util-vserver-0.30.208

[util-vserver.git] / vserver-start / scriptlets.c

diff --git a/vserver-start/scriptlets.c b/vserver-start/scriptlets.c
new file mode 100644 (file)
index 0000000..9c0df65
--- /dev/null
+++ b/vserver-start/scriptlets.c
@@ -0,0 +1,171 @@
+// $Id: scriptlets.c,v 1.3 2004/10/19 21:11:10 ensc Exp $    --*- c -*--
+
+// Copyright (C) 2004 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
+//  
+// 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; version 2 of the License.
+//  
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//  
+// 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.
+
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include "vserver-start.h"
+
+#include <pathconfig.h>
+#include <lib_internal/command.h>
+#include <lib_internal/util.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/param.h>
+#include <unistd.h>
+#include <dirent.h>
+
+#define HAS_SUFFIX(STR, LEN, SUF) \
+  (LEN>sizeof(SUF) && strcmp(STR+LEN-sizeof(SUF), SUF)==0)
+
+static bool
+visitFile(char const *fname, char const *vname, char const *style)
+{
+  struct stat          st;
+  struct Command       cmd;
+
+  if (stat(fname, &st)==-1 ||
+      !S_ISREG(st.st_mode))
+    return false;
+
+  if ((st.st_mode & 0111)==0) {
+    WRITE_MSG(2,
+             "!!!LEGACY ALERT!!!\n"
+             "The special handling of non-executable scriptlets which allows to\n"
+             "override environment variables is not supported anymore. This change\n"
+             "was needed as 'vserver ... start' is done by a native C program now.\n"
+             "If you need the old functionality please fill a bugreport so that\n"
+             "workarounds can be found/implemented.\n"
+             "The file triggering this message was\n"
+             "    '");
+    WRITE_STR(2, fname);
+    WRITE_MSG(2, "'\n");
+
+    return false;
+  }
+
+  char const *par[] = { fname, style, vname, 0 };
+  Command_setParams(&cmd, par);
+
+  if (!Command_exec(&cmd, true) ||
+      !Command_wait(&cmd, true)) {
+    WRITE_MSG(2, "vserver-start: exec('");
+    WRITE_STR(2, fname);
+    WRITE_MSG(2, "'): ");
+    WRITE_STR(2, strerror(cmd.err));
+    WRITE_MSG(2, "; aborting...\n");
+
+    exit(1);
+  }
+
+  if (cmd.rc!=0) {
+    WRITE_MSG(2, "vserver-start: scriptlet '");
+    WRITE_STR(2, fname);
+    WRITE_MSG(2, "' failed; aborting...\n");
+    
+    exit (1);
+  }
+
+  Command_free(&cmd);
+
+  return true;
+}
+
+static bool
+visitDirentry(PathInfo const *basepath, char const *d_name,
+             char const *vname,
+             char const *style)
+{
+  size_t               l = strlen(d_name);
+  char                 path[basepath->l + l + 1];
+  char *               ptr;
+
+  if (isDotfile(d_name) ||
+      HAS_SUFFIX(d_name, l, ".rpmnew") ||
+      HAS_SUFFIX(d_name, l, ".rpmsave") ||
+      HAS_SUFFIX(d_name, l, ".rpmorig") ||
+      HAS_SUFFIX(d_name, l, ".cfsaved"))
+    return false;
+
+  ptr  = Xmemcpy(path, basepath->d, basepath->l);
+  ptr  = Xmemcpy(ptr,  d_name,      l);
+  *ptr = '\0';
+  
+  return visitFile(path, vname, style);
+}
+
+static bool
+visitPath(PathInfo const *basepath,
+         char const *vname,
+         PathInfo const *style)
+{
+  char         tmp[basepath->l + style->l + sizeof(".d/")];
+  PathInfo     path = { .d = tmp };
+  char *       ptr;
+  DIR *                dir;
+  bool         did_something = false;
+
+  ptr  = Xmemcpy(tmp, basepath->d, basepath->l);
+  ptr  = Xmemcpy(ptr, style->d,    style->l);
+  *ptr = '\0';
+  path.l = ptr-tmp;
+
+  did_something = visitFile(path.d, vname, style->d) || did_something;
+
+  ptr = Xmemcpy(ptr, ".d/", sizeof(".d/"));
+  path.l = ptr-tmp;
+  
+  dir = opendir(tmp);
+  while (dir) {
+    struct dirent *ent =  readdir(dir);
+    if (ent==0) break;
+
+    did_something = visitDirentry(&path, ent->d_name, vname, style->d) || did_something;
+  }
+  if (dir!=0) closedir(dir);
+
+  return did_something;
+}
+
+void
+execScriptlets(PathInfo const *cfgdir, char const *vname, char const *style)
+{
+  char         path_buf[MAX(cfgdir->l, sizeof(CONFDIR "/.defaults")) +
+                        sizeof("/scripts/")];
+  PathInfo     basepath = { .d = path_buf };
+  PathInfo     styledir = {
+    .d = style,
+    .l = strlen(style)
+  };
+  char *       ptr;
+  bool         doit = true;
+
+  ptr        = Xmemcpy(path_buf, cfgdir->d, cfgdir->l);
+  ptr        = Xmemcpy(ptr,      "/scripts/", sizeof("/scripts/"));
+  basepath.l = ptr-path_buf-1;
+  doit       = !visitPath(&basepath, vname, &styledir);
+
+  if (doit) {
+    ptr = Xmemcpy(path_buf, CONFDIR "/.defaults/scripts/",
+                 sizeof(CONFDIR "/.defaults/scripts/"));
+    basepath.l = ptr-path_buf-1;
+    doit = !visitPath(&basepath, vname, &styledir);
+  }
+}