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Annotation of 43BSD/lib/libc/gen/perror.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1980 Regents of the University of California.
                      3:  * All rights reserved.  The Berkeley software License Agreement
                      4:  * specifies the terms and conditions for redistribution.
                      5:  */
                      6: 
                      7: #if defined(LIBC_SCCS) && !defined(lint)
                      8: static char sccsid[] = "@(#)perror.c   5.2 (Berkeley) 3/9/86";
                      9: #endif LIBC_SCCS and not lint
                     10: 
                     11: /*
                     12:  * Print the error indicated
                     13:  * in the cerror cell.
                     14:  */
                     15: #include <sys/types.h>
                     16: #include <sys/uio.h>
                     17: 
                     18: int    errno;
                     19: int    sys_nerr;
                     20: char   *sys_errlist[];
                     21: perror(s)
                     22:        char *s;
                     23: {
                     24:        struct iovec iov[4];
                     25:        register struct iovec *v = iov;
                     26: 
                     27:        if (s && *s) {
                     28:                v->iov_base = s;
                     29:                v->iov_len = strlen(s);
                     30:                v++;
                     31:                v->iov_base = ": ";
                     32:                v->iov_len = 2;
                     33:                v++;
                     34:        }
                     35:        v->iov_base = errno < sys_nerr ? sys_errlist[errno] : "Unknown error";
                     36:        v->iov_len = strlen(v->iov_base);
                     37:        v++;
                     38:        v->iov_base = "\n";
                     39:        v->iov_len = 1;
                     40:        writev(2, iov, (v - iov) + 1);
                     41: }

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