Get process name given PID

#snippets
May 20, 2022

Description

Given a process id get the process name in a POSIX system environment.

C

void print_name_pid(pid_t pid)
{
    char name[PATH_MAX];
    int c, i = 0;
    FILE *f;

    sprintf(name, "/proc/%ld/cmdline", (long) pid);
    f = fopen(name, "r");

    if(!f) {
        printf("Not able to open cmdline file\n");
        return;
    }

    while((c = getc(f)) != EOF && c != 0)
	    name[i++] = c;

    name[i] = '\0';
    printf("%s(%ld)\n", name, (long)pid);
    fclose(f);
}