| 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 [-adpqsu] [var[=data] ...]\n"); |
| 152 | } |
| 153 | |