src/statgrab/statgrab.c

/* 
 * i-scream central monitoring system
 * http://www.i-scream.org
 * Copyright (C) 2000-2004 i-scream
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Id: statgrab.c,v 1.18 2004/02/13 12:52:40 ats Exp $
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <statgrab.h>
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>

typedef enum {
        LONG_LONG = 0,
        TIME_T,
        FLOAT,
        DOUBLE,
        STRING,
        INT,
        DUPLEX
} stat_type;

typedef enum {
        DISPLAY_LINUX = 0,
        DISPLAY_BSD,
        DISPLAY_MRTG,
        DISPLAY_PLAIN
} display_mode_type;

typedef enum {
        REPEAT_NONE = 0,
        REPEAT_ONCE,
        REPEAT_FOREVER
} repeat_mode_type;

typedef struct {
        char *name;
        stat_type type;
        void *stat;
} stat;

stat *stats = NULL;
int num_stats = 0;
int alloc_stats = 0;
#define INCREMENT_STATS 64

display_mode_type display_mode = DISPLAY_LINUX;
repeat_mode_type repeat_mode = REPEAT_NONE;
int repeat_time = 1;
int use_cpu_percent = 0;
int use_diffs = 0;

/* Exit with an error message. */
void die(const char *s) {
        fprintf(stderr, "fatal: %s\n", s);
        exit(1);
}

/* Remove all the recorded stats. */
void clear_stats() {
        int i;

        for (i = 0; i < num_stats; i++)
                free(stats[i].name);
        num_stats = 0;
}

/* Add a stat. The varargs make up the name, joined with dots; the name is
   terminated with a NULL. */
void add_stat(stat_type type, void *stat, ...) {
        va_list ap;
        int len = 0;
        char *name, *p;

        /* Figure out how long the name will be, including dots and trailing
           \0. */
        va_start(ap, stat);
        while (1) {
                const char *part = va_arg(ap, const char *);
                if (part == NULL)
                        break;
                len += 1 + strlen(part);
        }
        va_end(ap);

        /* Paste the name together. */
        name = malloc(len);
        if (name == NULL)
                die("out of memory");
        p = name;
        va_start(ap, stat);
        while (1) {
                const char *part = va_arg(ap, const char *);
                int partlen;
                if (part == NULL)
                        break;
                partlen = strlen(part);
                memcpy(p, part, partlen);
                p += partlen;
                *p++ = '.';
        }
        va_end(ap);
        *--p = '\0';

        /* Replace spaces with underscores. */
        for (p = name; *p != '\0'; p++) {
                if (*p == ' ')
                        *p = '_';
        }

        /* Stretch the stats array if necessary. */
        if (num_stats >= alloc_stats) {
                alloc_stats += INCREMENT_STATS;
                stats = realloc(stats, alloc_stats * sizeof *stats);
                if (stats == NULL)
                        die("out of memory");
        }

        stats[num_stats].name = name;
        stats[num_stats].type = type;
        stats[num_stats].stat = stat;
        ++num_stats;
}

/* Compare two stats by name for qsort and bsearch. */
int stats_compare(const void *a, const void *b) {
        return strcmp(((stat *)a)->name, ((stat *)b)->name);
}

/* Compare up to the length of the key for bsearch. */
int stats_compare_prefix(const void *key, const void *item) {
        const char *kn = ((stat *)key)->name;
        const char *in = ((stat *)item)->name;

        return strncmp(kn, in, strlen(kn));
}

void populate_const() {
        static int zero = 0;

        /* Constants, for use with MRTG mode. */
        add_stat(INT, &zero, "const", "0", NULL);
}

void populate_cpu() {
        if (use_cpu_percent) {
                cpu_percent_t *cpu_p = cpu_percent_usage();

                if (cpu_p != NULL) {
                        add_stat(FLOAT, &cpu_p->user,
                                 "cpu", "user", NULL);
                        add_stat(FLOAT, &cpu_p->kernel,
                                 "cpu", "kernel", NULL);
                        add_stat(FLOAT, &cpu_p->idle,
                                 "cpu", "idle", NULL);
                        add_stat(FLOAT, &cpu_p->iowait,
                                 "cpu", "iowait", NULL);
                        add_stat(FLOAT, &cpu_p->swap,
                                 "cpu", "swap", NULL);
                        add_stat(FLOAT, &cpu_p->nice,
                                 "cpu", "nice", NULL);
                        add_stat(TIME_T, &cpu_p->time_taken,
                                 "cpu", "time_taken", NULL);
                }
        } else {
                cpu_states_t *cpu_s;

                cpu_s = use_diffs ? get_cpu_diff() : get_cpu_totals();
                if (cpu_s != NULL) {
                        add_stat(LONG_LONG, &cpu_s->user,
                                 "cpu", "user", NULL);
                        add_stat(LONG_LONG, &cpu_s->kernel,
                                 "cpu", "kernel", NULL);
                        add_stat(LONG_LONG, &cpu_s->idle,
                                 "cpu", "idle", NULL);
                        add_stat(LONG_LONG, &cpu_s->iowait,
                                 "cpu", "iowait", NULL);
                        add_stat(LONG_LONG, &cpu_s->swap,
                                 "cpu", "swap", NULL);
                        add_stat(LONG_LONG, &cpu_s->nice,
                                 "cpu", "nice", NULL);
                        add_stat(LONG_LONG, &cpu_s->total,
                                 "cpu", "total", NULL);
                        add_stat(TIME_T, &cpu_s->systime,
                                 "cpu", "systime", NULL);
                }
        }
}

