Update ChangeLog and bump version for v1.9.2 release

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

.gitignore

@@ -22,3 +22,4 @@ aclocal.m4
 ar-lib
 autom4te.cache
 libite*
+test-driver

ChangeLog.md

@@ -3,6 +3,63 @@ Change Log
 
 All notable changes to the project are documented in this file.
 
+
+[v1.9.2][] - 2017-07-09
+-----------------------
+
+### Changes
+- Add `initscr()` function to query screen size
+- Convert `printheader()` to a static inline function
+
+
+[v1.9.1][] - 2017-07-03
+-----------------------
+
+### Changes
+- Add missing `whichp()` predicate function to accompany `which()`
+- Allow `which("ps aux")`, which skips any arguments to command
+
+
+[v1.9.0][] - 2017-07-02
+-----------------------
+
+### Changes
+- Add `which()`, a C implementation of UNIX which(1)
+- Add `printheader()`, prints a top-like table heading for client tools
+- Remove `UNUSED()` macro, recommended to disable GCC warning instead
+
+### Fixes
+- Fix issue #6: `touch()` does not update mtime if file exists
+- Fix non-writable `tempfile()`, now with proper unit test
+
+
+[v1.8.3][] - 2017-01-08
+-----------------------
+
+### Changes
+- Support absolute path in `pidfile()`.  Needed by, e.g. Inadyn
+- Add initial `debian/` packaging
+- Update README with note on remembering to set `umask()`
+
+### Fixes
+- In use-cases when `pidfile()` is called consecutively, e.g. on
+  `SIGHUP`, recreate PID file if it no longer exists
+
+
+[v1.8.2][] - 2016-09-05
+-----------------------
+
+### Changes
+- Updated build instructions in README.
+- Converted `touch()`, `makedir()`, `makefifo()`, and `erase()` from
+  macros to inline functions.  Also removed implicit logging to stderr
+  on error.
+
+### Fixes
+- Fix small memory leak in `pidfile()` ... at exit.
+- Fixes for building on musl libc
+
+
 [v1.8.1][] - 2016-06-25
 -----------------------
 
@@ -203,7 +260,11 @@ problems this may cause!
 Initial extraction of frog DNA from [Finit][].  See [README][] for API details.
 
 
-[UNRELEASED]: https://github.com/troglobit/libite/compare/v1.8.1...HEAD
+[UNRELEASED]: https://github.com/troglobit/libite/compare/v1.9.1...HEAD
+[v1.9.1]: https://github.com/troglobit/libite/compare/v1.9.0...v1.9.1
+[v1.9.0]: https://github.com/troglobit/libite/compare/v1.8.3...v1.9.0
+[v1.8.3]: https://github.com/troglobit/libite/compare/v1.8.2...v1.8.3
+[v1.8.2]: https://github.com/troglobit/libite/compare/v1.8.1...v1.8.2
 [v1.8.1]: https://github.com/troglobit/libite/compare/v1.8.0...v1.8.1
 [v1.8.0]: https://github.com/troglobit/libite/compare/v1.7.0...v1.8.0
 [v1.7.0]: https://github.com/troglobit/libite/compare/v1.6.0...v1.7.0

HACKING.md

@@ -4,9 +4,10 @@ Maintenance and Release Checklist
 Maintenance
 -----------
 
+* Encourage contributors to write tests, in particular for new features
+* Run tests regularly, use Travis-CI to do this automatically
 * Leverage GitHub issues for milestone planning
 * Reference issues from GitHub pull requests to alert issue subscribers
-* Encourage contributors to write unit tests
 * Bump library ABI version just before release!
 
 
@@ -17,6 +18,7 @@ Release Checklist
   - Inform users in a plain language of changes and bug fixes
   - Do *not* copy-paste GIT commit logs!
   - Order entrys according to importance, most relevant first
+* Run unit tests: `make check`
 * Do we need to bump the ABI version? (Probably, see below)
 * Tag
 * Push last commit(s) *and* tags to GitHub
@@ -25,7 +27,7 @@ Release Checklist
         make distclean
         ./autogen.sh
         ./configure
-		make release
+        make release
 
 * Create new release in GitHub releases page
 * Copy and paste ChangeLog entry, check any stale links!
@@ -54,14 +56,31 @@ It must be updated according to the [GNU Libtool recommendations][1]:
    release of your software.  More frequent updates are unnecessary, and
    only guarantee that the current interface number gets larger faster.
 3. If the library *source code has changed at all* since the last update,
-   then increment revision (`c:r:a` --> `c:r+1:a`)
-4. If any *interfaces have been added, removed, or changed* since last
-   update, increment current, and zero revision (`c:r:a` --> `c+1:0:0`)
+   then increment revision (`c:r:a` becomes `c:r+1:a`).
+4. If any *interfaces have been added, removed, or changed* since the
+   last update, increment current, and set revision to 0.
 5. If any *interfaces have been added* since the last public release,
    then increment age.
 6. If any *interfaces have been removed or changed* since the last
    public release, then set age to 0.
 
+The libtool ABI versioning logic is very confusing but works if you just
+disable your brain and follow the rules, one by one.
+
+**Example #1:** a new function has been added, none of the existing ones
+have changed.  The initial version is 1:0:0, we follow the rules above to
+the letter: increase revision, increase current and set revision to zero,
+and finally increase age.  This, rather confusingly, gives us 2:0:1 which
+libtool then translates to `libconfuse.so.1.1.0`.
+
+**Example #2:** some existing functions are changed, they now return an
+`int` instead of `void`.  The initial version is 0:0:0, and we follow the
+rules again: increment revision, increment current and set revision to
+zero, set age to zero.  This gives us 1:0:0, which is then translated to
+ `libconfuse.so.1.0.0`.
+
+### Note
+
 Usually, non-developers have no interest in running development versions
 (releases are frequent enough), and developers are expected to know how
 to juggle versions.  In such an ideal world, it is good enough to bump

