Gautham Banasandra created HDFS-15922:
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Summary: Use memcpy for copying non-null terminated string in
jni_helper.c
Key: HDFS-15922
URL: https://issues.apache.org/jira/browse/HDFS-15922
Project: Hadoop HDFS
Issue Type: Bug
Components: libhdfs++
Affects Versions: 3.4.0
Reporter: Gautham Banasandra
Assignee: Gautham Banasandra
We currently get a warning while compiling HDFS native client -
{code}
[WARNING] inlined from 'wildcard_expandPath' at
/home/jenkins/jenkins-home/workspace/hadoop-multibranch_PR-2792/src/hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfs/jni_helper.c:427:21,
[WARNING] /usr/include/x86_64-linux-gnu/bits/string_fortified.h:106:10:
warning: '__builtin_strncpy' output truncated before terminating nul copying as
many bytes from a string as its length [-Wstringop-truncation]
[WARNING]
/home/jenkins/jenkins-home/workspace/hadoop-multibranch_PR-2792/src/hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfs/jni_helper.c:402:43:
note: length computed here
{code}
The scenario here is such that the copied string is deliberately not null
terminated, since we want to insert a PATH_SEPARATOR ourselves. The warning
reported by strncpy is valid, but not applicable in this scenario.
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