src/statgrab/statgrab.c

/* 
 * i-scream central monitoring system
 * http://www.i-scream.org
 * Copyright (C) 2000-2003 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.
 */

#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
} 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;

/* 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);
        free(stats);
        stats = NULL;
        num_stats = 0;
        alloc_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 sorting purposes. */
int stats_compare(const void *a, const void *b) {
        return strcmp(((stat *)a)->name, ((stat *)b)->name);
}

/* Clear and rebuild the stats array. */
void get_stats(int use_diffs) {
        cpu_states_t *cpu_s;
        cpu_percent_t *cpu_p;
        mem_stat_t *mem;
        load_stat_t *load;
        user_stat_t *user;
        swap_stat_t *swap;
        general_stat_t *gen;
        disk_stat_t *disk;
        diskio_stat_t *diskio;
        process_stat_t *proc;
        network_stat_t *net;
        page_stat_t *page;
        static int zero = 0;
        int n, i;

        clear_stats();

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

        /* FIXME when only fetching some stats, it'd be more efficient to only
           do the libstatgrab calls needed, rather than fetching everything. */

        if (use_cpu_percent) {
                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_s->systime,
                                 "cpu", "time_taken", NULL);
                }
        } else {
                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);
                }
        }

        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);
        }

        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);
        }

        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);
        }

        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);
        }

        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);
        }

        disk = get_disk_stats(&n);
        if (disk != NULL) {
                for (i = 0; i < n; i++) {
                        /* FIXME it'd be nicer if libstatgrab did this */
                        const char *name = disk[i].device_name,
                                   *p = strrchr(name, '/');
                        if (p != NULL)
                                name = p + 1;
                        if (*name == '\0')
                                name = "root";
        
                        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);
                }
        }

        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);
                }
        }

        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);
        }

        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);
                }
        }

        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(LONG_LONG, &page->systime, "page", "systime", NULL);
        }

        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;
        }
}

/* 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++) {
                        stat key;
                        const stat *s;

                        key.name = argv[i];
                        s = (const stat *)bsearch(&key, stats, num_stats,
                                                  sizeof *stats,
                                                  stats_compare);
                        if (s != NULL) {
                                print_stat(s);
                        }
                }
        }
}

void usage() {
        printf("Usage: statgrab [OPTION]... [STAT]...\n"
               "Display system statistics (all statistics by default).\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 as percentages rather than absolute values\n"
               "\n");
        printf("Report bugs to <bugs@i-scream.org>.\n");
        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_NONE)
                        die("mrtg mode: cannot repeat display");
        }

        switch (repeat_mode) {
        case REPEAT_NONE:
                get_stats(0);
                print_stats(argc, argv);
                break;
        case REPEAT_ONCE:
                get_stats(1);
                sleep(repeat_time);
                get_stats(1);
                print_stats(argc, argv);
                break;
        case REPEAT_FOREVER:
                while (1) {
                        get_stats(1);
                        print_stats(argc, argv);
                        printf("\n");
                        sleep(repeat_time);
                }
        }