Makefile.am

@@ -3,14 +3,14 @@ ACLOCAL_AMFLAGS     = -I m4
 lib_LTLIBRARIES     = libite.la
 pkgincludedir       = $(includedir)/lite
 pkginclude_HEADERS  = lite.h queue.h conio.h tree.h strlite.h strdupa.h strndupa.h strnlen.h
-libite_la_SOURCES   = chomp.c copyfile.c dir.c fexist.c fisdir.c fmode.c fparseln.c	\
-		      fsendfile.c ifconfig.c lfile.c makepath.c pidfile.c pidfilefn.c	\
-		      progress.c reallocarray.c rsync.c strlcpy.c strlcat.c strtonum.c	\
-		      tempfile.c tree.c
+libite_la_SOURCES   = chomp.c copyfile.c dir.c fexist.c fisdir.c fmode.c fparseln.c		\
+		      fsendfile.c ifconfig.c lfile.c makepath.c pidfile.c pidfilefn.c		\
+		      progress.c reallocarray.c rsync.c strlcpy.c strlcat.c strtonum.c		\
+		      tempfile.c tree.c which.c
 
 libite_la_CPPFLAGS  = -D_GNU_SOURCE
 libite_la_CFLAGS    = -W -Wall -Wextra
-libite_la_LDFLAGS   = $(AM_LDFLAGS) -version-info 3:0:0
+libite_la_LDFLAGS   = $(AM_LDFLAGS) -version-info 4:0:0
 
 pkgconfigdir        = $(libdir)/pkgconfig
 pkgconfig_DATA      = libite.pc
@@ -18,35 +18,39 @@ doc_DATA            = README.md LICENSE
 EXTRA_DIST          = README.md LICENSE ChangeLog.md
 SUBDIRS             = tests
 
+## Generate .deb package
+package:
+	@dpkg-buildpackage -uc -us -B
+
 ## Generate MD5 checksum file
 MD5 = md5sum
 md5-dist:
-	@for file in $(DIST_ARCHIVES); do	\
-		$(MD5) $$file > $$file.md5;	\
+	@for file in $(DIST_ARCHIVES); do							\
+		$(MD5) $$file > $$file.md5;							\
 	done
 
 ## Check if tagged in git
 release-hook:
-	if [ ! `git tag | grep $(PACKAGE_VERSION)` ]; then				\
-		echo;									\
-		printf "\e[1m\e[41mCannot find release tag $(PACKAGE_VERSION)\e[0m\n";	\
-		printf "\e[1m\e[5mDo release anyway?\e[0m "; read yorn;			\
-		if [ "$$yorn" != "y" -a "$$yorn" != "Y" ]; then				\
-			printf "OK, aborting release.\n";				\
-			exit 1;								\
-		fi;									\
-		echo;									\
-	else										\
-		echo;									\
-		printf "\e[1m\e[42mFound GIT release tag $(PACKAGE_VERSION)\e[0m\n";	\
-		printf "\e[1m\e[44m>>Remember to push tags!\e[0m\n";			\
-		echo;									\
+	if [ ! `git tag | grep $(PACKAGE_VERSION)` ]; then					\
+		echo;										\
+		printf "\033[1m\033[41mCannot find release tag $(PACKAGE_VERSION)\033[0m\n";	\
+		printf "\033[1m\033[5mDo release anyway?\033[0m "; read yorn;			\
+		if [ "$$yorn" != "y" -a "$$yorn" != "Y" ]; then					\
+			printf "OK, aborting release.\n";					\
+			exit 1;									\
+		fi;										\
+		echo;										\
+	else											\
+		echo;										\
+		printf "\033[1m\033[42mFound GIT release tag $(PACKAGE_VERSION)\033[0m\n";	\
+		printf "\033[1m\033[44m>>Remember to push tags!\033[0m\n";			\
+		echo;										\
 	fi
 
 ## Target to run when building a release
 release: dist release-hook md5-dist
-	@for file in $(DIST_ARCHIVES); do						\
-		printf "$$file    \tDistribution tarball\n";				\
-		printf "$$file.md5\t"; cat $$file.md5 | cut -f1 -d' ';			\
-		mv $$file* ../;								\
+	@for file in $(DIST_ARCHIVES); do							\
+		printf "$$file    \tDistribution tarball\n";					\
+		printf "$$file.md5\t"; cat $$file.md5 | cut -f1 -d' ';				\
+		mv $$file* ../;									\
 	done

README.md

@@ -70,6 +70,14 @@ and in your `Makefile.am`:
     proggy_LDADD  = $(lite_LIBS)
 
 
+Important Note
+--------------
+
+When using functions like `mkpath()`, `makepath()`, and `makefifo()`,
+make sure your `umask()` is correct so you do not accidentally create
+files and directories accessible to other users than intended.
+
+
 Helper Macros
 -------------
 
@@ -135,10 +143,6 @@ Helper Macros
   Returns the number of elements in an array.  From the great book, The
   Practice of Programming, by Kernighan and Pike.
 
-- `UNUSED(var)`
-
-  Shorter and more readable version of `var __attribute__ ((unused))`
-
 
 Generic Functions
 -----------------
@@ -223,11 +227,13 @@ Generic Functions
   with the `dst` name.  On successful operation the source is removed
   and the function returns POSIX OK (0).
 
-- `pidfile(basename)`
+- `pidfile(name)`
 
-  Create a daemon PID file in `_PATH_VARRUN` using either `basename` or,
-  if `basename` is `NULL`, `__progname`.  The resulting file name is
-  available to the user as a read-only pointer:
+  Create a daemon PID file using either the `name` as a full path, if
+  `name` starts with `/`, or in `_PATH_VARRUN` using `name` as the
+  basename of the application.  If `name` is `NULL`, then `__progname`
+  is used as the basename.  The resulting file name is available to the
+  user as a read-only pointer:
 
         extern char *__pidfile_name;
 
@@ -238,14 +244,14 @@ Generic Functions
 
   The PID file is removed when the program exits, using an `atexit()`
   handler.  However, depending on how the program terminates the file
-  may still exist even though the program is no longer running.  This
-  is only a problem for clients.
+  may still exist even though the program is no longer running.
 
   Calling this function multiple times updates the mtime of the file.
   Only one `atexit()` handler is created, regardless of the amount of
-  times the function is called.
+  times the function is called.  If the file is removed, subsequent
+  calls to this function will recreate the file.
   
-  See below for link to OpenBSD man page.
+  See below for a link to OpenBSD man page.
 
 - `pidfile_read(pidfile)`
 
@@ -282,6 +288,16 @@ Generic Functions
   optional listing of file and directory permissions if `show_perms` is
   set.  The `path` argument should be a directory.
 
