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If a malicious application places a named pipe (FIFO) in a log directory do not hang while opening it. Open the file in non blocking mode, and after checking it's a regular file drop the flag for portability. Also specify the flag O_NOCTTY, since no log file should ever become the process's controlling terminal.
| EOF | ||
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| grep "test_fifo.log.1 (read-only) for compression: Operation not supported" error.log >/dev/null | ||
| if [ $? != 0 ]; then |
Check warning
Code scanning / shellcheck
Check exit code directly with e.g. 'if ! mycmd;', not indirectly with $?.
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If a malicious application places a named pipe (FIFO) in a log directory do not hang while opening it.
Open the file in non blocking mode, and after checking it's a regular file drop the flag for portability.
Also specify the flag O_NOCTTY, since no log file should ever become the process's controlling terminal.