override self/exe

[ginge.git] / loader / override.c

diff --git a/loader/override.c b/loader/override.c
index a9d545b..5a722d9 100644 (file)
--- a/loader/override.c
+++ b/loader/override.c
@@ -268,7 +268,26 @@ static int w_chdir(const char *path)
     ret = 0;
   else
     ret = g_chdir_raw(path);
     ret = 0;
   else
     ret = g_chdir_raw(path);

-  strace("chdir(%s) = %d\n", path, ret);
+
+  strace("chdir(%s) = %ld\n", path, ret);
+  return g_syscall_error(ret);
+}
+
+static ssize_t w_readlink(const char *path, char *buf, size_t bufsiz)
+{
+  long ret;
+
+  if (path != NULL && strncmp(path, "/proc/", 6) == 0
+      && strcmp(strrchr(path, '/'), "/exe") == 0)
+  {
+    ret = snprintf(buf, bufsiz, "%s", bin_path);
+    if (ret > bufsiz)
+      ret = bufsiz;
+  }
+  else
+    ret = g_readlink_raw(path, buf, bufsiz);
+
+  strace("readlink(%s, %s, %zd) = %ld\n", path, buf, bufsiz, ret);

   return g_syscall_error(ret);
 }
 
   return g_syscall_error(ret);
 }
 


@@ -290,6 +309,7 @@ static int w_chdir(const char *path)
 #undef execvp
 #undef execve
 #undef chdir
 #undef execvp
 #undef execve
 #undef chdir

+#undef readlink

 
 #ifdef DL
 
 
 #ifdef DL
 


@@ -320,6 +340,7 @@ MAKE_WRAP_SYM_N(execv);
 MAKE_WRAP_SYM_N(execvp);
 MAKE_WRAP_SYM(execve);
 MAKE_WRAP_SYM_N(chdir);
 MAKE_WRAP_SYM_N(execvp);
 MAKE_WRAP_SYM(execve);
 MAKE_WRAP_SYM_N(chdir);

+MAKE_WRAP_SYM_N(readlink);

 typeof(mmap) mmap2 __attribute__((alias("w_mmap")));
 
 #define REAL_FUNC_NP(name) \
 typeof(mmap) mmap2 __attribute__((alias("w_mmap")));
 
 #define REAL_FUNC_NP(name) \


@@ -446,6 +467,12 @@ int real_chdir(const char *path)
   return g_syscall_error(ret);
 }
 
   return g_syscall_error(ret);
 }
 

+ssize_t real_readlink(const char *path, char *buf, size_t bufsiz)
+{
+  long ret = g_readlink_raw(path, buf, bufsiz);
+  return g_syscall_error(ret);
+}
+

 void real_sleep(unsigned int seconds)
 {
   struct timespec ts = { seconds, 0 };
 void real_sleep(unsigned int seconds)
 {
   struct timespec ts = { seconds, 0 };