void populate_mem() {
        mem_stat_t *mem = get_memory_stats();

        if (mem != NULL) {
                add_stat(LONG_LONG, &mem->total, "mem", "total", NULL);
                add_stat(LONG_LONG, &mem->free, "mem", "free", NULL);
                add_stat(LONG_LONG, &mem->used, "mem", "used", NULL);
                add_stat(LONG_LONG, &mem->cache, "mem", "cache", NULL);
        }
}

void populate_load() {
        load_stat_t *load = get_load_stats();

        if (load != NULL) {
                add_stat(DOUBLE, &load->min1, "load", "min1", NULL);
                add_stat(DOUBLE, &load->min5, "load", "min5", NULL);
                add_stat(DOUBLE, &load->min15, "load", "min15", NULL);
        }
}

void populate_user() {
        user_stat_t *user = get_user_stats();

        if (user != NULL) {
                add_stat(INT, &user->num_entries, "user", "num", NULL);
                add_stat(STRING, &user->name_list, "user", "names", NULL);
        }
}

void populate_swap() {
        swap_stat_t *swap = get_swap_stats();

        if (swap != NULL) {
                add_stat(LONG_LONG, &swap->total, "swap", "total", NULL);
                add_stat(LONG_LONG, &swap->used, "swap", "used", NULL);
                add_stat(LONG_LONG, &swap->free, "swap", "free", NULL);
        }
}

void populate_general() {
        general_stat_t *gen = get_general_stats();

        if (gen != NULL) {
                add_stat(STRING, &gen->os_name,
                         "general", "os_name", NULL);
                add_stat(STRING, &gen->os_release,
                         "general", "os_release", NULL);
                add_stat(STRING, &gen->os_version,
                         "general", "os_version", NULL);
                add_stat(STRING, &gen->platform, "general", "platform", NULL);
                add_stat(STRING, &gen->hostname, "general", "hostname", NULL);
                add_stat(TIME_T, &gen->uptime, "general", "uptime", NULL);
        }
}

void populate_fs() {
        int n, i;
        disk_stat_t *disk = get_disk_stats(&n);

        if (disk != NULL) {
                for (i = 0; i < n; i++) {
                        /* FIXME it'd be nicer if libstatgrab did this */
                        char *buf, *name, *p;
                        const char *device = disk[i].device_name;

                        if (strcmp(device, "/") == 0)
                                device = "root";

                        buf = strdup(device);
                        if (buf == NULL)
                                die("out of memory");

                        name = buf;
                        if (strlen(name) == 2 && name[1] == ':')
                                name[1] = '\0';
                        if (strncmp(name, "/dev/", 5) == 0)
                                name += 5;
                        while ((p = strchr(name, '/')) != NULL)
                                *p = '_';

                        add_stat(STRING, &disk[i].device_name,
                                 "fs", name, "device_name", NULL);
                        add_stat(STRING, &disk[i].fs_type,
                                 "fs", name, "fs_type", NULL);
                        add_stat(STRING, &disk[i].mnt_point,
                                 "fs", name, "mnt_point", NULL);
                        add_stat(LONG_LONG, &disk[i].size,
                                 "fs", name, "size", NULL);
                        add_stat(LONG_LONG, &disk[i].used,
                                 "fs", name, "used", NULL);
                        add_stat(LONG_LONG, &disk[i].avail,
                                 "fs", name, "avail", NULL);
                        add_stat(LONG_LONG, &disk[i].total_inodes,
                                 "fs", name, "total_inodes", NULL);
                        add_stat(LONG_LONG, &disk[i].used_inodes,
                                 "fs", name, "used_inodes", NULL);
                        add_stat(LONG_LONG, &disk[i].free_inodes,
                                 "fs", name, "free_inodes", NULL);

                        free(buf);
                }
        }
}

void populate_disk() {
        int n, i;
        diskio_stat_t *diskio;

        diskio = use_diffs ? get_diskio_stats_diff(&n) : get_diskio_stats(&n);
        if (diskio != NULL) {
                for (i = 0; i < n; i++) {
                        const char *name = diskio[i].disk_name;
        
                        add_stat(STRING, &diskio[i].disk_name,
                                 "disk", name, "disk_name", NULL);
                        add_stat(LONG_LONG, &diskio[i].read_bytes,
                                 "disk", name, "read_bytes", NULL);
                        add_stat(LONG_LONG, &diskio[i].write_bytes,
                                 "disk", name, "write_bytes", NULL);
                        add_stat(TIME_T, &diskio[i].systime,
                                 "disk", name, "systime", NULL);
                }
        }
}

void populate_proc() {
        process_stat_t *proc = get_process_stats();

        if (proc != NULL) {
                add_stat(INT, &proc->total, "proc", "total", NULL);
                add_stat(INT, &proc->running, "proc", "running", NULL);
                add_stat(INT, &proc->sleeping, "proc", "sleeping", NULL);
                add_stat(INT, &proc->stopped, "proc", "stopped", NULL);
                add_stat(INT, &proc->zombie, "proc", "zombie", NULL);
        }
}

void populate_net() {
        int n, i;
        network_stat_t *net;
        network_iface_stat_t *iface;

        net = use_diffs ? get_network_stats_diff(&n) : get_network_stats(&n);
        if (net != NULL) {
                for (i = 0; i < n; i++) {
                        const char *name = net[i].interface_name;
        
