Defined in header <stdio.h> | ||
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char *gets( char *str ); | (removed in C11) | |
char *gets_s( char *str, rsize_t n ); | (since C11) (optional) |
stdin into the character array pointed to by str until a newline character is found or end-of-file occurs. A null character is written immediately after the last character read into the array. The newline character is discarded but not stored in the buffer.stdin until a newline is found or end-of-file occurs. Writes only at most n-1 characters into the array pointed to by str, and always writes the terminating null character (unless str is a null pointer). The newline character, if found, is discarded and does not count toward the number of characters written to the buffer. n is zero n is greater than RSIZE_MAX str is a null pointer n-1 characters to the buffer. gets_s first finishes reading and discarding the characters from stdin until new-line character, end-of-file condition, or read error before calling the constraint handler. gets_s is only guaranteed to be available if __STDC_LIB_EXT1__ is defined by the implementation and if the user defines __STDC_WANT_LIB_EXT1__ to the integer constant 1 before including stdio.h.| str | - | character string to be written |
str on success, NULL on failure.
If the failure has been caused by end of file condition, additionally sets the eof indicator (see feof()) on stdin. If the failure has been caused by some other error, sets the error indicator (see ferror()) on stdin.
The gets() function does not perform bounds checking, therefore this function is extremely vulnerable to buffer-overflow attacks. It cannot be used safely (unless the program runs in an environment which restricts what can appear on stdin). For this reason, the function has been deprecated in the third corrigendum to the C99 standard and removed altogether in the C11 standard. fgets() and gets_s() are the recommended replacements.
Never use gets().
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(C11)(C11)(C11) | reads formatted input from stdin, a file stream or a buffer (function) |
| gets a character string from a file stream (function) |
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| writes a character string to a file stream (function) |
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(dynamic memory TR) | read from a stream into a automatically resized buffer until delimiter/end of line (function) |
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