diff --git a/programs/Makefile b/programs/Makefile
index 1978f66fd..c621b6861 100644
--- a/programs/Makefile
+++ b/programs/Makefile
@@ -99,16 +99,20 @@ install: zstd
@install -d -m 755 $(DESTDIR)$(BINDIR)/ $(DESTDIR)$(MANDIR)/
@install -m 755 zstd$(EXT) $(DESTDIR)$(BINDIR)/zstd$(EXT)
@ln -sf zstd$(EXT) $(DESTDIR)$(BINDIR)/zstdcat
+ @ln -sf zstd$(EXT) $(DESTDIR)$(BINDIR)/unzstd
@echo Installing man pages
@install -m 644 zstd.1 $(DESTDIR)$(MANDIR)/zstd.1
@install -m 644 zstdcat.1 $(DESTDIR)$(MANDIR)/zstdcat.1
+ @install -m 644 unzstd.1 $(DESTDIR)$(MANDIR)/unzstd.1
@echo zstd installation completed
uninstall:
rm -f $(DESTDIR)$(BINDIR)/zstdcat
+ rm -f $(DESTDIR)$(BINDIR)/unzstd
[ -x $(DESTDIR)$(BINDIR)/zstd$(EXT) ] && rm -f $(DESTDIR)$(BINDIR)/zstd$(EXT)
[ -f $(DESTDIR)$(MANDIR)/zstd.1 ] && rm -f $(DESTDIR)$(MANDIR)/zstd.1
[ -f $(DESTDIR)$(MANDIR)/zstdcat.1 ] && rm -f $(DESTDIR)$(MANDIR)/zstdcat.1
+ [ -f $(DESTDIR)$(MANDIR)/unzstd.1 ] && rm -f $(DESTDIR)$(MANDIR)/unzstd.1
@echo zstd programs successfully uninstalled
test: test-zstd test-fullbench test-fuzzer test-mem
diff --git a/programs/unzstd.1 b/programs/unzstd.1
new file mode 100644
index 000000000..157fab765
--- /dev/null
+++ b/programs/unzstd.1
@@ -0,0 +1,31 @@
+\"
+\" unzstd.1: This is a manual page for 'unzstd' program. This file is part of
+\" the zstd project.
+\"
+
+\" No hyphenation
+.hy 0
+.nr HY 0
+
+.TH unzstd "1" "2014-06-20" "unzstd" "User Commands"
+.SH NAME
+\fBunzstd\fR - Utility based on zstd
+
+.SH SYNOPSIS
+.TP 5
+\fBunzstd\fR [\fBOPTIONS\fR] [-|INPUT-FILE]
+
+.SH DESCRIPTION
+.PP
+\fBunzstd\fR is an utility based on \fBzstd\fR, a fast lossless compression algorithm.
+
+\fBunzstd\fR decompress input file, it is equivalent to \fBzstd -d\fR,
+
+Available options are the same as \fBzstd\fR ones (man zstd).
+
+
+.SH BUGS
+Report bugs at:- https://github.com/Cyan4973/zstd/
+
+.SH AUTHOR
+Yann Collet
diff --git a/programs/zstdcli.c b/programs/zstdcli.c
index 7687218c4..11a5ec89c 100644
--- a/programs/zstdcli.c
+++ b/programs/zstdcli.c
@@ -76,6 +76,7 @@
#define WELCOME_MESSAGE "*** %s %i-bits %s, by %s (%s) ***\n", COMPRESSOR_NAME, (int)(sizeof(void*)*8), ZSTD_VERSION, AUTHOR, __DATE__
#define ZSTD_EXTENSION ".zst"
#define ZSTD_CAT "zstdcat"
+#define ZSTD_UNZSTD "unzstd"
#define KB *(1 <<10)
#define MB *(1 <<20)
@@ -172,9 +173,24 @@ int main(int argc, char** argv)
char* dynNameSpace = NULL;
char extension[] = ZSTD_EXTENSION;
+ /* Pick out basename component. Don't rely on stdlib because of conflicting behaviour. */
+ for (i = strlen(programName); i > 0; i--)
+ {
+ if (programName[i] == '/')
+ {
+ i++;
+ break;
+ }
+ }
+ programName += i;
+
/* zstdcat behavior */
if (!strcmp(programName, ZSTD_CAT)) { decode=1; forceStdout=1; displayLevel=1; outFileName=stdoutmark; }
+ /* unzstd behavior */
+ if (!strcmp(programName, ZSTD_UNZSTD))
+ decode=1;
+
// command switches
for(i=1; i