cachemgr-warn-solaris-users-of-dangers-of-logging-20021122

[openafs.git] / src / afsd / afsd.c

diff --git a/src/afsd/afsd.c b/src/afsd/afsd.c
index f5a2c8a..e6b2a09 100644 (file)
--- a/src/afsd/afsd.c
+++ b/src/afsd/afsd.c
@@ -1484,6 +1484,37 @@ mainproc(as, arock)
     sprintf(fullpn_VFile,       "%s/",  cacheBaseDir);
     vFilePtr = fullpn_VFile + strlen(fullpn_VFile);
 
+#ifdef AFS_SUN5_ENV
+    {
+       FILE *vfstab;
+       struct mnttab mnt;
+       struct stat statmnt, statci;
+
+       if ((stat(cacheBaseDir, &statci) == 0) &&
+           ((vfstab = fopen(MNTTAB, "r")) != NULL)) {
+           while (getmntent(vfstab, &mnt) == 0) {
+               if (strcmp(cacheBaseDir, mnt.mnt_mountp) != 0) {
+                   char *cp;
+                   int rdev = 0;
+
+                   if (cp = hasmntopt(&mnt, "dev="))
+                       rdev=(int)strtol(cp+strlen("dev="), (char **)NULL, 16);
+
+                   if ((rdev == 0) && (stat(mnt.mnt_mountp, &statmnt) == 0))
+                       rdev=statmnt.st_dev;
+
+                   if ((rdev == statci.st_dev) &&
+                       (hasmntopt (&mnt, "logging") != NULL)) {
+                       printf("WARNING: Mounting a multi-use partition which contains the AFS cache with the\n\"logging\" option may deadlock your system.\n\n");
+                       fflush(stdout);
+                   }
+               }
+           }
+           fclose(vfstab);
+       }
+    }
+#endif
+
 #if 0
     fputs(AFS_GOVERNMENT_MESSAGE, stdout); 
     fflush(stdout);