| 17 |
|
</refmeta> |
| 18 |
|
|
| 19 |
|
<refnamediv> |
| 20 |
+ |
<refname>sg_get_process_stats</refname> |
| 21 |
|
<refname>sg_get_process_count</refname> |
| 22 |
+ |
<refname>sg_process_compare_name</refname> |
| 23 |
+ |
<refname>sg_process_compare_pid</refname> |
| 24 |
+ |
<refname>sg_process_compare_uid</refname> |
| 25 |
+ |
<refname>sg_process_compare_gid</refname> |
| 26 |
+ |
<refname>sg_process_compare_size</refname> |
| 27 |
+ |
<refname>sg_process_compare_res</refname> |
| 28 |
+ |
<refname>sg_process_compare_cpu</refname> |
| 29 |
+ |
<refname>sg_process_compare_time</refname> |
| 30 |
|
<refpurpose>get process statistics</refpurpose> |
| 31 |
|
</refnamediv> |
| 32 |
|
|
| 34 |
|
<funcsynopsis> |
| 35 |
|
<funcsynopsisinfo>#include <statgrab.h></funcsynopsisinfo> |
| 36 |
|
<funcprototype> |
| 37 |
+ |
<funcdef>sg_process_stats *<function>sg_get_process_stats</function></funcdef> |
| 38 |
+ |
<paramdef>int *<parameter>entries</parameter></paramdef> |
| 39 |
+ |
</funcprototype> |
| 40 |
+ |
<funcprototype> |
| 41 |
|
<funcdef>sg_process_count *<function>sg_get_process_count</function></funcdef> |
| 42 |
|
<void/> |
| 43 |
|
</funcprototype> |
| 44 |
+ |
|
| 45 |
+ |
<funcprototype> |
| 46 |
+ |
<funcdef>int <function>sg_process_compare_name</function></funcdef> |
| 47 |
+ |
<paramdef>const void *<parameter>va</parameter></paramdef> |
| 48 |
+ |
<paramdef>const void *<parameter>vb</parameter></paramdef> |
| 49 |
+ |
</funcprototype> |
| 50 |
+ |
<funcprototype> |
| 51 |
+ |
<funcdef>int <function>sg_process_compare_pid</function></funcdef> |
| 52 |
+ |
<paramdef>const void *<parameter>va</parameter></paramdef> |
| 53 |
+ |
<paramdef>const void *<parameter>vb</parameter></paramdef> |
| 54 |
+ |
</funcprototype> |
| 55 |
+ |
<funcprototype> |
| 56 |
+ |
<funcdef>int <function>sg_process_compare_uid</function></funcdef> |
| 57 |
+ |
<paramdef>const void *<parameter>va</parameter></paramdef> |
| 58 |
+ |
<paramdef>const void *<parameter>vb</parameter></paramdef> |
| 59 |
+ |
</funcprototype> |
| 60 |
+ |
<funcprototype> |
| 61 |
+ |
<funcdef>int <function>sg_process_compare_gid</function></funcdef> |
| 62 |
+ |
<paramdef>const void *<parameter>va</parameter></paramdef> |
| 63 |
+ |
<paramdef>const void *<parameter>vb</parameter></paramdef> |
| 64 |
+ |
</funcprototype> |
| 65 |
+ |
<funcprototype> |
| 66 |
+ |
<funcdef>int <function>sg_process_compare_size</function></funcdef> |
| 67 |
+ |
<paramdef>const void *<parameter>va</parameter></paramdef> |
| 68 |
+ |
<paramdef>const void *<parameter>vb</parameter></paramdef> |
| 69 |
+ |
</funcprototype> |
| 70 |
+ |
<funcprototype> |
| 71 |
+ |
<funcdef>int <function>sg_process_compare_res</function></funcdef> |
| 72 |
+ |
<paramdef>const void *<parameter>va</parameter></paramdef> |
| 73 |
+ |
<paramdef>const void *<parameter>vb</parameter></paramdef> |
| 74 |
+ |
</funcprototype> |
| 75 |
+ |
<funcprototype> |
| 76 |
+ |
<funcdef>int <function>sg_process_compare_cpu</function></funcdef> |
