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#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "debug.h"
#include "pids.h"
#include "random.h"
#include "shm.h"
#include "utils.h"
/*
* Use this allocator if you have an object a child writes to that you want
* all other processes to see.
*/
void * alloc_shared(unsigned int size)
{
void *ret;
ret = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_SHARED, -1, 0);
if (ret == MAP_FAILED) {
printf("mmap %u failure\n", size);
exit(EXIT_FAILURE);
}
/* poison, to force users to set it to something sensible. */
memset(ret, rnd(), size);
return ret;
}
void * __zmalloc(size_t size, const char *func)
{
void *p;
p = malloc(size);
if (p == NULL) {
/* Maybe we mlockall'd everything. Try and undo that, and retry. */
munlockall();
p = malloc(size);
if (p != NULL)
goto done;
printf("%s: malloc(%zu) failure.\n", func, size);
exit(EXIT_FAILURE);
}
done:
memset(p, 0, size);
return p;
}
void sizeunit(unsigned long size, char *buf)
{
/* non kilobyte aligned size? */
if (size & 1023) {
sprintf(buf, "%lu bytes", size);
return;
}
/* < 1MB ? */
if (size < (1024 * 1024)) {
sprintf(buf, "%luKB", size / 1024);
return;
}
/* < 1GB ? */
if (size < (1024 * 1024 * 1024)) {
sprintf(buf, "%ldMB", (size / 1024) / 1024);
return;
}
sprintf(buf, "%ldGB", ((size / 1024) / 1024) / 1024);
}
void kill_pid(pid_t pid)
{
int ret;
int childno;
if (pid == -1) {
show_backtrace();
syslogf("kill_pid tried to kill -1!\n");
return;
}
if (pid == 0) {
show_backtrace();
syslogf("tried to kill_pid 0!\n");
return;
}
childno = find_childno(pid);
if (childno != CHILD_NOT_FOUND) {
if (shm->children[childno]->dontkillme == TRUE)
return;
}
ret = kill(pid, SIGKILL);
if (ret != 0)
debugf("couldn't kill pid %d [%s]\n", pid, strerror(errno));
}
void freeptr(unsigned long *p)
{
void *ptr = (void *) *p;
if (ptr != NULL)
free(ptr);
*p = 0L;
}
int get_num_fds(void)
{
int fd_count;
char buf[64];
struct dirent *dp;
snprintf(buf, 64, "/proc/%i/fd/", mainpid);
fd_count = 0;
DIR *dir = opendir(buf);
while ((dp = readdir(dir)) != NULL) {
fd_count++;
}
closedir(dir);
return fd_count;
}
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