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Sprite 1984 - 1993
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Sprite 1984 - 1993.iso
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unixSyscall
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readlink.c,v
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1991-12-10
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169 lines
head 1.4;
branch ;
access ;
symbols sprited:1.4.1;
locks ; strict;
comment @ * @;
1.4
date 90.03.23.10.29.33; author douglis; state Exp;
branches 1.4.1.1;
next 1.3;
1.3
date 88.11.11.16.56.04; author brent; state Exp;
branches ;
next 1.2;
1.2
date 88.06.26.17.30.22; author mendel; state Exp;
branches ;
next 1.1;
1.1
date 88.06.19.14.31.52; author ouster; state Exp;
branches ;
next ;
1.4.1.1
date 91.12.10.15.57.32; author kupfer; state Exp;
branches ;
next ;
desc
@@
1.4
log
@just added comment about how check for null char can go away once kernel fix
propagates.
@
text
@/*
* readlink.c --
*
* Procedure to map from Unix readlink system call to Sprite.
*
* Copyright (C) 1986 Regents of the University of California
* All rights reserved.
*/
#ifndef lint
static char rcsid[] = "$Header: /sprite/src/lib/c/unixSyscall/RCS/readlink.c,v 1.3 88/11/11 16:56:04 brent Exp Locker: douglis $ SPRITE (Berkeley)";
#endif not lint
#include "sprite.h"
#include "fs.h"
#include "compatInt.h"
/*
*----------------------------------------------------------------------
*
* readlink --
*
* Procedure to map from Unix readlink system call to Sprite Fs_ReadLink.
*
* Results:
* UNIX_ERROR is returned upon error, with the actual error code
* stored in errno. Upon success, the number of bytes actually
* read (ie. the length of the link's target pathname) is returned.
*
*
* Side effects:
* The buffer is filled with the number of bytes indicated by
* the length parameter.
*
*----------------------------------------------------------------------
*/
int
readlink(link, buffer, numBytes)
char *link; /* name of link file to read */
char *buffer; /* pointer to buffer area */
int numBytes; /* number of bytes to read */
{
ReturnStatus status; /* result returned by Fs_Read */
int amountRead; /* place to hold number of bytes read */
status = Fs_ReadLink(link, numBytes, buffer, &amountRead);
if (status != SUCCESS) {
errno = Compat_MapCode(status);
return(UNIX_ERROR);
} else {
/*
* Sprite's Fs_ReadLink includes the terminating null character
* in the character count return (amountRead) while Unix doesn't.
*
* ** NOTE ** this check can go away once all hosts are running
* kernels that fix this before returning the value.
*/
if (buffer[amountRead-1] == '\0') {
amountRead--;
}
return(amountRead);
}
}
@
1.4.1.1
log
@Initial branch for Sprite server.
@
text
@d11 1
a11 1
static char rcsid[] = "$Header: /sprite/src/lib/c/unixSyscall/RCS/readlink.c,v 1.4 90/03/23 10:29:33 douglis Exp $ SPRITE (Berkeley)";
@
1.3
log
@Fixed this to understand both null-terminated Sprite links
and Unix-style unterminated symbolic links
@
text
@d11 1
a11 1
static char rcsid[] = "$Header: readlink.c,v 1.2 88/06/26 17:30:22 mendel Exp $ SPRITE (Berkeley)";
d55 4
a58 1
* in the character count return (amountRead) while Unix doesn't.
d63 1
@
1.2
log
@Corrected readlink to return the length of the link rather than the
length of the link and terminating null character.
@
text
@d11 1
a11 1
static char rcsid[] = "$Header: readlink.c,v 1.1 88/06/19 14:31:52 ouster Exp $ SPRITE (Berkeley)";
d57 4
a60 1
return(amountRead-1);
@
1.1
log
@Initial revision
@
text
@d11 1
a11 1
static char rcsid[] = "$Header: readlink.c,v 1.1 87/04/26 12:41:04 brent Exp $ SPRITE (Berkeley)";
d30 1
d53 5
a57 1
return(amountRead);
@