des_crypt.3: Minor wording fix in VERSIONS

[thirdparty/man-pages.git] / man3 / strcpy.3

diff --git a/man3/strcpy.3 b/man3/strcpy.3
index da027c3ef420ce5a98b24616b5ca51ea51dde27f..7da5b9796958c56cf1969540c819e39c1a1f9ba4 100644 (file)
--- a/man3/strcpy.3
+++ b/man3/strcpy.3
@@ -32,15 +32,15 @@
 .\" 2007-06-15, Marc Boyer <marc.boyer@enseeiht.fr> + mtk
 .\"     Improve discussion of strncpy().
 .\"
-.TH STRCPY 3  2014-02-28 "GNU" "Linux Programmer's Manual"
+.TH STRCPY 3  2019-03-06 "GNU" "Linux Programmer's Manual"
 .SH NAME
 strcpy, strncpy \- copy a string
 .SH SYNOPSIS
 .nf
 .B #include <string.h>
-.sp
+.PP
 .BI "char *strcpy(char *" dest ", const char *" src );
-.sp
+.PP
 .BI "char *strncpy(char *" dest ", const char *" src ", size_t " n );
 .fi
 .SH DESCRIPTION
@@ -48,7 +48,7 @@ The
 .BR strcpy ()
 function copies the string pointed to by
 .IR src ,
-including the terminating null byte (\(aq\\0\(aq),
+including the terminating null byte (\(aq\e0\(aq),
 to the buffer pointed to by
 .IR dest .
 The strings may not overlap, and the destination string
@@ -88,22 +88,22 @@ bytes are written.
 A simple implementation of
 .BR strncpy ()
 might be:
+.PP
 .in +4n
-.nf
-
+.EX
 char *
 strncpy(char *dest, const char *src, size_t n)
 {
     size_t i;
 
-    for (i = 0; i < n && src[i] != \(aq\\0\(aq; i++)
+    for (i = 0; i < n && src[i] != \(aq\e0\(aq; i++)
         dest[i] = src[i];
     for ( ; i < n; i++)
-        dest[i] = \(aq\\0\(aq;
+        dest[i] = \(aq\e0\(aq;
 
     return dest;
 }
-.fi
+.EE
 .in
 .SH RETURN VALUE
 The
@@ -114,14 +114,20 @@ functions return a pointer to
 the destination string
 .IR dest .
 .SH ATTRIBUTES
-.SS Multithreading (see pthreads(7))
-The
-.BR strcpy ()
-and
+For an explanation of the terms used in this section, see
+.BR attributes (7).
+.TS
+allbox;
+lbw19 lb lb
+l l l.
+Interface      Attribute       Value
+T{
+.BR strcpy (),
 .BR strncpy ()
-functions are thread-safe.
+T}     Thread safety   MT-Safe
+.TE
 .SH CONFORMING TO
-SVr4, 4.3BSD, C89, C99.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .SH NOTES
 Some programmers consider
 .BR strncpy ()
@@ -135,16 +141,16 @@ the length of
 then
 .BR strcpy ()
 can be used.
-
+.PP
 One valid (and intended) use of
 .BR strncpy ()
 is to copy a C string to a fixed-length buffer
 while ensuring both that the buffer is not overflowed
-and that unused bytes in the target buffer are zeroed out
+and that unused bytes in the destination buffer are zeroed out
 (perhaps to prevent information leaks if the buffer is to be
 written to media or transmitted to another process via an
 interprocess communication technique).
-
+.PP
 If there is no terminating null byte in the first
 .I n
 bytes of
@@ -152,26 +158,33 @@ bytes of
 .BR strncpy ()
 produces an unterminated string in
 .IR dest .
-You can force termination using something like the following:
+If
+.I buf
+has length
+.IR buflen ,
+you can force termination using something like the following:
+.PP
 .in +4n
-.nf
-
-strncpy(buf, str, n);
-if (n > 0)
-    buf[n \- 1]= \(aq\\0\(aq;
-.fi
+.EX
+if (buflen > 0) {
+    strncpy(buf, str, buflen \- 1);
+    buf[buflen \- 1]= \(aq\e0\(aq;
+}
+.EE
 .in
 .PP
-(Of course, the above technique ignores the fact that
-information contained in
+(Of course, the above technique ignores the fact that, if
 .I src
-is lost in the copying to
+contains more than
+.I "buflen\ \-\ 1"
+bytes, information is lost in the copying to
 .IR dest .)
-
+.\"
+.SS strlcpy()
 Some systems (the BSDs, Solaris, and others) provide the following function:
-
+.PP
     size_t strlcpy(char *dest, const char *src, size_t size);
-
+.PP
 .\" http://static.usenix.org/event/usenix99/full_papers/millert/millert_html/index.html
 .\"     "strlcpy and strlcat - consistent, safe, string copy and concatenation"
 .\"     1999 USENIX Annual Technical Conference
@@ -182,7 +195,7 @@ but it copies at most
 bytes to
 .IR dest ,
 always adds a terminating null byte,
-and does not pad the target with (further) null bytes.
+and does not pad the destination with (further) null bytes.
 This function fixes some of the problems of
 .BR strcpy ()
 and