subr_hints.c (229272) | subr_hints.c (240067) |
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1/*- 2 * Copyright (c) 2000,2001 Peter Wemm <peter@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 11 unchanged lines hidden (view full) --- 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 2000,2001 Peter Wemm <peter@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 11 unchanged lines hidden (view full) --- 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> |
28__FBSDID("$FreeBSD: head/sys/kern/subr_hints.c 229272 2012-01-02 12:12:10Z ed $"); | 28__FBSDID("$FreeBSD: head/sys/kern/subr_hints.c 240067 2012-09-03 08:52:05Z ray $"); |
29 30#include <sys/param.h> 31#include <sys/lock.h> | 29 30#include <sys/param.h> 31#include <sys/lock.h> |
32#include <sys/malloc.h> |
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32#include <sys/mutex.h> 33#include <sys/systm.h> | 33#include <sys/mutex.h> 34#include <sys/systm.h> |
35#include <sys/sysctl.h> |
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34#include <sys/bus.h> 35 36/* 37 * Access functions for device resources. 38 */ 39 40static int checkmethod = 1; 41static int use_kenv; 42static char *hintp; 43 44/* | 36#include <sys/bus.h> 37 38/* 39 * Access functions for device resources. 40 */ 41 42static int checkmethod = 1; 43static int use_kenv; 44static char *hintp; 45 46/* |
47 * Define kern.hintmode sysctl, which only accept value 2, that cause to 48 * switch from Static KENV mode to Dynamic KENV. So systems that have hints 49 * compiled into kernel will be able to see/modify KENV (and hints too). 50 */ 51 52static int 53sysctl_hintmode(SYSCTL_HANDLER_ARGS) 54{ 55 int error, i, from_kenv, value, eqidx; 56 const char *cp; 57 char *line, *eq; 58 59 from_kenv = 0; 60 cp = kern_envp; 61 value = hintmode; 62 63 /* Fetch candidate for new hintmode value */ 64 error = sysctl_handle_int(oidp, &value, 0, req); 65 if (error || !req->newptr) 66 return (error); 67 68 if (value != 2) 69 /* Only accept swithing to hintmode 2 */ 70 return (EINVAL); 71 72 /* Migrate from static to dynamic hints */ 73 switch (hintmode) { 74 case 0: 75 if (dynamic_kenv) 76 /* Already here */ 77 hintmode = value; /* XXX: Need we switch or not ? */ 78 return (0); 79 from_kenv = 1; 80 cp = kern_envp; 81 break; 82 case 1: 83 cp = static_hints; 84 break; 85 case 2: 86 /* Nothing to do, hintmode already 2 */ 87 return (0); 88 } 89 90 while (cp) { 91 i = strlen(cp); 92 if (i == 0) 93 break; 94 if (from_kenv) { 95 if (strncmp(cp, "hint.", 5) != 0) 96 /* kenv can have not only hints */ 97 continue; 98 } 99 eq = strchr(cp, '='); 100 if (!eq) 101 /* Bad hint value */ 102 continue; 103 eqidx = eq - cp; 104 105 line = malloc(i+1, M_TEMP, M_WAITOK); 106 strcpy(line, cp); 107 line[eqidx] = '\0'; 108 setenv(line, line + eqidx + 1); 109 free(line, M_TEMP); 110 cp += i + 1; 111 } 112 113 hintmode = value; 114 use_kenv = 1; 115 return (0); 116} 117 118SYSCTL_PROC(_kern, OID_AUTO, hintmode, CTLTYPE_INT|CTLFLAG_RW, 119 &hintmode, 0, sysctl_hintmode, "I", "Get/set current hintmode"); 120 121/* |
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45 * Evil wildcarding resource string lookup. 46 * This walks the supplied env string table and returns a match. 47 * The start point can be remembered for incremental searches. 48 */ 49static int 50res_find(int *line, int *startln, 51 const char *name, int *unit, const char *resname, const char *value, 52 const char **ret_name, int *ret_namelen, int *ret_unit, --- 330 unchanged lines hidden --- | 122 * Evil wildcarding resource string lookup. 123 * This walks the supplied env string table and returns a match. 124 * The start point can be remembered for incremental searches. 125 */ 126static int 127res_find(int *line, int *startln, 128 const char *name, int *unit, const char *resname, const char *value, 129 const char **ret_name, int *ret_namelen, int *ret_unit, --- 330 unchanged lines hidden --- |