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HADOOP-10866. RawLocalFileSystem fails to read symlink targets via the stat command when the format of the stat command uses non-curly quotes (yzhang via cmccabe) 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1612429 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Colin McCabe 2014-07-21 23:23:30 +00:00
parent 3fc91db99f
commit dc688e8d5e
3 changed files with 30 additions and 15 deletions
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4
hadoop-common-project/hadoop-common/CHANGES.txt
View File

@ -66,6 +66,10 @@ Release 2.6.0 - UNRELEASED
HADOOP-10857. Native Libraries Guide doen't mention a dependency on
openssl-development package (ozawa via cmccabe)
HADOOP-10866. RawLocalFileSystem fails to read symlink targets via the stat
command when the format of the stat command uses non-curly quotes (yzhang
via cmccabe)
Release 2.5.0 - UNRELEASED
INCOMPATIBLE CHANGES

13
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/Stat.java
View File

@ -128,6 +128,8 @@ protected void parseExecResult(BufferedReader lines) throws IOException {
" link " + original);
}
// 6,symbolic link,6,1373584236,1373584236,lrwxrwxrwx,andrew,andrew,`link' -> `target'
// OR
// 6,symbolic link,6,1373584236,1373584236,lrwxrwxrwx,andrew,andrew,'link' -> 'target'
StringTokenizer tokens = new StringTokenizer(line, ",");
try {
long length = Long.parseLong(tokens.nextToken());
@ -147,18 +149,17 @@ protected void parseExecResult(BufferedReader lines) throws IOException {
String group = tokens.nextToken();
String symStr = tokens.nextToken();
// 'notalink'
// 'link' -> `target'
// `link' -> `target' OR 'link' -> 'target'
// '' -> ''
Path symlink = null;
StringTokenizer symTokens = new StringTokenizer(symStr, "`");
symTokens.nextToken();
String parts[] = symStr.split(" -> ");
try {
String target = symTokens.nextToken();
target = target.substring(0, target.length()-1);
String target = parts[1];
target = target.substring(1, target.length()-1);
if (!target.isEmpty()) {
symlink = new Path(target);
}
} catch (NoSuchElementException e) {
} catch (ArrayIndexOutOfBoundsException e) {
// null if not a symlink
}
// Set stat

28
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestStat.java
View File

@ -47,15 +47,15 @@ private class StatOutput {
final String doesNotExist;
final String directory;
final String file;
final String symlink;
final String[] symlinks;
final String stickydir;
StatOutput(String doesNotExist, String directory, String file,
String symlink, String stickydir) {
String[] symlinks, String stickydir) {
this.doesNotExist = doesNotExist;
this.directory = directory;
this.file = file;
this.symlink = symlink;
this.symlinks = symlinks;
this.stickydir = stickydir;
}
@ -80,10 +80,12 @@ void test() throws Exception {
status = stat.getFileStatusForTesting();
assertTrue(status.isFile());
br = new BufferedReader(new StringReader(symlink));
stat.parseExecResult(br);
status = stat.getFileStatusForTesting();
assertTrue(status.isSymlink());
for (String symlink : symlinks) {
br = new BufferedReader(new StringReader(symlink));
stat.parseExecResult(br);
status = stat.getFileStatusForTesting();
assertTrue(status.isSymlink());
}
br = new BufferedReader(new StringReader(stickydir));
stat.parseExecResult(br);
@ -95,22 +97,30 @@ void test() throws Exception {
@Test(timeout=10000)
public void testStatLinux() throws Exception {
String[] symlinks = new String[] {
"6,symbolic link,1373584236,1373584236,777,andrew,andrew,`link' -> `target'",
"6,symbolic link,1373584236,1373584236,777,andrew,andrew,'link' -> 'target'"
};
StatOutput linux = new StatOutput(
"stat: cannot stat `watermelon': No such file or directory",
"4096,directory,1373584236,1373586485,755,andrew,root,`.'",
"0,regular empty file,1373584228,1373584228,644,andrew,andrew,`target'",
"6,symbolic link,1373584236,1373584236,777,andrew,andrew,`link' -> `target'",
symlinks,
"4096,directory,1374622334,1375124212,1755,andrew,andrew,`stickydir'");
linux.test();
}
@Test(timeout=10000)
public void testStatFreeBSD() throws Exception {
String[] symlinks = new String[] {
"6,Symbolic Link,1373508941,1373508941,120755,awang,awang,`link' -> `target'"
};
StatOutput freebsd = new StatOutput(
"stat: symtest/link: stat: No such file or directory",
"512,Directory,1373583695,1373583669,40755,awang,awang,`link' -> `'",
"0,Regular File,1373508937,1373508937,100644,awang,awang,`link' -> `'",
"6,Symbolic Link,1373508941,1373508941,120755,awang,awang,`link' -> `target'",
symlinks,
"512,Directory,1375139537,1375139537,41755,awang,awang,`link' -> `'");
freebsd.test();
}