1 /* This is based on loadparm.c from Samba, written by Andrew Tridgell
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 * This module provides suitable callback functions for the params
24 * module. It builds the internal table of service details which is
25 * then used by the rest of the server.
29 * 1) add it to the global or service structure definition
30 * 2) add it to the parm_table
31 * 3) add it to the list of available functions (eg: using FN_GLOBAL_STRING())
32 * 4) If it's a global then initialise it in init_globals. If a local
33 * (ie. service) parameter then initialise it in the sDefault structure
37 * The configuration file is processed sequentially for speed. It is NOT
38 * accessed randomly as happens in 'real' Windows. For this reason, there
39 * is a fair bit of sequence-dependent code here - ie., code which assumes
40 * that certain things happen before others. In particular, the code which
41 * happens at the boundary between sections is delicately poised, so be
50 #define Realloc realloc
51 #define PTR_DIFF(p1,p2) ((ptrdiff_t)(((char *)(p1)) - (char *)(p2)))
52 #define strequal(a,b) (strcasecmp(a,b)==0)
53 #define BOOLSTR(b) ((b) ? "Yes" : "No")
54 typedef char pstring[1024];
55 #define pstrcpy(a,b) strlcpy(a,b,sizeof(pstring)-1)
57 /* the following are used by loadparm for option lists */
60 P_BOOL,P_BOOLREV,P_CHAR,P_INTEGER,P_OCTAL,
61 P_STRING,P_GSTRING,P_ENUM,P_SEP
66 P_LOCAL,P_GLOBAL,P_SEPARATOR,P_NONE
80 struct enum_list *enum_list;
84 static BOOL bLoaded = False;
87 #define GLOBAL_NAME "global"
90 /* some helpful bits */
91 #define pSERVICE(i) ServicePtrs[i]
92 #define iSERVICE(i) (*pSERVICE(i))
93 #define LP_SNUM_OK(iService) (((iService) >= 0) && ((iService) < iNumServices))
96 * This structure describes global (ie., server-wide) parameters.
103 static global Globals;
108 * This structure describes a single service.
122 /* This is a default service used to prime a services structure */
123 static service sDefault =
128 True, /* read only */
136 /* local variables */
137 static service **ServicePtrs = NULL;
138 static int iNumServices = 0;
139 static int iServiceIndex = 0;
140 static BOOL bInGlobalSection = True;
142 #define NUMPARAMETERS (sizeof(parm_table) / sizeof(struct parm_struct))
145 /* note that we do not initialise the defaults union - it is not allowed in ANSI C */
146 static struct parm_struct parm_table[] =
148 {"motd file", P_STRING, P_GLOBAL, &Globals.motd_file, NULL, 0},
149 {"name", P_STRING, P_LOCAL, &sDefault.name, NULL, 0},
150 {"comment", P_STRING, P_LOCAL, &sDefault.comment, NULL, 0},
151 {"path", P_STRING, P_LOCAL, &sDefault.path, NULL, 0},
152 {"read only", P_BOOL, P_LOCAL, &sDefault.read_only, NULL, 0},
153 {"list", P_BOOL, P_LOCAL, &sDefault.list, NULL, 0},
154 {"uid", P_STRING, P_LOCAL, &sDefault.uid, NULL, 0},
155 {"gid", P_STRING, P_LOCAL, &sDefault.gid, NULL, 0},
156 {NULL, P_BOOL, P_NONE, NULL, NULL, 0}
160 /***************************************************************************
161 Initialise the global parameter structure.
162 ***************************************************************************/
163 static void init_globals(void)
