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A C program may also use the exit() function specifying the integer status or exit macro as the first parameter. The return value from main is passed to the exit function, which for values zero, EXIT_SUCCESS or EXIT_FAILURE may translate it to "an implementation defined form" of successful termination or unsuccessful termination. [citation needed]
The program, when installed, prompts the user to create a whitelist of devices that are allowed to connect to the computer via its USB ports, which it checks at an adjustable sample rate. The user may also choose what actions the computer will take if it detects a USB device not on the whitelist (by default, it shuts down and erases data from ...
Termcap ("terminal capability") is a legacy software library and database used on Unix-like computers that enables programs to use display computer terminals in a device-independent manner, which greatly simplifies the process of writing portable text mode applications.
In Linux, if the script was executed by a regular user, the shell would attempt to execute the command rm -rf / as a regular user, and the command would fail. However, if the script was executed by the root user, then the command would likely succeed and the filesystem would be erased.
"GOTO" key on the 1982 ZX Spectrum home computer, implemented with native BASIC (one-key command entry).. Goto is a statement found in many computer programming languages.It performs a one-way transfer of control to another line of code; in contrast a function call normally returns control.
Another past use was to kill a frozen graphical program, as the X Window System used to have complete control over the graphical mode and input devices. On distributions that do not include a textmode command, [ clarification needed ] the key sequence Ctrl + Alt + F1 may be able to force a switch to a text console.
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In the C standard library, the character reading functions such as getchar return a value equal to the symbolic value (macro) EOF to indicate that an end-of-file condition has occurred. The actual value of EOF is implementation-dependent and must be negative (but is commonly −1, such as in glibc [ 2 ] ).