gets.3s

unix v7是最后一个广泛发布的研究型UNIX版本

.TH GETS 3S 
.SH NAME
gets, fgets \- get a string from a stream
.SH SYNOPSIS
.B #include <stdio.h>
.PP
.B char *gets(s)
.br
.B char *s;
.PP
.B char *fgets(s, n, stream)
.br
.B char *s;
.br
.SM
.B FILE
.B *stream;
.SH DESCRIPTION
.I Gets
reads a string into
.I s
from the standard input stream
.B stdin.
The string is terminated by a newline
character, which is replaced in
.I s
by a null character.
.I Gets
returns its argument.
.PP
.I Fgets
reads 
.IR n \-1
characters, or up to a newline
character, whichever comes first,
from the
.I stream
into the string
.IR s .
The last character read into
.I s
is followed by a null character.
.I Fgets
returns its first argument.
.SH "SEE ALSO"
puts(3),
getc(3), scanf(3), fread(3),
ferror(3)
.SH DIAGNOSTICS
.I Gets
and
.I fgets
return the constant pointer 
.SM
.B NULL
upon end of file or error.
.SH BUGS
.I Gets
deletes a newline,
.I fgets
keeps it,
all in the name of backward compatibility.