expect.c
上传用户:mei_mei897
上传日期:2007-01-05
资源大小:82k
文件大小:8k
- /* -------------------------------------------------------------------- */
- /* SMS Client, send messages to mobile phones and pagers */
- /* */
- /* expect.c */
- /* */
- /* Copyright (C) 1997,1998 Angelo Masci */
- /* */
- /* 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
- /* */
- /* You can contact the author at this e-mail address: */
- /* */
- /* angelo@styx.demon.co.uk */
- /* */
- /* -------------------------------------------------------------------- */
- /* $Id: expect.c,v 5.1 1998/02/01 07:10:39 root Exp root $
- -------------------------------------------------------------------- */
- #include <stdio.h>
- #include <errno.h>
- #include <signal.h>
- #include <string.h>
- #include <unistd.h>
- #include <errno.h>
- #include <stdlib.h>
- #include "common.h"
- #include "logfile.h"
- #include "sms_error.h"
- /* -------------------------------------------------------------------- */
- #define MAX_LINE 4096
- static int caught_alarm = 0;
- /* -------------------------------------------------------------------- */
- static void signal_alarm(int);
- static int expread(int, char *);
- static int expwrite(int, char *);
- /* -------------------------------------------------------------------- */
- /* -------------------------------------------------------------------- */
- static void signal_alarm(int signo)
- {
- caught_alarm = 1;
- return;
- }
- /* -------------------------------------------------------------------- */
- /* Read explen characters from fd and copy to str, */
- /* appending ' '. Compare explen characters of str with expect_string. */
- /* */
- /* Return Values: */
- /* */
- /* 0 Expect_string is found before timeout expires */
- /* -1 Error or Timeout exceeded */
- /* */
- /* -------------------------------------------------------------------- */
- int expnstr(int fd, char *str, char *expect_string, int explen, int timeout)
- {
- int i;
- char *ptr;
- /* ---------------------------- */
-
- caught_alarm = 0;
- if (signal(SIGALRM, signal_alarm) == SIG_ERR)
- { exit(ESIGERR);
- }
- alarm(timeout);
- ptr = str;
- for (i=0; i<explen; i++)
- {
- switch (expread(fd, ptr))
- {
- case 1:
- { ptr++;
- break;
- }
- case 0:
- {
- *ptr = ' ';
- lprintf(LOG_WARNING, "EOF Detectedn");
- alarm(0);
- return -1;
- }
- default:
- {
- /* Timeout */
- *ptr = ' ';
- lprintf(LOG_ERROR, "Timeout: searching for +%s+ failed after %d secondsn", expect_string, timeout);
- lprintf(LOG_VERBOSE, "Received: +%s+n", str);
- alarm(0);
- return -1;
- }
- }
- }
-
- if (strncmp(str, expect_string, explen) == 0)
- {
- *ptr = ' ';
- lprintf(LOG_VERBOSE, "Received: +%s+n", str);
-
- alarm(0);
- return 0;
- }
- *ptr = ' ';
- lprintf(LOG_VERBOSE, "Received: +%s+n", str);
- alarm(0);
- return -1;
- }
- /* -------------------------------------------------------------------- */
- /* Read from open file fd and search for expect_string. */
- /* All data read is placed in str and terminated with ' ' */
- /* Return Values: */
- /* */
- /* 0 Expect_string is found before timeout expires */
- /* -1 Error errno is set appropriately. */
- /* */
- /* Errors: */
- /* */
- /* ETIMEOUT Timeout exceeded */
- /* EEOF End of File encountered */
- /* ELEN Buffer length exceeded */
- /* */
- /* -------------------------------------------------------------------- */
- int expstr(int fd, char *str, char *expect_string, int maxlen, int timeout)
- {
- int explen,
- i,
- len;
- char *ptr,
- *cmpptr;
-
- /* ---------------------------- */
-
- explen = sms_strlen(expect_string);
- caught_alarm = 0;
- if (signal(SIGALRM, signal_alarm) == SIG_ERR)
- { exit(ESIGERR);
- }
- alarm(timeout);
-
- len = 0;
- ptr = str;
- for (i=0; i<explen; i++)
- {
- if (len >= maxlen)
- { alarm(0);
- return -1;
