usr/src/lib/libbc/libc/sys/common/send.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 1990-1997 by Sun Microsystems, Inc.
  24  * All rights reserved.
  25  */
  26
  27 #ident  "%Z%%M% %I%     %E% SMI"
  28
  29 #include <sys/types.h>
  30 #include <sys/socket.h>
  31 #include <sys/errno.h>
  32 #include <sys/stat.h>
  33 #include <fcntl.h>
  34 #include <sys/syslog.h>
  35 #include <sys/strlog.h>
  36 #include <sys/stropts.h>
  37 #include <stdio.h>
  38
  39 extern int errno;
  40
  41 #define N_AGAIN 11
  42
  43 int
  44 send(s, msg, len, flags)
  45         int     s;
  46         char    *msg;
  47         int     len, flags;
  48 {
  49         int     a;
  50         if ((a = _send(s, msg, len, flags)) == -1) {
  51                 if (errno == N_AGAIN)
  52                         errno = EWOULDBLOCK;
  53                 else
  54                         maperror();
  55         }
  56         return (a);
  57 }
  58
  59
  60 /* Added to convert socket "/dev/log" to stream "/dev/conslog" */
  61 #define logname         "/dev/conslog"
  62 #define MAXLINE         1024
  63 #define SVR4_ENOTSOCK   95      /* Socket operation on non-socket */
  64
  65
  66 int
  67 sendto(s, msg, len, flags, to, tolen)
  68         int     s;
  69         char    *msg;
  70         int     len, flags;
  71         struct sockaddr *to;
  72         int     tolen;
  73 {
  74         int     a;
  75         static int LogDev = -1;
  76         /* check for  logfile */
  77
  78         if ((a = _sendto(s, msg, len, flags, to, tolen)) == -1) {
  79                 if (errno == SVR4_ENOTSOCK &&
  80                     strcmp(to->sa_data, "/dev/log") == 0) {
  81                         char *msg_p;
  82                         struct log_ctl hdr;
  83                         struct strbuf dat;
  84                         struct strbuf ctl;
  85                         struct stat sbuf;
  86                         if (LogDev == -1) {
  87                                 int     tfd;
  88                                 /* close socket /dev/log */
  89                                 close(s);
  90                                 /* open stream /dev/conslog */
  91                                 tfd = open(logname, O_WRONLY);
  92                                 if (tfd == -1)
  93                                         return (-1);
  94                                 /* insure stream has same fd as closed socket */
  95                                 if (tfd != s) {
  96                                         if (dup2(tfd, s) < 0) {
  97                                                 close(tfd);
  98                                                 return (-1);
  99                                         }
 100                                         close(tfd);
 101                                 }
 102                                 if (fcntl(s, F_SETFD, FD_CLOEXEC) == -1)
 103                                         return (-1);
 104                                 if (fstat(s, &sbuf) != -1)
 105                                         LogDev = sbuf.st_rdev;
 106
 107                         } else if (fstat(s, &sbuf) == -1 ||
 108                             LogDev != sbuf.st_rdev)
 109                                 return (-1);
 110
 111                         /* build the header */
 112
 113                         /* parse <pri> from msg */
 114
 115                         hdr.mid = 1; /* 0 for kernal */
 116                         /* sid, ltime, ttime, seq_no not used */
 117
 118                         hdr.pri = strtol(msg + 1, &msg_p, 10);
 119                         if (msg + 1 == msg_p) {
 120                                 hdr.pri = (LOG_USER|LOG_INFO);
 121                         } else {
 122                                 len -= msg_p - msg;
 123                                 msg = msg_p + 1;
 124                         }
 125                         hdr.flags = SL_CONSOLE;
 126                         hdr.level = 0;
 127
 128                         ctl.maxlen = sizeof (struct log_ctl);
 129                         ctl.len = sizeof (struct log_ctl);
 130                         ctl.buf = (caddr_t)&hdr;
 131                         dat.maxlen = MAXLINE;
 132                         dat.len = len;
 133                         if (dat.len > MAXLINE) {
 134                                 dat.len = MAXLINE;
 135                                 msg[MAXLINE - 1] = '\0';
 136                         }
 137                         dat.buf = msg;
 138
 139                         /* output the message to the local logger */
 140                         if (_putmsg(s, &ctl, &dat, 0) == 0)
 141                                 return (0);
 142                 }
 143                 if (errno == N_AGAIN)
 144                         errno = EWOULDBLOCK;
 145                 else
 146                         maperror();
 147         }
 148         return (a);
 149 }
 150
 151
 152 int
 153 sendmsg(s, msg, flags)
 154         int     s;
 155         struct msghdr *msg;
 156         int     flags;
 157 {
 158         int     a;
 159         if ((a = _sendmsg(s, msg, flags)) == -1) {
 160                 if (errno == N_AGAIN)
 161                         errno = EWOULDBLOCK;
 162                 else
 163                         maperror();
 164         }
 165         return (a);
 166 }