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115 lines
2.3 KiB

#include <lighttpd/settings.h>
#if defined(LIGHTY_OS_LINUX)
#include <fcntl.h>
gsize li_memory_usage(void) {
/* parse /proc/self/stat */
int d;
gchar s[PATH_MAX];
gchar c;
unsigned int u;
long unsigned int lu;
long int ld;
long long unsigned int llu;
gsize rss;
FILE *f;
f = fopen("/proc/self/stat", "r");
if (!f)
return 0;
/* fields according to proc(5) */
d = fscanf(
f,
"%d %s %c %d %d %d %d %d %u %lu %lu %lu %lu %lu %lu %ld %ld %ld %ld %ld %ld %lu %lu"
" %ld %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu %lu %ld",
&d, s, &c, &d, &d, &d, &d, &d, &u, &lu, &lu, &lu, &lu, &lu, &lu, &ld, &ld, &ld, &ld, &ld, &ld, &lu, &lu,
(long int*)&rss, &lu, &lu, &lu, &lu, &lu, &lu, &lu, &lu, &lu, &lu, &lu, &lu, &lu, &d, &d, &u, &u, &llu, &lu, &ld
);
fclose(f);
/* rss is the 24th field */
if (d < 24)
return 0;
return rss * getpagesize();
}
#elif defined(LIGHTY_OS_FREEBSD)
#include <paths.h>
#include <fcntl.h>
#include <kvm.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/user.h>
gsize li_memory_usage(void) {
kvm_t *kvm;
struct kinfo_proc *ki_proc;
gint cnt;
gsize rss;
kvm = kvm_open(NULL, _PATH_DEVNULL, NULL, O_RDONLY, "kvm_open");
if (!kvm)
return 0;
ki_proc = kvm_getprocs(kvm, KERN_PROC_PID, getpid(), &cnt);
if (!ki_proc) {
kvm_close(kvm);
return 0;
}
rss = ki_proc->ki_rssize * getpagesize();
kvm_close(kvm);
return rss;
}
#elif defined(LIGHTY_OS_MACOSX)
#include <mach/task.h>
#include <mach/mach_init.h>
gsize li_memory_usage(void) {
/* info from http://miknight.blogspot.com/2005/11/resident-set-size-in-mac-os-x.html */
struct task_basic_info tbinfo;
mach_msg_type_number_t cnt = TASK_BASIC_INFO_COUNT;
if (KERN_SUCCESS != task_info(mach_task_self(), TASK_BASIC_INFO, (task_info_t) &tbinfo, &cnt))
return 0;
return tbinfo.resident_size;
}
#elif defined(LIGHTY_OS_SOLARIS)
gsize li_memory_usage(void) {
/* /proc/$pid/psinfo: http://docs.sun.com/app/docs/doc/816-5174/proc-4?l=en&a=view */
gchar path[64];
psinfo_t psinfo;
FILE *f;
sprintf(path, "/proc/%d/psinfo", getpid());
f = fopen(path, "r");
if (!f)
return 0;
if (fread(&psinfo, sizeof(psinfo_t), 1, f) != 1) {
fclose(f);
return 0;
}
return psinfo.pr_rssize * 1024;
}
#else
gsize li_memory_usage(void) {
/* unsupported OS */
return 0;
}
#endif