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

        return 0;
}

Revision:	1.1
Committed:	Tue Aug 26 12:09:44 2003 UTC (21 years, 2 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
Log Message:	A sysctl-style program to display system statistics collected through libstatgrab. Contributed by Adam Sampson, azz@us-lot.org.
#	User	Rev	Content
1	tdb	1.1	/*
2			* i-scream central monitoring system
3			* http://www.i-scream.org
4			* Copyright (C) 2000-2003 i-scream
5			*
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			*/
20
21			#include <statgrab.h>
22			#include <string.h>
23			#include <stdio.h>
24			#include <stdarg.h>
25			#include <stdlib.h>
26			#include <unistd.h>
27
28			typedef enum {
29			LONG_LONG = 0,
30			TIME_T,
31			FLOAT,
32			DOUBLE,
33			STRING,
34			INT
35			} stat_type;
36
37			typedef enum {
38			DISPLAY_LINUX = 0,
39			DISPLAY_BSD,
40			DISPLAY_MRTG,
41			DISPLAY_PLAIN
42			} display_mode_type;
43
44			typedef enum {
45			REPEAT_NONE = 0,
46			REPEAT_ONCE,
47			REPEAT_FOREVER
48			} repeat_mode_type;
49
50			typedef struct {
51			char *name;
52			stat_type type;
53			void *stat;
54			} stat;
55
56			stat *stats = NULL;
57			int num_stats = 0;
58			int alloc_stats = 0;
59			#define INCREMENT_STATS 64
60
61			display_mode_type display_mode = DISPLAY_LINUX;
62			repeat_mode_type repeat_mode = REPEAT_NONE;
63			int repeat_time = 1;
64			int use_cpu_percent = 0;
65
66			/* Exit with an error message. */
67			void die(const char *s) {
68			fprintf(stderr, "fatal: %s\n", s);
69			exit(1);
70			}
71
72			/* Remove all the recorded stats. */
73			void clear_stats() {
74			int i;
75
76			for (i = 0; i < num_stats; i++)
77			free(stats[i].name);
78			free(stats);
79			stats = NULL;
80			num_stats = 0;
81			alloc_stats = 0;
82			}
83
84			/* Add a stat. The varargs make up the name, joined with dots; the name is
85			terminated with a NULL. */
86			void add_stat(stat_type type, void *stat, ...) {
87			va_list ap;
88			int len = 0;
89			char name, p;
90
91			/* Figure out how long the name will be, including dots and trailing
92			\0. */
93			va_start(ap, stat);
94			while (1) {
95			const char part = va_arg(ap, const char );
96			if (part == NULL)
97			break;
98			len += 1 + strlen(part);
99			}
100			va_end(ap);
101
102			/* Paste the name together. */
103			name = malloc(len);
104			if (name == NULL)
105			die("out of memory");
106			p = name;
107			va_start(ap, stat);
108			while (1) {
109			const char part = va_arg(ap, const char );
110			int partlen;
111			if (part == NULL)
112			break;
113			partlen = strlen(part);
114			memcpy(p, part, partlen);
115			p += partlen;
116			*p++ = '.';
117			}
118			va_end(ap);
119			*--p = '\0';
120
121			/* Replace spaces with underscores. */
122			for (p = name; *p != '\0'; p++) {
123			if (*p == ' ')
124			*p = '_';
125			}
126
127			/* Stretch the stats array if necessary. */
128			if (num_stats >= alloc_stats) {
129			alloc_stats += INCREMENT_STATS;
130			stats = realloc(stats, alloc_stats * sizeof *stats);
131			if (stats == NULL)
132			die("out of memory");
133			}
134
135			stats[num_stats].name = name;
136			stats[num_stats].type = type;
137			stats[num_stats].stat = stat;
138			++num_stats;
139			}
140
141			/* Compare two stats by name, for sorting purposes. */
142			int stats_compare(const void a, const void b) {
143			return strcmp(((stat )a)->name, ((stat )b)->name);
144			}
145
146			/* Clear and rebuild the stats array. */
147			void get_stats(int use_diffs) {
148			cpu_states_t *cpu_s;
149			cpu_percent_t *cpu_p;
150			mem_stat_t *mem;
151			load_stat_t *load;
152			user_stat_t *user;
153			swap_stat_t *swap;
154			general_stat_t *gen;
155			disk_stat_t *disk;
156			diskio_stat_t *diskio;
157			process_stat_t *proc;
158			network_stat_t *net;
159			page_stat_t *page;
160			static int zero = 0;
161			int n, i;
162
163			clear_stats();
164
165			/* Constants, for use with MRTG mode. */
166			add_stat(INT, &zero, "const", "0", NULL);
167
168			/* FIXME when only fetching some stats, it'd be more efficient to only
169			do the libstatgrab calls needed, rather than fetching everything. */
170
171			if (use_cpu_percent) {
