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- /* rdperm.c
- Read the HDB Permissions file.
-
- Copyright (C) 1992, 1993 Ian Lance Taylor
-
- This file is part of the Taylor UUCP uuconf library.
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License
- as published by the Free Software Foundation; either version 2 of
- the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- The author of the program may be contacted at ian@airs.com or
- c/o Cygnus Support, 48 Grove Street, Somerville, MA 02144.
- */
-
- #include "uucnfi.h"
-
- #if USE_RCS_ID
- const char _uuconf_rdperm_rcsid[] = "$Id: rdperm.c,v 1.9 1995/06/21 19:23:54 ian Rel $";
- #endif
-
- #include <errno.h>
- #include <ctype.h>
-
- static int ihcolon P((pointer pglobal, int argc, char **argv, pointer pvar,
- pointer pinfo));
- static int ihsendfiles P((pointer pglobal, int argc, char **argv,
- pointer pvar, pointer pinfo));
- static int ihunknownperm P((pointer pglobal, int argc, char **argv,
- pointer pvar, pointer pinfo));
- static int ihadd_norw P((struct sglobal *qglobal, char ***ppz, char **pzno));
-
- /* These routines reads in the HDB Permissions file. We store the
- entries in a linked list of shpermissions structures, so we only
- have to actually read the file once. */
-
- /* This command table and static structure are used to parse a line
- from Permissions. The entries are parsed as follows:
-
- Multiple strings separated by colons: LOGNAME, MACHINE, READ,
- WRITE, NOREAD, NOWRITE, COMMANDS, VALIDATE, ALIAS.
-
- Boolean values: REQUEST, CALLBACK.
-
- Simple strings: MYNAME, PUBDIR.
-
- "Yes" or "call": SENDFILES.
-
- The NOREAD and NOWRITE entries are merged into the READ and WRITE
- entries, rather than being permanently stored. They are handled
- specially in the uuconf_cmdtab table. */
-
- static const struct cmdtab_offset asHperm_cmds[] =
- {
- { "NOREAD", UUCONF_CMDTABTYPE_FN | 2, (size_t) -1, ihcolon },
- { "NOWRITE", UUCONF_CMDTABTYPE_FN | 2, (size_t) -1, ihcolon },
- { "LOGNAME", UUCONF_CMDTABTYPE_FN | 2,
- offsetof (struct shpermissions, pzlogname), ihcolon },
- { "MACHINE", UUCONF_CMDTABTYPE_FN | 2,
- offsetof (struct shpermissions, pzmachine), ihcolon },
- { "REQUEST", UUCONF_CMDTABTYPE_BOOLEAN,
- offsetof (struct shpermissions, frequest), NULL },
- { "SENDFILES", UUCONF_CMDTABTYPE_FN | 2,
- offsetof (struct shpermissions, fsendfiles), ihsendfiles },
- { "READ", UUCONF_CMDTABTYPE_FN | 2,
- offsetof (struct shpermissions, pzread), ihcolon },
- { "WRITE", UUCONF_CMDTABTYPE_FN | 2,
- offsetof (struct shpermissions, pzwrite), ihcolon },
- { "CALLBACK", UUCONF_CMDTABTYPE_BOOLEAN,
- offsetof (struct shpermissions, fcallback), NULL },
- { "COMMANDS", UUCONF_CMDTABTYPE_FN | 2,
- offsetof (struct shpermissions, pzcommands), ihcolon },
- { "VALIDATE", UUCONF_CMDTABTYPE_FN | 2,
- offsetof (struct shpermissions, pzvalidate), ihcolon },
- { "MYNAME", UUCONF_CMDTABTYPE_STRING,
- offsetof (struct shpermissions, zmyname), NULL },
- { "PUBDIR", UUCONF_CMDTABTYPE_STRING,
- offsetof (struct shpermissions, zpubdir), NULL },
- { "ALIAS", UUCONF_CMDTABTYPE_FN | 2,
- offsetof (struct shpermissions, pzalias), ihcolon },
- { NULL, 0, 0, NULL }
- };
-
- #define CHPERM_CMDS (sizeof asHperm_cmds / sizeof asHperm_cmds[0])
-
- /* Actually read the Permissions file into a linked list of
- structures. */
-
- int
- _uuconf_ihread_permissions (qglobal)
- struct sglobal *qglobal;
- {
- char *zperm;
- FILE *e;
- int iret;
- struct uuconf_cmdtab as[CHPERM_CMDS];
- char **pznoread, **pznowrite;
- struct shpermissions shperm;
- char *zline;
- size_t cline;
- char **pzsplit;
- size_t csplit;
- int cchars;
