Implement a version of the standard I/O fgets function, called tfgets, that times out and returns NULL if it does not receive an input line on standard input within 5 seconds. Your function should be implemented in a package called tfgets-proc.c using processes, signals, and nonlocal jumps. It should not use the Linux alarm function. Test your solution using the driver program in Figure 12.47.
________________________________________________________code/conc/tfgets-main.c
________________________________________________________code/conc/tfgets-main.c
Figure 12.47 Driver program for Problems 12.31-12.33.
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