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