1/* $OpenBSD: shf.h,v 1.8 2015/12/14 06:09:43 mmcc Exp $ */ 2 3#ifndef SHF_H 4# define SHF_H 5 6/* 7 * Shell file I/O routines 8 */ 9 10#define SHF_BSIZE 512 11 12#define shf_getc(shf) ((shf)->rnleft > 0 ? (shf)->rnleft--, *(shf)->rp++ : \ 13 shf_getchar(shf)) 14#define shf_putc(c, shf) ((shf)->wnleft == 0 ? shf_putchar((c), (shf)) : \ 15 ((shf)->wnleft--, *(shf)->wp++ = (c))) 16#define shf_eof(shf) ((shf)->flags & SHF_EOF) 17#define shf_error(shf) ((shf)->flags & SHF_ERROR) 18#define shf_clearerr(shf) ((shf)->flags &= ~(SHF_EOF | SHF_ERROR)) 19 20/* Flags passed to shf_*open() */ 21#define SHF_RD 0x0001 22#define SHF_WR 0x0002 23#define SHF_RDWR (SHF_RD|SHF_WR) 24#define SHF_ACCMODE 0x0003 /* mask */ 25#define SHF_GETFL 0x0004 /* use fcntl() to figure RD/WR flags */ 26#define SHF_UNBUF 0x0008 /* unbuffered I/O */ 27#define SHF_CLEXEC 0x0010 /* set close on exec flag */ 28#define SHF_MAPHI 0x0020 /* make fd > FDBASE (and close orig) 29 * (shf_open() only) */ 30#define SHF_DYNAMIC 0x0040 /* string: increase buffer as needed */ 31#define SHF_INTERRUPT 0x0080 /* EINTR in read/write causes error */ 32/* Flags used internally */ 33#define SHF_STRING 0x0100 /* a string, not a file */ 34#define SHF_ALLOCS 0x0200 /* shf and shf->buf were alloc()ed */ 35#define SHF_ALLOCB 0x0400 /* shf->buf was alloc()ed */ 36#define SHF_ERROR 0x0800 /* read()/write() error */ 37#define SHF_EOF 0x1000 /* read eof (sticky) */ 38#define SHF_READING 0x2000 /* currently reading: rnleft,rp valid */ 39#define SHF_WRITING 0x4000 /* currently writing: wnleft,wp valid */ 40 41 42struct shf { 43 int flags; /* see SHF_* */ 44 unsigned char *rp; /* read: current position in buffer */ 45 int rbsize; /* size of buffer (1 if SHF_UNBUF) */ 46 int rnleft; /* read: how much data left in buffer */ 47 unsigned char *wp; /* write: current position in buffer */ 48 int wbsize; /* size of buffer (0 if SHF_UNBUF) */ 49 int wnleft; /* write: how much space left in buffer */ 50 unsigned char *buf; /* buffer */ 51 int fd; /* file descriptor */ 52 int errno_; /* saved value of errno after error */ 53 int bsize; /* actual size of buf */ 54 Area *areap; /* area shf/buf were allocated in */ 55}; 56 57extern struct shf shf_iob[]; 58 59struct shf *shf_open(const char *, int, int, int); 60struct shf *shf_fdopen(int, int, struct shf *); 61struct shf *shf_reopen(int, int, struct shf *); 62struct shf *shf_sopen(char *, int, int, struct shf *); 63int shf_close(struct shf *); 64int shf_fdclose(struct shf *); 65char *shf_sclose(struct shf *); 66int shf_flush(struct shf *); 67int shf_read(char *, int, struct shf *); 68char *shf_getse(char *, int, struct shf *); 69int shf_getchar(struct shf *s); 70int shf_ungetc(int, struct shf *); 71int shf_putchar(int, struct shf *); 72int shf_puts(const char *, struct shf *); 73int shf_write(const char *, int, struct shf *); 74int shf_fprintf(struct shf *, const char *, ...); 75int shf_snprintf(char *, int, const char *, ...); 76char *shf_smprintf(const char *, ...); 77int shf_vfprintf(struct shf *, const char *, va_list); 78 79#endif /* SHF_H */ 80