xref: /minix/bin/ksh/shf.h (revision 2718b568)
1 /*	$NetBSD: shf.h,v 1.3 1999/10/20 15:10:00 hubertf Exp $	*/
2 
3 #ifndef SHF_H
4 # define SHF_H
5 
6 /*
7  * Shell file I/O routines
8  */
9 /* $Id: shf.h,v 1.3 1999/10/20 15:10:00 hubertf Exp $ */
10 
11 #define SHF_BSIZE	512
12 
13 #define shf_fileno(shf)	((shf)->fd)
14 #define shf_setfileno(shf,nfd)	((shf)->fd = (nfd))
15 #define shf_getc(shf) ((shf)->rnleft > 0 ? (shf)->rnleft--, *(shf)->rp++ : \
16 			shf_getchar(shf))
17 #define shf_putc(c, shf)	((shf)->wnleft == 0 ? shf_putchar((c), (shf)) \
18 					: ((shf)->wnleft--, *(shf)->wp++ = (c)))
19 #define shf_eof(shf)		((shf)->flags & SHF_EOF)
20 #define shf_error(shf)		((shf)->flags & SHF_ERROR)
21 #define shf_errno(shf)		((shf)->errno_)
22 #define shf_clearerr(shf)	((shf)->flags &= ~(SHF_EOF | SHF_ERROR))
23 
24 /* Flags passed to shf_*open() */
25 #define SHF_RD		0x0001
26 #define SHF_WR		0x0002
27 #define SHF_RDWR	  (SHF_RD|SHF_WR)
28 #define SHF_ACCMODE	  0x0003	/* mask */
29 #define SHF_GETFL	0x0004		/* use fcntl() to figure RD/WR flags */
30 #define SHF_UNBUF	0x0008		/* unbuffered I/O */
31 #define SHF_CLEXEC	0x0010		/* set close on exec flag */
32 #define SHF_MAPHI	0x0020		/* make fd > FDBASE (and close orig)
33 					 * (shf_open() only) */
34 #define SHF_DYNAMIC	0x0040		/* string: increase buffer as needed */
35 #define SHF_INTERRUPT	0x0080		/* EINTR in read/write causes error */
36 /* Flags used internally */
37 #define SHF_STRING	0x0100		/* a string, not a file */
38 #define SHF_ALLOCS	0x0200		/* shf and shf->buf were alloc()ed */
39 #define SHF_ALLOCB	0x0400		/* shf->buf was alloc()ed */
40 #define SHF_ERROR	0x0800		/* read()/write() error */
41 #define SHF_EOF		0x1000		/* read eof (sticky) */
42 #define SHF_READING	0x2000		/* currently reading: rnleft,rp valid */
43 #define SHF_WRITING	0x4000		/* currently writing: wnleft,wp valid */
44 
45 
46 struct shf {
47 	int flags;		/* see SHF_* */
48 	unsigned char *rp;	/* read: current position in buffer */
49 	int rbsize;		/* size of buffer (1 if SHF_UNBUF) */
50 	int rnleft;		/* read: how much data left in buffer */
51 	unsigned char *wp;	/* write: current position in buffer */
52 	int wbsize;		/* size of buffer (0 if SHF_UNBUF) */
53 	int wnleft;		/* write: how much space left in buffer */
54 	unsigned char *buf;	/* buffer */
55 	int fd;			/* file descriptor */
56 	int errno_;		/* saved value of errno after error */
57 	int bsize;		/* actual size of buf */
58 	Area *areap;		/* area shf/buf were allocated in */
59 };
60 
61 extern struct shf shf_iob[];
62 
63 struct shf *shf_open	ARGS((const char *name, int oflags, int mode,
64 			      int sflags));
65 struct shf *shf_fdopen	ARGS((int fd, int sflags, struct shf *shf));
66 struct shf *shf_reopen  ARGS((int fd, int sflags, struct shf *shf));
67 struct shf *shf_sopen	ARGS((char *buf, int bsize, int sflags,
68 			      struct shf *shf));
69 int	    shf_close	ARGS((struct shf *shf));
70 int	    shf_fdclose	ARGS((struct shf *shf));
71 char	   *shf_sclose	ARGS((struct shf *shf));
72 int	    shf_finish	ARGS((struct shf *shf));
73 int	    shf_flush	ARGS((struct shf *shf));
74 int	    shf_seek	ARGS((struct shf *shf, off_t where, int from));
75 int	    shf_read	ARGS((char *buf, int bsize, struct shf *shf));
76 char	   *shf_getse	ARGS((char *buf, int bsize, struct shf *shf));
77 int	    shf_getchar	ARGS((struct shf *shf));
78 int	    shf_ungetc	ARGS((int c, struct shf *shf));
79 int	    shf_putchar	ARGS((int c, struct shf *shf));
80 int	    shf_puts	ARGS((const char *s, struct shf *shf));
81 int	    shf_write	ARGS((const char *buf, int nbytes, struct shf *shf));
82 int	    shf_fprintf ARGS((struct shf *shf, const char *fmt, ...));
83 int	    shf_snprintf ARGS((char *buf, int bsize, const char *fmt, ...));
84 char	    *shf_smprintf ARGS((const char *fmt, ...));
85 int	    shf_vfprintf ARGS((struct shf *, const char *fmt, va_list args));
86 
87 #endif /* SHF_H */
88