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/* Copyright Abandoned 1996 TCX DataKonsult AB & Monty Program KB & Detron HB
This file is public domain and comes with NO WARRANTY of any kind */
#include "mysys_priv.h"
#include "my_static.h"
#include <errno.h>
#include "mysys_err.h"
static void make_ftype(my_string to,int flag);
/* Open a file as stream */
FILE *my_fopen(const char *FileName, int Flags, myf MyFlags)
/* Path-name of file */
/* Read | write .. */
/* Special flags */
{
FILE *fd;
char type[5];
DBUG_ENTER("my_fopen");
DBUG_PRINT("my",("Name: '%s' Flags: %d MyFlags: %d",
FileName, Flags, MyFlags));
make_ftype(type,Flags);
if ((fd = fopen(FileName, type)) != 0)
{
/*
The test works if MY_NFILE < 128. The problem is that fileno() is char
on some OS (SUNOS). Actually the filename save isn't that important
so we can ignore if this doesn't work.
*/
if ((uint) fileno(fd) >= MY_NFILE)
{
thread_safe_increment(my_stream_opened,&THR_LOCK_open);
DBUG_RETURN(fd); /* safeguard */
}
pthread_mutex_lock(&THR_LOCK_open);
if ((my_file_info[fileno(fd)].name = (char*)
my_strdup(FileName,MyFlags)))
{
my_stream_opened++;
my_file_info[fileno(fd)].type = STREAM_BY_FOPEN;
pthread_mutex_unlock(&THR_LOCK_open);
DBUG_PRINT("exit",("stream: %lx",fd));
DBUG_RETURN(fd);
}
pthread_mutex_unlock(&THR_LOCK_open);
(void) my_fclose(fd,MyFlags);
my_errno=ENOMEM;
}
else
my_errno=errno;
DBUG_PRINT("error",("Got error %d on open",my_errno));
if (MyFlags & (MY_FFNF | MY_FAE | MY_WME))
my_error((Flags & O_RDONLY) || (Flags == O_RDONLY ) ? EE_FILENOTFOUND :
EE_CANTCREATEFILE,
MYF(ME_BELL+ME_WAITTANG), FileName,my_errno);
DBUG_RETURN((FILE*) 0);
} /* my_fopen */
/* Close a stream */
int my_fclose(FILE *fd, myf MyFlags)
{
int err,file;
DBUG_ENTER("my_fclose");
DBUG_PRINT("my",("stream: %lx MyFlags: %d",fd, MyFlags));
pthread_mutex_lock(&THR_LOCK_open);
file=fileno(fd);
if ((err = fclose(fd)) < 0)
{
my_errno=errno;
if (MyFlags & (MY_FAE | MY_WME))
my_error(EE_BADCLOSE, MYF(ME_BELL+ME_WAITTANG),
my_filename(file),errno);
}
else
my_stream_opened--;
if ((uint) file < MY_NFILE && my_file_info[file].type != UNOPEN)
{
my_file_info[file].type = UNOPEN;
my_free(my_file_info[file].name, MYF(MY_ALLOW_ZERO_PTR));
}
pthread_mutex_unlock(&THR_LOCK_open);
DBUG_RETURN(err);
} /* my_fclose */
/* Make a stream out of a file handle */
/* Name may be 0 */
FILE *my_fdopen(File Filedes, const char *name, int Flags, myf MyFlags)
{
FILE *fd;
char type[5];
DBUG_ENTER("my_fdopen");
DBUG_PRINT("my",("Fd: %d Flags: %d MyFlags: %d",
Filedes, Flags, MyFlags));
make_ftype(type,Flags);
if ((fd = fdopen(Filedes, type)) == 0)
{
my_errno=errno;
if (MyFlags & (MY_FAE | MY_WME))
my_error(EE_CANT_OPEN_STREAM, MYF(ME_BELL+ME_WAITTANG),errno);
}
else
{
pthread_mutex_lock(&THR_LOCK_open);
my_stream_opened++;
if (Filedes < MY_NFILE)
{
if (my_file_info[Filedes].type != UNOPEN)
{
my_file_opened--; /* File is opened with my_open ! */
}
else
{
my_file_info[Filedes].name= my_strdup(name,MyFlags);
}
my_file_info[Filedes].type = STREAM_BY_FDOPEN;
}
pthread_mutex_unlock(&THR_LOCK_open);
}
DBUG_PRINT("exit",("stream: %lx",fd));
DBUG_RETURN(fd);
} /* my_fdopen */
/* Make a filehandler-open-typestring from ordinary inputflags */
static void make_ftype(register my_string to, register int flag)
{
#if FILE_BINARY /* If we have binary-files */
reg3 int org_flag=flag;
#endif
flag&= ~FILE_BINARY; /* remove binary bit */
if (flag == O_RDONLY)
*to++= 'r';
else if (flag == O_WRONLY)
*to++= 'w';
else
{ /* Add '+' after theese */
if (flag == O_RDWR)
*to++= 'r';
else if (flag & O_APPEND)
*to++= 'a';
else
*to++= 'w'; /* Create file */
*to++= '+';
}
#if FILE_BINARY /* If we have binary-files */
if (org_flag & FILE_BINARY)
*to++='b';
#endif
*to='\0';
} /* make_ftype */
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