diff options
Diffstat (limited to 'manual')
| -rw-r--r-- | manual/examples/longopt.c | 20 | ||||
| -rw-r--r-- | manual/sysinfo.texi | 21 |
2 files changed, 33 insertions, 8 deletions
diff --git a/manual/examples/longopt.c b/manual/examples/longopt.c index 9d6bd53c0f..e6567c7caf 100644 --- a/manual/examples/longopt.c +++ b/manual/examples/longopt.c @@ -17,21 +17,21 @@ main (argc, argv) static struct option long_options[] = { /* These options set a flag. */ - {"verbose", 0, &verbose_flag, 1}, - {"brief", 0, &verbose_flag, 0}, + {"verbose", no_argument, &verbose_flag, 1}, + {"brief", no_argument, &verbose_flag, 0}, /* These options don't set a flag. We distinguish them by their indices. */ - {"add", 1, 0, 0}, - {"append", 0, 0, 0}, - {"delete", 1, 0, 0}, - {"create", 0, 0, 0}, - {"file", 1, 0, 0}, + {"add", required_argument, 0, 'a'}, + {"append", no_argument, 0, 'b'}, + {"delete", required_argument, 0, 'd'}, + {"create", no_argument, 0, 'c'}, + {"file", required_argument, 0, 'f'}, {0, 0, 0, 0} }; /* @code{getopt_long} stores the option index here. */ int option_index = 0; - c = getopt_long (argc, argv, "abc:d:", + c = getopt_long (argc, argv, "abc:d:f:", long_options, &option_index); /* Detect the end of the options. */ @@ -66,6 +66,10 @@ main (argc, argv) printf ("option -d with value `%s'\n", optarg); break; + case 'f': + printf ("option -f with value `%s'\n", optarg); + break; + case '?': /* @code{getopt_long} already printed an error message. */ break; diff --git a/manual/sysinfo.texi b/manual/sysinfo.texi index ee5009b2ac..1768d01273 100644 --- a/manual/sysinfo.texi +++ b/manual/sysinfo.texi @@ -15,6 +15,7 @@ can make changes. machine type * Filesystem Handling:: Controlling/querying mounts * System Parameters:: Getting and setting various system parameters +* Load Average:: Getting the system load average @end menu To get information on parameters of the system that are built into the @@ -1190,3 +1191,23 @@ parameters are: @item @code{bdflush} @end itemize + +@node Load Average +@section Getting the system load average + +This section describes the @code{getloadavg} function, which gets the 1, 5 +and 15 minute load averages of the system. The load average is the number of +processes in the system run queue, averaged over various periods of time +(1, 5 and 15 minutes in this case). + +The symbols used in this section are declared in the file @file{stdlib.h}. + +@comment stdlib.h +@comment BSD +@deftypefun int getloadavg (double @var{loadavg}[], int @var{nelem}) +This function gets the 1, 5 and 15 minute load averages of the system. The +values are placed in @var{loadavg}. The function will place at most +@var{nelem} elements into the array, @var{loadavg}. Never are there more +than three elements returned and possibly less than @var{nelem}. The return +value is the number of elements written to @var{loadavg}, or -1 on error. +@end deftypefun |