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// SPDX-License-Identifier: GPL-3.0-or-later
#include "os.h"
// ----------------------------------------------------------------------------
// system functions
// to retrieve settings of the system
int processors = 1;
long get_system_cpus(void) {
processors = 1;
#ifdef __APPLE__
int32_t tmp_processors;
if (unlikely(GETSYSCTL_BY_NAME("hw.logicalcpu", tmp_processors))) {
error("Assuming system has %d processors.", processors);
} else {
processors = tmp_processors;
}
return processors;
#elif __FreeBSD__
int32_t tmp_processors;
if (unlikely(GETSYSCTL_BY_NAME("hw.ncpu", tmp_processors))) {
error("Assuming system has %d processors.", processors);
} else {
processors = tmp_processors;
}
return processors;
#else
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "%s/proc/stat", netdata_configured_host_prefix);
procfile *ff = procfile_open(filename, NULL, PROCFILE_FLAG_DEFAULT);
if(!ff) {
error("Cannot open file '%s'. Assuming system has %d processors.", filename, processors);
return processors;
}
ff = procfile_readall(ff);
if(!ff) {
error("Cannot open file '%s'. Assuming system has %d processors.", filename, processors);
return processors;
}
processors = 0;
unsigned int i;
for(i = 0; i < procfile_lines(ff); i++) {
if(!procfile_linewords(ff, i)) continue;
if(strncmp(procfile_lineword(ff, i, 0), "cpu", 3) == 0) processors++;
}
processors--;
if(processors < 1) processors = 1;
procfile_close(ff);
debug(D_SYSTEM, "System has %d processors.", processors);
return processors;
#endif /* __APPLE__, __FreeBSD__ */
}
pid_t pid_max = 32768;
pid_t get_system_pid_max(void) {
#ifdef __APPLE__
// As we currently do not know a solution to query pid_max from the os
// we use the number defined in bsd/sys/proc_internal.h in XNU sources
pid_max = 99999;
return pid_max;
#elif __FreeBSD__
int32_t tmp_pid_max;
if (unlikely(GETSYSCTL_BY_NAME("kern.pid_max", tmp_pid_max))) {
pid_max = 99999;
error("Assuming system's maximum pid is %d.", pid_max);
} else {
pid_max = tmp_pid_max;
}
return pid_max;
#else
static char read = 0;
if(unlikely(read)) return pid_max;
read = 1;
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "%s/proc/sys/kernel/pid_max", netdata_configured_host_prefix);
unsigned long long max = 0;
if(read_single_number_file(filename, &max) != 0) {
error("Cannot open file '%s'. Assuming system supports %d pids.", filename, pid_max);
return pid_max;
}
if(!max) {
error("Cannot parse file '%s'. Assuming system supports %d pids.", filename, pid_max);
return pid_max;
}
pid_max = (pid_t) max;
return pid_max;
#endif /* __APPLE__, __FreeBSD__ */
}
unsigned int system_hz;
void get_system_HZ(void) {
long ticks;
if ((ticks = sysconf(_SC_CLK_TCK)) == -1) {
error("Cannot get system clock ticks");
}
system_hz = (unsigned int) ticks;
}
// =====================================================================================================================
// FreeBSD
#if (TARGET_OS == OS_FREEBSD)
int getsysctl_by_name(const char *name, void *ptr, size_t len) {
size_t nlen = len;
if (unlikely(sysctlbyname(name, ptr, &nlen, NULL, 0) == -1)) {
error("FREEBSD: sysctl(%s...) failed: %s", name, strerror(errno));
return 1;
}
if (unlikely(nlen != len)) {
error("FREEBSD: sysctl(%s...) expected %lu, got %lu", name, (unsigned long)len, (unsigned long)nlen);
return 1;
}
return 0;
}
int getsysctl_simple(const char *name, int *mib, size_t miblen, void *ptr, size_t len) {
size_t nlen = len;
if (unlikely(!mib[0]))
if (unlikely(getsysctl_mib(name, mib, miblen)))
return 1;
if (unlikely(sysctl(mib, miblen, ptr, &nlen, NULL, 0) == -1)) {
error("FREEBSD: sysctl(%s...) failed: %s", name, strerror(errno));
return 1;
}
if (unlikely(nlen != len)) {
error("FREEBSD: sysctl(%s...) expected %lu, got %lu", name, (unsigned long)len, (unsigned long)nlen);
return 1;
}
return 0;
}
int getsysctl(const char *name, int *mib, size_t miblen, void *ptr, size_t *len) {
size_t nlen = *len;
if (unlikely(!mib[0]))
if (unlikely(getsysctl_mib(name, mib, miblen)))
return 1;
if (unlikely(sysctl(mib, miblen, ptr, len, NULL, 0) == -1)) {
error("FREEBSD: sysctl(%s...) failed: %s", name, strerror(errno));
return 1;
}
if (unlikely(ptr != NULL && nlen != *len)) {
error("FREEBSD: sysctl(%s...) expected %lu, got %lu", name, (unsigned long)*len, (unsigned long)nlen);
return 1;
}
return 0;
}
int getsysctl_mib(const char *name, int *mib, size_t len) {
size_t nlen = len;
if (unlikely(sysctlnametomib(name, mib, &nlen) == -1)) {
error("FREEBSD: sysctl(%s...) failed: %s", name, strerror(errno));
return 1;
}
if (unlikely(nlen != len)) {
error("FREEBSD: sysctl(%s...) expected %lu, got %lu", name, (unsigned long)len, (unsigned long)nlen);
return 1;
}
return 0;
}
#endif
// =====================================================================================================================
// MacOS
#if (TARGET_OS == OS_MACOS)
int getsysctl_by_name(const char *name, void *ptr, size_t len) {
size_t nlen = len;
if (unlikely(sysctlbyname(name, ptr, &nlen, NULL, 0) == -1)) {
error("MACOS: sysctl(%s...) failed: %s", name, strerror(errno));
return 1;
}
if (unlikely(nlen != len)) {
error("MACOS: sysctl(%s...) expected %lu, got %lu", name, (unsigned long)len, (unsigned long)nlen);
return 1;
}
return 0;
}
#endif // (TARGET_OS == OS_MACOS)
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