node/src/platform_linux.cc at master · devdazed/node · GitHub

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// Copyright Joyent, Inc. and other Node contributors.

// Permission is hereby granted, free of charge, to any person obtaining a

// copy of this software and associated documentation files (the

// "Software"), to deal in the Software without restriction, including

// without limitation the rights to use, copy, modify, merge, publish,

// distribute, sublicense, and/or sell copies of the Software, and to permit

// persons to whom the Software is furnished to do so, subject to the

// following conditions:

// The above copyright notice and this permission notice shall be included

// in all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN

// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,

// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR

// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE

// USE OR OTHER DEALINGS IN THE SOFTWARE.

#include "node.h"

#include "platform.h"

#include <v8.h>

#include <sys/param.h> // for MAXPATHLEN

#include <unistd.h> // getpagesize, sysconf

#include <stdio.h> // sscanf, snprintf

/* SetProcessTitle */

#include <sys/prctl.h>

#include <linux/prctl.h>

#include <stdlib.h> // free

#include <string.h> // strdup

/* GetInterfaceAddresses */

#include <arpa/inet.h>

#include <sys/types.h>

#include <ifaddrs.h>

#include <errno.h>

#include <sys/ioctl.h>

#include <net/if.h>

#include <time.h>

#ifndef CLOCK_MONOTONIC

# include <sys/sysinfo.h>

#endif

extern char **environ;

namespace node {

using namespace v8;

static char buf[MAXPATHLEN + 1];

double Platform::prog_start_time = Platform::GetUptime();

static struct {

char *str;

size_t len;

} process_title;

char** Platform::SetupArgs(int argc, char *argv[]) {

char **new_argv;

char **new_env;

size_t size;

int envc;

char *s;

int i;

for (envc = 0; environ[envc]; envc++);

s = envc ? environ[envc - 1] : argv[argc - 1];

process_title.str = argv[0];

process_title.len = s + strlen(s) + 1 - argv[0];

size = process_title.len;

size += (argc + 1) * sizeof(char **);

size += (envc + 1) * sizeof(char **);

if ((s = (char *) malloc(size)) == NULL) {

process_title.str = NULL;

process_title.len = 0;

return argv;

}

new_argv = (char **) s;

new_env = new_argv + argc + 1;

s = (char *) (new_env + envc + 1);

memcpy(s, process_title.str, process_title.len);

for (i = 0; i < argc; i++)

new_argv[i] = s + (argv[i] - argv[0]);

new_argv[argc] = NULL;

s += environ[0] - argv[0];

for (i = 0; i < envc; i++)

new_env[i] = s + (environ[i] - environ[0]);

new_env[envc] = NULL;

environ = new_env;

return new_argv;

}

void Platform::SetProcessTitle(char *title) {

/* No need to terminate, last char is always '\0'. */

if (process_title.len)

strncpy(process_title.str, title, process_title.len - 1);

}

const char* Platform::GetProcessTitle(int *len) {

if (process_title.str) {

*len = strlen(process_title.str);

return process_title.str;

}

else {

*len = 0;

return NULL;

}

int Platform::GetMemory(size_t *rss) {

FILE *f = fopen("/proc/self/stat", "r");

if (!f) return -1;

int itmp;

char ctmp;

size_t page_size = getpagesize();

char *cbuf;

bool foundExeEnd;

/* PID */

if (fscanf(f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* Exec file */

cbuf = buf;

foundExeEnd = false;

if (fscanf (f, "%c", cbuf++) == 0) goto error; // (

while (1) {

if (fscanf(f, "%c", cbuf) == 0) goto error;

if (*cbuf == ')') {

foundExeEnd = true;

} else if (foundExeEnd && *cbuf == ' ') {

*cbuf = 0;

break;

}

cbuf++;

}

/* State */

if (fscanf (f, "%c ", &ctmp) == 0) goto error; /* coverity[secure_coding] */

/* Parent process */

if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* Process group */

if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* Session id */

if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* TTY */

if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* TTY owner process group */

if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* Flags */

if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* Minor faults (no memory page) */

if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* Minor faults, children */

if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* Major faults (memory page faults) */

if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* Major faults, children */

if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* utime */

if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* stime */

if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* utime, children */

if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* stime, children */

if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* jiffies remaining in current time slice */

if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* 'nice' value */

if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* jiffies until next timeout */

if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* jiffies until next SIGALRM */

if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* start time (jiffies since system boot) */

if (fscanf (f, "%d ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* Virtual memory size */

if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* Resident set size */

if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */

*rss = (size_t) itmp * page_size;

/* rlim */

if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* Start of text */

if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* End of text */

if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */

/* Start of stack */

if (fscanf (f, "%u ", &itmp) == 0) goto error; /* coverity[secure_coding] */

fclose (f);

return 0;

error:

fclose (f);

return -1;

}

int Platform::GetCPUInfo(Local<Array> *cpus) {

HandleScope scope;

Local<Object> cpuinfo;

Local<Object> cputimes;

unsigned int ticks = (unsigned int)sysconf(_SC_CLK_TCK),

multiplier = ((uint64_t)1000L / ticks), cpuspeed;

int numcpus = 0, i = 0;

unsigned long long ticks_user, ticks_sys, ticks_idle, ticks_nice, ticks_intr;

char line[512], speedPath[256], model[512];

