libbindle: adding bindle_getpass()

5 files changed, 176 insertions, 0 deletions

diff --git a/build-aux/makefile-libbindle.am b/build-aux/makefile-libbindle.am
index e4294d2..7db0d52 100644
--- a/build-aux/makefile-libbindle.am
+++ b/build-aux/makefile-libbindle.am
@@ -75,6 +75,8 @@ lib_libbindle_a_SOURCES			= $(srcdir)/$(bindletools_srcdir)/include/bindle.h \
                                           $(srcdir)/$(bindletools_srcdir)/lib/libbindle/lobj.h \
                                           $(srcdir)/$(bindletools_srcdir)/lib/libbindle/loptions.c \
                                           $(srcdir)/$(bindletools_srcdir)/lib/libbindle/loptions.h \
+                                          $(srcdir)/$(bindletools_srcdir)/lib/libbindle/lprompt.c \
+                                          $(srcdir)/$(bindletools_srcdir)/lib/libbindle/lprompt.h \
                                           $(srcdir)/$(bindletools_srcdir)/lib/libbindle/lstring.c \
                                           $(srcdir)/$(bindletools_srcdir)/lib/libbindle/lstring.h \
                                           $(srcdir)/$(bindletools_srcdir)/lib/libbindle/lstrings.c \
diff --git a/include/bindle.h b/include/bindle.h
index 347dec9..cb7adec 100644
--- a/include/bindle.h
+++ b/include/bindle.h
@@ -399,6 +399,16 @@ bindle_set_option(
          const void *                  invalue );
 
 
+//------------------------//
+// user prompt prototypes //
+//------------------------//
+#pragma mark user prompt prototypes
+
+char *
+bindle_getpass(
+         const char *                  prompt );
+
+
 //-------------------//
 // string prototypes //
 //-------------------//
diff --git a/lib/libbindle/lprompt.c b/lib/libbindle/lprompt.c
new file mode 100644
index 0000000..8eeaddd
--- /dev/null
+++ b/lib/libbindle/lprompt.c
@@ -0,0 +1,116 @@
+/*
+ *  Bindle Binaries Tools
+ *  Copyright (C) 2022 David M. Syzdek <david@syzdek.net>.
+ *  All rights reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions are
+ *  met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of David M. Syzdek 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 COPYRIGHT HOLDERS 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 DAVID M. SYZDEK 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.
+ */
+#define _LIB_LIBBINDLE_LPROMPT_C 1
+#include "lprompt.h"
+
+
+///////////////
+//           //
+//  Headers  //
+//           //
+///////////////
+#pragma mark - Headers
+
+#include <stdio.h>
+#include <signal.h>
+#include <assert.h>
+
+#ifdef HAVE_TERMIOS_H
+#include <termios.h>
+#endif
+#ifdef HAVE_SGTTY_H
+#include <sgtty.h>
+#endif
+
+
+/////////////////
+//             //
+//  Functions  //
+//             //
+/////////////////
+#pragma mark - Functions
+
+char *
+bindle_getpass(const char * prompt)
+{
+   static char    buff[512];
+   FILE         * fs;
+   int            c;
+   size_t         pos;
+#if defined(HAVE_TERMIOS_H) || defined(HAVE_SGTTY_H)
+   struct termios old;
+   struct termios new;
+   void          (*sig)( int sig );
+#endif
+
+   // prompts for password
+   prompt = ((prompt)) ? prompt : "Password: ";
+   if (prompt)
+      fprintf(stderr, "%s", prompt);
+   fflush(stdout);
+
+   // disables ECHO
+#if defined(HAVE_TERMIOS_H) || defined(HAVE_SGTTY_H)
+   if ((fs = fopen("/dev/tty", "r")) == NULL)
+      fs = stdin;
+   if(tcgetattr(fileno(fs), &old) == -1)
+      return(NULL);
+   sig          = signal(SIGINT, SIG_IGN);
+   new          = old;
+   new.c_lflag &= ~((unsigned)ECHO);
+   if(tcsetattr(fileno(fs), TCSANOW, &new))
+      return(NULL);
+#else
+   fs = stdin;
+#endif
+
+   // reads buffer
+   pos = 0;
+   while ( ((c = getc(fs)) != EOF) && (c != '\n') && (c != '\r') )
+      if (pos < (sizeof(buff)-1))
+         buff[pos++] = (char)c;
+   buff[pos] = '\0';
+
+   // restores previous terminal
+   fprintf(stderr, "\n");
+#if defined(HAVE_TERMIOS_H) || defined(HAVE_SGTTY_H)
+   fflush(stderr);
+   if(tcsetattr(fileno(fs), TCSANOW, &old))
+      return(NULL);
+   signal(SIGINT, sig);
+   fclose(fs);
+#endif
+
+   return(buff);
+}
+
+
+/* end of source */
diff --git a/lib/libbindle/lprompt.h b/lib/libbindle/lprompt.h
new file mode 100644
index 0000000..1d5785a
--- /dev/null
+++ b/lib/libbindle/lprompt.h
@@ -0,0 +1,45 @@
+/*
+ *  Bindle Binaries Tools
+ *  Copyright (C) 2022 David M. Syzdek <david@syzdek.net>.
+ *  All rights reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions are
+ *  met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of David M. Syzdek 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 COPYRIGHT HOLDERS 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 DAVID M. SYZDEK 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.
+ */
+#ifndef _LIB_LIBBINDLE_LPROMPT_H
+#define _LIB_LIBBINDLE_LPROMPT_H 1
+
+
+///////////////
+//           //
+//  Headers  //
+//           //
+///////////////
+#pragma mark - Headers
+
+#include "libbindle.h"
+
+
+#endif /* end of header */
diff --git a/m4/bindle-libbindle.m4 b/m4/bindle-libbindle.m4
index c3e3851..8728121 100644
--- a/m4/bindle-libbindle.m4
+++ b/m4/bindle-libbindle.m4
@@ -38,6 +38,9 @@ AC_DEFUN([AC_BINDLE_LIBBINDLE],[dnl
 
    LIBBINDLE_PREFIX="$1"
 
+   AC_CHECK_HEADERS([termios.h],     [], [])
+   AC_CHECK_HEADERS([sgtty.h],       [], [])
+
    AC_SUBST([LIBBINDLE_PREFIX],                 [${LIBBINDLE_PREFIX}])
    AC_DEFINE_UNQUOTED([LIBBINDLE_PREFIX],       ["$LIBBINDLE_PREFIX"],  [libbindle.la function prefix])
    AM_CONDITIONAL([WITH_BINDLE_PREFIX_H],       [test "x${LIBBINDLE_PREFIX}" != "x"])