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Annotation of 43BSDReno/lib/libc/net/herror.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1987 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that: (1) source distributions retain this entire copyright
                      7:  * notice and comment, and (2) distributions including binaries display
                      8:  * the following acknowledgement:  ``This product includes software
                      9:  * developed by the University of California, Berkeley and its contributors''
                     10:  * in the documentation or other materials provided with the distribution
                     11:  * and in all advertising materials mentioning features or use of this
                     12:  * software. Neither the name of the University nor the names of its
                     13:  * contributors may be used to endorse or promote products derived
                     14:  * from this software without specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  */
                     19: 
                     20: #if defined(LIBC_SCCS) && !defined(lint)
                     21: static char sccsid[] = "@(#)herror.c   6.5 (Berkeley) 6/1/90";
                     22: #endif /* LIBC_SCCS and not lint */
                     23: 
                     24: #include <sys/types.h>
                     25: #include <sys/uio.h>
                     26: 
                     27: char   *h_errlist[] = {
                     28:        "Error 0",
                     29:        "Unknown host",                         /* 1 HOST_NOT_FOUND */
                     30:        "Host name lookup failure",             /* 2 TRY_AGAIN */
                     31:        "Unknown server error",                 /* 3 NO_RECOVERY */
                     32:        "No address associated with name",      /* 4 NO_ADDRESS */
                     33: };
                     34: int    h_nerr = { sizeof(h_errlist)/sizeof(h_errlist[0]) };
                     35: 
                     36: extern int     h_errno;
                     37: 
                     38: /*
                     39:  * herror --
                     40:  *     print the error indicated by the h_errno value.
                     41:  */
                     42: herror(s)
                     43:        char *s;
                     44: {
                     45:        struct iovec iov[4];
                     46:        register struct iovec *v = iov;
                     47: 
                     48:        if (s && *s) {
                     49:                v->iov_base = s;
                     50:                v->iov_len = strlen(s);
                     51:                v++;
                     52:                v->iov_base = ": ";
                     53:                v->iov_len = 2;
                     54:                v++;
                     55:        }
                     56:        v->iov_base = (u_int)h_errno < h_nerr ?
                     57:            h_errlist[h_errno] : "Unknown error";
                     58:        v->iov_len = strlen(v->iov_base);
                     59:        v++;
                     60:        v->iov_base = "\n";
                     61:        v->iov_len = 1;
                     62:        writev(2, iov, (v - iov) + 1);
                     63: }

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