man3/stpcpy.3

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  25 .TH STPCPY 3  2019-03-06 "GNU" "Linux Programmer's Manual"
  26 .SH NAME
  27 stpcpy \- copy a string returning a pointer to its end
  28 .SH SYNOPSIS
  29 .nf
  30 .B #include <string.h>
  31 .PP
  32 .BI "char *stpcpy(char *" dest ", const char *" src );
  33 .fi
  34 .PP
  35 .in -4n
  36 Feature Test Macro Requirements for glibc (see
  37 .BR feature_test_macros (7)):
  38 .in
  39 .PP
  40 .BR stpcpy ():
  41 .PD 0
  42 .ad l
  43 .RS 4
  44 .TP 4
  45 Since glibc 2.10:
  46 _POSIX_C_SOURCE\ >=\ 200809L
  47 .TP
  48 Before glibc 2.10:
  49 _GNU_SOURCE
  50 .RE
  51 .ad
  52 .PD
  53 .SH DESCRIPTION
  54 The
  55 .BR stpcpy ()
  56 function copies the string pointed to by
  57 .I src
  58 (including the terminating null byte (\(aq\e0\(aq)) to the array pointed to by
  59 .IR dest .
  60 The strings may not overlap, and the destination string
  61 .I dest
  62 must be large enough to receive the copy.
  63 .SH RETURN VALUE
  64 .BR stpcpy ()
  65 returns a pointer to the
  66 .B end
  67 of the string
  68 .I dest
  69 (that is, the address of the terminating null byte)
  70 rather than the beginning.
  71 .SH ATTRIBUTES
  72 For an explanation of the terms used in this section, see
  73 .BR attributes (7).
  74 .TS
  75 allbox;
  76 lb lb lb
  77 l l l.
  78 Interface       Attribute       Value
  79 T{
  80 .BR stpcpy ()
  81 T}      Thread safety   MT-Safe
  82 .TE
  83 .SH CONFORMING TO
  84 This function was added to POSIX.1-2008.
  85 Before that, it was not part of
  86 the C or POSIX.1 standards, nor customary on UNIX systems.
  87 It first appeared at least as early as 1986,
  88 in the Lattice C AmigaDOS compiler,
  89 then in the GNU fileutils and GNU textutils in 1989,
  90 and in the GNU C library by 1992.
  91 It is also present on the BSDs.
  92 .SH BUGS
  93 This function may overrun the buffer
  94 .IR dest .
  95 .SH EXAMPLE
  96 For example, this program uses
  97 .BR stpcpy ()
  98 to concatenate
  99 .B foo
 100 and
 101 .B bar
 102 to produce
 103 .BR foobar ,
 104 which it then prints.
 105 .PP
 106 .EX
 107 #define _GNU_SOURCE
 108 #include <string.h>
 109 #include <stdio.h>
 110
 111 int
 112 main(void)
 113 {
 114     char buffer[20];
 115     char *to = buffer;
 116
 117     to = stpcpy(to, "foo");
 118     to = stpcpy(to, "bar");
 119     printf("%s\en", buffer);
 120 }
 121 .EE
 122 .SH SEE ALSO
 123 .BR bcopy (3),
 124 .BR memccpy (3),
 125 .BR memcpy (3),
 126 .BR memmove (3),
 127 .BR stpncpy (3),
 128 .BR strcpy (3),
 129 .BR string (3),
 130 .BR wcpcpy (3)