+- `which(cmd)`, `whichp(cmd)`
+
+  C implementation of UNIX which(1).  Returns a malloc'ed string with the
+  full path to `cmd` on success, otherwise `NULL`.
+  
+  `whichp()` is a predicate function, returns `TRUE` or `FALSE`.
+
+  **Note:** `which("/bin/ps aux")` will return `/bin/ps`, or `TRUE`,
+  provided of course `/bin/ps` exists.
+
 
 GNU Functions
 -------------
@@ -316,9 +332,9 @@ The following are popular functions and highly useful macros from the
 
   http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man3/pidfile.3
 
-  **Note:** this version of `pidfile()` has been extended to handle it
-  being called multiple times, i.e. to not create multiple `atexit()`
-  handlers, and also to export a few internal paths:
+  **Note:** the version of `pidfile()` in -lite has been extended to
+  handle it being called multiple times, i.e. to not create multiple
+  `atexit()` handlers, and also to export a few internal paths:
 
 	- `__pidfile_path`: prefix path, default `_PATH_VARRUN`.  Notice the
 	  trailing slash requirement if you want to override it!
@@ -362,7 +378,8 @@ system:
 
     ./configure
     make -j5
-    make install-strip
+    sudo make install-strip
+    sudo ldconfig
 
 **Note:** When checking code from GitHub, use <kbd>./autogen.sh</kbd> to
 generate a `configure` script.  It is a generated file and otherwise only

configure.ac

@@ -1,4 +1,4 @@
-AC_INIT(libite, 1.8.1, https://github.com/troglobit/libite/issues)
+AC_INIT(libite, 1.9.2, https://github.com/troglobit/libite/issues)
 AM_INIT_AUTOMAKE([1.11 foreign no-dist-gzip dist-xz])
 AM_SILENT_RULES([yes])
 

conio.h

@@ -1,6 +1,6 @@
 /* A conio.h like implementation for VTANSI displays.
  *
- * Copyright (c) 2009-2013  Joachim Nilsson <troglobit@gmail.com>
+ * Copyright (c) 2009-2017  Joachim Nilsson <troglobit@gmail.com>
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -48,29 +48,90 @@
 #define LIGHTCYAN    0x16
 #define WHITE        0x17
 
-/* Esc[2JEsc[1;1H             - Clear screen and move cursor to 1,1 (upper left) pos. */
-#define clrscr()              fputs ("\e[2J\e[1;1H", stdout)
-/* Esc[K                      - Erases from the current cursor position to the end of the current line. */
-#define clreol()              fputs ("\e[K", stdout)
-/* Esc[2K                     - Erases the entire current line. */
-#define delline()             fputs ("\e[2K", stdout)
-/* Esc[Line;ColumnH           - Moves the cursor to the specified position (coordinates) */
-#define gotoxy(x,y)           printf("\e[%d;%dH", y, x)
-/* Esc[?25l (lower case L)    - Hide Cursor */
-#define hidecursor()          fputs ("\e[?25l", stdout)
-/* Esc[?25h (lower case H)    - Show Cursor */
-#define showcursor()          fputs ("\e[?25h", stdout)
+#ifndef SCREEN_WIDTH
+#define SCREEN_WIDTH 80		/* Override using, e.g. #define SCREEN_WIDTH tty_width() */
+#endif
 
-/* Esc[Value;...;Valuem       - Set Graphics Mode */
-#define __set_gm(attr,color,val)					\
-	if (!color)							\
-		printf("\e[%dm", attr);					\
+/* Esc[2JEsc[1;1H             - Clear screen and move cursor to 1,1 (upper left) pos. */
+#define clrscr()              fputs ("\033[2J\033[1;1H", stdout)
+/* Esc[K                      - Erases from the current cursor position to the end of the current line. */
+#define clreol()              fputs ("\033[K", stdout)
+/* Esc[2K                     - Erases the entire current line. */
+#define delline()             fputs ("\033[2K", stdout)
+/* Esc[Line;ColumnH           - Moves the cursor to the specified position (coordinates) */
+#define gotoxy(x,y)           fprintf(stdout, "\033[%d;%dH", y, x)
+/* Esc[?25l (lower case L)    - Hide Cursor */
+#define hidecursor()          fputs ("\033[?25l", stdout)
+/* Esc[?25h (lower case H)    - Show Cursor */
+#define showcursor()          fputs ("\033[?25h", stdout)
+
+/* Esc[Value;...;Valuem       - Set Graphics Mode (attr, color, val) */
+#define __set_gm(a,c,v)							\
+	if (!c)								\
+		fprintf(stdout, "\033[%dm", a);				\
 	else								\
-		printf("\e[%d;%dm", color & 0x10 ? 1 : 0, (color & 0xF) + val)
+		fprintf(stdout, "\033[%d;%dm", c & 0x10 ? 1 : 0, (c & 0xF) + v)
 #define textattr(attr)        __set_gm(attr, 0, 0)
 #define textcolor(color)      __set_gm(RESETATTR, color, 30)
 #define textbackground(color) __set_gm(RESETATTR, color, 40)
 
+/* Print table heading @line to @fp, with optional leading newline */
+static inline void printheader(FILE *fp, const char *line, int nl)
+{
+	fprintf(fp ?: stdout,
+		"%s\033[7m%s%*s\033[0m\n",
+		nl ? "\n" : "",
+		line, SCREEN_WIDTH - (int)strlen(line), "");
+}
+
+/* Requries: #inlude <termios.h> and #include <poll.h> */
+static inline void initscr(int *row, int *col)
+{
+	if (!row || !col)
+		return;
+
+#if defined(TCSANOW) && defined(POLLIN)
+	struct termios tc, saved;
+	struct pollfd fd = { STDIN_FILENO, POLLIN, 0 };
+
+	/* Disable echo to terminal while probing */
+	tcgetattr(STDERR_FILENO, &tc);
+	saved = tc;
+	tc.c_cflag |= (CLOCAL | CREAD);
+	tc.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
+	tcsetattr(STDERR_FILENO, TCSANOW, &tc);
+
+	/*
+	 * Save cursor pos+attr
+	 * Diable top+bottom margins
+	 * Set cursor at the far bottom,right pos
+	 * Query term for resulting pos
+	 */
+	fprintf(stderr, "\e7" "\e[r" "\e[999;999H" "\e[6n");
+
+	/*
+	 * Wait here for terminal to echo back \e[row,lineR ...
+	 */
+	if (poll(&fd, 1, 300) <= 0 || scanf("\e[%d;%dR", row, col) != 2) {
+		*row = 24;
+		*col = 80;
+	}
+
+	/*
+	 * Restore above saved cursor pos+attr
+	 */
+	fprintf(stderr, "\e8");
+
+	/* Restore terminal */
+	tcsetattr(STDERR_FILENO, TCSANOW, &saved);
+
+	return;
+#else
+	*row = 24;
+	*col = 80;
+#endif
+}
+
 #endif /* CONIO_H_ */
 