FILE *fpStat = fopen("/proc/stat", "r");

FILE *fpModel = fopen("/proc/cpuinfo", "r");

FILE *fpSpeed;

if (fpModel) {

while (fgets(line, 511, fpModel) != NULL) {

if (strncmp(line, "model name", 10) == 0) {

numcpus++;

if (numcpus == 1) {

char *p = strchr(line, ':') + 2;

strcpy(model, p);

model[strlen(model)-1] = 0;

}

} else if (strncmp(line, "cpu MHz", 7) == 0) {

if (numcpus == 1) {

sscanf(line, "%*s %*s : %u", &cpuspeed);

}

fclose(fpModel);

}

*cpus = Array::New(numcpus);

if (fpStat) {

while (fgets(line, 511, fpStat) != NULL) {

if (strncmp(line, "cpu ", 4) == 0) {

continue;

} else if (strncmp(line, "cpu", 3) != 0) {

break;

}

sscanf(line, "%*s %llu %llu %llu %llu %*llu %llu",

&ticks_user, &ticks_nice, &ticks_sys, &ticks_idle, &ticks_intr);

snprintf(speedPath, sizeof(speedPath),

"/sys/devices/system/cpu/cpu%u/cpufreq/cpuinfo_max_freq", i);

fpSpeed = fopen(speedPath, "r");

if (fpSpeed) {

if (fgets(line, 511, fpSpeed) != NULL) {

sscanf(line, "%u", &cpuspeed);

cpuspeed /= 1000;

}

fclose(fpSpeed);

}

cpuinfo = Object::New();

cputimes = Object::New();

cputimes->Set(String::New("user"), Number::New(ticks_user * multiplier));

cputimes->Set(String::New("nice"), Number::New(ticks_nice * multiplier));

cputimes->Set(String::New("sys"), Number::New(ticks_sys * multiplier));

cputimes->Set(String::New("idle"), Number::New(ticks_idle * multiplier));

cputimes->Set(String::New("irq"), Number::New(ticks_intr * multiplier));

cpuinfo->Set(String::New("model"), String::New(model));

cpuinfo->Set(String::New("speed"), Number::New(cpuspeed));

cpuinfo->Set(String::New("times"), cputimes);

(*cpus)->Set(i++, cpuinfo);

}

fclose(fpStat);

}

return 0;

}

double Platform::GetUptimeImpl() {

#ifdef CLOCK_MONOTONIC

struct timespec now;

if (0 == clock_gettime(CLOCK_MONOTONIC, &now)) {

double uptime = now.tv_sec;

uptime += (double)now.tv_nsec / 1000000000.0;

return uptime;

}

return -1;

#else

struct sysinfo info;

if (sysinfo(&info) < 0) {

return -1;

}

return static_cast<double>(info.uptime);

#endif

}

bool IsInternal(struct ifaddrs* addr) {

return addr->ifa_flags & IFF_UP &&

addr->ifa_flags & IFF_RUNNING &&

addr->ifa_flags & IFF_LOOPBACK;

}

Handle<Value> Platform::GetInterfaceAddresses() {

HandleScope scope;

struct ::ifaddrs *addrs, *ent;

struct ::sockaddr_in *in4;

struct ::sockaddr_in6 *in6;

char ip[INET6_ADDRSTRLEN];

Local<Object> ret, o;

Local<String> name, ipaddr, family;

Local<Array> ifarr;

if (getifaddrs(&addrs) != 0) {

return ThrowException(ErrnoException(errno, "getifaddrs"));

}

ret = Object::New();

for (ent = addrs; ent != NULL; ent = ent->ifa_next) {

bzero(&ip, sizeof (ip));

if (!(ent->ifa_flags & IFF_UP && ent->ifa_flags & IFF_RUNNING)) {

continue;

}

if (ent->ifa_addr == NULL) {

continue;

}

* On Linux getifaddrs returns information related to the raw underlying

* devices. We're not interested in this information.

if (ent->ifa_addr->sa_family == PF_PACKET)

continue;

name = String::New(ent->ifa_name);

if (ret->Has(name)) {

ifarr = Local<Array>::Cast(ret->Get(name));

} else {

ifarr = Array::New();

ret->Set(name, ifarr);

}

if (ent->ifa_addr->sa_family == AF_INET6) {

in6 = (struct sockaddr_in6 *)ent->ifa_addr;

inet_ntop(AF_INET6, &(in6->sin6_addr), ip, INET6_ADDRSTRLEN);

family = String::New("IPv6");

} else if (ent->ifa_addr->sa_family == AF_INET) {

in4 = (struct sockaddr_in *)ent->ifa_addr;

inet_ntop(AF_INET, &(in4->sin_addr), ip, INET6_ADDRSTRLEN);

family = String::New("IPv4");

} else {

(void) strncpy(ip, "<unknown sa family>", INET6_ADDRSTRLEN);

family = String::New("<unknown>");

}

o = Object::New();

o->Set(String::New("address"), String::New(ip));

o->Set(String::New("family"), family);

o->Set(String::New("internal"), ent->ifa_flags & IFF_LOOPBACK ?

True() : False());

ifarr->Set(ifarr->Length(), o);

}

freeifaddrs(addrs);

return scope.Close(ret);

}

} // namespace node

node/src/platform_linux.cc at master · devdazed/node · GitHub

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