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46 .TH RESOURCE.H 3HEAD "Sep 10, 2004"
48 resource.h, resource \- definitions for resource operations
52 #include <\fBsys/resource.h\fR>
58 The <\fBsys/resource.h\fR> header defines the symbolic constants listed below
59 as possible values of the \fIwhich\fR argument of \fBgetpriority()\fR and
60 \fBsetpriority()\fR. See \fBgetpriority\fR(3C).
64 \fB\fBPRIO_PROCESS\fR\fR
67 identifies the \fIwho\fR argument as a process ID
76 identifies the \fIwho\fR argument as a process group ID
85 identifies the \fIwho\fR argument as a user ID
90 The following type is defined through \fBtypedef\fR:
97 unsigned integer type used for limit values
102 The following symbolic constants are defined:
106 \fB\fBRLIM_INFINITY\fR\fR
109 a value of \fBrlim_t\fR indicating no limit
115 \fB\fBRLIM_SAVED_MAX\fR\fR
118 a value of type \fBrlim_t\fR indicating an unrepresentable saved hard limit
124 \fB\fBRLIM_SAVED_CUR\fR\fR
127 a value of type \fBrlim_t\fR indicating an unrepresentable saved soft limit
132 The symbolic constants listed below are defined as possible values of the
133 \fIwho\fR parameter of \fBgetrusage()\fR. See \fBgetrusage\fR(3C).
137 \fB\fBRUSAGE_SELF\fR\fR
140 returns information about the current process
146 \fB\fBRUSAGE_CHILDREN\fR\fR
149 returns information about children of the current process
154 The <\fBsys/resource.h\fR> header defines the \fBrlimit\fR structure, which
155 includes the following members:
159 rlim_t rlim_cur /* the current (soft) limit */
160 rlim_t rlim_max /* the hard limit */
166 The <\fBsys/resource.h\fR> header defines the \fBrusage\fR structure, which
167 includes the following members:
171 struct timeval ru_utime /* user time used */
172 struct timeval ru_stime /* system time used */
178 The \fBtimeval\fR structure is defined as described in <\fBsys/time.h\fR>.
181 The symbolic constants listed below are defined as possible values for the
182 \fIresource\fR argument of \fBgetrlimit()\fR and \fBsetrlimit()\fR. See
187 \fB\fBRLIMIT_CORE\fR\fR
190 limit on size of core dump file
196 \fB\fBRLIMIT_CPU\fR\fR
199 limit on CPU time per process
205 \fB\fBRLIMIT_DATA\fR\fR
208 limit on data segment size
214 \fB\fBRLIMIT_FSIZE\fR\fR
223 \fB\fBRLIMIT_NOFILE\fR\fR
226 limit on number of open files
232 \fB\fBRLIMIT_STACK\fR\fR
241 \fB\fBRLIMIT_AS\fR\fR
244 limit on address space size
249 The \fBid_t\fR type is defined through \fBtypedef\fR as described in
250 <\fBsys/types.h\fR>. See \fBtypes.h\fR(3HEAD).
253 Inclusion of the <\fBsys/resource.h\fR> header can also make visible all
254 symbols from <\fBsys/time.h\fR>. See \fBtime.h\fR(3HEAD).
258 See \fBattributes\fR(5) for descriptions of the following attributes:
266 ATTRIBUTE TYPE ATTRIBUTE VALUE
268 Interface Stability Standard
274 \fBgetrlimit\fR(2), \fBgetpriority\fR(3C), \fBtime.h\fR(3HEAD),
275 \fBtypes.h\fR(3HEAD), \fBattributes\fR(5), \fBstandards\fR(5)