- struct shpermissions *qlist, **pq;
-
- if (qglobal->qprocess->fhdb_read_permissions)
- return UUCONF_SUCCESS;
-
- zperm = (char *) uuconf_malloc (qglobal->pblock,
- (sizeof OLDCONFIGLIB
- + sizeof HDB_PERMISSIONS - 1));
- if (zperm == NULL)
- {
- qglobal->ierrno = errno;
- return UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
- }
-
- memcpy ((pointer) zperm, (pointer) OLDCONFIGLIB,
- sizeof OLDCONFIGLIB - 1);
- memcpy ((pointer) (zperm + sizeof OLDCONFIGLIB - 1),
- (pointer) HDB_PERMISSIONS, sizeof HDB_PERMISSIONS);
-
- e = fopen (zperm, "r");
- if (e == NULL)
- {
- uuconf_free (qglobal->pblock, zperm);
- qglobal->qprocess->fhdb_read_permissions = TRUE;
- return UUCONF_SUCCESS;
- }
-
- _uuconf_ucmdtab_base (asHperm_cmds, CHPERM_CMDS, (char *) &shperm, as);
- as[0].uuconf_pvar = (pointer) &pznoread;
- as[1].uuconf_pvar = (pointer) &pznowrite;
-
- zline = NULL;
- cline = 0;
- pzsplit = NULL;
- csplit = 0;
-
- qlist = NULL;
- pq = &qlist;
-
- qglobal->ilineno = 0;
-
- iret = UUCONF_SUCCESS;
-
- while ((cchars = _uuconf_getline (qglobal, &zline, &cline, e)) > 0)
- {
- int centries;
- struct shpermissions *qnew;
- int i;
-
- ++qglobal->ilineno;
-
- --cchars;
- if (zline[cchars] == '\n')
- zline[cchars] = '\0';
- if (zline[0] == '#')
- continue;
-
- centries = _uuconf_istrsplit (zline, '\0', &pzsplit, &csplit);
- if (centries < 0)
- {
- qglobal->ierrno = errno;
- iret = UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
- break;
- }
-
- if (centries == 0)
- continue;
-
- shperm.pzlogname = (char **) &_uuconf_unset;
- shperm.pzmachine = (char **) &_uuconf_unset;
- shperm.frequest = -1;
- shperm.fsendfiles = -1;
- shperm.pzread = (char **) &_uuconf_unset;
- shperm.pzwrite = (char **) &_uuconf_unset;
- shperm.fcallback = -1;
- shperm.pzcommands = (char **) &_uuconf_unset;
- shperm.pzvalidate = (char **) &_uuconf_unset;
- shperm.zmyname = (char *) &_uuconf_unset;
- shperm.zpubdir = (char *) &_uuconf_unset;
- shperm.pzalias = (char **) &_uuconf_unset;
- pznoread = (char **) &_uuconf_unset;
- pznowrite = (char **) &_uuconf_unset;
-
- for (i = 0; i < centries; i++)
- {
- char *zeq;
- char *azargs[2];
-
- zeq = strchr (pzsplit[i], '=');
- if (zeq == NULL)
- {
- iret = UUCONF_SYNTAX_ERROR;
- qglobal->qprocess->fhdb_read_permissions = TRUE;
- break;
- }
- *zeq = '\0';
-
- azargs[0] = pzsplit[i];
- azargs[1] = zeq + 1;
-
- iret = uuconf_cmd_args (qglobal, 2, azargs, as, (pointer) NULL,
- ihunknownperm, 0, qglobal->pblock);
- if ((iret & UUCONF_CMDTABRET_KEEP) != 0)
- {
- iret &=~ UUCONF_CMDTABRET_KEEP;
-
- if (uuconf_add_block (qglobal->pblock, zline) != 0)
- {
- qglobal->ierrno = errno;
- iret = UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
- break;
- }
-
- zline = NULL;
- cline = 0;
- }
- if ((iret & UUCONF_CMDTABRET_EXIT) != 0)
- {
- iret &=~ UUCONF_CMDTABRET_EXIT;
- break;
- }
- }
-
- if (iret != UUCONF_SUCCESS)
- break;
-
- if (shperm.pzmachine == (char **) &_uuconf_unset
- && shperm.pzlogname == (char **) &_uuconf_unset)
- {
- iret = UUCONF_SYNTAX_ERROR;
- qglobal->qprocess->fhdb_read_permissions = TRUE;
- break;
- }
-
- /* Attach any NOREAD or NOWRITE entries to the corresponding
- READ or WRITE entries in the format expected for the
- pzlocal_receive, etc., fields in uuconf_system. */
- if (pznoread != NULL)
- {
- iret = ihadd_norw (qglobal, &shperm.pzread, pznoread);
- if (iret != UUCONF_SUCCESS)
- break;
- uuconf_free (qglobal->pblock, pznoread);
- }
-
- if (pznowrite != NULL)
- {
- iret = ihadd_norw (qglobal, &shperm.pzwrite, pznowrite);
- if (iret != UUCONF_SUCCESS)
- break;
- uuconf_free (qglobal->pblock, pznowrite);
- }
-
- qnew = ((struct shpermissions *)
