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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" |
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> |
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<refentry id="get_process_stats"> |
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<refentry id="sg_get_process_stats"> |
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<refentryinfo> |
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<date>$Date$</date> |
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<releaseinfo>$Id$</releaseinfo> |
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</refentryinfo> |
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<refmeta> |
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<refentrytitle>get_process_stats</refentrytitle> |
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<refentrytitle>sg_get_process_stats</refentrytitle> |
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<manvolnum>3</manvolnum> |
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<refmiscinfo>i-scream</refmiscinfo> |
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</refmeta> |
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<refnamediv> |
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<refname>get_process_stats</refname> |
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<refname>sg_get_process_stats</refname> |
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<refname>sg_get_process_count</refname> |
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<refpurpose>get process statistics</refpurpose> |
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</refnamediv> |
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<refsynopsisdiv> |
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<funcsynopsis> |
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<funcsynopsisinfo>#include <statgrab.h></funcsynopsisinfo> |
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<funcprototype> |
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<funcdef>process_stat_t *<function>get_process_stats</function></funcdef> |
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<funcdef>sg_process_stats *<function>sg_get_process_stats</function></funcdef> |
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<paramdef>int *<parameter>entries</parameter></paramdef> |
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</funcprototype> |
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<funcprototype> |
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<funcdef>sg_process_count *<function>sg_get_process_count</function></funcdef> |
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<void/> |
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</funcprototype> |
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</funcsynopsis> |
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</refsynopsisdiv> |
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<refsect1> |
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<title>Description</title> |
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<para> |
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<function>get_process_stats</function> returns a pointer to a |
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static buffer of type <structname>process_stat_t</structname>. |
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The <function>sg_get_process_stats</function> takes a pointer to |
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an int, <parameter>entries</parameter>, which is filled with the |
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number of processes the snapshot contains. A pointer to the first |
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entry, of type <structname>sg_process_stats</structname> is |
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returned, and <parameter>entries</parameter> can be used to iterate |
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through to the last entry. |
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</para> |
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<para> |
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It provides information on the number of processes and the |
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system and the different states they're in. |
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<function>sg_get_process_count</function> returns a pointer to a |
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static buffer of type <structname>sg_process_count</structname>. |
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</para> |
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<para> |
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These two functions provide information on the process running |
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on the system. In the first case lots of detail is provided, and |
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in the second case a summary of the states of the current processes. |
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</para> |
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</refsect1> |
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<refsect1> |
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<title>Return Values</title> |
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<para> |
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The structure returned is of type |
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<structname>process_stat_t</structname>. |
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The structure returned by sg_get_process_stats is of type |
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<structname>sg_process_stats</structname>. |
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</para> |
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<programlisting> |
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typedef struct { |
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char *process_name; |
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char *proctitle; |
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|
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pid_t pid; |
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pid_t parent; /* Parent pid */ |
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pid_t pgid; /* process id of process group leader */ |
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|
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uid_t uid; |
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uid_t euid; |
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gid_t gid; |
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gid_t egid; |
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|
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unsigned long long proc_size; /* in bytes */ |
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unsigned long long proc_resident; /* in bytes */ |
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time_t time_spent; /* time running in seconds */ |
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double cpu_percent; |
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int nice; |
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sg_process_state state; |
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} sg_process_stats; |
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</programlisting> |
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<programlisting> |
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typedef enum { |
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SG_PROCESS_STATE_RUNNING, |
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SG_PROCESS_STATE_SLEEPING, |
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SG_PROCESS_STATE_STOPPED, |
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SG_PROCESS_STATE_ZOMBIE, |
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SG_PROCESS_STATE_UNKNOWN |
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} sg_process_state; |
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</programlisting> |
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|
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<variablelist> |
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<varlistentry> |
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<term><structfield>process_name</structfield></term> |
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<listitem> |
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<para> |
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The name of the command that was run. |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term><structfield>proctitle</structfield></term> |
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<listitem> |
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<para> |
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The command line (the "title") of the process. Take |
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note - this can be modified by the process, so isn't |
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guaranteed to be the original command line. |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term><structfield>pid</structfield></term> |
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<listitem> |
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<para> |
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The process ID. |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term><structfield>parent</structfield></term> |
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<listitem> |
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<para> |
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The parent process ID. |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term><structfield>pgid</structfield></term> |
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<listitem> |
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<para> |
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The process ID of the process group leader. |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term><structfield>uid</structfield></term> |
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<listitem> |
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<para> |
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The UID the process is running as. |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term><structfield>euid</structfield></term> |
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<listitem> |
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<para> |
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The effective UID the process is running as. |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term><structfield>gid</structfield></term> |
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<listitem> |
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<para> |
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The GID the process is running as. |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term><structfield>egid</structfield></term> |
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<listitem> |
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<para> |
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The effective GID the process is running as. |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term><structfield>proc_size</structfield></term> |
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<listitem> |
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<para> |
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The size of the process in bytes. |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term><structfield>proc_resident</structfield></term> |
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<listitem> |
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<para> |
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The size of the process that's resident in memory. |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term><structfield>time_spent</structfield></term> |
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<listitem> |
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<para> |
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The number of seconds the process has been running. |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term><structfield>cpu_percent</structfield></term> |
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<listitem> |
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<para> |
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The current percentage of CPU the process is using. |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term><structfield>nice</structfield></term> |
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<listitem> |
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<para> |
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The nice value of the process. |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term><structfield>state</structfield></term> |
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<listitem> |
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<para> |
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The current state of the process. See sg_process_state |
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for permitted values. |
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</para> |
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</listitem> |
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</varlistentry> |
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</variablelist> |
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<para> |
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The structure returned by sg_get_process_count is of type |
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<structname>sg_process_count</structname>. |
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</para> |
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<programlisting> |
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typedef struct{ |
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int total; |
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int running; |
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int sleeping; |
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int stopped; |
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int zombie; |
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}process_stat_t; |
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}sg_process_count; |
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</programlisting> |
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<variablelist> |
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</member> |
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</simplelist> |
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</refsect1> |
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<refsect1> |
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<title>Website</title> |
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<simplelist type="vert"> |
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<member> |
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<ulink url="http://www.i-scream.org">http://www.i-scream.org</ulink> |
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<ulink url="http://www.i-scream.org/libstatgrab/"> |
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http://www.i-scream.org/libstatgrab/ |
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</ulink> |
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</member> |
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</simplelist> |
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</refsect1> |
