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) strcpy(a,b)
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)
236 if (!*s) exit_cleanup(1);
240 /***************************************************************************
241 add a new service to the services array initialising it with the given
243 ***************************************************************************/
244 static int add_a_service(service *pservice, char *name)
248 int num_to_alloc = iNumServices+1;
250 tservice = *pservice;
252 /* it might already exist */
255 i = getservicebyname(name,NULL);
262 ServicePtrs = (service **)Realloc(ServicePtrs,sizeof(service *)*num_to_alloc);
264 pSERVICE(iNumServices) = (service *)malloc(sizeof(service));
266 if (!ServicePtrs || !pSERVICE(iNumServices))
271 init_service(pSERVICE(i));
272 copy_service(pSERVICE(i),&tservice);
274 string_set(&iSERVICE(i).name,name);
279 /***************************************************************************
280 Do a case-insensitive, whitespace-ignoring string compare.
281 ***************************************************************************/
282 static int strwicmp(char *psz1, char *psz2)
284 /* if BOTH strings are NULL, return TRUE, if ONE is NULL return */
285 /* appropriate value. */
295 /* sync the strings on first non-whitespace */
298 while (isspace(*psz1))
300 while (isspace(*psz2))
302 if (toupper(*psz1) != toupper(*psz2) || *psz1 == '\0' || *psz2 == '\0')
307 return (*psz1 - *psz2);
310 /***************************************************************************
311 Map a parameter's string representation to something we can use.
312 Returns False if the parameter string is not recognised, else TRUE.
313 ***************************************************************************/
314 static int map_parameter(char *parmname)
318 if (*parmname == '-')
321 for (iIndex = 0; parm_table[iIndex].label; iIndex++)
322 if (strwicmp(parm_table[iIndex].label, parmname) == 0)
325 rprintf(FERROR, "Unknown parameter encountered: \"%s\"\n", parmname);
330 /***************************************************************************
331 Set a boolean variable from the text value stored in the passed string.
332 Returns True in success, False if the passed string does not correctly
334 ***************************************************************************/
335 static BOOL set_boolean(BOOL *pb, char *parmvalue)
340 if (strwicmp(parmvalue, "yes") == 0 ||
341 strwicmp(parmvalue, "true") == 0 ||
342 strwicmp(parmvalue, "1") == 0)
345 if (strwicmp(parmvalue, "no") == 0 ||
346 strwicmp(parmvalue, "False") == 0 ||
347 strwicmp(parmvalue, "0") == 0)
351 rprintf(FERROR, "Badly formed boolean in configuration file: \"%s\".\n",
358 /***************************************************************************
359 Find a service by name. Otherwise works like get_service.
360 ***************************************************************************/
361 static int getservicebyname(char *name, service *pserviceDest)
365 for (iService = iNumServices - 1; iService >= 0; iService--)
366 if (strwicmp(iSERVICE(iService).name, name) == 0)
368 if (pserviceDest != NULL)
369 copy_service(pserviceDest, pSERVICE(iService));
378 /***************************************************************************
379 Copy a service structure to another
381 ***************************************************************************/
382 static void copy_service(service *pserviceDest,
383 service *pserviceSource)
387 for (i=0;parm_table[i].label;i++)
388 if (parm_table[i].ptr && parm_table[i].class == P_LOCAL) {
389 void *def_ptr = parm_table[i].ptr;
391 ((char *)pserviceSource) + PTR_DIFF(def_ptr,&sDefault);
393 ((char *)pserviceDest) + PTR_DIFF(def_ptr,&sDefault);
395 switch (parm_table[i].type)
399 *(BOOL *)dest_ptr = *(BOOL *)src_ptr;
405 *(int *)dest_ptr = *(int *)src_ptr;
409 *(char *)dest_ptr = *(char *)src_ptr;
413 string_set(dest_ptr,*(char **)src_ptr);
423 /***************************************************************************
424 Process a parameter for a particular service number. If snum < 0
425 then assume we are in the globals
426 ***************************************************************************/
427 static BOOL lp_do_parameter(int snum, char *parmname, char *parmvalue)
430 void *parm_ptr=NULL; /* where we are going to store the result */
433 parmnum = map_parameter(parmname);
437 rprintf(FERROR, "Ignoring unknown parameter \"%s\"\n", parmname);
441 def_ptr = parm_table[parmnum].ptr;
443 /* we might point at a service, the default service or a global */
447 if (parm_table[parmnum].class == P_GLOBAL) {
448 rprintf(FERROR, "Global parameter %s found in service section!\n",parmname);
451 parm_ptr = ((char *)pSERVICE(snum)) + PTR_DIFF(def_ptr,&sDefault);
454 /* now switch on the type of variable it is */
455 switch (parm_table[parmnum].type)
458 set_boolean(parm_ptr,parmvalue);
462 set_boolean(parm_ptr,parmvalue);
463 *(BOOL *)parm_ptr = ! *(BOOL *)parm_ptr;
467 *(int *)parm_ptr = atoi(parmvalue);
471 *(char *)parm_ptr = *parmvalue;
475 sscanf(parmvalue,"%o",(int *)parm_ptr);
479 string_set(parm_ptr,parmvalue);
483 strcpy((char *)parm_ptr,parmvalue);
487 for (i=0;parm_table[parmnum].enum_list[i].name;i++) {
488 if (strequal(parmvalue, parm_table[parmnum].enum_list[i].name)) {
489 *(int *)parm_ptr = parm_table[parmnum].enum_list[i].value;
501 /***************************************************************************
503 ***************************************************************************/
504 static BOOL do_parameter(char *parmname, char *parmvalue)
506 return lp_do_parameter(bInGlobalSection?-2:iServiceIndex, parmname, parmvalue);
509 /***************************************************************************
510 Process a new section (service). At this stage all sections are services.
511 Later we'll have special sections that permit server parameters to be set.
512 Returns True on success, False on failure.
513 ***************************************************************************/
514 static BOOL do_section(char *sectionname)
517 BOOL isglobal = (strwicmp(sectionname, GLOBAL_NAME) == 0);
520 /* if we were in a global section then do the local inits */
521 if (bInGlobalSection && !isglobal)
524 /* if we've just struck a global section, note the fact. */
525 bInGlobalSection = isglobal;
527 /* check for multiple global sections */
528 if (bInGlobalSection)
533 /* if we have a current service, tidy it up before moving on */
536 if (iServiceIndex >= 0)
539 /* if all is still well, move to the next record in the services array */
542 /* We put this here to avoid an odd message order if messages are */
543 /* issued by the post-processing of a previous section. */
545 if ((iServiceIndex=add_a_service(&sDefault,sectionname)) < 0)
547 rprintf(FERROR,"Failed to add a new service\n");
556 /***************************************************************************
557 Load the services array from the services file. Return True on success,
559 ***************************************************************************/
560 BOOL lp_load(char *pszFname)
567 bInGlobalSection = True;
571 pstrcpy(n2,pszFname);
573 /* We get sections first, so have to start 'behind' to make up */
575 bRetval = pm_process(n2, do_section, do_parameter);
583 /***************************************************************************
584 return the max number of services
585 ***************************************************************************/
586 int lp_numservices(void)
588 return(iNumServices);
591 /***************************************************************************
592 Return the number of the service with the given name, or -1 if it doesn't
593 exist. Note that this is a DIFFERENT ANIMAL from the internal function
594 getservicebyname()! This works ONLY if all services have been loaded, and
595 does not copy the found service.
596 ***************************************************************************/
597 int lp_number(char *name)
601 for (iService = iNumServices - 1; iService >= 0; iService--)
602 if (strequal(lp_name(iService), name))