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#define _GNU_SOURCE /* program_invocation_name */
#include <errno.h> /* program_invocation_name */
#include <stdarg.h> /* va_list, va_start, va_end */
#include <stdio.h> /* fflush, fputc, fputs, stderr, stdout, vfprintf */
#include <string.h> /* strerror */
/**
* Print an error message.
*
* LSB 5.0: LSB-Core-generic/baselib-error-n.html
*/
void error(int status, int errnum, const char *format, ...)
{
va_list ap;
fflush(stdout);
fputs(program_invocation_name, stderr);
fputs(": ", stderr);
va_start(ap, format);
vfprintf(stderr, format, ap);
va_end(ap);
if (errnum != 0) {
fputs(": ", stderr);
fputs(strerror(errnum), stderr);
fputc('\n', stderr);
}
}
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