58 lines
1.0 KiB
C++
58 lines
1.0 KiB
C++
|
#include <ctype.h>
|
||
|
|
#include <dirent.h>
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <sys/banan-os.h>
|
||
|
|
|
||
|
|
bool is_only_digits(const char* str)
|
||
|
|
{
|
||
|
|
while (*str)
|
||
|
|
if (!isdigit(*str++))
|
||
|
|
return false;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
int main()
|
||
|
|
{
|
||
|
|
DIR* proc = opendir("/proc");
|
||
|
|
if (proc == nullptr)
|
||
|
|
{
|
||
|
|
perror("opendir");
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
char path_buffer[128] {};
|
||
|
|
while (dirent* proc_ent = readdir(proc))
|
||
|
|
{
|
||
|
|
if (proc_ent->d_type != DT_DIR)
|
||
|
|
continue;
|
||
|
|
if (!is_only_digits(proc_ent->d_name))
|
||
|
|
continue;
|
||
|
|
|
||
|
|
strcpy(path_buffer, proc_ent->d_name);
|
||
|
|
strcat(path_buffer, "/meminfo");
|
||
|
|
|
||
|
|
int fd = openat(dirfd(proc), path_buffer, O_RDONLY);
|
||
|
|
if (fd == -1)
|
||
|
|
{
|
||
|
|
perror("openat");
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
proc_meminfo_t meminfo;
|
||
|
|
if (read(fd, &meminfo, sizeof(meminfo)) == -1)
|
||
|
|
perror("read");
|
||
|
|
else
|
||
|
|
{
|
||
|
|
printf("process:\n");
|
||
|
|
printf(" pid: %s\n", proc_ent->d_name);
|
||
|
|
printf(" vmem: %zu pages (%zu bytes)\n", meminfo.virt_pages, meminfo.page_size * meminfo.virt_pages);
|
||
|
|
}
|
||
|
|
|
||
|
|
close(fd);
|
||
|
|
}
|
||
|
|
|
||
|
|
closedir(proc);
|
||
|
|
}
|