- uuconf_malloc (qglobal->pblock,
- sizeof (struct shpermissions)));
- if (qnew == NULL)
- {
- qglobal->ierrno = errno;
- iret = UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
- break;
- }
-
- *qnew = shperm;
- *pq = qnew;
- pq = &qnew->qnext;
- *pq = NULL;
- }
-
- (void) fclose (e);
-
- if (zline != NULL)
- free ((pointer) zline);
- if (pzsplit != NULL)
- free ((pointer) pzsplit);
-
- if (iret == UUCONF_SUCCESS)
- {
- qglobal->qprocess->qhdb_permissions = qlist;
- qglobal->qprocess->fhdb_read_permissions = TRUE;
- }
- else
- {
- qglobal->zfilename = zperm;
- iret |= UUCONF_ERROR_FILENAME | UUCONF_ERROR_LINENO;
- }
-
- return iret;
- }
-
- /* Split the argument into colon separated strings, and assign a NULL
- terminated array of strings to pvar. */
-
- /*ARGSUSED*/
- static int
- ihcolon (pglobal, argc, argv, pvar, pinfo)
- pointer pglobal;
- int argc;
- char **argv;
- pointer pvar;
- pointer pinfo;
- {
- struct sglobal *qglobal = (struct sglobal *) pglobal;
- char ***ppz = (char ***) pvar;
- char **pzsplit;
- size_t csplit;
- int centries;
- int i;
- int iret;
-
- *ppz = NULL;
-
- pzsplit = NULL;
- csplit = 0;
-
- centries = _uuconf_istrsplit (argv[1], ':', &pzsplit, &csplit);
- if (centries < 0)
- {
- qglobal->ierrno = errno;
- return (UUCONF_MALLOC_FAILED
- | UUCONF_ERROR_ERRNO
- | UUCONF_CMDTABRET_EXIT);
- }
-
- if (centries == 0)
- {
- if (pzsplit != NULL)
- free ((pointer) pzsplit);
- return UUCONF_CMDTABRET_CONTINUE;
- }
-
- iret = UUCONF_SUCCESS;
-
- for (i = 0; i < centries; i++)
- {
- iret = _uuconf_iadd_string (qglobal, pzsplit[i], FALSE, FALSE,
- ppz, qglobal->pblock);
- if (iret != UUCONF_SUCCESS)
- {
- iret |= UUCONF_CMDTABRET_EXIT;
- break;
- }
- }
-
- free ((pointer) pzsplit);
-
- return UUCONF_CMDTABRET_KEEP;
- }
-
- /* Handle the SENDFILES parameter, which can take "yes" or "call" or
- "no" as an argument. The string "call" is equivalent to "no". */
-
- /*ARGSUSED*/
- static int
- ihsendfiles (pglobal, argc, argv, pvar, pinfo)
- pointer pglobal;
- int argc;
- char **argv;
- pointer pvar;
- pointer pinfo;
- {
- int *pi = (int *) pvar;
-
- switch (argv[1][0])
- {
- case 'C':
- case 'c':
- case 'N':
- case 'n':
- *pi = FALSE;
- break;
- case 'Y':
- case 'y':
- *pi = TRUE;
- break;
- default:
- return UUCONF_SYNTAX_ERROR | UUCONF_CMDTABRET_EXIT;
- }
-
- return UUCONF_CMDTABRET_CONTINUE;
- }
-
- /* If there is an unknown Permissions entry, return a syntax error.
- This should probably be more clever. */
-
- /*ARGSUSED*/
- static int
- ihunknownperm (pglobal, argc, argv, pvar, pinfo)
- pointer pglobal;
- int argc;
- char **argv;
- pointer pvar;
- pointer pinfo;
- {
- return UUCONF_SYNTAX_ERROR | UUCONF_CMDTABRET_EXIT;
- }
-
- /* Add a NOREAD or NOWRITE entry to a READ or WRITE entry. */
-
- static int
- ihadd_norw (qglobal, ppz, pzno)
- struct sglobal *qglobal;
- char ***ppz;
- char **pzno;
- {
- register char **pz;
-
- if (pzno == (char **) &_uuconf_unset)
- return UUCONF_SUCCESS;
-
- for (pz = pzno; *pz != NULL; pz++)
- {
- size_t csize;
- char *znew;
- int iret;
-
- /* Ignore an attempt to say NOREAD or NOWRITE with an empty
- string, since it will be interpreted as an attempt to deny
- everything. */
- if (**pz != '\0')
- {
- csize = strlen (*pz) + 1;
- znew = (char *) uuconf_malloc (qglobal->pblock, csize + 1);
- if (znew == NULL)
- {
- qglobal->ierrno = errno;
- return UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
- }
- znew[0] = '!';
- memcpy ((pointer) (znew + 1), (pointer) *pz, csize);
- iret = _uuconf_iadd_string (qglobal, znew, FALSE, FALSE, ppz,
- qglobal->pblock);
- if (iret != UUCONF_SUCCESS)
- return iret;
- }
- }
-
- return UUCONF_SUCCESS;
- }
-