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- /* parse.c
- Parse a UUCP command string.
-
- Copyright (C) 1991, 1992, 1993 Ian Lance Taylor
-
- This file is part of the Taylor UUCP package.
-
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- This program 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
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; 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 "uucp.h"
-
- #if USE_RCS_ID
- const char parse_rcsid[] = "$Id: parse.c,v 1.8 1995/06/21 19:18:35 ian Rel $";
- #endif
-
- #include "uudefs.h"
-
- /* Parse a UUCP command string into an scmd structure. This is called
- by the 'g' protocol and the UNIX command file reading routines. It
- destroys the string it is passed, and the scmd string pointers are
- left pointing into it. For the convenience of the Unix work file
- routines, it will parse "P" into a simple 'P' command (representing
- a poll file). It returns TRUE if the string is successfully
- parsed, FALSE otherwise. */
-
- boolean
- fparse_cmd (zcmd, qcmd)
- char *zcmd;
- struct scmd *qcmd;
- {
- char *z, *zend;
-
- z = strtok (zcmd, " \t\n");
- if (z == NULL)
- return FALSE;
-
- qcmd->bcmd = *z;
- if (qcmd->bcmd != 'S'
- && qcmd->bcmd != 'R'
- && qcmd->bcmd != 'X'
- && qcmd->bcmd != 'E'
- && qcmd->bcmd != 'H'
- && qcmd->bcmd != 'P')
- return FALSE;
-
- qcmd->bgrade = '\0';
- qcmd->pseq = NULL;
- qcmd->zfrom = NULL;
- qcmd->zto = NULL;
- qcmd->zuser = NULL;
- qcmd->zoptions = NULL;
- qcmd->ztemp = NULL;
- qcmd->imode = 0666;
- qcmd->znotify = NULL;
- qcmd->cbytes = -1;
- qcmd->zcmd = NULL;
- qcmd->ipos = 0;
-
- /* Handle hangup commands specially. If it's just "H", return
- the command 'H' to indicate a hangup request. If it's "HY"
- return 'Y' and if it's "HN" return 'N'. */
- if (qcmd->bcmd == 'H')
- {
- if (z[1] != '\0')
- {
- if (z[1] == 'Y')
- qcmd->bcmd = 'Y';
- else if (z[1] == 'N')
- qcmd->bcmd = 'N';
- else
- return FALSE;
- }
-
- return TRUE;
- }
- if (qcmd->bcmd == 'P')
- return TRUE;
-
- if (z[1] != '\0')
- return FALSE;
-
- z = strtok ((char *) NULL, " \t\n");
- if (z == NULL)
- return FALSE;
- qcmd->zfrom = z;
-
- z = strtok ((char *) NULL, " \t\n");
- if (z == NULL)
- return FALSE;
- qcmd->zto = z;
-
- z = strtok ((char *) NULL, " \t\n");
- if (z == NULL)
- return FALSE;
- qcmd->zuser = z;
-
- z = strtok ((char *) NULL, " \t\n");
- if (z == NULL || *z != '-')
- return FALSE;
- qcmd->zoptions = z + 1;
-
- if (qcmd->bcmd == 'X')
- return TRUE;
-
- if (qcmd->bcmd == 'R')
- {
- z = strtok ((char *) NULL, " \t\n");
- if (z != NULL)
- {
- if (strcmp (z, "dummy") != 0)
- {
- /* This may be the maximum number of bytes the remote
- system wants to receive, if it using Taylor UUCP size
- negotiation. */
- qcmd->cbytes = strtol (z, &zend, 0);
- if (*zend != '\0')
- qcmd->cbytes = -1;
- }
- else
- {
- /* This is from an SVR4 system, and may include the
- position at which to start sending the file. The
- next fields are the mode bits, the remote owner (?),
- the remote temporary file name, and finally the
- restart position. */
- if (strtok ((char *) NULL, " \t\n") != NULL
- && strtok ((char *) NULL, " \t\n") != NULL
- && strtok ((char *) NULL, " \t\n") != NULL)
- {
- z = strtok ((char *) NULL, " \t\n");
- if (z != NULL)
- {
- qcmd->ipos = strtol (z, &zend, 0);
- if (*zend != '\0')
- qcmd->ipos = 0;
- }
- }
- }
- }
-
- return TRUE;
- }
-
- z = strtok ((char *) NULL, " \t\n");
- if (z == NULL)
- return FALSE;
- qcmd->ztemp = z;
-
- z = strtok ((char *) NULL, " \t\n");
- if (z == NULL)
- return FALSE;
- qcmd->imode = (int) strtol (z, &zend, 0);
- if (*zend != '\0')
- return FALSE;
-
- /* As a magic special case, if the mode came out as the decimal
- values 666 or 777, assume that they actually meant the octal
- values. Most systems use a leading zero, but a few do not.
- Since both 666 and 777 are greater than the largest legal mode
- value, which is 0777 == 511, this hack does not restrict any
- legal values. */
- if (qcmd->imode == 666)
- qcmd->imode = 0666;
- else if (qcmd->imode == 777)
- qcmd->imode = 0777;
-
- z = strtok ((char *) NULL, " \t\n");
- if (qcmd->bcmd == 'E' && z == NULL)
- return FALSE;
- qcmd->znotify = z;
-
- /* SVR4 UUCP will send the string "dummy" after the notify string
- but before the size. I do not know when it sends anything other
- than "dummy". Fortunately, it doesn't really hurt to not get the
- file size. */
- if (z != NULL && strcmp (z, "dummy") == 0)
- z = strtok ((char *) NULL, " \t\n");
-
- if (z != NULL)
- {
- z = strtok ((char *) NULL, " \t\n");
- if (z != NULL)
- {
- qcmd->cbytes = strtol (z, &zend, 0);
- if (*zend != '\0')
- qcmd->cbytes = -1;
- }
- else if (qcmd->bcmd == 'E')
- return FALSE;
-
- if (z != NULL)
- {
- z = strtok ((char *) NULL, "");
- if (z != NULL)
- z[strcspn (z, "\n")] = '\0';
- if (qcmd->bcmd == 'E' && z == NULL)
- return FALSE;
- qcmd->zcmd = z;
- }
- }
-
- return TRUE;
- }
-