* NEWS, configure.ac: Version 1.20.91

[chaz/tar] / src / system.c

diff --git a/src/system.c b/src/system.c
index aa3ede42d429c5b0dfa526d7608cae7dd47ffb8b..e57e6dafb6398e6b65d3a5cfb5e4b11fa5445112 100644 (file)
--- a/src/system.c
+++ b/src/system.c
@@ -1,10 +1,10 @@
 /* System-dependent calls for tar.
 
 /* System-dependent calls for tar.
 

-   Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.

 
    This program is free software; you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by the
 
    This program is free software; you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by the

-   Free Software Foundation; either version 2, or (at your option) any later
+   Free Software Foundation; either version 3, or (at your option) any later

    version.
 
    This program is distributed in the hope that it will be useful, but
    version.
 
    This program is distributed in the hope that it will be useful, but


@@ -14,7 +14,7 @@
 
    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
 
    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,

-   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */

 
 #include <system.h>
 
 
 #include <system.h>
 


@@ -22,30 +22,6 @@
 #include <rmt.h>
 #include <signal.h>
 
 #include <rmt.h>
 #include <signal.h>
 

-void
-sys_stat_nanoseconds (struct tar_stat_info *st)
-{
-#if defined(HAVE_STRUCT_STAT_ST_SPARE1)
-  st->atime_nsec = st->stat.st_spare1 * 1000;
-  st->mtime_nsec = st->stat.st_spare2 * 1000;
-  st->ctime_nsec = st->stat.st_spare3 * 1000;
-#elif defined(HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC)
-  st->atime_nsec = st->stat.st_atim.tv_nsec;
-  st->mtime_nsec = st->stat.st_mtim.tv_nsec;
-  st->ctime_nsec = st->stat.st_ctim.tv_nsec;
-#elif defined(HAVE_STRUCT_STAT_ST_ATIMESPEC_TV_NSEC)
-  st->atime_nsec = st->stat.st_atimespec.tv_nsec;
-  st->mtime_nsec = st->stat.st_mtimespec.tv_nsec;
-  st->ctime_nsec = st->stat.st_ctimespec.tv_nsec;
-#elif defined(HAVE_STRUCT_STAT_ST_ATIMENSEC)
-  st->atime_nsec = st->stat.st_atimensec;
-  st->mtime_nsec = st->stat.st_mtimensec;
-  st->ctime_nsec = st->stat.st_ctimensec;
-#else
-  st->atime_nsec  = st->mtime_nsec = st->ctime_nsec = 0;
-#endif
-}
-

 #if MSDOS
 
 bool
 #if MSDOS
 
 bool


@@ -356,12 +332,10 @@ sys_child_open_for_compress (void)
   xclose (parent_pipe[PWRITE]);
 
   /* Check if we need a grandchild tar.  This happens only if either:
   xclose (parent_pipe[PWRITE]);
 
   /* Check if we need a grandchild tar.  This happens only if either:

-     a) we are writing stdout: to force reblocking;
-     b) the file is to be accessed by rmt: compressor doesn't know how;
-     c) the file is not a plain file.  */
+     a) the file is to be accessed by rmt: compressor doesn't know how;
+     b) the file is not a plain file.  */

 
 

-  if (strcmp (archive_name_array[0], "-") != 0
-      && !_remdev (archive_name_array[0])
+  if (!_remdev (archive_name_array[0])

       && is_regular_file (archive_name_array[0]))
     {
       if (backup_option)
       && is_regular_file (archive_name_array[0]))
     {
       if (backup_option)


@@ -369,20 +343,21 @@ sys_child_open_for_compress (void)
 
       /* We don't need a grandchild tar.  Open the archive and launch the
         compressor.  */
 
       /* We don't need a grandchild tar.  Open the archive and launch the
         compressor.  */

-
-      archive = creat (archive_name_array[0], MODE_RW);
-      if (archive < 0)
+      if (strcmp (archive_name_array[0], "-"))

        {
        {

-         int saved_errno = errno;
+         archive = creat (archive_name_array[0], MODE_RW);
+         if (archive < 0)
+           {
+             int saved_errno = errno;

 
 

-         if (backup_option)
-           undo_last_backup ();
-         errno = saved_errno;
-         open_fatal (archive_name_array[0]);
+             if (backup_option)
+               undo_last_backup ();
+             errno = saved_errno;
+             open_fatal (archive_name_array[0]);
+           }
+         xdup2 (archive, STDOUT_FILENO);

