1 /* 2 * Copyright (c) 2003 Matthew Dillon <dillon@backplane.com> 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 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 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 * $DragonFly: src/bin/varsym/varsym.c,v 1.4 2003/12/11 20:33:49 dillon Exp $ 27 */ 28 29 #include <stdio.h> 30 #include <stdlib.h> 31 #include <string.h> 32 #include <errno.h> 33 #include <unistd.h> 34 #include <sys/varsym.h> 35 36 static void usage(void); 37 static void dumpvars(char *buf, int bytes); 38 39 int 40 main(int ac, char **av) 41 { 42 int i; 43 int mask = VARSYM_ALL_MASK; 44 int level = VARSYM_USER; 45 int deleteOpt = 0; 46 int verboseOpt = 1; 47 int allOpt = 0; 48 49 while ((i = getopt(ac, av, "adhpqsu")) != -1) { 50 switch (i) { 51 case 'a': 52 allOpt = 1; 53 break; 54 case 'd': 55 deleteOpt = 1; 56 break; 57 case 'p': 58 mask = VARSYM_PROC_MASK; 59 level = VARSYM_PROC; 60 break; 61 case 'q': 62 verboseOpt = 0; 63 break; 64 case 's': 65 mask = VARSYM_SYS_MASK; 66 level = VARSYM_SYS; 67 break; 68 case 'u': 69 mask = VARSYM_USER_MASK; 70 level = VARSYM_USER; 71 break; 72 case 'h': 73 default: 74 usage(); 75 return(-1); 76 } 77 } 78 79 if (allOpt) { 80 char buf[1024]; 81 int marker = 0; 82 int bytes; 83 84 for (;;) { 85 bytes = varsym_list(level, buf, sizeof(buf), &marker); 86 if (bytes < 0) /* error occured */ 87 break; 88 dumpvars(buf, bytes); 89 if (marker < 0) /* no more vars */ 90 break; 91 } 92 if (bytes < 0) 93 fprintf(stderr, "varsym_list(): %s\n", strerror(errno)); 94 } 95 96 for ( ; optind < ac; optind++) { 97 char *name = av[optind]; 98 char *data = strchr(name, '='); 99 int error; 100 char buf[MAXVARSYM_DATA]; 101 102 if (data) 103 *data++ = 0; 104 105 if (deleteOpt) { 106 error = varsym_set(level, name, NULL); 107 } 108 else if (data) { 109 error = varsym_set(level, name, data); 110 } 111 else { 112 error = varsym_get(mask, name, buf, sizeof(buf)); 113 if (error >= 0 && error <= (int)sizeof(buf)) { 114 if (verboseOpt) 115 printf("%s=", name); 116 printf("%s\n", buf); 117 } 118 } 119 if (error < 0 && verboseOpt) 120 fprintf(stderr, "%s: %s\n", name, strerror(errno)); 121 } 122 123 return(0); 124 } 125 126 static void 127 dumpvars(char *buf, int bytes) 128 { 129 int b; 130 int i; 131 char *vname = NULL; 132 char *vdata = NULL; 133 134 for (b = i = 0; i < bytes; ++i) { 135 if (buf[i] == 0) { 136 if (vname == NULL) { 137 vname = buf + b; 138 } else { 139 vdata = buf + b; 140 printf("%s=%s\n", vname, vdata); 141 vname = vdata = NULL; 142 } 143 b = i + 1; 144 } 145 } 146 } 147 148 static void 149 usage(void) 150 { 151 fprintf(stderr, "usage: varsym: [-aqdsup] var[=data]\n"); 152 } 153 154