 /**

debian/.gitignore

@@ -0,0 +1,8 @@
+tmp/*
+libuev/*
+libuev*
+autoreconf*
+debhelper*
+files
+!*.dirs
+!*.install

debian/changelog

@@ -0,0 +1,23 @@
+libite (1.9.1-1) unstable; urgency=low
+
+  * New upstream reelase, v1.9.1.
+
+ -- Joachim Nilsson <troglobit@gmail.com>  Sun, 02 Jul 2017 19:23:00 +0100
+
+libite (1.9.0-1) unstable; urgency=low
+
+  * New upstream reelase.
+
+ -- Joachim Nilsson <troglobit@gmail.com>  Sun, 02 Jul 2017 19:23:00 +0100
+
+libite (1.8.3-1) unstable; urgency=low
+
+  * New upstream reelase.
+
+ -- Joachim Nilsson <troglobit@gmail.com>  Sun, 08 Jan 2017 15:22:26 +0100
+
+libite (1.8.2-1) unstable; urgency=low
+
+  * Initial release.
+
+ -- Joachim Nilsson <troglobit@gmail.com>  Tue, 29 Nov 2016 08:23:35 +0100

debian/clean

@@ -0,0 +1 @@
+config.log

debian/compat

@@ -0,0 +1 @@
+9

debian/control

@@ -0,0 +1,51 @@
+Source: libite
+Priority: optional
+Maintainer: Joachim Nilsson <troglobit@gmail.com>
+Build-Depends: dpkg-dev (>= 1.14.9), debhelper (>= 9), dh-autoreconf
+Standards-Version: 3.9.6
+Section: libs
+Homepage: https://github.com/troglobit/libite/
+Vcs-Git: https://github.com/troglobit/libite.git
+Vcs-Browser: https://github.com/troglobit/libite/
+
+Package: libite-dev
+Priority: extra
+Section: libdevel
+Architecture: any
+Depends: ${misc:Depends}, libite (= ${binary:Version})
+Description: static library, header files, and docs for libite
+ Static library, header files, and documentation for libite.
+ .
+ Libite is a lightweight library of frog DNA. It can be used to fill the
+ gaps in any dinosaur project. It holds useful functions and macros
+ developed by both Finit and the OpenBSD project. Most notably the
+ string functions: strlcpy(3), strlcat(3) and the highly useful *BSD
+ sys/queue.h and sys/tree.h API's.
+ .
+ Libite is the frog DNA missing in GNU libc. However, -lite does not aim
+ to become another GLIB! One noticeable gap in GLIBC is the missing
+ _SAFE macros in the BSD sys/queue.h API — highly recommended when
+ traversing lists to delete/free nodes.
+ .
+ The code is open sourced under a mix of the MIT/X11 license, the ISC
+ license used by OpenBSD, and BSD licenses, all of them are extremely
+ liberal and can be used freely in proprietary software if needed.
+
+Package: libite
+Architecture: any
+Depends: ${misc:Depends}, ${shlibs:Depends}
+Description: That missing frog DNA you've been looking for. MIT/X11/ISC/BSD License.
+ Libite is a lightweight library of frog DNA. It can be used to fill the
+ gaps in any dinosaur project. It holds useful functions and macros
+ developed by both Finit and the OpenBSD project. Most notably the
+ string functions: strlcpy(3), strlcat(3) and the highly useful *BSD
+ sys/queue.h and sys/tree.h API's.
+ .
+ Libite is the frog DNA missing in GNU libc. However, -lite does not aim
+ to become another GLIB! One noticeable gap in GLIBC is the missing
+ _SAFE macros in the BSD sys/queue.h API — highly recommended when
+ traversing lists to delete/free nodes.
+ .
+ The code is open sourced under a mix of the MIT/X11 license, the ISC
+ license used by OpenBSD, and BSD licenses, all of them are extremely
+ liberal and can be used freely in proprietary software if needed.

debian/copyright

@@ -0,0 +1,84 @@
+Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Source: https.//github.com/troglobit/libite/
+
+Files: *
+Copyright:
+2008-2010 Claudio Matsuoka <cmatsuoka@gmail.com>
+2008-2016 Joachim Nilsson <troglobit@gmail.com>
+License: MIT
+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.
+
+Files: chomp.c
+Copyright: 2014-2015 Joachim Nilsson <troglobit@gmail.com>
+License: ISC
+
+Files: conio.h
+Copyright: 2009-2013 Joachim Nilsson <troglobit@gmail.com>
+License: ISC
+
+Files: dir.c
+Copyright: 2008-2016 Joachim Nilsson <troglobit@gmail.com>
+License: ISC
+
+Files: lfile.c
+Copyright: 2015-2016 Joachim Nilsson <troglobit@gmail.com>
+License: ISC
+
+Files: pidfile.c
+Copyright: 1999 The NetBSD Foundation, Inc.
+License: BSD-2-clause
+
+Files: queue.h
+Copyright: 1991, 1993 The Regents of the University of California.
+License: BSD-3-clause
+
+Files: reallocarray.c
+Copyright: 2008 Otto Moerbeek <otto@drijf.net>
+License: ISC
+
+Files: rsync.c
+Copyright: 2011, 2012 Joachim Nilsson <troglobit@gmail.com>
+License: ISC
+
+Files: strdupa.h strndupa.h
+Copyright: 2009 William Ahern
+License: MIT
+
+Files: strlcat.c strlcpy.c
+Copyright: 998, 2015 Todd C. Miller <Todd.Miller@courtesan.com>
+License: MIT
+
+Files: strnlen.c
+Copyright: 2016 Joachim Nilsson <troglobit@gmail.com>
+License: ISC
+
+Files: strtonum.c
+Copyright: 2004 Ted Unangst and Todd Miller
+License: ISC
+
+Files: tempfile.c
+Copyright: 2015-2016 Joachim Nilsson <troglobit@gmail.com>
+License: ISC
+
+Files: tree.c
+Copyright: 2015 Joachim Nilsson <troglobit@gmail.com>
+License: ISC
+
+Files: tests/*.c
+License: public-domain

debian/docs

@@ -0,0 +1 @@
+README.md

debian/libite-dev.dirs

@@ -0,0 +1,2 @@
+usr/lib
+usr/include

debian/libite-dev.install

@@ -0,0 +1,4 @@
+usr/include/lite/*.h
+usr/lib/*/lib*.a
+usr/lib/*/lib*.so
+usr/lib/*/pkgconfig/lib*.pc

debian/libite.dirs

@@ -0,0 +1 @@
+usr/lib

debian/libite.install

@@ -0,0 +1 @@
+usr/lib/*/lib*.so.*

debian/rules

@@ -0,0 +1,8 @@
+#!/usr/bin/make -f           
+
+# Uncomment this to turn on verbose mode.
+#export DH_VERBOSE=1
+
+%:
+	dh $@ --with autoreconf
+

debian/source/format

@@ -0,0 +1 @@
+3.0 (native)

fparseln.c

@@ -24,11 +24,6 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include <sys/cdefs.h>
-#if defined(LIBC_SCCS) && !defined(lint)
-__RCSID("$NetBSD: fparseln.c,v 1.10 2009/10/21 01:07:45 snj Exp $");
-#endif /* LIBC_SCCS and not lint */
-
 #include <assert.h>
 #include <errno.h>
 #include <stdio.h>

lite.h

@@ -25,7 +25,7 @@
 #ifndef LITE_H_
 #define LITE_H_
 
-#include <err.h>
+#include <errno.h>
 #include <stdio.h>
 #include <stdint.h>    /* uint8_t, uint16_t, uint32_t, INT32_MAX, etc. */
 #include <sys/stat.h>
@@ -71,7 +71,7 @@ int     mkpath     (char *dir, mode_t mode);
 int     makepath   (char *dir);
 
 int     dir        (const char *dir, const char *type, int (*filter) (const char *file), char ***list, int strip);
-int     rsync      (char *src, char *dst, int delete, int (*filter) (const char *file));
+int     rsync      (char *src, char *dst, int delete,  int (*filter) (const char *file));
 
 int     pidfile       (const char *basename);
 int     pidfile_signal(const char *pidfile, int signal);
@@ -85,18 +85,47 @@ int     tree(char *path, int show_perms);
 void    progress       (int percent, int max_width);
 void    progress_simple(int percent);
 
