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#include <u.h>
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#include <libc.h>
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#include "ssh2.h"
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void
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freeptr(void **vpp)
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{
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	char **cpp;
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	cpp = vpp;
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	free(*cpp);
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	*cpp = nil;
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}
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int
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readfile(char *file, char *buf, int size)
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{
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	int n, fd;
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	fd = open(file, OREAD);
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	if (fd < 0)
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		return -1;
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	n = readn(fd, buf, size - 1);
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	if (n < 0)
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		buf[0] = '\0';
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	else
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		buf[n] = '\0';
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	close(fd);
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	return n;
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}