/usr/include/bits/resource.h exists but cannot be opened (breaks wait() / wait macros example )

[angrave]

Steps to reproduce. Include the #includes that wait() requires:

#include <sys/types.h> 
#include <sys/wait.h>

I found resource.h using
ls -l /usr/include/bits
However it looks like it is "sticky"
(there are some other suspicious zero length files in there too e.g. user.h)

Switching to root. rm-ing and touch-ing resource.h 'fixes' the original problem.
i.e. We can now compile and run the following example -

#include <stdio.h>
#include <unistd.h>
#include <sys/types.h> 
#include <sys/wait.h>

pid_t childid;
void child() {
    // ______ Make the alarm go in 1 second
    alarm(1);
    sleep(2);
    puts("I'm the child exiting normally");
    exit(0);
}

void parent() {
    int status;
    waitpid(childid, &status, 0);
    if(WIFSIGNALED (status)) {
        printf("Child exited due to signal %d\n", WTERMSIG(status));
        if(WTERMSIG (status) == SIGALRM)
        puts("ALARM CLOCK");
    }else
    if( WIFEXITED(status)) {
        printf("Child exited with %d\n", WEXITSTATUS(status));
    }
}
int main() {
    printf("Hello world!\n");

    childid = fork ();
    if(childid >0) parent();
    else if(childid == 0) child();
    else puts ("fork failed"); // print error

    return 0;
}

[angrave]

Short term workaround suggestion: temporary scriptable fixes/hacks (e.g. su/rm/touch) can be added to the bootup java script easier than maintaining the linux disk image.

(Also would also be useful to make changes to the disk image more repeatable i.e. repeatable buildscript/patch listing that can be applied to vanilla jor1k image)