+char   *which      (const char *cmd);
+int     whichp     (const char *cmd);
+
 #ifndef touch
-# define touch(x) do { if (mknod((x), S_IFREG|0644, 0) && errno != EEXIST) warn("Failed creating %s", x); } while (0)
+#include <sys/stat.h>		/* utimensat() */
+#include <sys/time.h>		/* utimensat() on *BSD */
+static inline int touch(const char *path)
+{
+	if (mknod((path), S_IFREG|0644, 0)) {
+		if (errno == EEXIST)
+			return utimensat(0, path, NULL, 0);
+		return -1;
+	}
+	return 0;
+}
 #endif
 #ifndef makedir
-# define makedir(x, p) do { if (mkdir(x, p) && errno != EEXIST) warn("Failed creating directory %s", x); } while (0)
+static inline int makedir(const char *path, mode_t mode)
+{
+	if (mkdir(path, mode) && errno != EEXIST)
+		return -1;
+	return 0;
+}
 #endif
 #ifndef makefifo
-# define makefifo(x, p) do { if (mkfifo(x, p) && errno != EEXIST) warn("Failed creating FIFO %s", x); } while (0)
+static inline int makefifo(const char *path, mode_t mode)
+{
+	if (mkfifo(path, mode) && errno != EEXIST)
+		return -1;
+	return 0;
+}
 #endif
 #ifndef erase
-# define erase(x) do { if (remove(x) && errno != ENOENT) warn("Failed removing %s", x); } while (0)
+static inline int erase(const char *path)
+{
+	if (remove(path) && errno != ENOENT)
+		return -1;
+	return 0;
+}
 #endif
+
 #ifndef chardev
 # define chardev(x,m,maj,min) mknod((x), S_IFCHR|(m), makedev((maj),(min)))
 #endif
@@ -130,11 +159,6 @@ void    progress_simple(int percent);
 #define NELEMS(array) (sizeof(array) / sizeof(array[0]))
 #endif
 
-/* Mark a function variable as unused, useful for generic callbacks */
-#ifndef UNUSED
-#define UNUSED(x) UNUSED_ ## x __attribute__ ((unused))
-#endif
-
 /* Does directory end with a slash? */
 static inline int fisslashdir(char *dir)
 {
@@ -148,9 +172,9 @@ static inline int fisslashdir(char *dir)
 }
 
 /* Compat */
-#define copy_filep(src,dst)        fcopyfile(src,dst)
-#define pidfile_read_pid(file)     pifile_read(file)
-#define signal_pidfile(file,signo) pidfile_signal(file,signo)
+#define copy_filep(src, dst)        fcopyfile(src, dst)
+#define pidfile_read_pid(file)      pifile_read(file)
+#define signal_pidfile(file, signo) pidfile_signal(file, signo)
 
 #endif /* LITE_H_ */
 

pidfile.c

@@ -1,4 +1,4 @@
-/*	Updated by troglobit for libite/finit/uftpd projects 2016/03/19 */
+/*	Updated by troglobit for libite/finit/uftpd projects 2016/07/04 */
 /*	$OpenBSD: pidfile.c,v 1.11 2015/06/03 02:24:36 millert Exp $	*/
 /*	$NetBSD: pidfile.c,v 1.4 2001/02/19 22:43:42 cgd Exp $	*/
 
@@ -42,7 +42,7 @@
 
 #ifndef pidfile
 static char *pidfile_path = NULL;
-static pid_t pidfile_pid;
+static pid_t pidfile_pid  = 0;
 
 static void pidfile_cleanup(void);
 
@@ -65,7 +65,7 @@ pidfile(const char *basename)
 	atexit_already = 0;
 
 	if (pidfile_path != NULL) {
-		if (pid == pidfile_pid) {
+		if (!access(pidfile_path, R_OK) && pid == pidfile_pid) {
 			utimensat(0, pidfile_path, NULL, 0);
 			return (0);
 		}
@@ -75,8 +75,13 @@ pidfile(const char *basename)
 		atexit_already = 1;
 	}
 
-	if (asprintf(&pidfile_path, "%s%s.pid", __pidfile_path, basename) == -1)
-		return (-1);
+	if (basename[0] != '/') {
+		if (asprintf(&pidfile_path, "%s%s.pid", __pidfile_path, basename) == -1)
+			return (-1);
+	} else {
+		if (asprintf(&pidfile_path, "%s", basename) == -1)
+			return (-1);
+	}
 
 	if ((f = fopen(pidfile_path, "w")) == NULL) {
 		save_errno = errno;
@@ -96,6 +101,7 @@ pidfile(const char *basename)
 		return (-1);
 	}
 	(void) fclose(f);
+	__pidfile_name = pidfile_path;
 
 	/*
 	 * LITE extension, no need to set up another atexit() handler
@@ -114,7 +120,6 @@ pidfile(const char *basename)
 		errno = save_errno;
 		return (-1);
 	}
-	__pidfile_name = pidfile_path;
 
 	return (0);
 }
@@ -122,8 +127,10 @@ pidfile(const char *basename)
 static void
 pidfile_cleanup(void)
 {
-
-	if (pidfile_path != NULL && pidfile_pid == getpid())
+	if (pidfile_path != NULL && pidfile_pid == getpid()) {
 		(void) unlink(pidfile_path);
+		free(pidfile_path);
+		pidfile_path = NULL;
+	}
 }
 #endif

tempfile.c

@@ -45,7 +45,7 @@ FILE *tempfile(void)
 	if (-1 == fd)
 		return NULL;
 
