Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/clang-tools-extra/test/clang-tidy/cert-env33-c.c

@@ -0,0 +1,20 @@
+// RUN: %check_clang_tidy %s cert-env33-c %t
+
+typedef struct FILE {} FILE;
+
+extern int system(const char *);
+extern FILE *popen(const char *, const char *);
+extern FILE *_popen(const char *, const char *);
+
+void f(void) {
+  // It is permissible to check for the presence of a command processor.
+  system(0);
+
+  system("test");
+  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: calling 'system' uses a command processor [cert-env33-c]
+
+  popen("test", "test");
+  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: calling 'popen' uses a command processor
+  _popen("test", "test");
+  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: calling '_popen' uses a command processor
+}