Annotation of embedaddon/bmon/src/input.c, revision 1.1
1.1 ! misho 1: /*
! 2: * input.c Input API
! 3: *
! 4: * Copyright (c) 2001-2005 Thomas Graf <tgraf@suug.ch>
! 5: *
! 6: * Permission is hereby granted, free of charge, to any person obtaining a
! 7: * copy of this software and associated documentation files (the "Software"),
! 8: * to deal in the Software without restriction, including without limitation
! 9: * the rights to use, copy, modify, merge, publish, distribute, sublicense,
! 10: * and/or sell copies of the Software, and to permit persons to whom the
! 11: * Software is furnished to do so, subject to the following conditions:
! 12: *
! 13: * The above copyright notice and this permission notice shall be included
! 14: * in all copies or substantial portions of the Software.
! 15: *
! 16: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
! 17: * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
! 18: * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
! 19: * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
! 20: * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
! 21: * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
! 22: * DEALINGS IN THE SOFTWARE.
! 23: */
! 24:
! 25: #include <bmon/bmon.h>
! 26: #include <bmon/input.h>
! 27: #include <bmon/node.h>
! 28: #include <bmon/utils.h>
! 29:
! 30: static struct input_module *reg_pri_list;
! 31: static struct input_module *reg_sec_list;
! 32: static struct input_module *preferred;
! 33:
! 34: const char *
! 35: get_preferred_input_name(void)
! 36: {
! 37: return preferred ? preferred->im_name : "none";
! 38: }
! 39:
! 40: static inline void
! 41: __register_input_module(struct input_module *ops, struct input_module **list)
! 42: {
! 43: ops->im_next = *list;
! 44: *list = ops;
! 45: }
! 46:
! 47:
! 48: void
! 49: register_input_module(struct input_module *ops)
! 50: {
! 51: __register_input_module(ops, ®_pri_list);
! 52: }
! 53:
! 54: void
! 55: register_secondary_input_module(struct input_module *ops)
! 56: {
! 57: __register_input_module(ops, ®_sec_list);
! 58: }
! 59:
! 60: static inline struct input_module *
! 61: __get_input_module(const char *name, struct input_module *list)
! 62: {
! 63: struct input_module *i;
! 64:
! 65: for (i = list; i; i = i->im_next)
! 66: if (!strcmp(i->im_name, name))
! 67: return i;
! 68:
! 69: return NULL;
! 70: }
! 71:
! 72: static struct input_module *
! 73: get_input_module(const char *name)
! 74: {
! 75: return __get_input_module(name, reg_pri_list);
! 76: }
! 77:
! 78: static struct input_module *
! 79: get_sec_input_module(const char *name)
! 80: {
! 81: return __get_input_module(name, reg_sec_list);
! 82: }
! 83:
! 84: #define FOREACH_SIM(F) \
! 85: do { \
! 86: struct input_module *i; \
! 87: for (i = reg_sec_list; i; i = i->im_next) \
! 88: if (i->im_enable && i->im_##F) \
! 89: i->im_##F (); \
! 90: } while (0)
! 91:
! 92: static void
! 93: find_preferred(void)
! 94: {
! 95: if (NULL == preferred) {
! 96: struct input_module *i;
! 97: /*
! 98: * User has not chosen a output module
! 99: */
! 100:
! 101: #if defined SYS_SUNOS
! 102: preferred = get_input_module("kstat");
! 103: #elif defined SYS_BSD
! 104: preferred = get_input_module("sysctl");
! 105: #elif defined SYS_LINUX
! 106: preferred = get_input_module("netlink");
! 107:
! 108: if (NULL == preferred)
! 109: preferred = get_input_module("proc");
! 110:
! 111: if (NULL == preferred)
! 112: preferred = get_input_module("sysfs");
! 113: #endif
! 114:
! 115: if (NULL == preferred) {
! 116: for (i = reg_pri_list; i; i = i->im_next) {
! 117: if (i->im_no_default) {
! 118: preferred = i;
! 119: break;
! 120: }
! 121: }
! 122: }
! 123:
! 124: if (NULL == preferred)
! 125: quit("No input method found\n");
! 126: }
! 127: }
! 128:
! 129:
! 130: void
! 131: input_read(void)
! 132: {
! 133: find_preferred();
! 134:
! 135: reset_nodes();
! 136: preferred->im_read();
! 137:
! 138: FOREACH_SIM(read);
! 139:
! 140: remove_unused_node_items();
! 141: }
! 142:
! 143: static void
! 144: list_input(void)
! 145: {
! 146: struct input_module *i;
! 147:
! 148: printf("Input modules:\n");
! 149: if (NULL == reg_pri_list)
! 150: printf("\tNo input modules found.\n");
! 151: else
! 152: for (i = reg_pri_list; i; i = i->im_next)
! 153: printf("\t%s\n", i->im_name);
! 154: }
! 155:
! 156: void
! 157: set_input(const char *name)
! 158: {
! 159: static int set = 0;
! 160: module_conf_t *ml, *m;
! 161:
! 162: if (set)
! 163: return;
! 164: set = 1;
! 165:
! 166: if (NULL == name || !strcasecmp(name, "list")) {
! 167: list_input();
! 168: exit(0);
! 169: }
! 170:
! 171: ml = parse_module_param(name);
! 172:
! 173: for (m = ml; m; m = m->next) {
! 174: preferred = get_input_module(ml->name);
! 175:
! 176: if (NULL == preferred)
! 177: continue;
! 178:
! 179: if (preferred->im_set_opts)
! 180: preferred->im_set_opts(ml->attrs);
! 181:
! 182: if (preferred->im_probe)
! 183: if (preferred->im_probe())
! 184: return;
! 185: }
! 186:
! 187: quit("No (working) input module found\n");
! 188: }
! 189:
! 190: static void
! 191: list_sec_input(void)
! 192: {
! 193: struct input_module *i;
! 194:
! 195: printf("Secondary input modules:\n");
! 196: if (NULL == reg_sec_list)
! 197: printf("\tNo secondary input modules found.\n");
! 198: else
! 199: for (i = reg_sec_list; i; i = i->im_next)
! 200: printf("\t%s\n", i->im_name);
! 201: }
! 202:
! 203: void
! 204: set_sec_input(const char *name)
! 205: {
! 206: static int set = 0;
! 207: module_conf_t *ml, *m;
! 208:
! 209: if (set)
! 210: return;
! 211: set = 1;
! 212:
! 213: if (NULL == name || !strcasecmp(name, "list")) {
! 214: list_sec_input();
! 215: exit(0);
! 216: }
! 217:
! 218: ml = parse_module_param(name);
! 219:
! 220: for (m = ml; m; m = m->next) {
! 221: struct input_module *i = get_sec_input_module(m->name);
! 222:
! 223: if (NULL == i)
! 224: continue;
! 225:
! 226: if (i->im_set_opts)
! 227: i->im_set_opts(ml->attrs);
! 228:
! 229: if (i->im_probe) {
! 230: if (i->im_probe() == 1)
! 231: i->im_enable = 1;
! 232: }
! 233: }
! 234: }
! 235:
! 236: void
! 237: input_init(void)
! 238: {
! 239: find_preferred();
! 240:
! 241: if (preferred->im_init)
! 242: preferred->im_init();
! 243:
! 244: FOREACH_SIM(init);
! 245: }
! 246:
! 247: void
! 248: input_shutdown(void)
! 249: {
! 250: find_preferred();
! 251:
! 252: if (preferred->im_shutdown)
! 253: preferred->im_shutdown();
! 254:
! 255: FOREACH_SIM(shutdown);
! 256: }
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