Changeset 33337 in vbox

Timestamp:

Oct 22, 2010 10:24:50 AM (15 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

66918

Message:

iprt: introduced RTSymlink() and RTReadLink() (thanks Brian Campbell)

Location:

trunk

Files:

• include/iprt/path.h (modified) (2 diffs)
• src/VBox/Runtime/r3/posix/path-posix.cpp (modified) (2 diffs)
• src/VBox/Runtime/r3/win/path-win.cpp (modified) (2 diffs)

trunk/include/iprt/path.h

@@ -642 +642 @@
 
 /**
+ * Returns the destination of a symbolic link.
+ *
+ * @returns IPRT status code.
+ * @param   pszPath     Path to the file system object.
+ * @param   pszDestLink Where to store the destination path.
+ * @param   cchDestLink Size of the buffer.
+ */
+RTR3DECL(int) RTReadLink(const char *pszPath, char *pszDestLink, size_t cchDestLink);
+
+/**
  * Changes the mode flags of a file system object.
  *
@@ -795 +805 @@
 RTR3DECL(int) RTPathRename(const char *pszSrc,  const char *pszDst, unsigned fRename);
 
+/**
+ * Creates a symlink from new path to old path.
+ *
+ * @returns IPRT status code.
+ * @param   pszNewPath  The path for the new symlink.
+ * @param   pszOldPath  The destination path for the symlink (i.e. the content of
+ *                      pszNewPath).
+ */
+RTR3DECL(int) RTSymlink(const char *pszNewPath, const char *pszOldPath);
+
 #endif /* IN_RING3 */
 

trunk/src/VBox/Runtime/r3/posix/path-posix.cpp

@@ -479 +479 @@
 }
 
+RTR3DECL(int) RTReadLink(const char *pszPath, char *pszDestLink, size_t cchDestLink)
+{
+    char szNativeDest[RTPATH_MAX];
+
+    /*
+     * Validate input.
+     */
+    AssertPtrReturn(pszPath, VERR_INVALID_POINTER);
+    AssertReturn(*pszPath, VERR_INVALID_PARAMETER);
+    AssertPtrReturn(pszDestLink, VERR_INVALID_POINTER);
+
+    /*
+     * Convert the filename.
+     */
+    char const *pszNativePath;
+    int rc = rtPathToNative(&pszNativePath, pszPath, NULL);
+    if (RT_SUCCESS(rc))
+    {
+        ssize_t cchLink = readlink(pszNativePath, szNativeDest, RTPATH_MAX-1);
+        if (RT_LIKELY(cchLink != -1))
+        {
+            szNativeDest[RT_MIN(cchLink, (ssize_t)sizeof(RTPATH_MAX-1))] = '\0';
+            rc = rtPathFromNativeCopy(pszDestLink, cchDestLink, szNativeDest, NULL);
+        }
+        else
+            rc = RTErrConvertFromErrno(errno);
+
+        rtPathFreeNative(pszNativePath, pszPath);
+    }
+
+    LogFlow(("RTReadlink(%p:{%s}, pObjInfo=%p): returns %Rrc\n",
+             pszPath, pszPath, pObjInfo, rc));
+    return rc;
+}
 
 RTR3DECL(int) RTPathSetTimes(const char *pszPath, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime,
@@ -868 +902 @@
 
 
+RTR3DECL(int) RTSymlink(const char *pszNewPath, const char *pszOldPath)
+{
+    /*
+     * Validate input.
+     */
+    AssertMsgReturn(VALID_PTR(pszNewPath), ("%p\n", pszNewPath), VERR_INVALID_POINTER);
+    AssertMsgReturn(VALID_PTR(pszOldPath), ("%p\n", pszOldPath), VERR_INVALID_POINTER);
+    AssertMsgReturn(*pszNewPath, ("%p\n", pszNewPath), VERR_INVALID_PARAMETER);
+    AssertMsgReturn(*pszOldPath, ("%p\n", pszOldPath), VERR_INVALID_PARAMETER);
+
+    /*
+     * Convert the filenames.
+     */
+    char const *pszNativeNewPath;
+    char const *pszNativeOldPath;
+    int rc = rtPathToNative(&pszNativeNewPath, pszNewPath, NULL);
+    if (RT_SUCCESS(rc))
+    {
+        rc = rtPathToNative(&pszNativeOldPath, pszOldPath, NULL);
+        if (RT_SUCCESS(rc))
+        {
+            if (symlink(pszOldPath, pszNewPath) == -1)
+                rc = RTErrConvertFromErrno(errno);
+
+            rtPathFreeNative(pszNativeOldPath, pszOldPath);
+        }
+        rtPathFreeNative(pszNativeNewPath, pszNewPath);
+    }
+
+    return rc;
+}
+
+
 RTDECL(bool) RTPathExists(const char *pszPath)
 {

trunk/src/VBox/Runtime/r3/win/path-win.cpp

@@ -298 +298 @@
 
     return VINF_SUCCESS;
+}
+
+
+RTR3DECL(int) RTReadLink(const char *pszPath, char *pszDestLink, size_t cchDestLink)
+{
+    return VERR_NOT_IMPLEMENTED;
 }
 
@@ -499 +505 @@
 
 
+RTR3DECL(int) RTSymlink(const char *pszNewPath, const char *pszOldPath)
+{
+    return VERR_NOT_IMPLEMENTED;
+}
+
+
 RTDECL(bool) RTPathExists(const char *pszPath)
 {