                        add_stat(STRING, &net[i].interface_name,
                                 "net", name, "interface_name", NULL);
                        add_stat(LONG_LONG, &net[i].tx,
                                 "net", name, "tx", NULL);
                        add_stat(LONG_LONG, &net[i].rx,
                                 "net", name, "rx", NULL);
                        add_stat(TIME_T, &net[i].systime,
                                 "net", name, "systime", NULL);
                }
        }

        iface = get_network_iface_stats(&n);
        if (iface != NULL) {
                for (i = 0; i < n; i++) {
                        const char *name = iface[i].interface_name;

                        add_stat(INT, &iface[i].speed,
                                 "net", name, "speed", NULL);
                        add_stat(DUPLEX, &iface[i].dup,
                                 "net", name, "duplex", NULL);
                }
        }
}

void populate_page() {
        page_stat_t *page;

        page = use_diffs ? get_page_stats_diff() : get_page_stats();
        if (page != NULL) {
                add_stat(LONG_LONG, &page->pages_pagein, "page", "in", NULL);
                add_stat(LONG_LONG, &page->pages_pageout, "page", "out", NULL);
                add_stat(TIME_T, &page->systime, "page", "systime", NULL);
        }
}

typedef struct {
        const char *name;
        void (*populate)();
        int interesting;
} toplevel;
toplevel toplevels[] = {
        {"const.", populate_const, 0},
        {"cpu.", populate_cpu, 0},
        {"mem.", populate_mem, 0},
        {"load.", populate_load, 0},
        {"user.", populate_user, 0},
        {"swap.", populate_swap, 0},
        {"general.", populate_general, 0},
        {"fs.", populate_fs, 0},
        {"disk.", populate_disk, 0},
        {"proc.", populate_proc, 0},
        {"net.", populate_net, 0},
        {"page.", populate_page, 0},
        {NULL, NULL, 0}
};

/* Set the "interesting" flag on the sections that we actually need to
   fetch. */
void select_interesting(int argc, char **argv) {
        toplevel *t;

        if (argc == 0) {
                for (t = &toplevels[0]; t->name != NULL; t++)
                        t->interesting = 1;
        } else {
                int i;

                for (i = 0; i < argc; i++) {
                        for (t = &toplevels[0]; t->name != NULL; t++) {
                                if (strncmp(argv[i], t->name,
                                            strlen(t->name)) == 0) {
                                        t->interesting = 1;
                                        break;
                                }
                        }
                }
        }
}

/* Clear and rebuild the stats array. */
void get_stats() {
        toplevel *t;

        clear_stats();

        for (t = &toplevels[0]; t->name != NULL; t++) {
                if (t->interesting)
                        t->populate();
        }

        qsort(stats, num_stats, sizeof *stats, stats_compare);
}

/* Print the value of a stat. */
void print_stat_value(const stat *s) {
        void *v = s->stat;

        switch (s->type) {
        case LONG_LONG:
                printf("%lld", *(long long *)v);
                break;
        case TIME_T:
                /* FIXME option for formatted time? */
                printf("%ld", *(time_t *)v);
                break;
        case FLOAT:
                printf("%f", *(float *)v);
                break;
        case DOUBLE:
                printf("%f", *(double *)v);
                break;
        case STRING:
                /* FIXME escaping? */
                printf("%s", *(char **)v);
                break;
        case INT:
                printf("%d", *(int *)v);
                break;
        case DUPLEX:
                switch (*(statgrab_duplex *) v) {
                case FULL_DUPLEX:
                        printf("full");
                        break;
                case HALF_DUPLEX:
                        printf("half");
                        break;
                default:
                        printf("unknown");
                        break;
                }
                break;
        }
}

/* Print the name and value of a stat. */
void print_stat(const stat *s) {
        switch (display_mode) {
        case DISPLAY_LINUX:
                printf("%s = ", s->name);
                break;
        case DISPLAY_BSD:
                printf("%s: ", s->name);
                break;
        case DISPLAY_MRTG:
        case DISPLAY_PLAIN:
                break;
        }
        print_stat_value(s);
        printf("\n");
}

/* Print stats as specified on the provided command line. */
void print_stats(int argc, char **argv) {
        int i;

        if (argc == optind) {
                /* Print all stats. */
                for (i = 0; i < num_stats; i++)
                        print_stat(&stats[i]);
        } else {
                /* Print selected stats. */
                for (i = optind; i < argc; i++) {
                        char *name = argv[i];
                        stat key;
                        const stat *s, *end;
                        int (*compare)(const void *, const void *);

                        key.name = name;
                        if (name[strlen(name) - 1] == '.')
                                compare = stats_compare_prefix;
                        else
                                compare = stats_compare;

                        s = (const stat *)bsearch(&key, stats, num_stats,
                                                  sizeof *stats, compare);
                        if (s == NULL) {
                                printf("Unknown stat %s\n", name);
                                continue;
                        }

                        /* Find the range of stats the user wanted. */
                        for (; s >= stats; s--) {
                                if (compare(&key, s) != 0)
                                        break;
                        }
                        s++;
                        for (end = s; end < &stats[num_stats]; end++) {
                                if (compare(&key, end) != 0)
                                        break;
                        }

