initial commit

diff --git a/LICENSE b/LICENSE
new file mode 100644 (file)
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--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT/X Consortium License
+
+(C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the 
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in 
+all copies or substantial portions of the Software. 
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL 
+THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+DEALINGS IN THE SOFTWARE.

diff --git a/Makefile b/Makefile
new file mode 100644 (file)
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+++ b/Makefile
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+# slock - simple screen locker
+#   (C)opyright MMVI Anselm R. Garbe
+
+include config.mk
+
+SRC = slock.c
+OBJ = ${SRC:.c=.o}
+
+all: options slock
+
+options:
+       @echo slock build options:
+       @echo "CFLAGS   = ${CFLAGS}"
+       @echo "LDFLAGS  = ${LDFLAGS}"
+       @echo "CC       = ${CC}"
+       @echo "LD       = ${LD}"
+
+.c.o:
+       @echo CC $<
+       @${CC} -c ${CFLAGS} $<
+
+${OBJ}: config.mk
+
+slock: ${OBJ}
+       @echo LD $@
+       @${LD} -o $@ ${OBJ} ${LDFLAGS}
+       @strip $@
+
+clean:
+       @echo cleaning
+       @rm -f slock ${OBJ} slock-${VERSION}.tar.gz
+
+dist: clean
+       @echo creating dist tarball
+       @mkdir -p slock-${VERSION}
+       @cp -R LICENSE Makefile README config.mk ${SRC} slock-${VERSION}
+       @tar -cf slock-${VERSION}.tar slock-${VERSION}
+       @gzip slock-${VERSION}.tar
+       @rm -rf slock-${VERSION}
+
+install: all
+       @echo installing executable file to ${DESTDIR}${PREFIX}/bin
+       @mkdir -p ${DESTDIR}${PREFIX}/bin
+       @cp -f slock ${DESTDIR}${PREFIX}/bin
+       @chmod 755 ${DESTDIR}${PREFIX}/bin/slock
+       @chmod u+s ${DESTDIR}${PREFIX}/bin/slock
+
+uninstall:
+       @echo removing executable file from ${DESTDIR}${PREFIX}/bin
+       @rm -f ${DESTDIR}${PREFIX}/bin/slock
+
+.PHONY: all options clean dist install uninstall

diff --git a/README b/README
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+++ b/README
@@ -0,0 +1,24 @@
+slock - simple screen locker
+============================
+simple screen locker utility for X. 
+
+
+Requirements
+------------
+In order to build slock you need the Xlib header files.
+
+
+Installation
+------------
+Edit config.mk to match your local setup (slock is installed into
+the /usr/local namespace by default).
+
+Afterwards enter the following command to build and install slock (if
+necessary as root):
+
+    make clean install
+
+
+Running slock
+-------------
+Simply invoke the 'slock' command.

diff --git a/config.mk b/config.mk
new file mode 100644 (file)
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--- /dev/null
+++ b/config.mk
@@ -0,0 +1,25 @@
+# slock version
+VERSION = 0.1
+
+# Customize below to fit your system
+
+# paths
+PREFIX = /usr/local
+MANPREFIX = ${PREFIX}/share/man
+
+X11INC = /usr/X11R6/include
+X11LIB = /usr/X11R6/lib
+
+# includes and libs
+INCS = -I. -I/usr/include -I${X11INC}
+LIBS = -L/usr/lib -lc -lcrypt -L${X11LIB} -lX11
+
+# flags
+CFLAGS = -Os ${INCS} -DVERSION=\"${VERSION}\"
+LDFLAGS = ${LIBS}
+#CFLAGS = -g -Wall -O2 ${INCS} -DVERSION=\"${VERSION}\"
+#LDFLAGS = -g ${LIBS}
+
+# compiler and linker
+CC = cc
+LD = ${CC}

diff --git a/slock.c b/slock.c
new file mode 100644 (file)
index 0000000..824baa2
--- /dev/null
+++ b/slock.c
@@ -0,0 +1,92 @@
+/* (C)opyright MMIV-MMV Anselm R. Garbe <garbeam at gmail dot com>
+ * See LICENSE file for license details.
+ */
+#define _XOPEN_SOURCE
+#include <shadow.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <X11/keysym.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+int
+main(int argc, char **argv) {
+       char buf[32], passwd[256];
+       int num, prev_nitem;
+       struct spwd *sp;
+       unsigned int i, len;
+       Bool running = True;
+       KeySym ksym;
+       Display *dpy;
+       XEvent ev;
+
+       if((argc > 1) && !strncmp(argv[1], "-v", 3)) {
+               fputs("slock-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
+               exit(EXIT_SUCCESS);
+       }
+       if(!(sp = getspnam(getenv("USER")))) {
+               fputs("slock: cannot retrieve password entry (make sure to suid slock)\n", stderr);
+               exit(EXIT_FAILURE);
+       }
+       endspent();
+       if(!(dpy = XOpenDisplay(0))) {
+               fputs("slock: cannot open display\n", stderr);
+               exit(EXIT_FAILURE);
+       }
+
+       /* init */
+       passwd[0] = 0;
+       while(XGrabKeyboard(dpy, DefaultRootWindow(dpy), True, GrabModeAsync,
+                        GrabModeAsync, CurrentTime) != GrabSuccess)
+               usleep(1000);
+
+       /* main event loop */
+       while(running && !XNextEvent(dpy, &ev))
+               if(ev.type == KeyPress) {
+                       len = strlen(passwd);
+                       buf[0] = 0;
+                       num = XLookupString(&ev.xkey, buf, sizeof(buf), &ksym, 0);
+                       if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
+                                       || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
+                                       || IsPrivateKeypadKey(ksym))
+                               continue;
+                       /* first check if a control mask is omitted */
+                       if(ev.xkey.state & ControlMask) {
+                               switch (ksym) {
+                               case XK_h:
+                               case XK_H: ksym = XK_BackSpace;
+                                       break;
+                               case XK_u:
+                               case XK_U: passwd[0] = 0;
+                                       continue;
+                               }
+                       }
+                       switch(ksym) {
+                       case XK_Return:
+                               running = strncmp(crypt(passwd, sp->sp_pwdp), sp->sp_pwdp, sizeof(passwd));
+                               passwd[0] = 0;
+                               break;
+                       case XK_Escape:
+                               passwd[0] = 0;
+                               break;
+                       case XK_BackSpace:
+                               if(len)
+                                       passwd[--len] = 0;
+                               break;
+                       default:
+                               if(num && !iscntrl((int) buf[0])) {
+                                       buf[num] = 0;
+                                       if(len)
+                                               strncat(passwd, buf, sizeof(passwd));
+                                       else
+                                               strncpy(passwd, buf, sizeof(passwd));
+                               }
+                               break;
+                       }
+               }
+       XCloseDisplay(dpy);
+       return 0;
+}