1/*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Chris Torek. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 20 unchanged lines hidden (view full) --- 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33#if defined(LIBC_SCCS) && !defined(lint) 34static char sccsid[] = "@(#)findfp.c 8.2 (Berkeley) 1/4/94"; 35#endif /* LIBC_SCCS and not lint */ 36#include <sys/cdefs.h> |
37__FBSDID("$FreeBSD: head/lib/libc/stdio/findfp.c 178287 2008-04-17 22:17:54Z jhb $"); |
38 39#include <sys/param.h> 40#include <machine/atomic.h> 41#include <unistd.h> 42#include <stdio.h> 43#include <stdlib.h> 44#include <string.h> 45 46#include <spinlock.h> 47 48#include "libc_private.h" 49#include "local.h" 50#include "glue.h" 51 52int __sdidinit; 53 54#define NDYNAMIC 10 /* add ten more whenever necessary */ 55 56#define std(flags, file) \ |
57 {0,0,0,flags,file,{0},0,__sF+file,__sclose,__sread,__sseek,__swrite} |
58 /* p r w flags file _bf z cookie close read seek write */ |
59 |
60 /* the usual - (stdin + stdout + stderr) */ 61static FILE usual[FOPEN_MAX - 3]; |
62static struct glue uglue = { NULL, FOPEN_MAX - 3, usual }; 63 |
64static FILE __sF[3] = { |
65 std(__SRD, STDIN_FILENO), 66 std(__SWR, STDOUT_FILENO), 67 std(__SWR|__SNBF, STDERR_FILENO) 68}; 69 |
70FILE *__stdinp = &__sF[0]; 71FILE *__stdoutp = &__sF[1]; 72FILE *__stderrp = &__sF[2]; 73 74struct glue __sglue = { &uglue, 3, __sF }; 75static struct glue *lastglue = &uglue; 76 77static struct glue * moreglue(int); --- 9 unchanged lines hidden (view full) --- 87#endif 88 89static struct glue * 90moreglue(n) 91 int n; 92{ 93 struct glue *g; 94 static FILE empty; |
95 FILE *p; |
96 |
97 g = (struct glue *)malloc(sizeof(*g) + ALIGNBYTES + n * sizeof(FILE)); |
98 if (g == NULL) 99 return (NULL); 100 p = (FILE *)ALIGN(g + 1); |
101 g->next = NULL; 102 g->niobs = n; 103 g->iobs = p; |
104 while (--n >= 0) 105 *p++ = empty; |
106 return (g); 107} 108 109/* 110 * Find a free FILE for fopen et al. 111 */ 112FILE * 113__sfp() --- 31 unchanged lines hidden (view full) --- 145 fp->_lbfsize = 0; /* not line buffered */ 146 fp->_file = -1; /* no file */ 147/* fp->_cookie = <any>; */ /* caller sets cookie, _read/_write etc */ 148 fp->_ub._base = NULL; /* no ungetc buffer */ 149 fp->_ub._size = 0; 150 fp->_lb._base = NULL; /* no line buffer */ 151 fp->_lb._size = 0; 152/* fp->_lock = NULL; */ /* once set always set (reused) */ |
153 fp->_orientation = 0; 154 memset(&fp->_mbstate, 0, sizeof(mbstate_t)); |
155 return (fp); 156} 157 158/* 159 * XXX. Force immediate allocation of internal memory. Not used by stdio, 160 * but documented historically for certain applications. Bad applications. 161 */ 162__warn_references(f_prealloc, --- 36 unchanged lines hidden (view full) --- 199} 200 201/* 202 * __sinit() is called whenever stdio's internal variables must be set up. 203 */ 204void 205__sinit() 206{ |
207 |
208 /* Make sure we clean up on exit. */ 209 __cleanup = _cleanup; /* conservative */ 210 __sdidinit = 1; |
211} |