167 /***************************************************************************
168 Initialise the sDefault parameter structure.
169 ***************************************************************************/
170 static void init_locals(void)
176 In this section all the functions that are used to access the
177 parameters from the rest of the program are defined
180 #define FN_GLOBAL_STRING(fn_name,ptr) \
181 char *fn_name(void) {return(*(char **)(ptr) ? *(char **)(ptr) : "");}
182 #define FN_GLOBAL_BOOL(fn_name,ptr) \
183 BOOL fn_name(void) {return(*(BOOL *)(ptr));}
184 #define FN_GLOBAL_CHAR(fn_name,ptr) \
185 char fn_name(void) {return(*(char *)(ptr));}
186 #define FN_GLOBAL_INTEGER(fn_name,ptr) \
187 int fn_name(void) {return(*(int *)(ptr));}
189 #define FN_LOCAL_STRING(fn_name,val) \
190 char *fn_name(int i) {return((LP_SNUM_OK(i)&&pSERVICE(i)->val)?pSERVICE(i)->val : (sDefault.val?sDefault.val:""));}
191 #define FN_LOCAL_BOOL(fn_name,val) \
192 BOOL fn_name(int i) {return(LP_SNUM_OK(i)? pSERVICE(i)->val : sDefault.val);}
193 #define FN_LOCAL_CHAR(fn_name,val) \
194 char fn_name(int i) {return(LP_SNUM_OK(i)? pSERVICE(i)->val : sDefault.val);}
195 #define FN_LOCAL_INTEGER(fn_name,val) \
196 int fn_name(int i) {return(LP_SNUM_OK(i)? pSERVICE(i)->val : sDefault.val);}
199 FN_GLOBAL_STRING(lp_motd_file, &Globals.motd_file)
200 FN_LOCAL_STRING(lp_name, name)
201 FN_LOCAL_STRING(lp_comment, comment)
202 FN_LOCAL_STRING(lp_path, path)
203 FN_LOCAL_BOOL(lp_read_only, read_only)
204 FN_LOCAL_BOOL(lp_list, list)
205 FN_LOCAL_STRING(lp_uid, uid)
206 FN_LOCAL_STRING(lp_gid, gid)
208 /* local prototypes */
209 static int strwicmp( char *psz1, char *psz2 );
210 static int map_parameter( char *parmname);
211 static BOOL set_boolean( BOOL *pb, char *parmvalue );
212 static int getservicebyname(char *name, service *pserviceDest);
213 static void copy_service( service *pserviceDest,
214 service *pserviceSource);
215 static BOOL do_parameter(char *parmname, char *parmvalue);
216 static BOOL do_section(char *sectionname);
219 /***************************************************************************
220 initialise a service to the defaults
221 ***************************************************************************/
222 static void init_service(service *pservice)
224 bzero((char *)pservice,sizeof(service));
225 copy_service(pservice,&sDefault);
228 static void string_set(char **s, char *v)
235 if (!*s) exit_cleanup(1);
239 /***************************************************************************
240 add a new service to the services array initialising it with the given
242 ***************************************************************************/
243 static int add_a_service(service *pservice, char *name)
247 int num_to_alloc = iNumServices+1;
249 tservice = *pservice;
251 /* it might already exist */
254 i = getservicebyname(name,NULL);
261 ServicePtrs = (service **)Realloc(ServicePtrs,sizeof(service *)*num_to_alloc);
263 pSERVICE(iNumServices) = (service *)malloc(sizeof(service));
265 if (!ServicePtrs || !pSERVICE(iNumServices))
270 init_service(pSERVICE(i));
271 copy_service(pSERVICE(i),&tservice);
273 string_set(&iSERVICE(i).name,name);
278 /***************************************************************************
279 Do a case-insensitive, whitespace-ignoring string compare.
280 ***************************************************************************/
281 static int strwicmp(char *psz1, char *psz2)
283 /* if BOTH strings are NULL, return TRUE, if ONE is NULL return */
284 /* appropriate value. */
294 /* sync the strings on first non-whitespace */
297 while (isspace(*psz1))
299 while (isspace(*psz2))
301 if (toupper(*psz1) != toupper(*psz2) || *psz1 == '\0' || *psz2 == '\0')
306 return (*psz1 - *psz2);
309 /***************************************************************************
310 Map a parameter's string representation to something we can use.
311 Returns False if the parameter string is not recognised, else TRUE.
312 ***************************************************************************/
313 static int map_parameter(char *parmname)
317 if (*parmname == '-')
320 for (iIndex = 0; parm_table[iIndex].label; iIndex++)
321 if (strwicmp(parm_table[iIndex].label, parmname) == 0)
324 rprintf(FERROR, "Unknown parameter encountered: \"%s\"\n", parmname);
329 /***************************************************************************
330 Set a boolean variable from the text value stored in the passed string.
331 Returns True in success, False if the passed string does not correctly
333 ***************************************************************************/
334 static BOOL set_boolean(BOOL *pb, char *parmvalue)
339 if (strwicmp(parmvalue, "yes") == 0 ||
340 strwicmp(parmvalue, "true") == 0 ||
341 strwicmp(parmvalue, "1") == 0)
344 if (strwicmp(parmvalue, "no") == 0 ||
345 strwicmp(parmvalue, "False") == 0 ||
346 strwicmp(parmvalue, "0") == 0)