| 77 |
+ |
<paramdef>const void *<parameter>va</parameter></paramdef> |
| 78 |
+ |
<paramdef>const void *<parameter>vb</parameter></paramdef> |
| 79 |
+ |
</funcprototype> |
| 80 |
+ |
<funcprototype> |
| 81 |
+ |
<funcdef>int <function>sg_process_compare_time</function></funcdef> |
| 82 |
+ |
<paramdef>const void *<parameter>va</parameter></paramdef> |
| 83 |
+ |
<paramdef>const void *<parameter>vb</parameter></paramdef> |
| 84 |
+ |
</funcprototype> |
| 85 |
+ |
|
| 86 |
|
</funcsynopsis> |
| 87 |
|
</refsynopsisdiv> |
| 88 |
|
|
| 89 |
|
<refsect1> |
| 90 |
|
<title>Description</title> |
| 91 |
|
<para> |
| 92 |
+ |
The <function>sg_get_process_stats</function> takes a pointer to |
| 93 |
+ |
an int, <parameter>entries</parameter>, which is filled with the |
| 94 |
+ |
number of processes the snapshot contains. The return value is a |
| 95 |
+ |
pointer to the first member of an array of |
| 96 |
+ |
<structname>sg_process_stats</structname> structures; the number |
| 97 |
+ |
of entries in the array is returned in |
| 98 |
+ |
<parameter>entries</parameter>. |
| 99 |
+ |
</para> |
| 100 |
+ |
<para> |
| 101 |
|
<function>sg_get_process_count</function> returns a pointer to a |
| 102 |
|
static buffer of type <structname>sg_process_count</structname>. |
| 103 |
|
</para> |
| 104 |
|
<para> |
| 105 |
< |
It provides information on the number of processes and the |
| 106 |
< |
system and the different states they're in. |
| 105 |
> |
These two functions provide information on the process running |
| 106 |
> |
on the system. In the first case lots of detail is provided, and |
| 107 |
> |
in the second case a summary of the states of the current processes. |
| 108 |
|
</para> |
| 109 |
+ |
<para> |
| 110 |
+ |
<simplelist type="vert"> |
| 111 |
+ |
<member><function>sg_process_compare_name</function></member> |
| 112 |
+ |
<member><function>sg_process_compare_pid</function></member> |
| 113 |
+ |
<member><function>sg_process_compare_uid</function></member> |
| 114 |
+ |
<member><function>sg_process_compare_gid</function></member> |
| 115 |
+ |
<member><function>sg_process_compare_size</function></member> |
| 116 |
+ |
<member><function>sg_process_compare_res</function></member> |
| 117 |
+ |
<member><function>sg_process_compare_cpu</function></member> |
| 118 |
+ |
<member><function>sg_process_compare_time</function></member> |
| 119 |
+ |
</simplelist> |
| 120 |
+ |
</para> |
| 121 |
+ |
<para> |
| 122 |
+ |
These functions compare two sg_process_stats entries, and return an |
| 123 |
+ |
int to represent which one is greater. The main use of these functions |
| 124 |
+ |
is to be passed to qsort to sort the sg_process_stats by the given type. |
| 125 |
+ |
</para> |
| 126 |
+ |
<para> |
| 127 |
+ |
For example: |
| 128 |
+ |
</para> |
| 129 |
+ |
<para> |
| 130 |
+ |
<function>qsort</function>(<structname>sg_process_stats</structname> ps, int ps_size, sizeof *ps, sg_process_compare_pid); |
