usr/src/lib/print/libpapi-lpd/common/lpd-misc.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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  */
  27
  28 /* $Id: lpd-misc.c 155 2006-04-26 02:34:54Z ktou $ */
  29
  30 #define __EXTENSIONS__  /* for strtok_r() */
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <unistd.h>
  34 #include <sys/types.h>
  35 #include <fcntl.h>
  36 #include <stdarg.h>
  37 #include <string.h>
  38 #include <signal.h>
  39 #include <sys/socket.h>
  40 #include <errno.h>
  41 #include <wait.h>
  42 #include <stropts.h>
  43 #include <papi_impl.h>
  44
  45 #include <config-site.h>
  46
  47 char *
  48 fdgets(char *buf, size_t len, int fd)
  49 {
  50         char    tmp;
  51         int     count = 0;
  52
  53         memset(buf, 0, len);
  54         while ((count < len) && (read(fd, &tmp, 1) > 0))
  55                 if ((buf[count++] = tmp) == '\n') break;
  56
  57         if (count != 0)
  58                 return (buf);
  59         return (NULL);
  60 }
  61
  62 char *
  63 queue_name_from_uri(uri_t *uri)
  64 {
  65         char *result = NULL;
  66
  67         if ((uri != NULL) && (uri->path != NULL)) {
  68                 char *ptr = strrchr(uri->path, '/');
  69
  70                 if (ptr == NULL)
  71                         result = uri->path;
  72                 else
  73                         result = ++ptr;
  74         }
  75
  76         return (result);
  77 }
  78
  79 static int
  80 recvfd(int sockfd)
  81 {
  82         int fd = -1;
  83 #if defined(sun) && defined(unix) && defined(I_RECVFD)
  84         struct strrecvfd recv_fd;
  85
  86         memset(&recv_fd, NULL, sizeof (recv_fd));
  87         if (ioctl(sockfd, I_RECVFD, &recv_fd) == 0)
  88                 fd = recv_fd.fd;
  89 #else
  90         struct iovec    iov[1];
  91         struct msghdr   msg;
  92
  93 #ifdef CMSG_DATA
  94         struct cmsghdr cmp[1];
  95         char buf[24];   /* send/recv 2 byte protocol */
  96
  97         memset(buf, 0, sizeof (buf));
  98
  99         iov[0].iov_base = buf;
 100         iov[0].iov_len = sizeof (buf);
 101
 102         msg.msg_control = cmp;
 103         msg.msg_controllen = sizeof (struct cmsghdr) + sizeof (int);
 104 #else
 105         iov[0].iov_base = NULL;
 106         iov[0].iov_len = 0;
 107         msg.msg_accrights = (caddr_t)&fd;
 108         msg.msg_accrights = sizeof (fd);
 109 #endif
 110         msg.msg_iov = iov;
 111         msg.msg_iovlen = 1;
 112         msg.msg_name = NULL;
 113         msg.msg_namelen = 0;
 114
 115         if (recvmsg(sockfd, &msg, 0) < 0)
 116                 fd = -1;
 117 #ifdef CMSG_DATA
 118         else
 119                 fd = * (int *)CMSG_DATA(cmp);
 120 #endif
 121 #endif
 122         return (fd);
 123 }
 124
 125 int
 126 lpd_open(service_t *svc, char type, char **args, int timeout)
 127 {
 128         int ac, rc = -1, fds[2];
 129         pid_t pid;
 130         char *av[64], *tmp, buf[BUFSIZ];
 131
 132         if ((svc == NULL) || (svc->uri == NULL))
 133                 return (-1);
 134
 135 #ifndef SUID_LPD_PORT
 136 #define SUID_LPD_PORT "/usr/lib/print/lpd-port"
 137 #endif
 138
 139         av[0] = SUID_LPD_PORT; ac = 1;
 140
 141         /* server */
 142         av[ac++] = "-H";
 143         av[ac++] = svc->uri->host;
 144
 145         /* timeout */
 146         if (timeout > 0) {
 147                 snprintf(buf, sizeof (buf), "%d", timeout);
 148                 av[ac++] = "-t";
 149                 av[ac++] = strdup(buf);
 150         }
 151
 152         /* operation */
 153         snprintf(buf, sizeof (buf), "-%c", type);
 154         av[ac++] = buf;
 155
 156         /* queue */
 157         if (svc->uri->path == NULL) {
 158                 tmp = "";
 159         } else {
 160                 if ((tmp = strrchr(svc->uri->path, '/')) == NULL)
 161                         tmp = svc->uri->path;
 162                 else
 163                         tmp++;
 164         }
 165         av[ac++] = tmp;
 166
 167         /* args */
 168         if (args != NULL)
 169                 while ((*args != NULL) && (ac < 62))
 170                         av[ac++] = *args++;
 171
 172         av[ac++] = NULL;
 173
 174 #if defined(sun) && defined(unix) && defined(I_RECVFD)
 175         pipe(fds);
 176 #else
 177         socketpair(AF_UNIX, SOCK_STREAM, 0, fds);
 178 #endif
 179
 180         switch (pid = fork()) {
 181         case -1:        /* failed */
 182                 break;
 183         case 0:  /* child */
 184                 dup2(fds[1], 1);
 185                 execv(av[0], &av[0]);
 186                 perror("exec");
 187                 exit(1);
 188                 break;
 189         default: {      /* parent */
 190                 int err, status = 0;
 191
 192                 while ((waitpid(pid, &status, 0) < 0) && (errno == EINTR));
 193                 errno = WEXITSTATUS(status);
 194
 195                 if (errno == 0)
 196                         rc = recvfd(fds[0]);
 197
 198                 err = errno;
 199                 close(fds[0]);
 200                 close(fds[1]);
 201                 errno = err;
 202                 }
 203         }
 204
 205         return (rc);
 206 }