1 files changed, 69 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libugly/system.c b/mdk-stage1/dietlibc/libugly/system.c
new file mode 100644
index 000000000..b9eea20eb
--- /dev/null
+++ b/mdk-stage1/dietlibc/libugly/system.c
@@ -0,0 +1,69 @@
+#include <signal.h>
+#include <asm/errno.h>
+#include <errno.h>
+#include <unistd.h>
+#include "dietwarning.h"
+
+#define SHELL_PATH      "/bin/sh"       /* Path of the shell.  */
+#define SHELL_NAME      "sh"            /* Name to give it.  */
+
+extern char **environ;
+
+int __libc_fork();
+int __libc_waitpid(int pid, int *status, int options);
+int execve(const char*filename, char *const argv[], char *const envp[]);
+void __set_errno(int errno);
+int sigaction(int signum,  const  struct  sigaction  *act, struct sigaction *oldact);
+
+int __libc_system (const char *line)
+{
+  struct sigaction sa, intr, quit;
+  int save,pid,ret=-1;
+
+  if (line == 0) return __libc_system("exit 0") == 0;
+
+  sa.sa_handler = SIG_IGN;
+  sa.sa_flags = 0;
+  sigemptyset (&sa.sa_mask);
+
+  if (sigaction(SIGINT,  &sa, &intr)<0) return -1;
+  if (sigaction(SIGQUIT, &sa, &quit)<0) {
+    save = errno;
+    sigaction (SIGINT, &intr, (struct sigaction*)0);
+    __set_errno (save);
+    return -1;
+  }
+
+  pid=__libc_fork();
+  if (pid>0)
+  { /* parent */
+    int n;
+    do
+      n=__libc_waitpid(pid, &ret, 0);
+    while ((n==-1) && (errno==EINTR));
+    if (n!=pid) ret=-1;
+  }
+  else if (!pid)
+  { /* child */
+    const char *nargs[4];
+    nargs[0] = SHELL_NAME;
+    nargs[1] = "-c";
+    nargs[2] = line;
+    nargs[3] = 0;
+
+    sigaction(SIGINT,  &intr, (struct sigaction*)0);
+    sigaction(SIGQUIT, &quit, (struct sigaction*)0);
+
+    execve(SHELL_PATH,(char *const *)nargs, environ);
+    _exit(127);
+  }
+  save = errno;
+  sigaction (SIGINT,  &intr, (struct sigaction *)0);
+  sigaction (SIGQUIT, &quit, (struct sigaction *)0);
+  __set_errno(save);
+  return ret;
+}
+
+int system (const char *line) __attribute__((weak,alias("__libc_system")));
+
+link_warning("system","warning: system() is a security risk.  Use fork and execvp instead!")