81 lines
3.4 KiB
C
81 lines
3.4 KiB
C
|
/*
|
||
|
|
* Shell file I/O routines
|
||
|
|
*/
|
||
|
|
/* $Id: shf.h,v 1.1.1.1 1996/09/21 23:35:15 jtc Exp $ */
|
||
|
|
|
||
|
|
#define SHF_BSIZE 512
|
||
|
|
|
||
|
|
#define shf_fileno(shf) ((shf)->fd)
|
||
|
|
#define shf_setfileno(shf,nfd) ((shf)->fd = (nfd))
|
||
|
|
#define shf_getc(shf) ((shf)->rnleft > 0 ? (shf)->rnleft--, *(shf)->rp++ : \
|
||
|
|
shf_getchar(shf))
|
||
|
|
#define shf_putc(c, shf) ((shf)->wnleft == 0 ? shf_putchar((c), (shf)) \
|
||
|
|
: ((shf)->wnleft--, *(shf)->wp++ = (c)))
|
||
|
|
#define shf_eof(shf) ((shf)->flags & SHF_EOF)
|
||
|
|
#define shf_error(shf) ((shf)->flags & SHF_ERROR)
|
||
|
|
#define shf_errno(shf) ((shf)->errno_)
|
||
|
|
#define shf_clearerr(shf) ((shf)->flags &= ~(SHF_EOF | SHF_ERROR))
|
||
|
|
|
||
|
|
/* Flags passed to shf_*open() */
|
||
|
|
#define SHF_RD 0x0001
|
||
|
|
#define SHF_WR 0x0002
|
||
|
|
#define SHF_RDWR (SHF_RD|SHF_WR)
|
||
|
|
#define SHF_ACCMODE 0x0003 /* mask */
|
||
|
|
#define SHF_GETFL 0x0004 /* use fcntl() to figure RD/WR flags */
|
||
|
|
#define SHF_UNBUF 0x0008 /* unbuffered I/O */
|
||
|
|
#define SHF_CLEXEC 0x0010 /* set close on exec flag */
|
||
|
|
#define SHF_MAPHI 0x0020 /* make fd > FDBASE (and close orig)
|
||
|
|
* (shf_open() only) */
|
||
|
|
#define SHF_DYNAMIC 0x0040 /* string: increase buffer as needed */
|
||
|
|
#define SHF_INTERRUPT 0x0080 /* EINTR in read/write causes error */
|
||
|
|
/* Flags used internally */
|
||
|
|
#define SHF_STRING 0x0100 /* a string, not a file */
|
||
|
|
#define SHF_ALLOCS 0x0200 /* shf and shf->buf were alloc()ed */
|
||
|
|
#define SHF_ALLOCB 0x0400 /* shf->buf was alloc()ed */
|
||
|
|
#define SHF_ERROR 0x0800 /* read()/write() error */
|
||
|
|
#define SHF_EOF 0x1000 /* read eof (sticky) */
|
||
|
|
#define SHF_READING 0x2000 /* currently reading: rnleft,rp valid */
|
||
|
|
#define SHF_WRITING 0x4000 /* currently writing: wnleft,wp valid */
|
||
|
|
|
||
|
|
|
||
|
|
struct shf {
|
||
|
|
int flags; /* see SHF_* */
|
||
|
|
unsigned char *rp; /* read: current position in buffer */
|
||
|
|
int rbsize; /* size of buffer (1 if SHF_UNBUF) */
|
||
|
|
int rnleft; /* read: how much data left in buffer */
|
||
|
|
unsigned char *wp; /* write: current position in buffer */
|
||
|
|
int wbsize; /* size of buffer (0 if SHF_UNBUF) */
|
||
|
|
int wnleft; /* write: how much space left in buffer */
|
||
|
|
unsigned char *buf; /* buffer */
|
||
|
|
int fd; /* file descriptor */
|
||
|
|
int errno_; /* saved value of errno after error */
|
||
|
|
int bsize; /* actual size of buf */
|
||
|
|
Area *areap; /* area shf/buf were allocated in */
|
||
|
|
};
|
||
|
|
|
||
|
|
extern struct shf shf_iob[];
|
||
|
|
|
||
|
|
struct shf *shf_open ARGS((const char *name, int oflags, int mode,
|
||
|
|
int sflags));
|
||
|
|
struct shf *shf_fdopen ARGS((int fd, int sflags, struct shf *shf));
|
||
|
|
struct shf *shf_reopen ARGS((int fd, int sflags, struct shf *shf));
|
||
|
|
struct shf *shf_sopen ARGS((char *buf, int bsize, int sflags,
|
||
|
|
struct shf *shf));
|
||
|
|
int shf_close ARGS((struct shf *shf));
|
||
|
|
int shf_fdclose ARGS((struct shf *shf));
|
||
|
|
char *shf_sclose ARGS((struct shf *shf));
|
||
|
|
int shf_finish ARGS((struct shf *shf));
|
||
|
|
int shf_flush ARGS((struct shf *shf));
|
||
|
|
int shf_seek ARGS((struct shf *shf, off_t where, int from));
|
||
|
|
int shf_read ARGS((char *buf, int bsize, struct shf *shf));
|
||
|
|
char *shf_getse ARGS((char *buf, int bsize, struct shf *shf));
|
||
|
|
int shf_getchar ARGS((struct shf *shf));
|
||
|
|
int shf_ungetc ARGS((int c, struct shf *shf));
|
||
|
|
int shf_putchar ARGS((int c, struct shf *shf));
|
||
|
|
int shf_puts ARGS((const char *s, struct shf *shf));
|
||
|
|
int shf_write ARGS((const char *buf, int nbytes, struct shf *shf));
|
||
|
|
int shf_fprintf ARGS((struct shf *shf, const char *fmt, ...));
|
||
|
|
int shf_snprintf ARGS((char *buf, int bsize, const char *fmt, ...));
|
||
|
|
char *shf_smprintf ARGS((const char *fmt, ...));
|
||
|
|
int shf_vfprintf ARGS((struct shf *, const char *fmt, va_list args));
|