                        /* And print them. */
                        for (; s < end; s++) {
                                print_stat(s);
                        }
                }
        }
}

void usage() {
        printf("Usage: statgrab [OPTION]... [STAT]...\n"
               "Display system statistics.\n"
               "\n"
               "If no STATs are given, all will be displayed. Specify 'STAT.' to display all\n"
               "statistics starting with that prefix.\n"
               "\n");
        printf("  -l         Linux sysctl-style output (default)\n"
               "  -b         BSD sysctl-style output\n"
               "  -m         MRTG-compatible output\n"
               "  -u         Plain output (only show values)\n"
               "  -n         Display cumulative stats once (default)\n"
               "  -s         Display stat differences repeatedly\n"
               "  -o         Display stat differences once\n"
               "  -t DELAY   When repeating, wait DELAY seconds between updates (default 1)\n"
               "  -p         Display CPU usage differences as percentages rather than\n"
               "             absolute values\n"
               "\n");
        printf("Version %s - report bugs to <%s>.\n",
               PACKAGE_VERSION, PACKAGE_BUGREPORT);
        exit(1);
}

int main(int argc, char **argv) {
        opterr = 0;
        while (1) {
                int c = getopt(argc, argv, "lbmunsot:p");
                if (c == -1)
                        break;
                switch (c) {
                case 'l':
                        display_mode = DISPLAY_LINUX;
                        break;
                case 'b':
                        display_mode = DISPLAY_BSD;
                        break;
                case 'm':
                        display_mode = DISPLAY_MRTG;
                        break;
                case 'u':
                        display_mode = DISPLAY_PLAIN;
                        break;
                case 'n':
                        repeat_mode = REPEAT_NONE;
                        break;
                case 's':
                        repeat_mode = REPEAT_FOREVER;
                        break;
                case 'o':
                        repeat_mode = REPEAT_ONCE;
                        break;
                case 't':
                        repeat_time = atoi(optarg);
                        break;
                case 'p':
                        use_cpu_percent = 1;
                        break;
                default:
                        usage();
                }
        }

        if (display_mode == DISPLAY_MRTG) {
                if ((argc - optind) != 2)
                        die("mrtg mode: must specify exactly two stats");
                if (repeat_mode == REPEAT_FOREVER)
                        die("mrtg mode: cannot repeat display");
        }

        if (use_cpu_percent && repeat_mode == REPEAT_NONE)
                die("CPU percentage usage display requires stat differences");

        if (repeat_mode == REPEAT_NONE)
                use_diffs = 0;
        else
                use_diffs = 1;

        select_interesting(argc - optind, &argv[optind]);

        /* We don't care if statgrab_init fails, because we can just display
           the statistics that can be read as non-root. */
        statgrab_init();
        if (statgrab_drop_privileges() != 0)
                die("Failed to drop setuid/setgid privileges");

        switch (repeat_mode) {
        case REPEAT_NONE:
                get_stats();
                print_stats(argc, argv);
                break;
        case REPEAT_ONCE:
                get_stats();
                sleep(repeat_time);
                get_stats();
                print_stats(argc, argv);
                break;
        case REPEAT_FOREVER:
                while (1) {
                        get_stats();
                        print_stats(argc, argv);
                        printf("\n");
                        sleep(repeat_time);
                }
        }

        if (display_mode == DISPLAY_MRTG) {
                printf("\n");
                printf("statgrab\n");
        }

