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#include "node.h"
#include "platform.h"
#include <sys/param.h> // for MAXPATHLEN
#include <unistd.h> // getpagesize
/* SetProcessTitle */
#include <sys/prctl.h>
#include <linux/prctl.h>
#include <stdlib.h> // free
#include <string.h> // strdup
namespace node {
static char buf[MAXPATHLEN + 1];
static char *process_title;
char** OS::SetupArgs(int argc, char *argv[]) {
process_title = strdup(argv[0]);
return argv;
}
void OS::SetProcessTitle(char *title) {
if (process_title) free(process_title);
process_title = strdup(title);
prctl(PR_SET_NAME, process_title);
}
const char* OS::GetProcessTitle(int *len) {
if (process_title) {
*len = strlen(process_title);
return process_title;
}
*len = 0;
return NULL;
}
int OS::GetMemory(size_t *rss, size_t *vsize) {
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] */
*vsize = (size_t) itmp;
/* 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 OS::GetExecutablePath(char* buffer, size_t* size) {
*size = readlink("/proc/self/exe", buffer, *size - 1);
if (*size <= 0) return -1;
buffer[*size] = '\0';
return 0;
}
} // namespace node
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