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