-	return fdopen(fd, "rw");
+	return fdopen(fd, "w+");
 #else
 	return tmpfile(); /* Fallback on older GLIBC/Linux and actual UNIX systems */
 #endif

tests/.gitignore

@@ -12,4 +12,6 @@ pidfile
 progress
 rsync
 tempfile
+touch
 tree
+which

tests/Makefile.am

@@ -11,14 +11,17 @@ TESTS          += fsendfile
 TESTS          += lfile
 TESTS          += makepath
 TESTS          += pidfile
+TESTS          += touch
 TESTS          += progress
 TESTS          += rsync
 TESTS          += tempfile
 TESTS          += tree
+TESTS          += which
 
 check_PROGRAMS  = $(TESTS)
 
 # Ignore warnings about unused result, in e.g. write()
-CFLAGS          = -W -Wall -Wextra -Wno-unused-result
-CPPFLAGS        = -D_GNU_SOURCE
+CFLAGS         += -Wno-unused-result
+CPPFLAGS       += -D_GNU_SOURCE
 LDADD           = -L../ ../libite.la
+LDFLAGS        += -static

tests/check.h

@@ -6,8 +6,11 @@
 #include <string.h>
 #include <time.h>
 
+#include "../conio.h"
 #include "../lite.h"
 
+#define PRINT(args...) if (verbose) printf(args)
+
 #define fail_unless(test)						\
   do {									\
     if (!(test)) {							\
@@ -25,8 +28,8 @@ static inline int test(int result, const char *fmt, ...)
 	char buf[80];
 	size_t len;
 	va_list ap;
-	const char success[] = " \e[1m[ OK ]\e[0m\n";
-	const char failure[] = " \e[7m[FAIL]\e[0m\n";
+	const char success[] = " \033[1m[ OK ]\033[0m\n";
+	const char failure[] = " \033[7m[FAIL]\033[0m\n";
 	const char dots[] = " .....................................................................";
 
 	va_start(ap, fmt);

tests/fexist.c

@@ -1,3 +1,4 @@
+#include <err.h>
 #include "check.h"
 
 int main(void)

tests/fisdir.c

@@ -1,3 +1,4 @@
+#include <err.h>
 #include "check.h"
 
 int main(void)

tests/lfile.c

@@ -1,6 +1,43 @@
 #include <stdio.h>
 #include "check.h"
 
+#define FSTAB "/etc/fstab"
+
+static int fstab(void)
+{
+	int field = 1;
+	char *token;
+	lfile_t *lf;
+
+	lf = lfopen(FSTAB, " \t\n");
+	if (!lf) {
+		perror("Failed opening " FSTAB);
+		return 1;
+	}
+
+	printheader(NULL, "FILE SYSTEM                               MOUNT     OPTIONS            D P", 0);
+	while ((token = lftok(lf))) {
+		if (field == 1)
+			printf("%-41s ", token);
+		if (field == 2)
+			printf("%-9s ", token);
+		if (field == 4)
+			printf("%-17s  ", token);
+		if (field == 5)
+			printf("%d ", atoi(token));
+		if (field == 6) {
+			field = 0;
+			printf("%d\n", atoi(token));
+		}
+
+		field++;
+	}
+
+	lfclose(lf);
+
+	return 0;
+}
+
 int main(void)
 {
 	int val;
@@ -33,5 +70,5 @@ int main(void)
 	}
 	printf("nobody is uid %d\n", val);
 
-	return 0;
+	return fstab();
 }

tests/makepath.c

@@ -1,4 +1,6 @@
 #include <errno.h>
+#include <errno.h>
+#include <libgen.h>
 #include <stdlib.h>
 #include "check.h"
 
@@ -34,27 +36,32 @@ int main(void)
 {
 	int i, ret = 0;
 	char *list[] = {
-		"/tmp/tok/",
-		"/tmp/tok2",
-		"/tmp/ab",
-		"/tmp/b",
-		"/tmp/a/",
-		"/tmp/a/b",
-		"/tmp/a/c/",
-		"../../sometestdir/arpa/inet",
+		"/tmp/libite-test/tok/",
+		"/tmp/libite-test/tok2",
+		"/tmp/libite-test/ab",
+		"/tmp/libite-test/b",
+		"/tmp/libite-test/a/",
+		"/tmp/libite-test/a/b",
+		"/tmp/libite-test/a/c/",
 		NULL
 	};
 
-	for (i = 0; list[i]; i++)
-		rmdir(list[i]);
-
 	printf("Testing makepath() ...\n");
+	mkdir("/tmp/libite-test", 0755);
+
 	for (i = 0; list[i] && !ret; i++)
 		ret |= test_makepath(list[i]);
 
 	printf("\nCleaning up ...\n");
-	for (i = 0; list[i]; i++)
-		rmdir(list[i]);
+	system("rm -rf /tmp/libite-test");
 
 	return ret;
 }
+
+/**
+ * Local Variables:
+ *  indent-tabs-mode: t
+ *  c-file-style:     "linux"
+ *  compile-command:  "make makepath && ./makepath"
+ * End:
+ */

tests/pidfile.c

@@ -1,3 +1,4 @@
+#include <err.h>
 #include <paths.h>
 #include <signal.h>
 #include <stdarg.h>
@@ -5,25 +6,28 @@
 
 #include "check.h"
 
-extern char *__progname;
 extern char *__pidfile_name;
 extern char *__pidfile_path;
 
+static char *ident;
+static char *pidfile_arg;
 static char PIDFILE[42];
 static int verbose = 0;
 static struct stat before, after;
 
-static void sigterm_handler(int UNUSED(signo))
+static void sigterm_handler(int signo)
 {
-	if (verbose)
-		printf("Exiting ...\n");
+	PRINT("Exiting ...\n");
+	remove(PIDFILE);
 }
 
-static void sigalrm_handler(int UNUSED(signo))
+static void sigalrm_handler(int signo)
 {
-	pidfile(NULL);
+	PRINT("Calling pidfile(%s)\n", pidfile_arg ?: "NULL");
+	if (pidfile(pidfile_arg))
+		err(1, "failed creating1 %s", pidfile_arg);
 	if (!fexist(PIDFILE))
-		err(1, "failed creating %s", PIDFILE);
+		err(1, "failed creating2 %s, created %s", PIDFILE, __pidfile_name);
 	stat(PIDFILE, &before);
 }
 
@@ -35,31 +39,40 @@ static int mtime()
 	/* Must sleep a while here otherwise we execute too fast => no mtime change :-( */
 	usleep(10000);
 
