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/****************************************
* copy -- copy one file to another. *
* *
* Usage *
* copy <from> <to> *
* *
* <from> -- the file to copy from *
* <to> -- the file to copy into *
****************************************/
#include <stdio.h>
#ifndef __MSDOS__ /* if we are not MS-DOS */
#define __UNIX__ /* then we are UNIX */
#endif __MSDOS__
#include <stdlib.h> /* ANSI Standard C file */
#ifdef __UNIX__
#include <sys/types.h> /* file defines for UNIX filesystem */
#include <sys/stat.h>
#include <fcntl.h>
#endif __UNIX__
#ifdef __MSDOS__
#include <fcntl.h> /* file defines for DOS filesystem */
#include <sys\stat.h>
#include <io.h>
#endif __MSDOS__
void exit(); /* lib routine */
#define BUFFER_SIZE (16 * 1024) /* use 16K buffers */
main(int argc, char *argv[])
{
char buffer[BUFFER_SIZE]; /* buffer for data */
int in_file; /* input file descriptor */
int out_file; /* output file descriptor */
int read_size; /* number of bytes on last read */
if (argc != 3) {
(void) fprintf(stderr, "Error:Wrong number of arguments\n");
(void) fprintf(stderr, "Usage is: copy <from> <to>\n");
exit(8);
}
in_file = open(argv[1], O_RDONLY);
if (in_file < 0) {
(void) fprintf("Error:Unable to open %s\n", argv[1]);
exit(8);
}
out_file = open(argv[2], O_WRONLY | O_TRUNC | O_CREAT, 0666);
if (out_file < 0) {
(void) fprintf("Error:Unable to open %s\n", argv[2]);
exit(8);
}
while (1) {
read_size = read(in_file, buffer, sizeof(buffer));
if (read_size == 0)
break; /* end of file */
if (read_size < 0) {
(void) fprintf(stderr, "Error:Read error\n");
exit(8);
}
(void) write(out_file, buffer, (unsigned int) read_size);
}
(void) close(in_file);
(void) close(out_file);
return (0);
}
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