Changeset 3911 for trunk

Timestamp:

Oct 24, 2014, 12:49:58 PM (11 years ago)

Author:

bird

Message:

0.6,trunk: Introducing env var UNIXROOT_CHROOTED for faking chroot chdir (the latter for preserving whatever is the current dir + drive, unless we're inside (under) the unixroot).

File:

• trunk/libc/src/kNIX/os2/fs-os2.c (modified) (5 diffs)

trunk/libc/src/kNIX/os2/fs-os2.c

@@ -217 +217 @@
 {
     LIBCLOG_ENTER("\n");
+    APIRET rc;
 /** @todo getenv doesn't work at this point. :( */
 
@@ -262 +263 @@
         if (pInherit)
             __libc_spmInheritRelease();
+
         /*
          * Setup unofficial unixroot.
          */
         const char *psz = getenv("UNIXROOT");
-        if (psz)
+        if (   psz
+            && ((psz[0] >= 'A' && psz[0] <= 'Z') || (psz[0] >= 'a' && psz[0] <= 'z'))
+            && psz[1] == ':'
+            && (psz[2] == '\\' || psz[2] == '/')
+            )
         {
             LIBCLOG_MSG("Unofficial unixroot=%s\n", psz);
@@ -276 +282 @@
             }
             memcpy(&__libc_gszUnixRoot[0], psz, cch + 1);
+
+            /* Clean it up a tiny little bit. */
+            if (__libc_gszUnixRoot[0] >= 'a')
+                __libc_gszUnixRoot[0] -= 'a' - 'A';
+
+            size_t off = cch;
+            while (off-- > 0)
+                if (__libc_gszUnixRoot[off] == '\\')
+                    __libc_gszUnixRoot[off] = '/';
 
             /* Register the rewrite rule. */
@@ -281 +296 @@
             if (__libc_PathRewriteAdd(&gUnixRootRewriteRule, 1))
                 LIBCLOG_RETURN_INT(-1);
-        }
+
+            /* Should we pretend chroot($UNIXROOT) + chdir()? */
+            psz = getenv("UNIXROOT_CHROOTED");
+            if (psz && *psz != '\0')
+            {
+                __libc_gcchUnixRoot = cch;
+
+                ULONG ulDisk, ulIgnored;
+                rc = DosQueryCurrentDisk(&ulDisk, &ulIgnored);
+                if (   rc == NO_ERROR
+                    && ulDisk + 'A' - 1 == __libc_gszUnixRoot[0])
+                {
+                    if (cch == 3)
+                        __libc_gfInUnixTree = 1;
+                    else
+                    {
+                        char szCurDir[PATH_MAX];
+                        ULONG cbCurDir = sizeof(szCurDir);
+                        rc = DosQueryCurrentDir(0, (PSZ)&szCurDir[0], &cbCurDir);
+                        __libc_gfInUnixTree = rc == NO_ERROR
+                                           && cch <= cbCurDir + 3
+                                           && memicmp(&__libc_gszUnixRoot[3], szCurDir, cch - 3) == 0
+                                           && (   cch == cbCurDir + 3
+                                               || szCurDir[cch - 3] == '\\');
+                    }
+
+                }
+                LIBCLOG_MSG(__libc_gfInUnixTree ? "Inside unixroot chroot.\n" : "Outside unixroot chroot.\n");
+            }
+        }
+        else if (psz)
+            LIBCLOG_MSG("Invalid UNIXROOT=\"%s\" - must start with drive letter and root slash.\n", psz);
     }
 
@@ -291 +337 @@
     PPIB pPib;
     DosGetInfoBlocks(&pTib, &pPib);
-    APIRET rc = DosQueryModuleName(pPib->pib_hmte, sizeof(__libc_gszExecPath), &__libc_gszExecPath[0]);
+    rc = DosQueryModuleName(pPib->pib_hmte, sizeof(__libc_gszExecPath), &__libc_gszExecPath[0]);
     if (!rc)
     {