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#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include "errors.h"
void
vwarn(const char *fmt, va_list ap)
{
int save = errno;
fprintf(stderr, "%s: ", mlib_progname());
vfprintf(stderr, fmt, ap);
if (fmt[strlen(fmt) - 1] == ':')
fprintf(stderr, " %s", strerror(save));
fputc('\n', stderr);
}
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