOKUP
         APPLET(nslookup, nslookup_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
 #endif
diff --git a/include/usage.h b/include/usage.h
index c53ead0c7..fd0f68166 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -1813,6 +1813,13 @@
         "\t-w raw sockets\n" \
         "\t-x unix sockets"
 
+#define nice_trivial_usage \
+        "[-n ADJUST] [COMMAND [ARG] ...]"
+#define nice_full_usage \
+        "Nice runs a program with modified scheduling priority.\n\n" \
+        "Options:\n" \
+        "\t-n ADJUST\tAdjust the scheduling priority by ADJUST.\n" \
+
 #define nslookup_trivial_usage \
         "[HOST] [SERVER]"
 #define nslookup_full_usage \
@@ -2011,11 +2018,14 @@
         "\t-d\t\tdelay interval for rebooting."
 
 #define renice_trivial_usage \
-        "priority pid [pid ...]"
+        "{{-n INCREMENT} | PRIORITY} [[ -p | -g | -u ] ID ...]"
 #define renice_full_usage \
-        "Changes priority of running processes. Allowed priorities range\n" \
-        "from 20 (the process runs only when nothing else is running) to 0\n" \
-        "(default priority) to -20 (almost nothing else ever gets to run)."
+        "Changes priority of running processes.\n\n" \
+        "Options:\n" \
+        "\t-n\tadjusts current nice value (smaller is faster)\n" \
+        "\t-p\tprocess id(s) (default)\n" \
+        "\t-g\tprocess group id(s)\n" \
+        "\t-u\tprocess user name(s) and/or id(s)"
 
 #define reset_trivial_usage \
         ""