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LQ Newbie
Registered: Aug 2014
Posts: 28
Rep: 
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"symlink" is undefined
Hi,
I am trying to create a symbolic link using the function symlink(char*, char*) in C++.
I am including the header file - unistd.h in my c++ file.
The command I used to create sym link - symlink(infilename,outfileName)
The unistd.h file is under the path /usr/include
Whenevr I try to compile the code, I am getting the compilation error - symlink is undefined.
line 878: error(114):identifier "symlink" is undefined
1 error detected in the compilation of "SendBorg.cpp".
c89: /usr/cmplr/ccombe exited, returning 2.
Please help me resolving the above compiler error.
Providing the additional details below.
Details -
Compiler - C89
OS - Tandem OS
Note: I did grep for symlink function in /usr/include. I am able to find the symlink function declaration only in unistd.h and I didn't come across the function definition anywhere.
I am not able to attach the header file. So including the content here.
#ifdef __TANDEM
#pragma columns 80
#if _TANDEM_ARCH_ != 0
#pragma ONCE
#endif
#endif
#ifndef _UNISTD
#define _UNISTD
/* T8645H02 - (13MAY2009) - unistd.h various kernel and FS definitions */
/* T8645G08^AAX - (10MAY2007) */
/*
* Copyright 2009 Hewlett Packard Development Company, L.P.
*
* ALL RIGHTS RESERVED
*/
#if (_TANDEM_ARCH_ == 1 && __G_Series_RVU < 629 || \
_TANDEM_ARCH_ == 2 && __H_Series_RVU < 606) && \
(_FILE_OFFSET_BITS == 64 || _LARGEFILE64_SOURCE == 1)
#error 64-bit functions not available for target RVU
#endif /* 64-bit functions requested when not available */
#ifdef __cplusplus
extern "C" {
#endif
#ifdef __OLDCALLS /* TNS C legacy header */
#pragma nooldcalls
#define REVERT_TO_OLDCALLS
#endif
/*
* COPYRIGHT NOTICE
*
* Copyright (c) 1990, 1991, 1992, 1993 Open Software Foundation, Inc.
* ALL RIGHTS RESERVED (OSF/1). See /usr/include/COPYRIGHT.OSF1 .
*/
/* OSF/1 1.3 (Revision 3.0.5.10) */
/*
* (C) COPYRIGHT International Business Machines Corp. 1985, 1989
* All Rights Reserved
* Licensed Materials - Property of IBM
*
* US Government Users Restricted Rights - Use, duplication or
* disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
*/
/*
* Copyright (c) 1984 AT&T
* All Rights Reserved
*
* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T
* The copyright notice above does not evidence any
* actual or intended publication of such source code.
*/
#ifndef _GUARDIAN_HOST
#include <sys/types.h>
#else
#include <systype.h> nolist
#endif /* _GUARDIAN_HOST */
#ifndef NULL
#if defined(_GUARDIAN_TARGET) && defined(__XMEM)
#define NULL 0L
#else
#define NULL 0
#endif
#endif /* NULL */
/*
* Defines for access()
*/
#define R_OK 4 /* Test for read access */
#define W_OK 2 /* Test for write access */
#define X_OK 1 /* Test for execute access */
#define F_OK 0 /* Test for existence of the file */
/*
* Defines for lseek()
*/
#ifndef SEEK_SET
#define SEEK_SET 0 /* Set file pointer to "offset" */