        return 0;
}

Revision:	1.19
Committed:	Fri Feb 13 15:13:37 2004 UTC (20 years, 8 months ago) by ats
Content type:	text/plain
Branch:	MAIN
Changes since 1.18:	+2 -2 lines
Log Message:	Track rename of duplex to statgrab_duplex.
#	User	Rev	Content
1	tdb	1.1	/*
2			* i-scream central monitoring system
3			* http://www.i-scream.org
4	tdb	1.16	* Copyright (C) 2000-2004 i-scream
5	tdb	1.1	*
6			* This program is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU General Public License
8			* as published by the Free Software Foundation; either version 2
9			* of the License, or (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19	tdb	1.17	*
20	ats	1.19	* $Id: statgrab.c,v 1.18 2004/02/13 12:52:40 ats Exp $
21	tdb	1.1	*/
22
23	tdb	1.3	#ifdef HAVE_CONFIG_H
24			#include "config.h"
25			#endif
26
27	tdb	1.1	#include <statgrab.h>
28			#include <string.h>
29			#include <stdio.h>
30			#include <stdarg.h>
31			#include <stdlib.h>
32			#include <unistd.h>
33
34			typedef enum {
35			LONG_LONG = 0,
36			TIME_T,
37			FLOAT,
38			DOUBLE,
39			STRING,
40	ats	1.18	INT,
41			DUPLEX
42	tdb	1.1	} stat_type;
43
44			typedef enum {
45			DISPLAY_LINUX = 0,
46			DISPLAY_BSD,
47			DISPLAY_MRTG,
48			DISPLAY_PLAIN
49			} display_mode_type;
50
51			typedef enum {
52			REPEAT_NONE = 0,
53			REPEAT_ONCE,
54			REPEAT_FOREVER
55			} repeat_mode_type;
56
57			typedef struct {
58			char *name;
59			stat_type type;
60			void *stat;
61			} stat;
62
63			stat *stats = NULL;
64			int num_stats = 0;
65			int alloc_stats = 0;
66			#define INCREMENT_STATS 64
67
68			display_mode_type display_mode = DISPLAY_LINUX;
69			repeat_mode_type repeat_mode = REPEAT_NONE;
70			int repeat_time = 1;
71			int use_cpu_percent = 0;
72	ats	1.8	int use_diffs = 0;
73	tdb	1.1
74			/* Exit with an error message. */
75			void die(const char *s) {
76			fprintf(stderr, "fatal: %s\n", s);
77			exit(1);
78			}
79
80			/* Remove all the recorded stats. */
81			void clear_stats() {
82			int i;
83
84			for (i = 0; i < num_stats; i++)
85			free(stats[i].name);
86			num_stats = 0;
87			}
88
89			/* Add a stat. The varargs make up the name, joined with dots; the name is
90			terminated with a NULL. */
91			void add_stat(stat_type type, void *stat, ...) {
92			va_list ap;
93			int len = 0;
94			char name, p;
95
96			/* Figure out how long the name will be, including dots and trailing
97			\0. */
98			va_start(ap, stat);
99			while (1) {
100			const char part = va_arg(ap, const char );
101			if (part == NULL)
102			break;
103			len += 1 + strlen(part);
104			}
105			va_end(ap);
106
107			/* Paste the name together. */
108			name = malloc(len);
109			if (name == NULL)
110			die("out of memory");
111			p = name;
112			va_start(ap, stat);
113			while (1) {
114			const char part = va_arg(ap, const char );
115			int partlen;
116			if (part == NULL)
117			break;
118			partlen = strlen(part);
119			memcpy(p, part, partlen);
120			p += partlen;
121			*p++ = '.';
122			}
123			va_end(ap);
124			*--p = '\0';
125
126			/* Replace spaces with underscores. */
127			for (p = name; *p != '\0'; p++) {
128			if (*p == ' ')
129			*p = '_';
130			}
131
132			/* Stretch the stats array if necessary. */
133			if (num_stats >= alloc_stats) {
134			alloc_stats += INCREMENT_STATS;
135			stats = realloc(stats, alloc_stats * sizeof *stats);
136			if (stats == NULL)
137			die("out of memory");
138			}
139
140			stats[num_stats].name = name;
141			stats[num_stats].type = type;
142			stats[num_stats].stat = stat;
143			++num_stats;
144			}
145
146	ats	1.9	/* Compare two stats by name for qsort and bsearch. */
147	tdb	1.1	int stats_compare(const void a, const void b) {
148			return strcmp(((stat )a)->name, ((stat )b)->name);
149			}
150
151	ats	1.9	/* Compare up to the length of the key for bsearch. */
152			int stats_compare_prefix(const void key, const void item) {
153			const char kn = ((stat )key)->name;
154			const char in = ((stat )item)->name;
155
156			return strncmp(kn, in, strlen(kn));
157			}
158
159	ats	1.8	void populate_const() {
160	tdb	1.1	static int zero = 0;
161
162			/* Constants, for use with MRTG mode. */
163			add_stat(INT, &zero, "const", "0", NULL);
164	ats	1.8	}
165	tdb	1.1
166	ats	1.8	void populate_cpu() {
167			if (use_cpu_percent) {
168			cpu_percent_t *cpu_p = cpu_percent_usage();
169	tdb	1.1
170			if (cpu_p != NULL) {
171			add_stat(FLOAT, &cpu_p->user,
172			"cpu", "user", NULL);
173			add_stat(FLOAT, &cpu_p->kernel,
174			"cpu", "kernel", NULL);
175			add_stat(FLOAT, &cpu_p->idle,
176			"cpu", "idle", NULL);
177			add_stat(FLOAT, &cpu_p->iowait,
178			"cpu", "iowait", NULL);
179			add_stat(FLOAT, &cpu_p->swap,