- }
- switch (expread(fd, ptr))
- {
- case 1:
- { ptr++;
- len++;
- break;
- }
- case 0:
- {
- *ptr = ' ';
- alarm(0);
- lprintf(LOG_WARNING, "EOF Detectedn");
- return -1;
- }
- default:
- {
- /* Timeout */
- *ptr = ' ';
- alarm(0);
- lprintf(LOG_ERROR, "Timeout: searching for +%s+ failed after %d secondsn", expect_string, timeout);
- lprintf(LOG_VERBOSE, "Received: +%s+n", str);
- return -1;
- }
- }
- }
- cmpptr = str;
- while (len < (maxlen -1))
- {
- if (strncmp(cmpptr, expect_string, explen) == 0)
- {
- *ptr = ' ';
- alarm(0);
- lprintf(LOG_VERBOSE, "Received: +%s+n", str);
- return 0;
- }
- cmpptr++;
-
- switch (expread(fd, ptr))
- {
- case 1:
- { ptr++;
- len++;
- break;
- }
- case 0:
- {
- *ptr = ' ';
- alarm(0);
- lprintf(LOG_WARNING, "EOF Detectedn");
- return -1;
- }
- default:
- {
- /* Timeout */
- *ptr = ' ';
- alarm(0);
- lprintf(LOG_ERROR, "Timeout: searching for +%s+ failed after %d secondsn", expect_string, timeout);
- lprintf(LOG_VERBOSE, "Received: +%s+n", str);
- return -1;
- }
- }
- }
-
- *ptr = ' ';
- alarm(0);
- lprintf(LOG_ERROR, "Buffer Length exceeded: searching for +%s+ failed after reading %d bytesn", expect_string, (maxlen -1));
- lprintf(LOG_VERBOSE, "Received: +%s+n", str);
- return -1;
- }
- /* -------------------------------------------------------------------- */
- /* -------------------------------------------------------------------- */
- static int expread(int fd, char *buf)
- {
- if (caught_alarm)
- { return -1; /* Timeout */
- }
- reread:
- switch (read(fd, buf, 1))
- {
- case 1:
- lprintf(LOG_VERYVERBOSE, "Received: +%c+n", buf[0]);
- return 1; /* Sucessful Read */
- case -1:
- if (errno == EINTR)
- { if (caught_alarm)
- { return -1; /* Timeout */
- }
- else
- { /* Received an interrupt */
- /* that wasn't our timer */
- /* safely ignore it and */
- /* reread data */
- goto reread;
- }
- }
- else
- { lprintf(LOG_ERROR, "Unknown read error %dn", errno);
- return -1; /* ERROR */
- }
- }
- return 0; /* EOF */
- }
- /* -------------------------------------------------------------------- */
- /* Write len bytes of buf to fd, return prematurely on timeout */
- /* Return Values: */
- /* */
- /* -1 On timeout */
- /* 0 Success */
- /* -------------------------------------------------------------------- */
- int twrite(int fd, char *buf, int len, int timeout)
- {
- char *ptr,
- *line;
- int i;
- /* ---------------------------- */
- caught_alarm = 0;
- if (signal(SIGALRM, signal_alarm) == SIG_ERR)
- { exit(ESIGERR);
- }
- alarm(timeout);
-
- ptr = buf;
- for (i=0; i<len; i++)
- {
- if (expwrite(fd, ptr) != 1)
- {
- /* Timeout */
- alarm(0);
- lprintf(LOG_ERROR, "Timeout: Written %d characters of +%s+ failed after %d secondsn", i, buf, timeout);
- return -1;
- }
- ptr++;
- }
- alarm(0);
- line = (char *)malloc(sizeof(char) * (len +1));
- if (line == NULL)
- { lprintf(LOG_ERROR, "malloc() failedn");
- exit(-1);
- }
- strncpy(line, buf, len);
- line[len] = ' ';
- lprintf(LOG_VERBOSE, "Written: +%s+n", line);
- free(line);
- return 0;
- }
- /* -------------------------------------------------------------------- */
- /* -------------------------------------------------------------------- */
- static int expwrite(int fd, char *buf)
- {
- if (caught_alarm)
- { return -1; /* Timeout */
- }
- rewrite:
- switch (write(fd, buf, 1))
- {
- case 1:
- lprintf(LOG_VERYVERBOSE, "Written: +%c+n", buf[0]);
- return 1; /* Sucessful Write */
- case -1:
- if (errno == EINTR)
- { if (caught_alarm)
- { return -1; /* Timeout */
- }
- else
- { /* Received an interrupt */
- /* that wasn't our timer */
- /* safely ignore it and */
- /* rewrite data */
- goto rewrite;
- }
- }
- else
- { lprintf(LOG_ERROR, "unknown write error %dn", errno);
- return -1; /* ERROR */
- }
- }
- return 0; /* Undefined */
- }