#endif
#ifndef SEEK_CUR
#define SEEK_CUR 1 /* Set file pointer to current + "offset" */
#endif
#ifndef SEEK_END
#define SEEK_END 2 /* Set file pointer to EOF + "offset" */
#endif
/*
* File descriptors for stdin, stdout, and stderr
*/
#define STDIN_FILENO 0
#define STDOUT_FILENO 1
#define STDERR_FILENO 2
/*
* Compile-time symbolic constants -- can be interrogated by sysconf()
*/
#define _POSIX_JOB_CONTROL 1 /* Implementation supports job control */
#define _POSIX_SAVED_IDS 1 /* Each process has a saved set-user-ID */
/* and saved set-group-ID */
#define _POSIX_VERSION 199009L /* POSIX Standard version */
#if defined(_XOPEN_SOURCE) || _POSIX_C_SOURCE == 2
/* All of the following are POSIX.2 additions to POSIX.1 */
#define _POSIX2_C_BIND 1 /* Supports the C language bindings */
#define _POSIX2_C_DEV 1 /* Supports the C development utilities */
#undef _POSIX2_FORT_DEV /* No support for fortran dev utilities */
#undef _POSIX2_FORT_RUN /* No support for fortran runtime utilities */
#undef _POSIX2_LOCALEDEF /* No support for the creation of locales */
#define _POSIX2_SW_DEV 1 /* Supports software development utilities */
#undef _POSIX2_CHAR_TERM /* Supports at least one terminal type */
#undef _POSIX2_UPE /* Supports the User Portability Utilities */
#define _POSIX2_C_VERSION 199209L /* Supports ISO POSIX-2 DIS Version 1 */
#define _POSIX2_VERSION 199209L /* POSIX.2 Standard */
#endif /* _XOPEN_SOURCE || _POSIX_C_SOURCE == 2 */
#ifdef _XOPEN_SOURCE
#undef _XOPEN_XCU_VERSION
/* Turn the line above off and the following line on when XPG4 fully supported
#define _XOPEN_XCU_VERSION 4
*/
#define _XOPEN_ENH_I18N 1 /* Supports enhanced I18N */
#define _XOPEN_SHM 1 /* Supports shared memory */
#endif /* _XOPEN_SOURCE */
/*
* Execution-time symbolic constants
* (can be interrogated using pathconf() and fpathconf())
*/
/*
* chown() function is restricted
*/
#define _POSIX_CHOWN_RESTRICTED 1 /* Applies to all files */
/*
* Path components greater than NAME_MAX are never truncated
*/
#define _POSIX_NO_TRUNC 1
/*
* Value to use for disabling special character functions
*/
#define _POSIX_VDISABLE 0xFF
/*
* Defines for sysconf() options
*/
#define _SC_ARG_MAX 1
#define _SC_CHILD_MAX 2
#define _SC_CLK_TCK 3
#define _SC_JOB_CONTROL 4
#define _SC_NGROUPS_MAX 5
#define _SC_OPEN_MAX 6
#define _SC_SAVED_IDS 7
#define _SC_STREAM_MAX 8
#define _SC_TZNAME_MAX 9
#define _SC_VERSION 10
#if defined(_XOPEN_SOURCE) || _POSIX_C_SOURCE == 2
#define _SC_BC_BASE_MAX 15
#define _SC_BC_DIM_MAX 16
#define _SC_BC_SCALE_MAX 17
#define _SC_BC_STRING_MAX 18
#define _SC_COLL_WEIGHTS_MAX 20
#define _SC_EXPR_NEST_MAX 21
#define _SC_LINE_MAX 22
#define _SC_2_C_DEV 23
#define _SC_2_FORT_DEV 24
#define _SC_2_FORT_RUN 25
#define _SC_2_LOCALEDEF 26
#define _SC_2_SW_DEV 27
#define _SC_2_VERSION 28
#define _SC_RE_DUP_MAX 29
#define _SC_2_C_BIND 30
#define _SC_2_UPE 31
#define _SC_XOPEN_VERSION 32
#define _SC_XOPEN_CRYPT 33
#define _SC_XOPEN_ENH_I18N 34
#define _SC_XOPEN_SHM 35
#define _SC_2_CHAR_TERM 36
