sbase/util/concat.c

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/* See LICENSE file for copyright and license details. */
#include <stdio.h>
#include <unistd.h>
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#include "../text.h"
#include "../util.h"
void
concat(FILE *fp1, const char *s1, FILE *fp2, const char *s2)
{
char buf[BUFSIZ];
ssize_t n;
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while ((n = read(fileno(fp1), buf, sizeof buf)) > 0) {
if (write(fileno(fp2), buf, n) != n)
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eprintf("%s: write error:", s2);
}
if (n < 0)
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eprintf("%s: read error:", s1);
}