pintos-doxygen/html/cat_8c_source.html

/** cat.c


   Prints files specified on command line to the console. */


#include <stdio.h>

#include <syscall.h>


int

main (int argc, char *argv[])

{

  bool success = true;

  int i;


  for (i = 1; i < argc; i++)

    {

      int fd = open (argv[i]);

      if (fd < 0)

        {

          printf ("%s: open failed\n", argv[i]);

          success = false;

          continue;

        }

      for (;;)

        {

          char buffer[1024];

          int bytes_read = read (fd, buffer, sizeof buffer);

          if (bytes_read == 0)

            break;

          write (STDOUT_FILENO, buffer, bytes_read);

        }

      close (fd);

    }

  return success ? EXIT_SUCCESS : EXIT_FAILURE;

}

main
int main(int argc, char *argv[])
cat.c
Definition: cat.c:9

buffer
static struct intq buffer
Stores keys from the keyboard and serial port.
Definition: input.c:7

printf
int printf(const char *format,...)
Writes formatted output to the console.
Definition: stdio.c:79

close
void close(int fd)
Definition: syscall.c:139

open
int open(const char *file)
Definition: syscall.c:103

write
int write(int fd, const void *buffer, unsigned size)
Definition: syscall.c:121

read
int read(int fd, void *buffer, unsigned size)
Definition: syscall.c:115

EXIT_SUCCESS
#define EXIT_SUCCESS
Typical return values from main() and arguments to exit().
Definition: syscall.h:19

EXIT_FAILURE
#define EXIT_FAILURE
Unsuccessful execution.
Definition: syscall.h:20

STDOUT_FILENO
#define STDOUT_FILENO
Definition: stdio.h:16