#define _SC_PASS_MAX 37
#define _SC_XOPEN_XCU_VERSION 38
#define _SC_2_C_VERSION 39
#endif /* _XOPEN_SOURCE || _POSIX_C_SOURCE == 2 */
#if _XOPEN_SOURCE_EXTENDED == 1
#define _SC_IOV_MAX 42
#endif
/*
* Defines for pathconf() options
*/
#define _PC_CHOWN_RESTRICTED 1
#define _PC_LINK_MAX 2
#define _PC_MAX_CANON 3
#define _PC_MAX_INPUT 4
#define _PC_NAME_MAX 5
#define _PC_NO_TRUNC 6
#define _PC_PATH_MAX 7
#define _PC_PIPE_BUF 8
#define _PC_VDISABLE 9
/* Arguments for the confstr() function */
#define _CS_PATH 1
#if _TANDEM_ARCH_ != 0 || !defined(_GUARDIAN_TARGET)
int close (int);
off_t lseek (int, off_t, int);
#if _LARGEFILE64_SOURCE == 1 && _TANDEM_ARCH_ != 0
off64_t lseek64 (int, off64_t, int);
#endif
ssize_t read (int, void *,size_t);
int unlink(const char *);
ssize_t write (int, const void *, size_t);
#if _FILE_OFFSET_BITS == 64 && _TANDEM_ARCH_ != 0 && \
!defined(SPT_THREAD_AWARE_PRAGMA_XNONBLOCK)
#pragma function lseek (alias("lseek64"), unspecified)
#endif
#if defined(_TANDEM_SOURCE) && _TANDEM_ARCH_ == 0 && defined(__INT32)
int unlink_guardian(const char *);
int unlink_oss (const char *);
#endif
#if defined(__TANDEM) && _TANDEM_ARCH_ == 0
#pragma function close (alias("PXFS_FILE_CLOSE_") , tal)
#pragma function lseek (alias("PXFS_FILE_LSEEK_") , tal)
#pragma function read (alias("PXFS_FILE_READ_") , tal)
#pragma function unlink (alias("PXFS_FILE_UNLINK_") , tal)
#pragma function write (alias("PXFS_FILE_WRITE_") , tal)
#if defined(_TANDEM_SOURCE) && defined(__INT32)
#pragma function unlink_guardian (alias("C_REMOVE_32_") , tal)
#pragma function unlink_oss (alias("PXFS_FILE_UNLINK_") , tal)
#endif /* _TANDEM_SOURCE && __INT32 */
#endif /* __TANDEM && _TANDEM_ARCH_ == 0 */
#endif /* _TANDEM_ARCH_ != 0 || !_GUARDIAN_TARGET */
void _exit (int);
int access(const char *, int);
unsigned int alarm (unsigned int);
int chdir (const char *);
int chown (const char *, uid_t, gid_t);
char * ctermid (char *);
/* -- cuserid() defined in stdio.h -- */
int dup (int);
int dup2 (int, int);
int execl (const char *, const char *, ...);
int execle(const char *, const char *, ...);
int execlp(const char *, const char *, ...);
int execv (const char *, char * const [] );
int execve(const char *, char * const [], char *const[]);
int execvp(const char *, char * const [] );
#if _TANDEM_ARCH_ == 1 && __G_Series_RVU >= 628 || \
_TANDEM_ARCH_ == 2 && __H_Series_RVU >= 605
int fchown (int, uid_t, gid_t);
#endif
pid_t fork (void);
long fpathconf (int, int);
char * getcwd (char *, size_t);
gid_t getegid (void);
uid_t geteuid (void);
gid_t getgid (void);
int getgroups (int, gid_t[]);
char * getlogin (void);
pid_t getpgid(pid_t);
pid_t getpgrp (void);
pid_t getpid (void);
pid_t getppid (void);
#if _TANDEM_ARCH_ == 1 && __G_Series_RVU >= 629 || \
_TANDEM_ARCH_ == 2 && __H_Series_RVU >= 607
pid_t getsid (pid_t);
#endif
uid_t getuid (void);
#if _TANDEM_ARCH_ == 2 && __H_Series_RVU >= 618
int initgroups (const char *, gid_t);
#endif
int isatty (int);
#if _TANDEM_ARCH_ == 1 && __G_Series_RVU >= 628 || \