| 131 |
+ |
</para> |
| 132 |
+ |
|
| 133 |
|
</refsect1> |
| 134 |
|
|
| 135 |
|
<refsect1> |
| 136 |
|
<title>Return Values</title> |
| 137 |
|
|
| 138 |
|
<para> |
| 139 |
< |
The structure returned is of type |
| 139 |
> |
The structure returned by sg_get_process_stats is of type |
| 140 |
> |
<structname>sg_process_stats</structname>. |
| 141 |
> |
</para> |
| 142 |
> |
|
| 143 |
> |
<programlisting> |
| 144 |
> |
typedef struct { |
| 145 |
> |
char *process_name; |
| 146 |
> |
char *proctitle; |
| 147 |
> |
|
| 148 |
> |
pid_t pid; |
| 149 |
> |
pid_t parent; /* Parent pid */ |
| 150 |
> |
pid_t pgid; /* process id of process group leader */ |
| 151 |
> |
|
| 152 |
> |
uid_t uid; |
| 153 |
> |
uid_t euid; |
| 154 |
> |
gid_t gid; |
| 155 |
> |
gid_t egid; |
| 156 |
> |
|
| 157 |
> |
unsigned long long proc_size; /* in bytes */ |
| 158 |
> |
unsigned long long proc_resident; /* in bytes */ |
| 159 |
> |
time_t time_spent; /* time running in seconds */ |
| 160 |
> |
double cpu_percent; |
| 161 |
> |
int nice; |
| 162 |
> |
sg_process_state state; |
| 163 |
> |
} sg_process_stats; |
| 164 |
> |
</programlisting> |
| 165 |
> |
|
| 166 |
> |
<programlisting> |
| 167 |
> |
typedef enum { |
| 168 |
> |
SG_PROCESS_STATE_RUNNING, |
| 169 |
> |
SG_PROCESS_STATE_SLEEPING, |
| 170 |
> |
SG_PROCESS_STATE_STOPPED, |
| 171 |
> |
SG_PROCESS_STATE_ZOMBIE, |
| 172 |
> |
SG_PROCESS_STATE_UNKNOWN |
| 173 |
> |
} sg_process_state; |
| 174 |
> |
</programlisting> |
| 175 |
> |
|
| 176 |
> |
<variablelist> |
| 177 |
> |
<varlistentry> |
| 178 |
> |
<term><structfield>process_name</structfield></term> |
| 179 |
> |
<listitem> |
| 180 |
> |
<para> |
| 181 |
> |
The name of the command that was run. |
| 182 |
> |
</para> |
| 183 |
> |
</listitem> |
| 184 |
> |
</varlistentry> |
| 185 |
> |
<varlistentry> |
| 186 |
> |
<term><structfield>proctitle</structfield></term> |
| 187 |
> |
<listitem> |
| 188 |
> |
<para> |
| 189 |
> |
The command line (the "title") of the process. Take |
| 190 |
> |
note - this can be modified by the process, so isn't |
| 191 |
> |
guaranteed to be the original command line. |
| 192 |
> |
</para> |
| 193 |
> |
</listitem> |
| 194 |
> |
</varlistentry> |
| 195 |
> |
<varlistentry> |
| 196 |
> |
<term><structfield>pid</structfield></term> |
| 197 |
> |
<listitem> |
| 198 |
> |
<para> |
| 199 |
> |
The process ID. |
| 200 |
> |
</para> |
| 201 |
> |
</listitem> |
| 202 |
> |
</varlistentry> |
| 203 |
> |
<varlistentry> |
| 204 |
> |
<term><structfield>parent</structfield></term> |
| 205 |
> |
<listitem> |
| 206 |
> |
<para> |
| 207 |
> |
The parent process ID. |
| 208 |
> |
</para> |
| 209 |
> |
</listitem> |
| 210 |
> |
</varlistentry> |
| 211 |
> |
<varlistentry> |
| 212 |
> |
<term><structfield>pgid</structfield></term> |
| 213 |
> |
<listitem> |
| 214 |
> |
<para> |
| 215 |
> |
The process ID of the process group leader. |
| 216 |
> |
</para> |
| 217 |
> |
</listitem> |
| 218 |
> |
</varlistentry> |
| 219 |
