53 lines
961 B
C
53 lines
961 B
C
/* See LICENSE file for copyright and license details. */
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "util.h"
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static void
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usage(void)
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{
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eprintf("usage: %s [-a] [file...]\n", argv0);
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}
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int
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main(int argc, char *argv[])
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{
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bool aflag = false;
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char buf[BUFSIZ];
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int i, nfps = 1;
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size_t n;
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FILE **fps;
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ARGBEGIN {
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case 'a':
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aflag = true;
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break;
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default:
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usage();
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} ARGEND;
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if(!(fps = malloc(sizeof *fps)))
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eprintf("malloc:");
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fps[nfps-1] = stdout;
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for(; argc > 0; argc--, argv++) {
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if(!(fps = realloc(fps, ++nfps * sizeof *fps)))
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eprintf("realloc:");
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if(!(fps[nfps-1] = fopen(argv[0], aflag ? "a" : "w")))
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eprintf("fopen %s:", argv[0]);
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}
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while((n = fread(buf, 1, sizeof buf, stdin)) > 0) {
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for(i = 0; i < nfps; i++) {
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if(fwrite(buf, 1, n, fps[i]) != n)
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eprintf("%s: write error:", buf);
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}
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}
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if(ferror(stdin))
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eprintf("<stdin>: read error:");
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return EXIT_SUCCESS;
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}
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