180			"cpu", "swap", NULL);
181			add_stat(FLOAT, &cpu_p->nice,
182			"cpu", "nice", NULL);
183	ats	1.7	add_stat(TIME_T, &cpu_p->time_taken,
184	tdb	1.1	"cpu", "time_taken", NULL);
185			}
186			} else {
187	ats	1.8	cpu_states_t *cpu_s;
188
189	tdb	1.1	cpu_s = use_diffs ? get_cpu_diff() : get_cpu_totals();
190			if (cpu_s != NULL) {
191			add_stat(LONG_LONG, &cpu_s->user,
192			"cpu", "user", NULL);
193			add_stat(LONG_LONG, &cpu_s->kernel,
194			"cpu", "kernel", NULL);
195			add_stat(LONG_LONG, &cpu_s->idle,
196			"cpu", "idle", NULL);
197			add_stat(LONG_LONG, &cpu_s->iowait,
198			"cpu", "iowait", NULL);
199			add_stat(LONG_LONG, &cpu_s->swap,
200			"cpu", "swap", NULL);
201			add_stat(LONG_LONG, &cpu_s->nice,
202			"cpu", "nice", NULL);
203			add_stat(LONG_LONG, &cpu_s->total,
204			"cpu", "total", NULL);
205			add_stat(TIME_T, &cpu_s->systime,
206			"cpu", "systime", NULL);
207			}
208			}
209	ats	1.8	}
210
211			void populate_mem() {
212			mem_stat_t *mem = get_memory_stats();
213	tdb	1.1
214			if (mem != NULL) {
215			add_stat(LONG_LONG, &mem->total, "mem", "total", NULL);
216			add_stat(LONG_LONG, &mem->free, "mem", "free", NULL);
217			add_stat(LONG_LONG, &mem->used, "mem", "used", NULL);
218			add_stat(LONG_LONG, &mem->cache, "mem", "cache", NULL);
219			}
220	ats	1.8	}
221
222			void populate_load() {
223			load_stat_t *load = get_load_stats();
224	tdb	1.1
225			if (load != NULL) {
226			add_stat(DOUBLE, &load->min1, "load", "min1", NULL);
227			add_stat(DOUBLE, &load->min5, "load", "min5", NULL);
228			add_stat(DOUBLE, &load->min15, "load", "min15", NULL);
229			}
230	ats	1.8	}
231
232			void populate_user() {
233			user_stat_t *user = get_user_stats();
234	tdb	1.1
235			if (user != NULL) {
236			add_stat(INT, &user->num_entries, "user", "num", NULL);
237			add_stat(STRING, &user->name_list, "user", "names", NULL);
238			}
239	ats	1.8	}
240
241			void populate_swap() {
242			swap_stat_t *swap = get_swap_stats();
243	tdb	1.1
244			if (swap != NULL) {
245			add_stat(LONG_LONG, &swap->total, "swap", "total", NULL);
246			add_stat(LONG_LONG, &swap->used, "swap", "used", NULL);
247			add_stat(LONG_LONG, &swap->free, "swap", "free", NULL);
248			}
249	ats	1.8	}
250
251			void populate_general() {
252			general_stat_t *gen = get_general_stats();
253	tdb	1.1
254			if (gen != NULL) {
255			add_stat(STRING, &gen->os_name,
256			"general", "os_name", NULL);
257			add_stat(STRING, &gen->os_release,
258			"general", "os_release", NULL);
259			add_stat(STRING, &gen->os_version,
260			"general", "os_version", NULL);
261			add_stat(STRING, &gen->platform, "general", "platform", NULL);
262			add_stat(STRING, &gen->hostname, "general", "hostname", NULL);
263			add_stat(TIME_T, &gen->uptime, "general", "uptime", NULL);
264			}
265	ats	1.8	}
266
267			void populate_fs() {
268			int n, i;
269			disk_stat_t *disk = get_disk_stats(&n);
270	tdb	1.1
271			if (disk != NULL) {
272			for (i = 0; i < n; i++) {
273			/* FIXME it'd be nicer if libstatgrab did this */
274	ats	1.10	char buf, name, *p;
275			const char *device = disk[i].device_name;
276
277			if (strcmp(device, "/") == 0)
278			device = "root";
279
280			buf = strdup(device);
281			if (buf == NULL)
282			die("out of memory");
283
284			name = buf;
285	ats	1.13	if (strlen(name) == 2 && name[1] == ':')
286			name[1] = '\0';
287	ats	1.10	if (strncmp(name, "/dev/", 5) == 0)
288			name += 5;
289			while ((p = strchr(name, '/')) != NULL)
290			*p = '_';
291
292	tdb	1.1	add_stat(STRING, &disk[i].device_name,
293			"fs", name, "device_name", NULL);
294			add_stat(STRING, &disk[i].fs_type,
295			"fs", name, "fs_type", NULL);
296			add_stat(STRING, &disk[i].mnt_point,
297			"fs", name, "mnt_point", NULL);
298			add_stat(LONG_LONG, &disk[i].size,
299			"fs", name, "size", NULL);
300			add_stat(LONG_LONG, &disk[i].used,
301			"fs", name, "used", NULL);
302			add_stat(LONG_LONG, &disk[i].avail,
303			"fs", name, "avail", NULL);
304			add_stat(LONG_LONG, &disk[i].total_inodes,
305			"fs", name, "total_inodes", NULL);
306			add_stat(LONG_LONG, &disk[i].used_inodes,
307			"fs", name, "used_inodes", NULL);
308			add_stat(LONG_LONG, &disk[i].free_inodes,
309			"fs", name, "free_inodes", NULL);
310	ats	1.10
311			free(buf);
312	tdb	1.1	}
313			}
314	ats	1.8	}
315
316			void populate_disk() {
317			int n, i;
318			diskio_stat_t *diskio;
319	tdb	1.1
320			diskio = use_diffs ? get_diskio_stats_diff(&n) : get_diskio_stats(&n);
321			if (diskio != NULL) {
322			for (i = 0; i < n; i++) {
323			const char *name = diskio[i].disk_name;
324
325			add_stat(STRING, &diskio[i].disk_name,
326			"disk", name, "disk_name", NULL);
