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https://github.com/SEPPDROID/Digital-Research-Source-Code.git
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54 lines
2.1 KiB
C
54 lines
2.1 KiB
C
/****************************************************************************/
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/* */
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/* C l o s e F u n c t i o n */
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/* --------------------------- */
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/* */
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/* The close function is used to terminate access to a file / device. */
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/* */
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/* Calling Sequence: */
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/* */
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/* ret = close(fd); */
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/* */
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/* Where "fd" is an open file descriptor to be CLOSEd. */
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/* */
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/****************************************************************************/
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#include "stdio.h"
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#include "cpm.h"
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/****************************/
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EXTERN BYTE __xeof; /* End of file for ASCII */
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WORD close(fd) /****************************/
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/* */
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WORD fd; /* File descriptor to close */
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/* */
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{ /****************************/
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EXTERN LONG _chkc(); /* fd -> fp conversion */
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REG FILE *fp; /* file pointer Temporary */
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/* */
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if((LONG)(fp=_chkc(fd)) == FAILURE) /* File Open? */
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return(FAILURE); /* no, quit */
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/* */
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if ((fp->flags & (ISTTY|ISLPT)) != 0) /* Character device? */
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{ /* */
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__chinit(fd); /* Clean the channel again */
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freec(fd); /* Release the channel */
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return(SUCCESS); /* All done */
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} /****************************/
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/* */
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if((fp->flags & ISASCII) != 0 && /* ASCII file? */
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(fp->flags & ISREAD) == 0) /* and not read-only */
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{ /* */
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lseek(fd,0L,2); /* Seek to EOF */
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write(fd,&__xeof,1); /* Write a ^Z character */
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} /****************************/
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if((fp->flags & DIRTY) != 0) /* Buffer dirty? */
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{ /* */
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if(_blkio(fp,fp->sector,fp->buffer, /* Write out */
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1L,B_WRITE) != 1) /* buffer */
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return(FAILURE); /* can't */
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} /****************************/
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__BDOS(CLOSE,&(fp->fcb)); /* Close the fcb */
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__chinit(fd); /* Release the space */
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freec(fd); /* Release the channel */
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return(SUCCESS); /* Done */
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} /****************************/
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