Printf

Uncommon card · No. 136914

printf is a C standard library function and is also a Linux terminal (shell) command that formats text and writes it to standard output. The function accepts a format C-string argument and a variable number of value arguments that the function serializes per the format string. Mismatch between the format specifiers and count and type of values results in undefined behavior, and the program might crash or vulnerabilities may arise. The format string is encoded as a template language consisting of verbatim text and format specifiers that each specify how to serialize a value. As the format string is processed left-to-right, a subsequent value is used for each format specifier found. A format specifier starts with a % character and has one or more following characters that specify how to serialize a value. The standard library provides other, similar functions that form a family of printf-like functions. The functions share the same formatting capabilities but provide different behavior such...

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