+//usage:#define sysctl_trivial_usage
+//usage: "[OPTIONS] [VALUE]..."
+//usage:#define sysctl_full_usage "\n\n"
+//usage: "Configure kernel parameters at runtime\n"
+//usage: "\n -n Don't print key names"
+//usage: "\n -e Don't warn about unknown keys"
+//usage: "\n -w Change sysctl setting"
+//usage: "\n -p FILE Load sysctl settings from FILE (default /etc/sysctl.conf)"
+//usage: "\n -a Display all values"
+//usage: "\n -A Display all values in table form"
+//usage:
+//usage:#define sysctl_example_usage
+//usage: "sysctl [-n] [-e] variable...\n"
+//usage: "sysctl [-n] [-e] -w variable=value...\n"
+//usage: "sysctl [-n] [-e] -a\n"
+//usage: "sysctl [-n] [-e] -p file (default /etc/sysctl.conf)\n"
+//usage: "sysctl [-n] [-e] -A\n"
+