66 lines
1.3 KiB
C
66 lines
1.3 KiB
C
/* tee - pipe fitting Author: Paul Polderman */
|
|
|
|
#include <sys/types.h>
|
|
#include <fcntl.h>
|
|
#include <signal.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <minix/minlib.h>
|
|
|
|
#define MAXFD 18
|
|
#define CHUNK_SIZE 4096
|
|
|
|
int fd[MAXFD];
|
|
|
|
_PROTOTYPE(int main, (int argc, char **argv));
|
|
|
|
int main(argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
char iflag = 0, aflag = 0;
|
|
char buf[CHUNK_SIZE];
|
|
int i, s, n;
|
|
|
|
argv++;
|
|
--argc;
|
|
while (argc > 0 && argv[0][0] == '-') {
|
|
switch (argv[0][1]) {
|
|
case 'i': /* Interrupt turned off. */
|
|
iflag++;
|
|
break;
|
|
case 'a': /* Append to outputfile(s), instead of
|
|
* overwriting them. */
|
|
aflag++;
|
|
break;
|
|
default:
|
|
std_err("Usage: tee [-i] [-a] [files].\n");
|
|
exit(1);
|
|
}
|
|
argv++;
|
|
--argc;
|
|
}
|
|
fd[0] = 1; /* Always output to stdout. */
|
|
for (s = 1; s < MAXFD && argc > 0; --argc, argv++, s++) {
|
|
if (aflag && (fd[s] = open(*argv, O_RDWR)) >= 0) {
|
|
lseek(fd[s], 0L, SEEK_END);
|
|
continue;
|
|
} else {
|
|
if ((fd[s] = creat(*argv, 0666)) >= 0) continue;
|
|
}
|
|
std_err("Cannot open output file: ");
|
|
std_err(*argv);
|
|
std_err("\n");
|
|
exit(2);
|
|
}
|
|
|
|
if (iflag) signal(SIGINT, SIG_IGN);
|
|
|
|
while ((n = read(0, buf, CHUNK_SIZE)) > 0) {
|
|
for (i = 0; i < s; i++) write(fd[i], buf, n);
|
|
}
|
|
|
|
for (i = 0; i < s; i++) /* Close all fd's */
|
|
close(fd[i]);
|
|
return(0);
|
|
}
|