350 rprintf(FERROR, "Badly formed boolean in configuration file: \"%s\".\n",
357 /***************************************************************************
358 Find a service by name. Otherwise works like get_service.
359 ***************************************************************************/
360 static int getservicebyname(char *name, service *pserviceDest)
364 for (iService = iNumServices - 1; iService >= 0; iService--)
365 if (strwicmp(iSERVICE(iService).name, name) == 0)
367 if (pserviceDest != NULL)
368 copy_service(pserviceDest, pSERVICE(iService));
377 /***************************************************************************
378 Copy a service structure to another
380 ***************************************************************************/
381 static void copy_service(service *pserviceDest,
382 service *pserviceSource)
386 for (i=0;parm_table[i].label;i++)
387 if (parm_table[i].ptr && parm_table[i].class == P_LOCAL) {
388 void *def_ptr = parm_table[i].ptr;
390 ((char *)pserviceSource) + PTR_DIFF(def_ptr,&sDefault);
392 ((char *)pserviceDest) + PTR_DIFF(def_ptr,&sDefault);
394 switch (parm_table[i].type)
398 *(BOOL *)dest_ptr = *(BOOL *)src_ptr;
404 *(int *)dest_ptr = *(int *)src_ptr;
408 *(char *)dest_ptr = *(char *)src_ptr;
412 string_set(dest_ptr,*(char **)src_ptr);
422 /***************************************************************************
423 Process a parameter for a particular service number. If snum < 0
424 then assume we are in the globals
425 ***************************************************************************/
426 static BOOL lp_do_parameter(int snum, char *parmname, char *parmvalue)
429 void *parm_ptr=NULL; /* where we are going to store the result */
432 parmnum = map_parameter(parmname);
436 rprintf(FERROR, "Ignoring unknown parameter \"%s\"\n", parmname);
440 def_ptr = parm_table[parmnum].ptr;
442 /* we might point at a service, the default service or a global */
446 if (parm_table[parmnum].class == P_GLOBAL) {
447 rprintf(FERROR, "Global parameter %s found in service section!\n",parmname);
450 parm_ptr = ((char *)pSERVICE(snum)) + PTR_DIFF(def_ptr,&sDefault);
453 /* now switch on the type of variable it is */
454 switch (parm_table[parmnum].type)
457 set_boolean(parm_ptr,parmvalue);
461 set_boolean(parm_ptr,parmvalue);
462 *(BOOL *)parm_ptr = ! *(BOOL *)parm_ptr;
466 *(int *)parm_ptr = atoi(parmvalue);
470 *(char *)parm_ptr = *parmvalue;
474 sscanf(parmvalue,"%o",(int *)parm_ptr);
478 string_set(parm_ptr,parmvalue);
482 strcpy((char *)parm_ptr,parmvalue);
486 for (i=0;parm_table[parmnum].enum_list[i].name;i++) {
487 if (strequal(parmvalue, parm_table[parmnum].enum_list[i].name)) {
488 *(int *)parm_ptr = parm_table[parmnum].enum_list[i].value;
500 /***************************************************************************
502 ***************************************************************************/
503 static BOOL do_parameter(char *parmname, char *parmvalue)
505 return lp_do_parameter(bInGlobalSection?-2:iServiceIndex, parmname, parmvalue);
508 /***************************************************************************
509 Process a new section (service). At this stage all sections are services.
510 Later we'll have special sections that permit server parameters to be set.
511 Returns True on success, False on failure.
512 ***************************************************************************/
513 static BOOL do_section(char *sectionname)
516 BOOL isglobal = (strwicmp(sectionname, GLOBAL_NAME) == 0);
519 /* if we were in a global section then do the local inits */
520 if (bInGlobalSection && !isglobal)
523 /* if we've just struck a global section, note the fact. */
524 bInGlobalSection = isglobal;
526 /* check for multiple global sections */
527 if (bInGlobalSection)
532 /* if we have a current service, tidy it up before moving on */
535 if (iServiceIndex >= 0)
538 /* if all is still well, move to the next record in the services array */
541 /* We put this here to avoid an odd message order if messages are */
542 /* issued by the post-processing of a previous section. */
544 if ((iServiceIndex=add_a_service(&sDefault,sectionname)) < 0)
546 rprintf(FERROR,"Failed to add a new service\n");
555 /***************************************************************************
556 Load the services array from the services file. Return True on success,
558 ***************************************************************************/
559 BOOL lp_load(char *pszFname)
566 bInGlobalSection = True;
570 pstrcpy(n2,pszFname);
572 /* We get sections first, so have to start 'behind' to make up */
574 bRetval = pm_process(n2, do_section, do_parameter);
582 /***************************************************************************
583 return the max number of services
584 ***************************************************************************/
585 int lp_numservices(void)
587 return(iNumServices);
590 /***************************************************************************
591 Return the number of the service with the given name, or -1 if it doesn't
592 exist. Note that this is a DIFFERENT ANIMAL from the internal function
593 getservicebyname()! This works ONLY if all services have been loaded, and
594 does not copy the found service.
595 ***************************************************************************/
596 int lp_number(char *name)
600 for (iService = iNumServices - 1; iService >= 0; iService--)
601 if (strequal(lp_name(iService), name))