Check if given process PID has been executed from memory (memfd_create)

src.c

#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>

/*
 * Checks if it's our target process
 */
static int is_our_target_process(int pid)
{
    char procExe[256];
    snprintf(procExe, sizeof(procExe), "/proc/%d/exe", pid);

    struct stat lstat_buf;
    int x;
    x = lstat(procExe, &lstat_buf);
    if (S_ISLNK(lstat_buf.st_mode))
    {
        char linkPath[1024];
        size_t len;
        if ((len = readlink(procExe, linkPath, sizeof(linkPath) - 1)) != -1)
        {
            linkPath[len] = '\0';
            if (strcmp("/memfd: (deleted)", linkPath) == 0)
            {
                return 1;
            }
        }
    }

    return 0;
}

int main(void)
{
	int pid = 876;
	printf("is_our_target_process: %d\n", is_our_target_process(pid));
}