Try shell in posix_spawn* only in compat mode

ChangeLog

@@ -1,5 +1,20 @@
 2011-09-05  Ulrich Drepper  <drepper@gmail.com>
 
+	[BZ #13134]
+	* sysdeps/posix/spawni.c (script_execute): Define only for compatibility
+	before glibc 2.15.
+	(tryshell): Define.
+	(__spawni): Change last parameter to be flag.  Test
+	SPAWN_XFLAGS_USE_PATH flag to use path or not.
+	Don't try to use shell unless SPAWN_XFLAGS_TRY_SHELL is set.
+	* sysdeps/mach/hurd/spawni.c: Change last parameter and adjust user.
+	* posix/spawni.c: Likewise.
+	* posix/spawn.c: Add compat version which passed SPAWN_XFLAGS_TRY_SHELL.
+	* posix/spawnp.c: Likewise.  Change normal version to use
+	SPAWN_XFLAGS_USE_PATH.
+	* posix/spawn_int.c: Define SPAWN_XFLAGS_USE_PATH and
+	SPAWN_XFLAGS_TRY_SHELL.
+
 	[BZ #13150]
 	* posix/glob.h: Remove gcc 1.x support.
 

NEWS

@@ -10,7 +10,7 @@ Version 2.15
 * The following bugs are resolved with this release:
 
   9696, 12868, 12852, 12874, 12885, 12907, 12922, 12935, 13007, 13021,
-  13068, 13114, 13144, 13150
+  13068, 13114, 13134, 13144, 13150
 
 * New program pldd to list loaded object of a process
   Implemented by Ulrich Drepper.

posix/spawn.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2000 Free Software Foundation, Inc.
+/* Copyright (C) 2000, 2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -18,14 +18,31 @@
 
 #include <spawn.h>
 #include "spawn_int.h"
+#include <shlib-compat.h>
 
 /* Spawn a new process executing PATH with the attributes describes in *ATTRP.
    Before running the process perform the actions described in FILE-ACTIONS. */
 int
-posix_spawn (pid_t *pid, const char *path,
+__posix_spawn (pid_t *pid, const char *path,
-	     const posix_spawn_file_actions_t *file_actions,
+	       const posix_spawn_file_actions_t *file_actions,
-	     const posix_spawnattr_t *attrp, char *const argv[],
+	       const posix_spawnattr_t *attrp, char *const argv[],
-	     char *const envp[])
+	       char *const envp[])
 {
   return __spawni (pid, path, file_actions, attrp, argv, envp, 0);
 }
+versioned_symbol (libc, __posix_spawn, posix_spawn, GLIBC_2_15);
+
+
+#if SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_15)
+int
+attribute_compat_text_section
+__posix_spawn_compat (pid_t *pid, const char *file,
+		      const posix_spawn_file_actions_t *file_actions,
+		      const posix_spawnattr_t *attrp, char *const argv[],
+		      char *const envp[])
+{
+  return __spawni (pid, file, file_actions, attrp, argv, envp,
+		   SPAWN_XFLAGS_TRY_SHELL);
+}
+compat_symbol (libc, __posix_spawn_compat, posix_spawn, GLIBC_2_2);
+#endif

posix/spawn_int.h

@@ -29,10 +29,13 @@ struct __spawn_action
   } action;
 };
 
+#define SPAWN_XFLAGS_USE_PATH	0x1
+#define SPAWN_XFLAGS_TRY_SHELL	0x2
+
 extern int __posix_spawn_file_actions_realloc (posix_spawn_file_actions_t *
 					       file_actions);
 
 extern int __spawni (pid_t *pid, const char *path,
 		     const posix_spawn_file_actions_t *file_actions,
 		     const posix_spawnattr_t *attrp, char *const argv[],
-		     char *const envp[], int use_path);
+		     char *const envp[], int xflags);

posix/spawni.c

@@ -1,5 +1,5 @@
 /* Guts of POSIX spawn interface.  Stub version.
-   Copyright (C) 2001 Free Software Foundation, Inc.
+   Copyright (C) 2001, 2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -36,7 +36,7 @@ int
 __spawni (pid_t *pid, const char *file,
 	  const posix_spawn_file_actions_t *file_actions,
 	  const posix_spawnattr_t *attrp, char *const argv[],
-	  char *const envp[], int use_path)
+	  char *const envp[], int xflags)
 {
   __set_errno (ENOSYS);
   return -1;

posix/spawnp.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2000 Free Software Foundation, Inc.
+/* Copyright (C) 2000, 2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -18,14 +18,32 @@
 