327			add_stat(LONG_LONG, &diskio[i].read_bytes,
328			"disk", name, "read_bytes", NULL);
329			add_stat(LONG_LONG, &diskio[i].write_bytes,
330			"disk", name, "write_bytes", NULL);
331			add_stat(TIME_T, &diskio[i].systime,
332			"disk", name, "systime", NULL);
333			}
334			}
335	ats	1.8	}
336
337			void populate_proc() {
338			process_stat_t *proc = get_process_stats();
339	tdb	1.1
340			if (proc != NULL) {
341			add_stat(INT, &proc->total, "proc", "total", NULL);
342			add_stat(INT, &proc->running, "proc", "running", NULL);
343			add_stat(INT, &proc->sleeping, "proc", "sleeping", NULL);
344			add_stat(INT, &proc->stopped, "proc", "stopped", NULL);
345			add_stat(INT, &proc->zombie, "proc", "zombie", NULL);
346			}
347	ats	1.8	}
348
349			void populate_net() {
350			int n, i;
351			network_stat_t *net;
352	ats	1.18	network_iface_stat_t *iface;
353	tdb	1.1
354			net = use_diffs ? get_network_stats_diff(&n) : get_network_stats(&n);
355			if (net != NULL) {
356			for (i = 0; i < n; i++) {
357			const char *name = net[i].interface_name;
358
359			add_stat(STRING, &net[i].interface_name,
360			"net", name, "interface_name", NULL);
361			add_stat(LONG_LONG, &net[i].tx,
362			"net", name, "tx", NULL);
363			add_stat(LONG_LONG, &net[i].rx,
364			"net", name, "rx", NULL);
365			add_stat(TIME_T, &net[i].systime,
366			"net", name, "systime", NULL);
367			}
368			}
369	ats	1.18
370			iface = get_network_iface_stats(&n);
371			if (iface != NULL) {
372			for (i = 0; i < n; i++) {
373			const char *name = iface[i].interface_name;
374
375			add_stat(INT, &iface[i].speed,
376			"net", name, "speed", NULL);
377			add_stat(DUPLEX, &iface[i].dup,
378			"net", name, "duplex", NULL);
379			}
380			}
381	ats	1.8	}
382
383			void populate_page() {
384			page_stat_t *page;
385	tdb	1.1
386			page = use_diffs ? get_page_stats_diff() : get_page_stats();
387			if (page != NULL) {
388			add_stat(LONG_LONG, &page->pages_pagein, "page", "in", NULL);
389			add_stat(LONG_LONG, &page->pages_pageout, "page", "out", NULL);
390	ats	1.11	add_stat(TIME_T, &page->systime, "page", "systime", NULL);
391	tdb	1.1	}
392	ats	1.8	}
393
394			typedef struct {
395			const char *name;
396			void (*populate)();
397			int interesting;
398			} toplevel;
399			toplevel toplevels[] = {
400			{"const.", populate_const, 0},
401			{"cpu.", populate_cpu, 0},
402			{"mem.", populate_mem, 0},
403			{"load.", populate_load, 0},
404			{"user.", populate_user, 0},
405			{"swap.", populate_swap, 0},
406			{"general.", populate_general, 0},
407			{"fs.", populate_fs, 0},
408			{"disk.", populate_disk, 0},
409			{"proc.", populate_proc, 0},
410			{"net.", populate_net, 0},
411			{"page.", populate_page, 0},
412			{NULL, NULL, 0}
413			};
414
415			/* Set the "interesting" flag on the sections that we actually need to
416			fetch. */
417			void select_interesting(int argc, char **argv) {
418			toplevel *t;
419
420			if (argc == 0) {
421			for (t = &toplevels[0]; t->name != NULL; t++)
422			t->interesting = 1;
423			} else {
424			int i;
425
426			for (i = 0; i < argc; i++) {
427			for (t = &toplevels[0]; t->name != NULL; t++) {
428			if (strncmp(argv[i], t->name,
429			strlen(t->name)) == 0) {
430			t->interesting = 1;
431			break;
432			}
433			}
434			}
435			}
436			}
437
438			/* Clear and rebuild the stats array. */
439			void get_stats() {
440			toplevel *t;
441
442			clear_stats();
443
444			for (t = &toplevels[0]; t->name != NULL; t++) {
445			if (t->interesting)
446			t->populate();
447			}
448	tdb	1.1
449			qsort(stats, num_stats, sizeof *stats, stats_compare);
450			}
451
452			/* Print the value of a stat. */
453			void print_stat_value(const stat *s) {
454			void *v = s->stat;
455
456			switch (s->type) {
457			case LONG_LONG:
458			printf("%lld", (long long )v);
459			break;
460			case TIME_T:
461			/* FIXME option for formatted time? */
462			printf("%ld", (time_t )v);
463			break;
464			case FLOAT:
465			printf("%f", (float )v);
466			break;
467			case DOUBLE:
468			printf("%f", (double )v);
469			break;
470			case STRING:
471			/* FIXME escaping? */
472			printf("%s", (char *)v);
473			break;
474			case INT:
475			printf("%d", (int )v);
476	ats	1.18	break;
477			case DUPLEX:
478	ats	1.19	switch ((statgrab_duplex ) v) {
479	ats	1.18	case FULL_DUPLEX:
480			printf("full");
481			break;
482			case HALF_DUPLEX:
483			printf("half");
484			break;
485			default:
486			printf("unknown");
487			break;
488			}
489	tdb	1.1	break;
490			}
491			}
492
493			/* Print the name and value of a stat. */
494			void print_stat(const stat *s) {
495			switch (display_mode) {
496			case DISPLAY_LINUX:
497			printf("%s = ", s->name);
498			break;
499			case DISPLAY_BSD:
500			printf("%s: ", s->name);
501			break;
502			case DISPLAY_MRTG:
503			case DISPLAY_PLAIN:
504			break;
505			}
506			print_stat_value(s);
507			printf("\n");
508			}
509
510			/* Print stats as specified on the provided command line. */
511			void print_stats(int argc, char **argv) {
512			int i;
513
514			if (argc == optind) {
515			/* Print all stats. */
516			for (i = 0; i < num_stats; i++)
517			print_stat(&stats[i]);
518			} else {
519			/* Print selected stats. */
520			for (i = optind; i < argc; i++) {
521	ats	1.9	char *name = argv[i];
522	tdb	1.1	stat key;
523	ats	1.9	const stat s, end;
524			int (compare)(const void , const void *);
525
526			key.name = name;
527			if (name[strlen(name) - 1] == '.')
528			compare = stats_compare_prefix;
529			else
530			compare = stats_compare;
531	tdb	1.1
532			s = (const stat *)bsearch(&key, stats, num_stats,
533	ats	1.9	sizeof *stats, compare);
534			if (s == NULL) {
535			printf("Unknown stat %s\n", name);
536			continue;
537			}
538
539			/* Find the range of stats the user wanted. */
540			for (; s >= stats; s--) {
541			if (compare(&key, s) != 0)
542			break;
543			}
544			s++;
545			for (end = s; end < &stats[num_stats]; end++) {
546			if (compare(&key, end) != 0)
547			break;
548			}
549
550			/* And print them. */
551			for (; s < end; s++) {
552	tdb	1.1	print_stat(s);
553			}
554			}
555			}
556			}
557
558			void usage() {
559			printf("Usage: statgrab [OPTION]... [STAT]...\n"
560	ats	1.9	"Display system statistics.\n"
561			"\n"
562			"If no STATs are given, all will be displayed. Specify 'STAT.' to display all\n"
563			"statistics starting with that prefix.\n"
564	tdb	1.1	"\n");
565			printf(" -l Linux sysctl-style output (default)\n"
566			" -b BSD sysctl-style output\n"
567			" -m MRTG-compatible output\n"
568			" -u Plain output (only show values)\n"
569			" -n Display cumulative stats once (default)\n"
570			" -s Display stat differences repeatedly\n"
571			" -o Display stat differences once\n"
572			" -t DELAY When repeating, wait DELAY seconds between updates (default 1)\n"
573	ats	1.5	" -p Display CPU usage differences as percentages rather than\n"
574			" absolute values\n"
575	tdb	1.1	"\n");
576	tdb	1.2	printf("Version %s - report bugs to <%s>.\n",
577	ats	1.5	PACKAGE_VERSION, PACKAGE_BUGREPORT);
578	tdb	1.1	exit(1);
579			}
580
581			int main(int argc, char **argv) {
582			opterr = 0;
583			while (1) {
584			int c = getopt(argc, argv, "lbmunsot:p");
585			if (c == -1)
586			break;
587			switch (c) {
588			case 'l':
589			display_mode = DISPLAY_LINUX;
590			break;
591			case 'b':
592			display_mode = DISPLAY_BSD;
593			break;
594			case 'm':
595			display_mode = DISPLAY_MRTG;
596			break;
597			case 'u':
598			display_mode = DISPLAY_PLAIN;
599			break;
600			case 'n':
601			repeat_mode = REPEAT_NONE;
602			break;
603			case 's':
604			repeat_mode = REPEAT_FOREVER;
605			break;
606			case 'o':
607			repeat_mode = REPEAT_ONCE;
608			break;
609			case 't':
610			repeat_time = atoi(optarg);
611			break;
612			case 'p':
613			use_cpu_percent = 1;
614			break;
615			default:
616			usage();
617			}
618			}
619
620			if (display_mode == DISPLAY_MRTG) {
621			if ((argc - optind) != 2)
622			die("mrtg mode: must specify exactly two stats");
623	ats	1.5	if (repeat_mode == REPEAT_FOREVER)
624	tdb	1.1	die("mrtg mode: cannot repeat display");
625			}
626	ats	1.5
627			if (use_cpu_percent && repeat_mode == REPEAT_NONE)
628			die("CPU percentage usage display requires stat differences");
629	tdb	1.1
630	ats	1.8	if (repeat_mode == REPEAT_NONE)
631			use_diffs = 0;
632			else
633			use_diffs = 1;
634
635			select_interesting(argc - optind, &argv[optind]);
636
637	ats	1.12	/* We don't care if statgrab_init fails, because we can just display
638			the statistics that can be read as non-root. */
639			statgrab_init();
640	ats	1.15	if (statgrab_drop_privileges() != 0)
641			die("Failed to drop setuid/setgid privileges");
642	ats	1.12
643	tdb	1.1	switch (repeat_mode) {
644			case REPEAT_NONE:
645	ats	1.8	get_stats();
646	tdb	1.1	print_stats(argc, argv);
647			break;
648			case REPEAT_ONCE:
649	ats	1.8	get_stats();
650	tdb	1.1	sleep(repeat_time);
651	ats	1.8	get_stats();
652	tdb	1.1	print_stats(argc, argv);
653			break;
654			case REPEAT_FOREVER:
655			while (1) {
656	ats	1.8	get_stats();
657	tdb	1.1	print_stats(argc, argv);
658			printf("\n");
659			sleep(repeat_time);
660			}
661			}
662
663			if (display_mode == DISPLAY_MRTG) {
664			printf("\n");
665			printf("statgrab\n");
666			}
667
668			return 0;
669			}
670