_TANDEM_ARCH_ == 2 && __H_Series_RVU >= 605
int lchown (const char *, uid_t, gid_t);
#endif
int link (const char *,const char *);
long pathconf (const char *, int);
int pause (void);
int pipe (int [2]);
int rmdir (const char *);
#if _TANDEM_ARCH_ == 2 && __H_Series_RVU >= 618
int setegid (gid_t);
int seteuid (uid_t);
int setgroups (int, const gid_t *);
#endif
int setgid (gid_t);
int setpgid (pid_t, pid_t);
#if _TANDEM_ARCH_ == 1 && __G_Series_RVU >= 629 || \
_TANDEM_ARCH_ == 2 && __H_Series_RVU >= 607
pid_t setpgrp (void);
#endif
#if _TANDEM_ARCH_ == 1 && __G_Series_RVU >= 627 || \
_TANDEM_ARCH_ == 2 && __H_Series_RVU >= 605
int setregid (gid_t, gid_t);
int setreuid (uid_t, uid_t);
#endif /* __G_Series_RVU >= 627 || __H_Series_RVU >= 605 */
pid_t setsid (void);
int setuid (uid_t);
unsigned int sleep (unsigned int);
long sysconf (int);
pid_t tcgetpgrp (int);
int tcsetpgrp (int, pid_t);
char * ttyname (int);
#if defined(_XOPEN_SOURCE) || _POSIX_C_SOURCE == 2
size_t confstr(int, char *, size_t);
int getopt (int, char * const [], const char *);
#ifndef _LIBSPACE
/* getopt() declarations */
extern char *optarg;
extern int optind;
extern int optopt;
extern int opterr;
#if defined(__TANDEM) && _TANDEM_ARCH_ != 0
#pragma extern_data no_gp optarg optind optopt opterr
#endif
#endif /* !_LIBSPACE */
#if _TANDEM_ARCH_ != 0 || !defined(__TANDEM)
char *crypt (const char *, const char *);
void encrypt(char [64], int);
int nice (int);
void setkey (const char *);
#endif
#endif /* _XOPEN_SOURCE || _POSIX_C_SOURCE == 2 */
#ifdef _XOPEN_SOURCE
int chroot (const char *);
int fsync (int);
#if _TANDEM_ARCH_ != 0 || !defined(__TANDEM)
char *getpass(const char *);
#endif
void swab (const void *, void *, ssize_t);
#endif /* _XOPEN_SOURCE */
#if _XOPEN_SOURCE_EXTENDED == 1
#if _TANDEM_ARCH_ != 0
int ftruncate(int, off_t);
#if _LARGEFILE64_SOURCE == 1
int ftruncate64(int, off64_t);
#endif
int getdtablesize(void);
int getpagesize(void);
char *getwd(char *);
#endif /* _TANDEM_ARCH_ != 0 */
int readlink(const char *, char *, size_t);
int symlink (const char *, const char *);
#if _FILE_OFFSET_BITS == 64 && _TANDEM_ARCH_ != 0 && \
!defined(SPT_THREAD_AWARE_PRAGMA_XNONBLOCK)
#pragma function ftruncate (alias("ftruncate64"), unspecified)
#endif
#endif /* _XOPEN_SOURCE_EXTENDED == 1 */
#ifdef __TANDEM
#pragma function access (unspecified)
#pragma function isatty (unspecified)
#pragma function fork (unspecified)
#pragma function _exit (unspecified)
#if _TANDEM_ARCH_ != 0
#pragma function getpid (unspecified)
#endif /* _TANDEM_ARCH_ != 0 */
#if _TANDEM_ARCH_ == 0
#pragma function alarm (unspecified)
#pragma function getpgrp (unspecified)
#pragma function getppid (unspecified)
#pragma function setpgid (unspecified)
#pragma function setsid (unspecified)
#endif /* _TANDEM_ARCH_ == 0 */
#endif /* __TANDEM */
#ifdef REVERT_TO_OLDCALLS
#undef REVERT_TO_OLDCALLS
#pragma oldcalls
#endif
#ifdef __cplusplus
}
#endif
#endif /* _UNISTD defined */
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