sbase/tee.c

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/* See LICENSE file for copyright and license details. */
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#include <signal.h>
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#include <stdio.h>
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#include "util.h"
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static void
usage(void)
{
eprintf("usage: %s [-ai] [file ...]\n", argv0);
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}
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int
main(int argc, char *argv[])
{
FILE **fps = NULL;
size_t i, n, nfps;
int ret = 0, aflag = 0, iflag = 0;
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char buf[BUFSIZ];
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ARGBEGIN {
case 'a':
aflag = 1;
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break;
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case 'i':
iflag = 1;
break;
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default:
usage();
} ARGEND
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if (iflag && signal(SIGINT, SIG_IGN) == SIG_ERR)
eprintf("signal:");
nfps = argc + 1;
fps = ecalloc(nfps, sizeof(*fps));
for (i = 0; i < argc; i++)
if (!(fps[i] = fopen(argv[i], aflag ? "a" : "w")))
eprintf("fopen %s:", argv[i]);
fps[i] = stdout;
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while ((n = fread(buf, 1, sizeof(buf), stdin))) {
for (i = 0; i < nfps; i++) {
if (fwrite(buf, 1, n, fps[i]) == n)
continue;
eprintf("fwrite %s:", (i != argc) ? argv[i] : "<stdout>");
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}
}
ret |= fshut(stdin, "<stdin>") | fshut(stdout, "<stdout>");
return ret;
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}