-	if (verbose)
-		printf("Calling pidfile() again to update mtime ...\n");
-	pidfile(NULL);
+	PRINT("Calling pidfile() again to update mtime ...\n");
+	if (pidfile(pidfile_arg))
+		err(1, "failed creating3 %s", pidfile_arg);
 	stat(PIDFILE, &after);
 
 	ret = timespec_newer(&after.st_mtim, &before.st_mtim);
-	if (verbose) {
-		printf("Before: %s\n", timespec2str(&before.st_mtim, buf, sizeof(buf)));
-		printf("After : %s\n", timespec2str(&after.st_mtim, buf, sizeof(buf)));
-	}
+	PRINT("Before: %s\n", timespec2str(&before.st_mtim, buf, sizeof(buf)));
+	PRINT("After : %s\n", timespec2str(&after.st_mtim, buf, sizeof(buf)));
 
 	return !ret;
 }
 
-int main(int argc, char *argv[])
+int test_pidfile(char *arg0)
 {
-	if (argc > 1 && !strcmp(argv[1], "-v"))
-		verbose = 1;
+	/* pidfile() argument */
+	pidfile_arg = arg0;
 
-	/* Override default _PATH_VARRUN in pidfile() */
-	__pidfile_path = _PATH_TMP;
-	snprintf(PIDFILE, sizeof(PIDFILE), "%s%s.pid", __pidfile_path, __progname);
+	/* Expected PID file name */
+	if (!arg0)
+		snprintf(PIDFILE, sizeof(PIDFILE), "%s%s.pid", __pidfile_path, ident);
+	else if (arg0[0] != '/')
+		snprintf(PIDFILE, sizeof(PIDFILE), "%s%s.pid", __pidfile_path, arg0);
+	else
+		snprintf(PIDFILE, sizeof(PIDFILE), "%s", arg0);
+
+	PRINT("Verifying pidfile(%s) ... PID: %d\n", PIDFILE, getpid());
+
+	/* Remove any lingering files from previous test runs */
+	remove(PIDFILE);
 
 	signal(SIGTERM, sigterm_handler);
 	signal(SIGALRM, sigalrm_handler);
+
+	/* For signalling test */
 	alarm(1);
 
 	return     test(pidfile_poll(PIDFILE) != getpid(), "Testing pidfile_poll()")
@@ -67,7 +80,50 @@ int main(int argc, char *argv[])
 		|| test(mtime(),                           "Testing mtime update of followup pidfile() call")
 		|| test(pidfile_signal(PIDFILE, SIGTERM),  "Testing signalling ourselves")
 		;
-
-	return 0;
 }
 
+static char *progname(char *arg0)
+{
+       char *nm;
+
+       nm = strrchr(arg0, '/');
+       if (nm)
+	       nm++;
+       else
+	       nm = arg0;
+
+       return nm;
+}
+
+int main(int argc, char *argv[])
+{
+	int ret = 0;
+	size_t i;
+	char *pidfiles[] = {
+		NULL,
+		"pidfile_test1",
+		"/var/tmp/pidfile_test2.pid",
+	};
+
+	if (argc > 1 && !strcmp(argv[1], "-v"))
+		verbose = 1;
+
+	/* Override default _PATH_VARRUN in pidfile() */
+	__pidfile_path = _PATH_TMP;
+
+	/* Find __progname, not all C libraries support this */
+	ident = progname(argv[0]);
+
+	for (i = 0; i < NELEMS(pidfiles); i++)
+		ret += test_pidfile(pidfiles[i]);
+
+	return ret;
+}
+
+/**
+ * Local Variables:
+ *  indent-tabs-mode: t
+ *  c-file-style:     "linux"
+ *  compile-command:  "make pidfile && ./pidfile -v"
+ * End:
+ */

tests/progress.c

@@ -1,7 +1,8 @@
 #include <stdlib.h>		/* atexit() */
 #include <unistd.h>		/* usleep() */
-#include "conio.h"
+
 #include "check.h"
+#include "../conio.h"
 
 #define MAX_WIDTH    80
 #define msleep(msec) usleep(msec * 1000)

tests/tempfile.c

@@ -8,18 +8,29 @@
 #warning O_TMPFILE is missing, either too old GLIBC, Linux, or non-Linux system
 #endif
 
+#define READBACK "Reality is frequently inaccurate.\n"
+
+
 int main(void)
 {
+	int ret;
 	FILE *fp;
+	char buf[80] = "";
 
 	printf("Before tempfile():\n");
-	system("ls -lrt " _PATH_TMP " | tail -3");
+	ret = system("ls -lrt " _PATH_TMP " | tail -3");
 
 	fp = tempfile();
 	fail_unless(fp != NULL);
 
+	ret = fputs(READBACK, fp);
+	rewind(fp);
+	if (fgets(buf, sizeof(buf), fp))
+		fprintf(stderr, "\nRead-back from tempfile: %s", buf);
+	fail_unless(!strcmp(buf, READBACK));
+
 	printf("\nAfter tempfile(), should be same list:\n");
-	system("ls -lrt " _PATH_TMP " | tail -3");
+	ret = system("ls -lrt " _PATH_TMP " | tail -3");
 
 	return fclose(fp);
 }

tests/touch.c

@@ -0,0 +1,61 @@
+#include <err.h>
+#include <paths.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <time.h>
+
+#include "check.h"
+
+int verbose = 0;
+
+
+static int mtime(char *file)
+{
+	int ret;
+	char buf[80];
+	struct stat before, after;
+
+	PRINT("Calling touch() to create file ...\n");
+	touch(file);
+	stat(file, &before);
+
+	/* Must sleep a while here otherwise we execute too fast => no mtime change :-( */
+	usleep(10000);
+
+	PRINT("Calling touch() again to update mtime ...\n");
+	if (touch(file)) {
+		erase(file);
+		err(1, "Failed creating %s", file);
+	}
+	stat(file, &after);
+
+	ret = timespec_newer(&after.st_mtim, &before.st_mtim);
+	PRINT("Before: %s\n", timespec2str(&before.st_mtim, buf, sizeof(buf)));
+	PRINT("After : %s\n", timespec2str(&after.st_mtim, buf, sizeof(buf)));
+
+	return !ret;
+}
+
+int main(int argc, char *argv[])
+{
+	int fd;
+	char file[42] = "/tmp/touch_test.XXXXXX";
+
+	if (argc > 1 && !strcmp(argv[1], "-v"))
+		verbose = 1;
+
+	fd = mkstemp(file);
+	if (fd < 0)
+		err(1, "Failed creating tempfile, %s", file);
+	close(fd);
+
+	return mtime(file);
+}
+
+/**
+ * Local Variables:
+ *  indent-tabs-mode: t
+ *  c-file-style:     "linux"
+ *  compile-command:  "make pidfile && ./pidfile -v"
+ * End:
+ */

