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strcat.3p (2561B)

    

  1. '\" et
  2. .TH STRCAT "3P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual"
  3. .\"
  4. .SH PROLOG
  5. This manual page is part of the POSIX Programmer's Manual.
  6. The Linux implementation of this interface may differ (consult
  7. the corresponding Linux manual page for details of Linux behavior),
  8. or the interface may not be implemented on Linux.
  9. .\"
  10. .SH NAME
  11. strcat
  12. \(em concatenate two strings
  13. .SH SYNOPSIS
  14. .LP
  15. .nf
  16. #include <string.h>
  17. .P
  18. char *strcat(char *restrict \fIs1\fP, const char *restrict \fIs2\fP);
  19. .fi
  20. .SH DESCRIPTION
  21. The functionality described on this reference page is aligned with the
  22. ISO\ C standard. Any conflict between the requirements described here and the
  23. ISO\ C standard is unintentional. This volume of POSIX.1\(hy2017 defers to the ISO\ C standard.
  24. .P
  25. The
  26. \fIstrcat\fR()
  27. function shall append a copy of the string pointed to by
  28. .IR s2
  29. (including the terminating NUL character) to the end of the string pointed
  30. to by
  31. .IR s1 .
  32. The initial byte of
  33. .IR s2
  34. overwrites the NUL character at the end of
  35. .IR s1 .
  36. If copying takes place between objects that overlap, the behavior is
  37. undefined.
  38. .SH "RETURN VALUE"
  39. The
  40. \fIstrcat\fR()
  41. function shall return
  42. .IR s1 ;
  43. no return value is reserved to indicate an error.
  44. .SH ERRORS
  45. No errors are defined.
  46. .LP
  47. .IR "The following sections are informative."
  48. .SH EXAMPLES
  49. None.
  50. .SH "APPLICATION USAGE"
  51. This version is aligned with the ISO\ C standard; this does not affect
  52. compatibility with XPG3 applications. Reliable error detection by this
  53. function was never guaranteed.
  54. .SH RATIONALE
  55. None.
  56. .SH "FUTURE DIRECTIONS"
  57. None.
  58. .SH "SEE ALSO"
  59. .IR "\fIstrncat\fR\^(\|)"
  60. .P
  61. The Base Definitions volume of POSIX.1\(hy2017,
  62. .IR "\fB<string.h>\fP"
  63. .\"
  64. .SH COPYRIGHT
  65. Portions of this text are reprinted and reproduced in electronic form
  66. from IEEE Std 1003.1-2017, Standard for Information Technology
  67. -- Portable Operating System Interface (POSIX), The Open Group Base
  68. Specifications Issue 7, 2018 Edition,
  69. Copyright (C) 2018 by the Institute of
  70. Electrical and Electronics Engineers, Inc and The Open Group.
  71. In the event of any discrepancy between this version and the original IEEE and
  72. The Open Group Standard, the original IEEE and The Open Group Standard
  73. is the referee document. The original Standard can be obtained online at
  74. http://www.opengroup.org/unix/online.html .
  75. .PP
  76. Any typographical or formatting errors that appear
  77. in this page are most likely
  78. to have been introduced during the conversion of the source files to
  79. man page format. To report such errors, see
  80. https://www.kernel.org/doc/man-pages/reporting_bugs.html .