diff options
author | Costa Tsaousis <costa@tsaousis.gr> | 2018-10-15 23:16:42 +0300 |
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committer | GitHub <noreply@github.com> | 2018-10-15 23:16:42 +0300 |
commit | 8fbf817ef83b3524b15f908251909d9d6feb5532 (patch) | |
tree | 4c2d417b7392c907bbdbe355b8db361bd3741a02 /libnetdata/os.c | |
parent | 1ad4f1bcfc691120102b57dbd426de0870abd76f (diff) |
modularized all source code (#4391)
* modularized all external plugins
* added README.md in plugins
* fixed title
* fixed typo
* relative link to external plugins
* external plugins configuration README
* added plugins link
* remove plugins link
* plugin names are links
* added links to external plugins
* removed unecessary spacing
* list to table
* added language
* fixed typo
* list to table on internal plugins
* added more documentation to internal plugins
* moved python, node, and bash code and configs into the external plugins
* added statsd README
* fix bug with corrupting config.h every 2nd compilation
* moved all config files together with their code
* more documentation
* diskspace info
* fixed broken links in apps.plugin
* added backends docs
* updated plugins readme
* move nc-backend.sh to backends
* created daemon directory
* moved all code outside src/
* fixed readme identation
* renamed plugins.d.plugin to plugins.d
* updated readme
* removed linux- from linux plugins
* updated readme
* updated readme
* updated readme
* updated readme
* updated readme
* updated readme
* fixed README.md links
* fixed netdata tree links
* updated codacy, codeclimate and lgtm excluded paths
* update CMakeLists.txt
* updated automake options at top directory
* libnetdata slit into directories
* updated READMEs
* updated READMEs
* updated ARL docs
* updated ARL docs
* moved /plugins to /collectors
* moved all external plugins outside plugins.d
* updated codacy, codeclimate, lgtm
* updated README
* updated url
* updated readme
* updated readme
* updated readme
* updated readme
* moved api and web into webserver
* web/api web/gui web/server
* modularized webserver
* removed web/gui/version.txt
Diffstat (limited to 'libnetdata/os.c')
-rw-r--r-- | libnetdata/os.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/libnetdata/os.c b/libnetdata/os.c new file mode 100644 index 0000000000..0248eb627c --- /dev/null +++ b/libnetdata/os.c @@ -0,0 +1,218 @@ +// 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) + |