 #include <spawn.h>
 #include "spawn_int.h"
+#include <shlib-compat.h>
 
 /* Spawn a new process executing FILE with the attributes describes in *ATTRP.
    Before running the process perform the actions described in FILE-ACTIONS. */
 int
-posix_spawnp (pid_t *pid, const char *file,
+__posix_spawnp (pid_t *pid, const char *file,
-	      const posix_spawn_file_actions_t *file_actions,
+		const posix_spawn_file_actions_t *file_actions,
-	      const posix_spawnattr_t *attrp, char *const argv[],
+		const posix_spawnattr_t *attrp, char *const argv[],
-	      char *const envp[])
+		char *const envp[])
 {
-  return __spawni (pid, file, file_actions, attrp, argv, envp, 1);
+  return __spawni (pid, file, file_actions, attrp, argv, envp,
+		   SPAWN_XFLAGS_USE_PATH);
 }
+versioned_symbol (libc, __posix_spawnp, posix_spawnp, GLIBC_2_15);
+
+
+#if SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_15)
+int
+attribute_compat_text_section
+__posix_spawnp_compat (pid_t *pid, const char *file,
+		       const posix_spawn_file_actions_t *file_actions,
+		       const posix_spawnattr_t *attrp, char *const argv[],
+		       char *const envp[])
+{
+  return __spawni (pid, file, file_actions, attrp, argv, envp,
+		   SPAWN_XFLAGS_USE_PATH | SPAWN_XFLAGS_TRY_SHELL);
+}
+compat_symbol (libc, __posix_spawnp_compat, posix_spawnp, GLIBC_2_2);
+#endif

sysdeps/mach/hurd/spawni.c

@@ -1,5 +1,5 @@
 /* spawn a new process running an executable.  Hurd version.
-   Copyright (C) 2001,02,04 Free Software Foundation, Inc.
+   Copyright (C) 2001,02,04,11 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -41,7 +41,7 @@ __spawni (pid_t *pid, const char *file,
 	  const posix_spawn_file_actions_t *file_actions,
 	  const posix_spawnattr_t *attrp,
 	  char *const argv[], char *const envp[],
-	  int use_path)
+	  int xflags)
 {
   pid_t new_pid;
   char *path, *p, *name;
@@ -391,7 +391,7 @@ __spawni (pid_t *pid, const char *file,
 
 	/* Make sure the dtable can hold NEWFD.  */
 #define EXPAND_DTABLE(newfd)						      \
-	({ 								      \
+	({								      \
 	  if ((unsigned int)newfd >= dtablesize				      \
 	      && newfd < _hurd_rlimits[RLIMIT_OFILE].rlim_cur)		      \
 	    {								      \
@@ -399,7 +399,7 @@ __spawni (pid_t *pid, const char *file,
 	      NEW_TABLE (dtable, newfd);				      \
 	      NEW_TABLE (ulink_dtable, newfd);				      \
 	      NEW_TABLE (dtable_cells, newfd);				      \
-	      dtablesize = newfd + 1;		       		       	      \
+	      dtablesize = newfd + 1;					      \
 	    }								      \
 	  ((unsigned int)newfd < dtablesize ? 0 : EMFILE);		      \
 	})
@@ -543,7 +543,7 @@ __spawni (pid_t *pid, const char *file,
      conditions are diagnosed first and what side effects (file creation,
      etc) can be observed before what errors.  */
 
-  if (! use_path || strchr (file, '/') != NULL)
+  if ((xflags & SPAWN_XFLAGS_USE_PATH) == 0 || strchr (file, '/') != NULL)
     /* The FILE parameter is actually a path.  */
     err = child_lookup (file, O_EXEC, 0, &execfile);
   else

sysdeps/posix/spawni.c

@@ -28,6 +28,7 @@
 #include "spawn_int.h"
 #include <not-cancel.h>
 #include <local-setxid.h>
+#include <shlib-compat.h>
 
 
 /* The Unix standard contains a long explanation of the way to signal
@@ -38,6 +39,7 @@
 #define SPAWN_ERROR	127
 
 
+#if SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_15)
 /* The file is accessible but it is not an executable file.  Invoke
    the shell to interpret it as a script.  */
 static void
@@ -64,6 +66,10 @@ script_execute (const char *file, char *const argv[], char *const envp[])
     __execve (new_argv[0], new_argv, envp);
   }
 }
+# define tryshell (xflags & SPAWN_XFLAGS_TRY_SHELL)
+#else
+# define tryshell 0
+#endif
 
 
 /* Spawn a new process executing PATH with the attributes describes in *ATTRP.
@@ -72,7 +78,7 @@ int
 __spawni (pid_t *pid, const char *file,
 	  const posix_spawn_file_actions_t *file_actions,
 	  const posix_spawnattr_t *attrp, char *const argv[],
-	  char *const envp[], int use_path)
+	  char *const envp[], int xflags)
 {
   pid_t new_pid;
   char *path, *p, *name;
@@ -226,12 +232,12 @@ __spawni (pid_t *pid, const char *file,
 	}
     }
 
-  if (! use_path || strchr (file, '/') != NULL)
+  if ((xflags & SPAWN_XFLAGS_USE_PATH) == 0 || strchr (file, '/') != NULL)
     {
       /* The FILE parameter is actually a path.  */
       __execve (file, argv, envp);
 
-      if (errno == ENOEXEC)
+      if (tryshell && errno == ENOEXEC)
 	script_execute (file, argv, envp);
 
       /* Oh, oh.  `execve' returns.  This is bad.  */
@@ -277,7 +283,7 @@ __spawni (pid_t *pid, const char *file,
       /* Try to execute this name.  If it works, execv will not return.  */
       __execve (startp, argv, envp);
 
-      if (errno == ENOEXEC)
+      if (tryshell && errno == ENOEXEC)
 	script_execute (startp, argv, envp);
 
       switch (errno)