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Annotation of embedaddon/bmon/src/out_xml_state.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * out_xml_state.c     State based XML output
                      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/node.h>
                     27: #include <bmon/output.h>
                     28: #include <bmon/graph.h>
                     29: #include <bmon/input.h>
                     30: #include <bmon/utils.h>
                     31: 
                     32: static const char *c_file;
                     33: static int c_nolock = 0;
                     34: 
                     35: static void write_attr(stat_attr_t *a, void *arg)
                     36: {
                     37:        FILE *fd = (FILE *) arg;
                     38:        fprintf(fd,
                     39:            "<attr name=\"%s\" rx=\"%" PRIu64 "\" tx=\"%" PRIu64 "\" />\n",
                     40:            type2name(a->a_type), attr_get_rx(a), attr_get_tx(a));
                     41: }
                     42: 
                     43: static void write_per_item(item_t *it, void *arg)
                     44: {
                     45:        FILE *fd = (FILE *) arg;
                     46:        fprintf(fd, "<item index=\"%d\" name=\"%s\" handle=\"%d\" " \
                     47:                    "level=\"%d\" ischild=\"%d\" parent=\"%d\" >\n",
                     48:                    it->i_index, it->i_name, it->i_handle, it->i_level,
                     49:                    !!(it->i_flags & ITEM_FLAG_IS_CHILD), it->i_parent);
                     50:        foreach_attr(it, &write_attr, fd);
                     51:        fprintf(fd, "</item>\n");
                     52: }
                     53: 
                     54: static void write_per_node(node_t *node, void *arg)
                     55: {
                     56:        FILE *fd = (FILE *) arg;
                     57:        fprintf(fd, "<node index=\"%d\" name=\"%s\" from=\"%s\">\n",
                     58:                    node->n_index, node->n_name, node->n_from ? : "local");
                     59:        foreach_item(node, write_per_item, fd);
                     60:        fprintf(fd, "</node>\n");
                     61: }
                     62: 
                     63: void xml_state_draw(void)
                     64: {
                     65:        FILE *fd;
                     66: 
                     67:        fd = fopen(c_file, "w");
                     68:        if (fd == NULL)
                     69:                return;
                     70: 
                     71:        /* We ignore a locking failure and simply try again next time */
                     72:        if (!c_nolock && flock(fileno(fd), LOCK_EX | LOCK_NB) < 0)
                     73:                return;
                     74:        
                     75:        fprintf(fd,
                     76:            "<?xml version=\"1.0\"?>\n" \
                     77:            "<statefile ts_sec=\"%" PRId64 "\" ts_usec=\"%" PRId64 "\">\n",
                     78:            rtiming.rt_last_read.tv_sec, rtiming.rt_last_read.tv_usec);
                     79: 
                     80:        foreach_node(write_per_node, fd);
                     81:        fprintf(fd, "</statefile>\n");
                     82: 
                     83:        if (!c_nolock)
                     84:                flock(fileno(fd), LOCK_UN | LOCK_NB);
                     85:        fclose(fd);
                     86: }
                     87: 
                     88: static void print_module_help(void)
                     89: {
                     90:        printf(
                     91:        "xml_state - State Based XML Output\n" \
                     92:        "\n" \
                     93:        "  XML based state output, outputs counters as-is as XML\n" \
                     94:        "  objects into a file. The file is overwritten in each\n" \
                     95:        "  cycle and locked during this period if nolock is not\n" \
                     96:        "  specified.\n" \
                     97:        "  Author: Thomas Graf <tgraf@suug.ch>\n" \
                     98:        "\n" \
                     99:        "  Options:\n" \
                    100:        "    path=FILE        Output file (default: stdout)\n" \
                    101:        "    nolock           Do not lock the file\n");
                    102: }
                    103: 
                    104: static void xml_state_set_opts(tv_t *attrs)
                    105: {
                    106:        while (attrs) {
                    107:                if (!strcasecmp(attrs->type, "path") && attrs->value)
                    108:                        c_file = attrs->value;
                    109:                else if (!strcasecmp(attrs->type, "nolock"))
                    110:                        c_nolock = 1;
                    111:                else if (!strcasecmp(attrs->type, "help")) {
                    112:                        print_module_help();
                    113:                        exit(0);
                    114:                }
                    115:                
                    116:                attrs = attrs->next;
                    117:        }
                    118: }
                    119: 
                    120: static int xml_state_probe(void)
                    121: {
                    122:        FILE *t;
                    123: 
                    124:        if (c_file == NULL) {
                    125:                fprintf(stderr, "xml_state: You must specify a output file\n");
                    126:                return 0;
                    127:        }
                    128: 
                    129:        t = fopen(c_file, "w");
                    130:        if (t == NULL) {
                    131:                fprintf(stderr, "xml_state: Unable to open output file %s:%s\n",
                    132:                    c_file, strerror(errno));
                    133:                return 0;
                    134:        }
                    135: 
                    136:        return 1;
                    137: }
                    138: 
                    139: static struct output_module xml_state_ops = {
                    140:        .om_name = "xml_state",
                    141:        .om_draw = xml_state_draw,
                    142:        .om_set_opts = xml_state_set_opts,
                    143:        .om_probe = xml_state_probe
                    144: };
                    145: 
                    146: static void __init xml_state_init(void)
                    147: {
                    148:        register_secondary_output_module(&xml_state_ops);
                    149: }