MTS_IO_Lockfile.cpp: check lock file write result

1 files changed, 15 insertions, 3 deletions

diff --git a/src/MTS_IO_LockFile.cpp b/src/MTS_IO_LockFile.cpp
index c013699..a4879de 100644
--- a/src/MTS_IO_LockFile.cpp
+++ b/src/MTS_IO_LockFile.cpp
@@ -84,10 +84,22 @@ bool LockFile::lock(uint32_t attemptMillis) {
             // Mgetty treats 4-bytes lock files as binary,
             // not text, PID. Making 5+ char file. Brrr...
             char buf[256] = {0};
+            size_t written = 0;
+
             sprintf(buf, "%4d\n", getpid());
-            write(m_iLockFd, buf, strlen(buf));
-            close(m_iLockFd);
-            return true;
+            size_t wsize = strlen(buf);
+
+            written = write(m_iLockFd, buf, wsize);
+
+            if (wsize != written) {
+                printError("LockFile| Error writing to lock file [%s] [%d][%s]", m_sFile.c_str(), errno, strerror(errno));
+                close(m_iLockFd);
+                return false;
+            }
+            else {
+                close(m_iLockFd);
+                return true;
+            }
         }
         uint32_t randomSleepTime = ((rand() % 10) + 1) * 100000; //Sleep from 100ms to 1 Second
         ::usleep(randomSleepTime);