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| author | Chris Lattner <sabre@nondot.org> | 2005-02-13 22:46:37 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2005-02-13 22:46:37 +0000 |
| commit | 946af52687fea113a6596385bfbdb26994709a37 (patch) | |
| tree | bd1830b39bcb205b95f317f0fb1f7c21cc173051 /lib/System/Unix/Unix.h | |
| parent | 2e12c745eae4be1f0c5c5f4840c58918c11c6b1d (diff) | |
| download | llvm-946af52687fea113a6596385bfbdb26994709a37.tar.gz llvm-946af52687fea113a6596385bfbdb26994709a37.tar.bz2 llvm-946af52687fea113a6596385bfbdb26994709a37.tar.xz | |
If errno is zero strerror_r does not modify the buffer, leaving it unterminated.
This causes garbage to be printed out after error messages.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20165 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/System/Unix/Unix.h')
| -rw-r--r-- | lib/System/Unix/Unix.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/System/Unix/Unix.h b/lib/System/Unix/Unix.h index 6dc75545b6..75009d0746 100644 --- a/lib/System/Unix/Unix.h +++ b/lib/System/Unix/Unix.h @@ -68,14 +68,17 @@ inline void ThrowErrno(const std::string& prefix) { char buffer[MAXPATHLEN]; + buffer[0] = 0; #ifdef HAVE_STRERROR_R // strerror_r is thread-safe. - strerror_r(errno,buffer,MAXPATHLEN-1); + if (errno) + strerror_r(errno,buffer,MAXPATHLEN-1); #elif HAVE_STRERROR // Copy the thread un-safe result of strerror into // the buffer as fast as possible to minimize impact // of collision of strerror in multiple threads. - strncpy(buffer,strerror(errno),MAXPATHLEN-1); + if (Errno) + strncpy(buffer,strerror(errno),MAXPATHLEN-1); buffer[MAXPATHLEN-1] = 0; #else // Strange that this system doesn't even have strerror |