New login program.

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@4061 ec53bebd-3082-4978-b11e-865c3cabbd6b
1997-11-28 23:45:49 +00:00
parent 87835efd8c
commit 87167acf87
4 changed files with 504 additions and 0 deletions
--- a/appl/login/read_string.c
+++ b/appl/login/read_string.c
@@ -0,0 +1,125 @@
+/*
+ * Copyright (c) 1997 Kungliga Tekniska H<>gskolan
+ * (Royal Institute of Technology, Stockholm, Sweden). 
+ * All rights reserved. 
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions 
+ * are met: 
+ *
+ * 1. Redistributions of source code must retain the above copyright 
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright 
+ *    notice, this list of conditions and the following disclaimer in the 
+ *    documentation and/or other materials provided with the distribution. 
+ *
+ * 3. All advertising materials mentioning features or use of this software 
+ *    must display the following acknowledgement: 
+ *      This product includes software developed by Kungliga Tekniska 
+ *      H<>gskolan and its contributors. 
+ *
+ * 4. Neither the name of the Institute nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+ * SUCH DAMAGE. 
+ */
+
+#include "login_locl.h"
+
+RCSID("$Id$");
+
+static sig_atomic_t intr_flag;
+
+static void
+intr(int sig)
+{
+    intr_flag++;
+}
+
+int
+read_string(const char *prompt, char *buf, size_t len, int echo)
+{
+    struct sigaction sigs[47];
+    struct sigaction sa;
+    FILE *tty;
+    int ret = 0;
+    int of = 0;
+    int i;
+    int c;
+    char *p;
+
+    struct termios t_new, t_old;
+
+    memset(&sa, 0, sizeof(sa));
+    sa.sa_handler = intr;
+    sigemptyset(&sa.sa_mask);
+    sa.sa_flags = 0;
+    for(i = 0; i < sizeof(sigs) / sizeof(sigs[0]); i++)
+	sigaction(i, &sa, &sigs[i]);
+
+    if((tty = fopen("/dev/tty", "r")) == NULL)
+	tty = stdin;
+       
+    fprintf(stderr, "%s", prompt);
+    fflush(stderr);
+
+    if(echo == 0){
+	tcgetattr(fileno(tty), &t_old);
+	memcpy(&t_new, &t_old, sizeof(t_new));
+	t_new.c_lflag &= ~ECHO;
+	tcsetattr(fileno(tty), TCSANOW, &t_new);
+    }
+    intr_flag = 0;
+    p = buf;
+    while(intr_flag == 0){
+	c = getc(tty);
+	if(c == EOF){
+	    ret = 1;
+	    break;
+	}
+	if(c == '\n')
+	    break;
+	if(of == 0)
+	    *p++ = c;
+	of = (p == buf + len);
+    }
+    if(of)
+	p--;
+    *p = 0;
+    
+    if(echo == 0){
+	printf("\n");
+	tcsetattr(fileno(tty), TCSANOW, &t_old);
+    }
+    
+    if(tty != stdin)
+	fclose(tty);
+
+    for(i = 0; i < sizeof(sigs) / sizeof(sigs[0]); i++)
+	sigaction(i, &sigs[i], NULL);
+    
+    return of || intr_flag || ret;
+}
+
+
+#if 0
+int main()
+{
+    char s[128];
+    int ret;
+    ret = read_string("foo: ", s, sizeof(s), 0);
+    printf("%d ->%s<-\n", ret, s);
+}
+#endif