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 42 struct 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 57 extern struct shf shf_iob[]; 58 59 struct shf *shf_open(const char *, int, int, int); 60 struct shf *shf_fdopen(int, int, struct shf *); 61 struct shf *shf_reopen(int, int, struct shf *); 62 struct shf *shf_sopen(char *, int, int, struct shf *); 63 int shf_close(struct shf *); 64 int shf_fdclose(struct shf *); 65 char *shf_sclose(struct shf *); 66 int shf_flush(struct shf *); 67 int shf_read(char *, int, struct shf *); 68 char *shf_getse(char *, int, struct shf *); 69 int shf_getchar(struct shf *s); 70 int shf_ungetc(int, struct shf *); 71 int shf_putchar(int, struct shf *); 72 int shf_puts(const char *, struct shf *); 73 int shf_write(const char *, int, struct shf *); 74 int shf_fprintf(struct shf *, const char *, ...); 75 int shf_snprintf(char *, int, const char *, ...); 76 char *shf_smprintf(const char *, ...); 77 int shf_vfprintf(struct shf *, const char *, va_list); 78 79 #endif /* SHF_H */ 80