        }
        }

-      xdup2 (archive, STDOUT_FILENO);
-      execlp (use_compress_program_option, use_compress_program_option,
-             (char *) 0);
+      execlp (use_compress_program_option, use_compress_program_option, NULL);

       exec_fatal (use_compress_program_option);
     }
 
       exec_fatal (use_compress_program_option);
     }
 


@@ -626,5 +601,294 @@ sys_child_open_for_uncompress (void)
   exit (exit_status);
 }
 
   exit (exit_status);
 }
 

-#endif /* not MSDOS */
+\f
+
+static void
+dec_to_env (char *envar, uintmax_t num)
+{
+  char buf[UINTMAX_STRSIZE_BOUND];
+  char *numstr;
+
+  numstr = STRINGIFY_BIGINT (num, buf);
+  if (setenv (envar, numstr, 1) != 0)
+    xalloc_die ();
+}
+
+static void
+time_to_env (char *envar, struct timespec t)
+{
+  char buf[TIMESPEC_STRSIZE_BOUND];
+  if (setenv (envar, code_timespec (t, buf), 1) != 0)
+    xalloc_die ();
+}
+
+static void
+oct_to_env (char *envar, unsigned long num)
+{
+  char buf[1+1+(sizeof(unsigned long)*CHAR_BIT+2)/3];
+
+  snprintf (buf, sizeof buf, "0%lo", num);
+  if (setenv (envar, buf, 1) != 0)
+    xalloc_die ();
+}
+
+static void
+str_to_env (char *envar, char const *str)
+{
+  if (str)
+    {
+      if (setenv (envar, str, 1) != 0)
+       xalloc_die ();
+    }
+  else
+    unsetenv (envar);
+}
+
+static void
+chr_to_env (char *envar, char c)
+{
+  char buf[2];
+  buf[0] = c;
+  buf[1] = 0;
+  if (setenv (envar, buf, 1) != 0)
+    xalloc_die ();
+}
+
+static void
+stat_to_env (char *name, char type, struct tar_stat_info *st)
+{
+  str_to_env ("TAR_VERSION", PACKAGE_VERSION);
+  chr_to_env ("TAR_FILETYPE", type);
+  oct_to_env ("TAR_MODE", st->stat.st_mode);
+  str_to_env ("TAR_FILENAME", name);
+  str_to_env ("TAR_REALNAME", st->file_name);
+  str_to_env ("TAR_UNAME", st->uname);
+  str_to_env ("TAR_GNAME", st->gname);
+  time_to_env ("TAR_ATIME", st->atime);
+  time_to_env ("TAR_MTIME", st->mtime);
+  time_to_env ("TAR_CTIME", st->ctime);
+  dec_to_env ("TAR_SIZE", st->stat.st_size);
+  dec_to_env ("TAR_UID", st->stat.st_uid);
+  dec_to_env ("TAR_GID", st->stat.st_gid);
+
+  switch (type)
+    {
+    case 'b':
+    case 'c':
+      dec_to_env ("TAR_MINOR", minor (st->stat.st_rdev));
+      dec_to_env ("TAR_MAJOR", major (st->stat.st_rdev));
+      unsetenv ("TAR_LINKNAME");
+      break;
+
+    case 'l':
+    case 'h':
+      unsetenv ("TAR_MINOR");
+      unsetenv ("TAR_MAJOR");
+      str_to_env ("TAR_LINKNAME", st->link_name);
+      break;
+
+    default:
+      unsetenv ("TAR_MINOR");
+      unsetenv ("TAR_MAJOR");
+      unsetenv ("TAR_LINKNAME");
+      break;
+    }
+}
+
+static pid_t global_pid;
+static RETSIGTYPE (*pipe_handler) (int sig);
+
+int
+sys_exec_command (char *file_name, int typechar, struct tar_stat_info *st)
+{
+  int p[2];
+  char *argv[4];
+
+  xpipe (p);
+  pipe_handler = signal (SIGPIPE, SIG_IGN);
+  global_pid = xfork ();
+
+  if (global_pid != 0)
+    {
+      xclose (p[PREAD]);
+      return p[PWRITE];
+    }
+
+  /* Child */
+  xdup2 (p[PREAD], STDIN_FILENO);
+  xclose (p[PWRITE]);
+
+  stat_to_env (file_name, typechar, st);
+
+  argv[0] = "/bin/sh";
+  argv[1] = "-c";
+  argv[2] = to_command_option;
+  argv[3] = NULL;
+
+  execv ("/bin/sh", argv);

 
 