tests/which.c

@@ -0,0 +1,49 @@
+#include "check.h"
+
+struct tc {
+	char *cmd;
+	int   exp;
+	int   res;
+};
+
+int main(void)
+{
+	int result = 0;
+	size_t i;
+	struct tc test[] = {
+		{ "ls",          1 },
+		{ "free",        1 },
+		{ "modinfo",     1 },
+		{ "useradd",     1 },
+		{ "/bin/which",  1 },
+		{ "/bin/ps aux", 1 },
+		{ "/etc/passwd", 0 },
+		{ NULL, 0 }
+	};
+
+	for (i = 0; test[i].cmd; i++) {
+		char *path;
+
+		path = which(test[i].cmd);
+		if (!path) {
+			test[i].res = 0;
+			fprintf(stderr, "%20s : Not hot dog\n", test[i].cmd);
+		} else {
+			test[i].res = 1;
+			fprintf(stderr, "%20s : hot dog --> %s\n", test[i].cmd, path);
+			free(path);
+		}
+	}
+
+	for (i = 0; test[i].cmd; i++)
+		result += test[i].exp != test[i].res;
+
+	return result;
+}
+
+/**
+ * Local Variables:
+ *  indent-tabs-mode: t
+ *  c-file-style: "linux"
+ * End:
+ */

tree.c

@@ -59,56 +59,54 @@ static void get_perms(struct stat *st, char *buf, size_t len)
 
 static int descend(char *path, int show_perms, char *pfx)
 {
-	int result = 0;
+	int i, n, result = 0;
 	struct stat st;
+	struct dirent **namelist = NULL;
 
 	if (-1 == lstat(path, &st))
 		return 1;
 
-	if ((st.st_mode & S_IFMT) == S_IFDIR) {
-		int i, n;
-		struct dirent **namelist = NULL;
+	if ((st.st_mode & S_IFMT) != S_IFDIR) {
+		errno = ENOTDIR;
+		return -1;
+	}
 
-		n = scandir(path, &namelist, filter, alphasort);
-		if (n) {
-			for (i = 0; i < n; i++) {
-				char t = ' ', p[14] = "", s[256] = "";
-				char buf[256];
-				char dir[80];
+	n = scandir(path, &namelist, filter, alphasort);
+	if (n) {
+		for (i = 0; i < n; i++) {
+			char t = ' ', p[14] = "", s[256] = "";
+			char buf[256];
+			char dir[80];
 
-				if (i + 1 == n) {
-					printf("%s `- ", pfx);
-					snprintf(dir, sizeof(dir), "%s     ", pfx);
-				} else {
-					printf("%s|-- ", pfx);
-					snprintf(dir, sizeof(dir), "%s|    ", pfx);
-				}
-
-				snprintf(buf, sizeof(buf), "%s/%s", path, namelist[i]->d_name);
-				if (!lstat(buf, &st)) {
-					if (show_perms)
-						get_perms(&st, p, sizeof(p));
-					if ((st.st_mode & S_IFMT) == S_IFDIR)
-						t = '/';
-					if (S_ISLNK(st.st_mode)) {
-						snprintf(s, sizeof(s), "-> ");
-						if (-1 == readlink(buf, &s[3], sizeof(s) - 3))
-							s[0] = 0;
-					}
-				}
-
-				printf("%s%s%c%s\n", p, namelist[i]->d_name, t, s);
-				if (t == '/')
-					result += descend(buf, show_perms, dir);
-
-				free(namelist[i]);
+			if (i + 1 == n) {
+				printf("%s `- ", pfx);
+				snprintf(dir, sizeof(dir), "%s     ", pfx);
+			} else {
+				printf("%s|-- ", pfx);
+				snprintf(dir, sizeof(dir), "%s|    ", pfx);
 			}
 
-			free(namelist);
+			snprintf(buf, sizeof(buf), "%s/%s", path, namelist[i]->d_name);
+			if (!lstat(buf, &st)) {
+				if (show_perms)
+					get_perms(&st, p, sizeof(p));
+				if ((st.st_mode & S_IFMT) == S_IFDIR)
+					t = '/';
+				if (S_ISLNK(st.st_mode)) {
+					snprintf(s, sizeof(s), "-> ");
+					if (-1 == readlink(buf, &s[3], sizeof(s) - 3))
+						s[0] = 0;
+				}
+			}
+
+			printf("%s%s%c%s\n", p, namelist[i]->d_name, t, s);
+			if (t == '/')
+				result += descend(buf, show_perms, dir);
+
+			free(namelist[i]);
 		}
-	} else {
-		errno = ENOTDIR;
-		result = -1;
+
+		free(namelist);
 	}
 
 	return result;

which.c

@@ -0,0 +1,127 @@
+/* C implementation of UNIX which(1)
+ *
+ * Copyright (c) 2017  Joachim Nilsson <troglobit@gmail.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <stdio.h>		/* snprintf() */
+#include <stdlib.h>		/* realloc(), free() */
+#include <string.h>		/* strtok_r() */
+#include <unistd.h>		/* access() */
+
+/* Strip any arguments in "/path/to/bin --some args", modifies input string */
+static char *strip_args(char *path)
+{
+	size_t i = 0;
+
+	if (!path)
+		return NULL;
+
+	/* Find first whitespace (space/tab/etc.) */
+	while (path[i] && !isspace(path[i]))
+		i++;
+	path[i] = 0;
+
+	return path;
+}
+
+/*
+ * Like which(1), returns a malloc'ed path to cmd on success, or NULL
+ */
+char *which(const char *cmd)
+{
+	size_t pathlen = 0;
+	char *ptr, *tok, *env, *path = NULL;
+
+	if (!cmd) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	if (cmd[0] == '/') {
+		path = strip_args(strdup(cmd));
+		if (!path)
+			return NULL;
+
+		if (!access(path, X_OK))
+			return path;
+
+		if (path)
+			free(path);
+
+		return NULL;
+	}
+
+	ptr = getenv("PATH");
+	if (!ptr)
+		return NULL;
+
+	env = strdup(ptr);
+	if (!env)
+		return NULL;
+
+	tok = strtok_r(env, ":", &ptr);
+	while (tok) {
+		size_t len = strlen(tok) + strlen(cmd) + 2;
+
+		if (pathlen < len) {
+			path = realloc(path, len);
+			if (!path) {
+				free(env);
+				return NULL;
+			}
+			pathlen = len;
+		}
+
+		snprintf(path, pathlen, "%s/%s", tok, cmd);
+		path = strip_args(path);
+		if (!path || !access(path, X_OK)) {
+			free(env);
+			return path;
+		}
+
+		tok = strtok_r(NULL, ":", &ptr);
+	}
+
+	if (path)
+		free(path);
+	free(env);
+
+	return NULL;
+}
+
+/*
+ * Like which(), above, but only answers TRUE(1)/FALSE(0)
+ */
+int whichp(const char *cmd)
+{
+	char *path;
+
+	path = which(cmd);
+	if (path) {
+		free(path);
+		return 1;
+	}
+
+	return 0;
+}
+
+/**
+ * Local Variables:
+ *  indent-tabs-mode: t
+ *  c-file-style: "linux"
+ * End:
+ */