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