+  exec_fatal (file_name);
+}
+
+void
+sys_wait_command (void)
+{
+  int status;
+
+  if (global_pid < 0)
+    return;
+
+  signal (SIGPIPE, pipe_handler);
+  while (waitpid (global_pid, &status, 0) == -1)
+    if (errno != EINTR)
+      {
+        global_pid = -1;
+        waitpid_error (to_command_option);
+        return;
+      }
+
+  if (WIFEXITED (status))
+    {
+      if (!ignore_command_error_option && WEXITSTATUS (status))
+       ERROR ((0, 0, _("%lu: Child returned status %d"),
+               (unsigned long) global_pid, WEXITSTATUS (status)));
+    }
+  else if (WIFSIGNALED (status))
+    {
+      WARN ((0, 0, _("%lu: Child terminated on signal %d"),
+            (unsigned long) global_pid, WTERMSIG (status)));
+    }
+  else
+    ERROR ((0, 0, _("%lu: Child terminated on unknown reason"),
+           (unsigned long) global_pid));
+
+  global_pid = -1;
+}
+
+int
+sys_exec_info_script (const char **archive_name, int volume_number)
+{
+  pid_t pid;
+  char *argv[4];
+  char uintbuf[UINTMAX_STRSIZE_BOUND];
+  int p[2];
+  static RETSIGTYPE (*saved_handler) (int sig);
+  
+  xpipe (p);
+  saved_handler = signal (SIGPIPE, SIG_IGN);
+
+  pid = xfork ();
+
+  if (pid != 0)
+    {
+      /* Master */
+
+      int rc;
+      int status;
+      char *buf = NULL;
+      size_t size = 0;
+      FILE *fp;
+
+      xclose (p[PWRITE]);
+      fp = fdopen (p[PREAD], "r");
+      rc = getline (&buf, &size, fp);
+      fclose (fp);
+
+      if (rc > 0 && buf[rc-1] == '\n')
+       buf[--rc] = 0;
+
+      while (waitpid (pid, &status, 0) == -1)
+       if (errno != EINTR)
+         {
+           signal (SIGPIPE, saved_handler);
+           waitpid_error (info_script_option);
+           return -1;
+         }
+
+      signal (SIGPIPE, saved_handler);
+      
+      if (WIFEXITED (status))
+       {
+         if (WEXITSTATUS (status) == 0 && rc > 0)
+           *archive_name = buf;
+         else
+           free (buf);
+         return WEXITSTATUS (status);
+       }
+
+      free (buf);
+      return -1;
+    }
+
+  /* Child */
+  setenv ("TAR_VERSION", PACKAGE_VERSION, 1);
+  setenv ("TAR_ARCHIVE", *archive_name, 1);
+  setenv ("TAR_VOLUME", STRINGIFY_BIGINT (volume_number, uintbuf), 1);
+  setenv ("TAR_BLOCKING_FACTOR",
+         STRINGIFY_BIGINT (blocking_factor, uintbuf), 1);
+  setenv ("TAR_SUBCOMMAND", subcommand_string (subcommand_option), 1);
+  setenv ("TAR_FORMAT",
+         archive_format_string (current_format == DEFAULT_FORMAT ?
+                                archive_format : current_format), 1);
+  setenv ("TAR_FD", STRINGIFY_BIGINT (p[PWRITE], uintbuf), 1);
+
+  xclose (p[PREAD]);
+
+  argv[0] = "/bin/sh";
+  argv[1] = "-c";
+  argv[2] = (char*) info_script_option;
+  argv[3] = NULL;
+
+  execv (argv[0], argv);
+
+  exec_fatal (info_script_option);
+}
+
+void
+sys_exec_checkpoint_script (const char *script_name,
+                           const char *archive_name,
+                           int checkpoint_number)
+{
+  pid_t pid;
+  char *argv[4];
+  char uintbuf[UINTMAX_STRSIZE_BOUND];
+
+  pid = xfork ();
+
+  if (pid != 0)
+    {
+      /* Master */
+
+      int status;
+
+      while (waitpid (pid, &status, 0) == -1)
+       if (errno != EINTR)
+         {
+           waitpid_error (script_name);
+           break;
+         }
+
+      return;
+    }
+
+  /* Child */
+  setenv ("TAR_VERSION", PACKAGE_VERSION, 1);
+  setenv ("TAR_ARCHIVE", archive_name, 1);
+  setenv ("TAR_CHECKPOINT", STRINGIFY_BIGINT (checkpoint_number, uintbuf), 1);
+  setenv ("TAR_BLOCKING_FACTOR",
+         STRINGIFY_BIGINT (blocking_factor, uintbuf), 1);
+  setenv ("TAR_SUBCOMMAND", subcommand_string (subcommand_option), 1);
+  setenv ("TAR_FORMAT",
+         archive_format_string (current_format == DEFAULT_FORMAT ?
+                                archive_format : current_format), 1);
+  argv[0] = "/bin/sh";
+  argv[1] = "-c";
+  argv[2] = (char*) script_name;
+  argv[3] = NULL;
+
+  execv (argv[0], argv);
+
+  exec_fatal (script_name);
+}
+
+#endif /* not MSDOS */