pop_parse.c
上传用户:dayuan858
上传日期:2007-01-04
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文件大小:2k
- /*
- * Copyright (c) 1989 Regents of the University of California.
- * All rights reserved. The Berkeley software License Agreement
- * specifies the terms and conditions for redistribution.
- */
- /*
- * Copyright (c) 1997 by Qualcomm Incorporated.
- */
- #include <config.h>
- #include <stdio.h>
- #include <sys/types.h>
- #include <ctype.h>
- #include "popper.h"
- /*
- * parse: Parse a raw input line from a POP client
- * into null-delimited tokens
- */
- pop_parse(p,buf)
- POP * p;
- char * buf; /* Pointer to a message containing
- the line from the client */
- {
- char * mp;
- register int i;
-
- /* Loop through the POP command array */
- for (mp = buf, i = 0; ; i++) {
-
- /* Skip leading spaces and tabs in the message */
- while (isspace(*mp))mp++;
- /* Are we at the end of the message? */
- if (*mp == 0) break;
- /* Have we already obtained the maximum allowable parameters? */
- if (i >= MAXPARMCOUNT) {
- pop_msg(p,POP_FAILURE,"Too many arguments supplied.");
- return(-1);
- }
- /* Point to the start of the token */
- p->pop_parm[i] = mp;
- /* Search for the first space character (end of the token) */
- while (!isspace(*mp) && *mp) mp++;
- /* Delimit the token with a null */
- if (*mp) *mp++ = 0;
- if (i == 0) {
- /* Convert the first token (POP command) to lower case */
- pop_lower(p->pop_command);
- /*
- * This is kinda gross. Passwords have to be parsed diffrently
- * as they may contain spaces. If you think of a cleaner way,
- * do it. The "p->pop_command[0] == 'p'" is so save a call to
- * strcmp() on ever call to pop_parse(); This parsing keeps
- * leading and trailing speces behind for the password command.
- */
- if(p->pop_command[0] == 'p' && strcmp(p->pop_command,"pass") == 0) {
- if (*mp != 0) {
- p->pop_parm[1] = mp;
- if (strlen(mp) > 0) {
- mp = mp + strlen(mp) - 1;
- while (*mp == 0xa || *mp == 0xd) *mp-- = 0;
- }
- return(1);
- } else
- return (-1);
- }
- }
- }
- /* Were any parameters passed at all? */
- if (i == 0) return (-1);
- /* Return the number of tokens extracted minus the command itself */
- return (i-1);
-
- }