pintos-doxygen/html/multi-recurse_8c_source.html

/** Executes itself recursively to the depth indicated by the

   first command-line argument. */


#include <debug.h>

#include <stdlib.h>

#include <stdio.h>

#include <syscall.h>

#include "tests/lib.h"


const char *test_name = "multi-recurse";


int

main (int argc UNUSED, char *argv[])

{

  int n = atoi (argv[1]);


  msg ("begin %d", n);

  if (n != 0)

    {

      char child_cmd[128];

      pid_t child_pid;

      int code;


      snprintf (child_cmd, sizeof child_cmd, "multi-recurse %d", n - 1);

      CHECK ((child_pid = exec (child_cmd)) != -1, "exec(\"%s\")", child_cmd);


      code = wait (child_pid);

      if (code != n - 1)

        fail ("wait(exec(\"%s\")) returned %d", child_cmd, code);

    }


  msg ("end %d", n);

  return n;

}

debug.h

UNUSED
#define UNUSED
GCC lets us add "attributes" to functions, function parameters, etc.
Definition: debug.h:7

wait
static void wait(struct intq *q, struct thread **waiter)

snprintf
int snprintf(char *buffer, size_t buf_size, const char *format,...)
Like printf(), except that output is stored into BUFFER, which must have space for BUF_SIZE character...
Definition: stdio.c:62

atoi
int atoi(const char *s)
Converts a string representation of a signed decimal integer in S into an ‘int’, which is returned.
Definition: stdlib.c:10

exec
pid_t exec(const char *file)
Definition: syscall.c:79

pid_t
int pid_t
Process identifier.
Definition: syscall.h:8

fail
void fail(const char *format,...)
Definition: lib.c:40

msg
void msg(const char *format,...)
Definition: lib.c:28

lib.h

CHECK
#define CHECK(SUCCESS,...)
Takes an expression to test for SUCCESS and a message, which may include printf-style arguments.
Definition: lib.h:29

main
int main(int argc UNUSED, char *argv[])
Definition: multi-recurse.c:13

test_name
const char * test_name
Executes itself recursively to the depth indicated by the first command-line argument.
Definition: multi-recurse.c:10

stdlib.h