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#include <errno.h>
#include <stdio.h>
#include <string.h>
#include "_safety.h"
#include "_readonly.h"
/** convert error number to string **/
char * strerror(int errnum)
{
static char *errstr = NULL;
SIGNAL_SAFE(0);
if (errstr == NULL) {
errstr = __readonly(RO_ALLOC, "strerror");
}
__readonly(RO_UNLOCK, errstr);
switch (errnum) {
#include "_strerror.h"
default:
sprintf(errstr, "unknown error [%d]", errnum);
break;
}
__readonly(RO_LOCK, errstr);
/*
RETURN_ALWAYS(a pointer to the message string);
*/
return errstr;
}
CHECK_1(char *, 0, strerror, int)
/***
converts the error number ARGUMENT(errnum) to an error message
string. The string returned should not be modified, and may be overwritten by
subsequent calls.
***/
/*
STDC(1)
*/
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