> |
<varlistentry> |
| 220 |
> |
<term><structfield>uid</structfield></term> |
| 221 |
> |
<listitem> |
| 222 |
> |
<para> |
| 223 |
> |
The UID the process is running as. |
| 224 |
> |
</para> |
| 225 |
> |
</listitem> |
| 226 |
> |
</varlistentry> |
| 227 |
> |
<varlistentry> |
| 228 |
> |
<term><structfield>euid</structfield></term> |
| 229 |
> |
<listitem> |
| 230 |
> |
<para> |
| 231 |
> |
The effective UID the process is running as. |
| 232 |
> |
</para> |
| 233 |
> |
</listitem> |
| 234 |
> |
</varlistentry> |
| 235 |
> |
<varlistentry> |
| 236 |
> |
<term><structfield>gid</structfield></term> |
| 237 |
> |
<listitem> |
| 238 |
> |
<para> |
| 239 |
> |
The GID the process is running as. |
| 240 |
> |
</para> |
| 241 |
> |
</listitem> |
| 242 |
> |
</varlistentry> |
| 243 |
> |
<varlistentry> |
| 244 |
> |
<term><structfield>egid</structfield></term> |
| 245 |
> |
<listitem> |
| 246 |
> |
<para> |
| 247 |
> |
The effective GID the process is running as. |
| 248 |
> |
</para> |
| 249 |
> |
</listitem> |
| 250 |
> |
</varlistentry> |
| 251 |
> |
<varlistentry> |
| 252 |
> |
<term><structfield>proc_size</structfield></term> |
| 253 |
> |
<listitem> |
| 254 |
> |
<para> |
| 255 |
> |
The size of the process in bytes. |
| 256 |
> |
</para> |
| 257 |
> |
</listitem> |
| 258 |
> |
</varlistentry> |
| 259 |
> |
<varlistentry> |
| 260 |
> |
<term><structfield>proc_resident</structfield></term> |
| 261 |
> |
<listitem> |
| 262 |
> |
<para> |
| 263 |
> |
The size of the process that's resident in memory. |
| 264 |
> |
</para> |
| 265 |
> |
</listitem> |
| 266 |
> |
</varlistentry> |
| 267 |
> |
<varlistentry> |
| 268 |
> |
<term><structfield>time_spent</structfield></term> |
| 269 |
> |
<listitem> |
| 270 |
> |
<para> |
| 271 |
> |
The number of seconds the process has been running. |
| 272 |
> |
</para> |
| 273 |
> |
</listitem> |
| 274 |
> |
</varlistentry> |
| 275 |
> |
<varlistentry> |
| 276 |
> |
<term><structfield>cpu_percent</structfield></term> |
| 277 |
> |
<listitem> |
| 278 |
> |
<para> |
| 279 |
> |
The current percentage of CPU the process is using. |
| 280 |
> |
</para> |
| 281 |
> |
</listitem> |
| 282 |
> |
</varlistentry> |
| 283 |
> |
<varlistentry> |
| 284 |
> |
<term><structfield>nice</structfield></term> |
| 285 |
> |
<listitem> |
| 286 |
> |
<para> |
| 287 |
> |
The nice value of the process. |
| 288 |
> |
</para> |
| 289 |
> |
</listitem> |
| 290 |
> |
</varlistentry> |
| 291 |
> |
<varlistentry> |
| 292 |
> |
<term><structfield>state</structfield></term> |
| 293 |
> |
<listitem> |
| 294 |
> |
<para> |
| 295 |
> |
The current state of the process. See sg_process_state |
| 296 |
> |
for permitted values. |
| 297 |
> |
</para> |
| 298 |
> |
</listitem> |
| 299 |
> |
</varlistentry> |
| 300 |
> |
</variablelist> |
| 301 |
> |
|
| 302 |
> |
<para> |
| 303 |
> |
The structure returned by sg_get_process_count is of type |
| 304 |
|
<structname>sg_process_count</structname>. |
| 305 |
|
</para> |
| 306 |
|
|
