usr/src/cmd/bnu/limits.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 2005 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  28 /*        All Rights Reserved   */
  29
  30
  31 #pragma ident   "%Z%%M% %I%     %E% SMI"
  32
  33 #include "uucp.h"
  34
  35 /* add sitedep() and sysmatch() to list when ifdefs are removed below */
  36 static int get_tokens(), siteindep();
  37
  38 /*  field array indexes for LIMIT parameters */
  39
  40 #define U_SERVICE       0
  41 #define U_MAX           1
  42 #define U_SYSTEM        2
  43 #define U_MODE          3
  44
  45 static char * _Lwords[] = {"service", "max", "system", "mode"};
  46
  47 #define NUMFLDS         4
  48
  49 struct name_value
  50 {
  51         char *name;
  52         char *value;
  53 };
  54
  55 /*
  56  * manage limits file.
  57  */
  58
  59 /*
  60  * scan the Limits file and get the limit for the given service.
  61  * return SUCCESS if the limit was found, else return FAIL.
  62  */
  63 int
  64 scanlimit(service, limitval)
  65 char *service;
  66 struct limits *limitval;
  67 {
  68         char buf[BUFSIZ];
  69         char *tokens[NUMFLDS];  /* fields found in LIMITS */
  70         char msgbuf[BUFSIZ];    /* place to build messages */
  71         FILE *Fp = NULL;        /* file pointer for LIMITS */
  72         int SIflag, SDflag;
  73
  74         if ((Fp = fopen(LIMITS, "r")) == NULL) {
  75             DEBUG(5, "cannot open %s\n", LIMITS);
  76             sprintf(msgbuf, "fopen of %s failed with errno=%%d\n", LIMITS);
  77             DEBUG(5, msgbuf, errno);
  78             return(FAIL);
  79         }
  80
  81         SIflag = FALSE;
  82         SDflag = TRUE;
  83
  84 /* The following #if (0 == 1) and #endif lines should be deleted when
  85  * we expand the functionality of the Limits file to include the
  86  * limit per site, and the mode for uucico.
  87  */
  88 #if (0 == 1)
  89         if (strcmp(service, "uucico") == SAME)
  90             SDflag = FALSE;
  91 #endif
  92
  93         while ((getuline(Fp, buf) > 0) && ((SIflag && SDflag) == FALSE)) {
  94             if (get_tokens(buf, tokens) == FAIL)
  95                 continue;
  96
  97             if (SIflag == FALSE) {
  98                 if (siteindep(tokens, service, limitval) == SUCCESS)
  99                     SIflag = TRUE;
 100             }
 101
 102 /* The following #if (0 == 1) and #endif lines should be deleted when
 103  * we expand the functionality of the Limits file to include the
 104  * limit per site, and the mode for uucico.
 105  */
 106 #if (0 == 1)
 107             if (SDflag == FALSE) {
 108                 if (sitedep(tokens, limitval) == SUCCESS)
 109                     SDflag = TRUE;
 110             }
 111 #endif
 112         }
 113
 114         fclose(Fp);
 115         if ((SIflag && SDflag) == TRUE)
 116             return(SUCCESS);
 117         else return(FAIL);
 118 }
 119
 120 /*
 121  * parse a line in LIMITS and return a vector
 122  * of fields (flds)
 123  *
 124  * return:
 125  *      SUCCESS - token pairs name match with the key words
 126  */
 127 static int
 128 get_tokens (line,flds)
 129 char *line;
 130 char *flds[];
 131 {
 132         int i;
 133         char *p;
 134         struct name_value pair;
 135
 136         /* initialize defaults  in case parameter is not specified */
 137         for (i=0;i<NUMFLDS;i++)
 138                 flds[i] = CNULL;
 139
 140         for (p=line;p && *p;) {
 141                 p = next_token (p, &pair);
 142
 143                 for (i=0; i<NUMFLDS; i++) {
 144                         if (EQUALS(pair.name, _Lwords[i])) {
 145                                 flds[i] = pair.value;
 146                                 break;
 147                         }
 148                         if (i == NUMFLDS-1) /* pair.name is not key */
 149                                 return FAIL;
 150                 }
 151         }
 152         return(SUCCESS);
 153 }
 154 /*
 155  * this function can only handle the following format
 156  *
 157  *      service=uucico max=5
 158  *
 159  * return:
 160  *      SUCCESS - OK
 161  *      FAIL - service's value does not match or wrong format
 162  */
 163 static int
 164 siteindep(flds, service, limitval)
 165 char *flds[];
 166 char *service;
 167 struct limits *limitval;
 168 {
 169
 170         if (!EQUALS(flds[U_SERVICE], service) || (flds[U_MAX] == CNULL))
 171                 return(FAIL);
 172         if (sscanf(flds[U_MAX],"%d",&limitval->totalmax)==0)
 173                 limitval->totalmax = -1; /* type conflict*/
 174         return(SUCCESS);
 175 }
 176
 177 /* The following #if (0 == 1) and #endif lines should be deleted when
 178  * we expand the functionality of the Limits file to include the
 179  * limit per site, and the mode for uucico.
 180  */
 181 #if (0 == 1)
 182 /*
 183  * this function can only handle the following format
 184  *
 185  *      service=uucico system=ihnp1:ihnp3 [max=5] [mode=master]
 186  *
 187  * return:
 188  *      SUCCESS - OK
 189  *      FAIL - not uucico, no system name in Limits,
 190  *              system's name does not match
 191  */
 192 static int
 193 sitedep(flds, limitval)
 194 char *flds[];
 195 struct limits *limitval;
 196 {
 197
 198         if (!EQUALS(flds[U_SERVICE],"uucico"))
 199                 return FAIL;
 200         if ((flds[U_SYSTEM] == CNULL) || (sysmatch(flds[U_SYSTEM]) != 0))
 201                 return FAIL;
 202         if (flds[U_MAX] == CNULL)
 203                 limitval->sitemax = 1; /* default value */
 204         else if (sscanf(flds[U_MAX],"%d",&limitval->sitemax)==0)
 205                         limitval->sitemax = -1; /* type conflict*/
 206
 207         if (flds[U_MODE] == CNULL)
 208                 strcpy(limitval->mode,"master:slave");
 209         else
 210                 strncpy(limitval->mode,flds[U_MODE],strlen(flds[U_MODE]));
 211         return(SUCCESS);
 212 }
 213
 214 /*
 215  * this function checks if system in system's list
 216  * system=ihnp1:ihnp3:...
 217  *
 218  * return:
 219  *      SUCCESS - OK
 220  */
 221 static int
 222 sysmatch(p)
 223 char *p;
 224 {
 225         char *arg;
 226
 227         while (p && *p) {
 228                 p = nextarg(p, &arg);
 229                 if (EQUALS(arg, Rmtname))
 230                         return(SUCCESS);
 231         }
 232         return FAIL;
 233 }
 234
 235 #endif