Disallow empty output directory
diff --git a/programs/zstdcli.c b/programs/zstdcli.c
index fbacb90..1143ac3 100644
--- a/programs/zstdcli.c
+++ b/programs/zstdcli.c
@@ -1011,7 +1011,14 @@
if (longCommandWArg(&argument, "--stream-size=")) { streamSrcSize = readSizeTFromChar(&argument); continue; }
if (longCommandWArg(&argument, "--target-compressed-block-size=")) { targetCBlockSize = readSizeTFromChar(&argument); continue; }
if (longCommandWArg(&argument, "--size-hint=")) { srcSizeHint = readSizeTFromChar(&argument); continue; }
- if (longCommandWArg(&argument, "--output-dir-flat")) { NEXT_FIELD(outDirName); continue; }
+ if (longCommandWArg(&argument, "--output-dir-flat")) {
+ NEXT_FIELD(outDirName);
+ if (strlen(outDirName) == 0) {
+ DISPLAY("error: output dir cannot be empty string (did you mean to pass '.' instead?)\n");
+ CLEAN_RETURN(1);
+ }
+ continue;
+ }
if (longCommandWArg(&argument, "--auto-threads")) {
const char* threadDefault = NULL;
NEXT_FIELD(threadDefault);
@@ -1020,7 +1027,14 @@
continue;
}
#ifdef UTIL_HAS_MIRRORFILELIST
- if (longCommandWArg(&argument, "--output-dir-mirror")) { NEXT_FIELD(outMirroredDirName); continue; }
+ if (longCommandWArg(&argument, "--output-dir-mirror")) {
+ NEXT_FIELD(outMirroredDirName);
+ if (strlen(outMirroredDirName) == 0) {
+ DISPLAY("error: output dir cannot be empty string (did you mean to pass '.' instead?)\n");
+ CLEAN_RETURN(1);
+ }
+ continue;
+ }
#endif
#ifndef ZSTD_NOTRACE
if (longCommandWArg(&argument, "--trace")) { char const* traceFile; NEXT_FIELD(traceFile); TRACE_enable(traceFile); continue; }
diff --git a/tests/cli-tests/basic/output_dir.sh b/tests/cli-tests/basic/output_dir.sh
new file mode 100755
index 0000000..a8819d2
--- /dev/null
+++ b/tests/cli-tests/basic/output_dir.sh
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+println "+ zstd -r * --output-dir-mirror=\"\""
+zstd -r * --output-dir-mirror="" && die "Should not allow empty output dir!"
+println "+ zstd -r * --output-dir-flat=\"\""
+zstd -r * --output-dir-flat="" && die "Should not allow empty output dir!"
+exit 0
diff --git a/tests/cli-tests/basic/output_dir.sh.stderr.exact b/tests/cli-tests/basic/output_dir.sh.stderr.exact
new file mode 100644
index 0000000..e12b504
--- /dev/null
+++ b/tests/cli-tests/basic/output_dir.sh.stderr.exact
@@ -0,0 +1,2 @@
+error: output dir cannot be empty string (did you mean to pass '.' instead?)
+error: output dir cannot be empty string (did you mean to pass '.' instead?)
diff --git a/tests/cli-tests/basic/output_dir.sh.stdout.exact b/tests/cli-tests/basic/output_dir.sh.stdout.exact
new file mode 100644
index 0000000..1e478cd
--- /dev/null
+++ b/tests/cli-tests/basic/output_dir.sh.stdout.exact
@@ -0,0 +1,2 @@
++ zstd -r * --output-dir-mirror=""
++ zstd -r * --output-dir-flat=""
