Add @filename syntax for the send string

diff --git a/chat/chat.8 b/chat/chat.8
index 2612d67ff775aa7218a19ee40123f3c2adcc5ee1..7d4ad5f937afbaa82cea9c8a180b60b006a61d48 100644 (file)
--- a/chat/chat.8
+++ b/chat/chat.8
@@ -1,6 +1,6 @@
 .\" -*- nroff -*-
 .\" manual page [] for chat 1.8
-.\" $Id: chat.8,v 1.7 1998/02/04 01:35:49 paulus Exp $
+.\" $Id: chat.8,v 1.8 1999/05/12 06:13:22 paulus Exp $
 .\" SH section heading
 .\" SS subsection heading
 .\" LP paragraph
@@ -153,6 +153,16 @@ character, you would have to write something like this:
 \'# ' logout
 .LP
 
+.SH SENDING DATA FROM A FILE
+If the string to send starts with an at sign (@), the rest of the
+string is taken to be the name of a file to read to get the string to
+send.  If the last character of the data read is a newline, it is
+removed.  The file can be a named pipe (or fifo) instead of a regular
+file.  This provides a way for \fBchat\fR to communicate with another
+program, for example, a program to prompt the user and receive a
+password typed in.
+.LP
+
 .SH ABORT STRINGS
 Many modems will report the status of the call as a string. These
 strings may be \fBCONNECTED\fR or \fBNO CARRIER\fR or \fBBUSY\fR. It

diff --git a/chat/chat.c b/chat/chat.c
index 5ce1336e381329afb811bb71e209efd840ade535..1f362a2e2aedd88b89d85778474abbdb019435a6 100644 (file)
--- a/chat/chat.c
+++ b/chat/chat.c
@@ -14,6 +14,9 @@
  *     This software is in the public domain.
  *
  * -----------------
+ *     12-May-99 added a feature to read data to be sent from a file,
+ *     if the send string starts with @.  Idea from gpk <gpk@onramp.net>.
+ *
  *     added -T and -U option and \T and \U substitution to pass a phone
  *     number into chat script. Two are needed for some ISDN TA applications.
  *     Keith Dart <kdart@cisco.com>
@@ -78,7 +81,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: chat.c,v 1.20 1999/03/31 12:28:16 paulus Exp $";
+static char rcsid[] = "$Id: chat.c,v 1.21 1999/05/12 06:13:22 paulus Exp $";
 #endif
 
 #include <stdio.h>
@@ -971,6 +974,8 @@ int c;
 void chat_send (s)
 register char *s;
 {
+    char file_data[STR_LEN];
+
     if (say_next) {
        say_next = 0;
        s = clean(s,0);
@@ -1109,6 +1114,43 @@ register char *s;
        return;
     }
 
+    /*
+     * The syntax @filename means read the string to send from the
+     * file `filename'.
+     */
+    if (s[0] == '@') {
+       /* skip the @ and any following white-space */
+       char *fn = s;
+       while (*++fn == ' ' || *fn == '\t')
+           ;
+
+       if (*fn != 0) {
+           FILE *f;
+           int n = 0;
+
+           /* open the file and read until STR_LEN-1 bytes or end-of-file */
+           f = fopen(fn, "r");
+           if (f == NULL)
+               fatal(1, "%s -- open failed: %m", fn);
+           while (n < STR_LEN - 1) {
+               int nr = fread(&file_data[n], 1, STR_LEN - 1 - n, f);
+               if (nr < 0)
+                   fatal(1, "%s -- read error", fn);
+               if (nr == 0)
+                   break;
+               n += nr;
+           }
+           fclose(f);
+
+           /* use the string we got as the string to send,
+              but trim off the final newline if any. */
+           if (n > 0 && file_data[n-1] == '\n')
+               --n;
+           file_data[n] = 0;
+           s = file_data;
+       }
+    }
+
     if (strcmp(s, "EOT") == 0)
        s = "^D\\c";
     else if (strcmp(s, "BREAK") == 0)