386BSD 0.1 development

Work on file usr/src/lib/libc/gen/getpass.c

Co-Authored-By: Lynne Greer Jolitz <ljolitz@cardio.ucsf.edu>
Synthesized-from: 386BSD-0.1

diff --git a/usr/src/lib/libc/gen/getpass.c b/usr/src/lib/libc/gen/getpass.c
new file mode 100644 (file)
index 0000000..3af4da9
--- /dev/null
+++ b/usr/src/lib/libc/gen/getpass.c
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 1988 The Regents of the University of California.
+ * 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 the University of
+ *     California, Berkeley and its contributors.
+ * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)getpass.c  5.9 (Berkeley) 5/6/91";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/termios.h>
+#include <sys/signal.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <pwd.h>
+
+char *
+getpass(prompt)
+       const char *prompt;
+{
+       struct termios term;
+       register int ch;
+       register char *p;
+       FILE *fp, *outfp;
+       long omask;
+       int echo;
+       static char buf[_PASSWORD_LEN + 1];
+
+       /*
+        * read and write to /dev/tty if possible; else read from
+        * stdin and write to stderr.
+        */
+       if ((outfp = fp = fopen("/dev/tty", "w+")) == NULL) {
+               outfp = stderr;
+               fp = stdin;
+       }
+       /*
+        * note - blocking signals isn't necessarily the
+        * right thing, but we leave it for now.
+        */
+       omask = sigblock(sigmask(SIGINT)|sigmask(SIGTSTP));
+       (void)tcgetattr(fileno(fp), &term);
+       if (echo = (term.c_lflag & ECHO)) {
+               term.c_lflag &= ~ECHO;
+               (void)tcsetattr(fileno(fp), TCSAFLUSH|TCSASOFT, &term);
+       }
+       (void)fputs(prompt, outfp);
+       rewind(outfp);                  /* implied flush */
+       for (p = buf; (ch = getc(fp)) != EOF && ch != '\n';)
+               if (p < buf + _PASSWORD_LEN)
+                       *p++ = ch;
+       *p = '\0';
+       (void)write(fileno(outfp), "\n", 1);
+       if (echo) {
+               term.c_lflag |= ECHO;
+               tcsetattr(fileno(fp), TCSAFLUSH|TCSASOFT, &term);
+       }
+       (void)sigsetmask(omask);
+       if (fp != stdin)
+               (void)fclose(fp);
+       return(buf);
+}