usr/src/lib/print/libpapi-dynamic/common/psm.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 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  */
  27
  28 /* $Id: psm.c 146 2006-03-24 00:26:54Z njacobs $ */
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #include <stdio.h>
  33 #include <unistd.h>
  34 #include <errno.h>
  35 #include <string.h>
  36 #include <dlfcn.h>
  37 #include <papi_impl.h>
  38
  39 #ifndef RTLD_GROUP
  40 #define RTLD_GROUP 0
  41 #endif  /* RTLD_GROUP */
  42
  43 #ifndef PSM_DIR
  44 #define PSM_DIR "/usr/lib/print"
  45 #endif
  46
  47 papi_status_t
  48 psm_open(service_t *svc, char *scheme)
  49 {
  50         papi_status_t result = PAPI_OK;
  51         char path[BUFSIZ];
  52
  53         if ((scheme == NULL) || (strchr(scheme, '/') != NULL))
  54                 return (PAPI_BAD_ARGUMENT);
  55
  56         snprintf(path, sizeof (path), PSM_DIR "/psm-%s.so", scheme);
  57
  58         svc->so_handle = dlopen(path, RTLD_LAZY|RTLD_LOCAL|RTLD_GROUP);
  59         if (svc->so_handle == NULL) {   /* failed, set the result/message */
  60                 if ((access(path, F_OK) < 0) && (errno == ENOENT))
  61                         result = PAPI_URI_SCHEME;
  62                 else
  63                         result = PAPI_NOT_POSSIBLE;
  64 #ifdef DEBUG
  65                 detailed_error(svc, "psm_open(%s): %s: %s", scheme, path,
  66                                 dlerror());
  67 #endif
  68         }
  69
  70         return (result);
  71 }
  72
  73 void
  74 psm_close(void *handle)
  75 {
  76         dlclose(handle);
  77 }
  78
  79 void *
  80 psm_sym(service_t *svc, char *name)
  81 {
  82         char *error = "invalid input";
  83         void *func = NULL;
  84
  85         if ((svc != NULL) && (svc->so_handle != NULL) && (name != NULL)) {
  86                 if ((func = dlsym(svc->so_handle, name)) == NULL)
  87                         error = dlerror();
  88         }
  89 #ifdef DEBUG
  90         if (func == NULL)
  91                 detailed_error(svc, "psm_sym(%s): %s", name, error);
  92 #endif
  93
  94         return (func);
  95 }