[unix-history] / usr / src / lib / libc / gen / perror.c

/* @(#)perror.c	4.2 (Berkeley) 6/30/83 */
/*
 * Print the error indicated
 * in the cerror cell.
 */
#include <sys/types.h>
#include <sys/uio.h>

int	errno;
int	sys_nerr;
char	*sys_errlist[];
perror(s)
	char *s;
{
	struct iovec iov[4];
	register struct iovec *v = iov;

	if (s && *s) {
		v->iov_base = s;
		v->iov_len = strlen(s);
		v++;
		v->iov_base = ": ";
		v->iov_len = 2;
		v++;
	}
	v->iov_base = errno < sys_nerr ? sys_errlist[errno] : "Unknown error";
	v->iov_len = strlen(v->iov_base);
	v++;
	v->iov_base = "\n";
	v->iov_len = 1;
	writev(2, iov, (v - iov) + 1);
}
Commit	Line	Data
0f4556f1	1	/* @(#)perror.c 4.2 (Berkeley) 6/30/83 */
716337de BJ	2	/*
	3	* Print the error indicated
	4	* in the cerror cell.
	5	*/
df5b5637 SL	6	#include <sys/types.h>
df5b5637 SL	7	#include <sys/uio.h>
716337de BJ	8
	9	int errno;
	10	int sys_nerr;
	11	char *sys_errlist[];
	12	perror(s)
df5b5637	13	char *s;
716337de	14	{
df5b5637 SL	15	struct iovec iov[4];
df5b5637 SL	16	register struct iovec *v = iov;
716337de	17
df5b5637 SL	18	if (s && *s) {
	19	v->iov_base = s;
	20	v->iov_len = strlen(s);
	21	v++;
	22	v->iov_base = ": ";
	23	v->iov_len = 2;
	24	v++;
716337de	25	}
df5b5637 SL	26	v->iov_base = errno < sys_nerr ? sys_errlist[errno] : "Unknown error";
	27	v->iov_len = strlen(v->iov_base);
	28	v++;
	29	v->iov_base = "\n";
	30	v->iov_len = 1;
	31	writev(2, iov, (v - iov) + 1);
716337de	32	}