172			cpu_p = cpu_percent_usage();
173			if (cpu_p != NULL) {
174			add_stat(FLOAT, &cpu_p->user,
175			"cpu", "user", NULL);
176			add_stat(FLOAT, &cpu_p->kernel,
177			"cpu", "kernel", NULL);
178			add_stat(FLOAT, &cpu_p->idle,
179			"cpu", "idle", NULL);
180			add_stat(FLOAT, &cpu_p->iowait,
181			"cpu", "iowait", NULL);
182			add_stat(FLOAT, &cpu_p->swap,
183			"cpu", "swap", NULL);
184			add_stat(FLOAT, &cpu_p->nice,
185			"cpu", "nice", NULL);
186			add_stat(TIME_T, &cpu_s->systime,
187			"cpu", "time_taken", NULL);
188			}
189			} else {
190			cpu_s = use_diffs ? get_cpu_diff() : get_cpu_totals();
191			if (cpu_s != NULL) {
192			add_stat(LONG_LONG, &cpu_s->user,
193			"cpu", "user", NULL);
194			add_stat(LONG_LONG, &cpu_s->kernel,
195			"cpu", "kernel", NULL);
196			add_stat(LONG_LONG, &cpu_s->idle,
197			"cpu", "idle", NULL);
198			add_stat(LONG_LONG, &cpu_s->iowait,
199			"cpu", "iowait", NULL);
200			add_stat(LONG_LONG, &cpu_s->swap,
201			"cpu", "swap", NULL);
202			add_stat(LONG_LONG, &cpu_s->nice,
203			"cpu", "nice", NULL);
204			add_stat(LONG_LONG, &cpu_s->total,
205			"cpu", "total", NULL);
206			add_stat(TIME_T, &cpu_s->systime,
207			"cpu", "systime", NULL);
208			}
209			}
210
211			mem = get_memory_stats();
212			if (mem != NULL) {
213			add_stat(LONG_LONG, &mem->total, "mem", "total", NULL);
214			add_stat(LONG_LONG, &mem->free, "mem", "free", NULL);
215			add_stat(LONG_LONG, &mem->used, "mem", "used", NULL);
216			add_stat(LONG_LONG, &mem->cache, "mem", "cache", NULL);
217			}
218
219			load = get_load_stats();
220			if (load != NULL) {
221			add_stat(DOUBLE, &load->min1, "load", "min1", NULL);
222			add_stat(DOUBLE, &load->min5, "load", "min5", NULL);
223			add_stat(DOUBLE, &load->min15, "load", "min15", NULL);
224			}
225
226			user = get_user_stats();
227			if (user != NULL) {
228			add_stat(INT, &user->num_entries, "user", "num", NULL);
229			add_stat(STRING, &user->name_list, "user", "names", NULL);
230			}
231
232			swap = get_swap_stats();
233			if (swap != NULL) {
234			add_stat(LONG_LONG, &swap->total, "swap", "total", NULL);
235			add_stat(LONG_LONG, &swap->used, "swap", "used", NULL);
236			add_stat(LONG_LONG, &swap->free, "swap", "free", NULL);
237			}
238
239			gen = get_general_stats();
240			if (gen != NULL) {
241			add_stat(STRING, &gen->os_name,
242			"general", "os_name", NULL);
243			add_stat(STRING, &gen->os_release,
244			"general", "os_release", NULL);
245			add_stat(STRING, &gen->os_version,
246			"general", "os_version", NULL);
247			add_stat(STRING, &gen->platform, "general", "platform", NULL);
248			add_stat(STRING, &gen->hostname, "general", "hostname", NULL);
249			add_stat(TIME_T, &gen->uptime, "general", "uptime", NULL);
250			}
251
252			disk = get_disk_stats(&n);
253			if (disk != NULL) {
254			for (i = 0; i < n; i++) {
255			/* FIXME it'd be nicer if libstatgrab did this */
256			const char *name = disk[i].device_name,
257			*p = strrchr(name, '/');
258			if (p != NULL)
259			name = p + 1;
260			if (*name == '\0')
261			name = "root";
262
263			add_stat(STRING, &disk[i].device_name,
264			"fs", name, "device_name", NULL);
265			add_stat(STRING, &disk[i].fs_type,
266			"fs", name, "fs_type", NULL);
267			add_stat(STRING, &disk[i].mnt_point,
268			"fs", name, "mnt_point", NULL);
269			add_stat(LONG_LONG, &disk[i].size,
270			"fs", name, "size", NULL);
271			add_stat(LONG_LONG, &disk[i].used,
272			"fs", name, "used", NULL);
273			add_stat(LONG_LONG, &disk[i].avail,
274			"fs", name, "avail", NULL);
275			add_stat(LONG_LONG, &disk[i].total_inodes,
276			"fs", name, "total_inodes", NULL);
277			add_stat(LONG_LONG, &disk[i].used_inodes,
278			"fs", name, "used_inodes", NULL);
279			add_stat(LONG_LONG, &disk[i].free_inodes,
280			"fs", name, "free_inodes", NULL);
281			}
282			}
283
284			diskio = use_diffs ? get_diskio_stats_diff(&n) : get_diskio_stats(&n);
285			if (diskio != NULL) {
286			for (i = 0; i < n; i++) {
287			const char *name = diskio[i].disk_name;
288
289			add_stat(STRING, &diskio[i].disk_name,
290			"disk", name, "disk_name", NULL);
291			add_stat(LONG_LONG, &diskio[i].read_bytes,
292			"disk", name, "read_bytes", NULL);
293			add_stat(LONG_LONG, &diskio[i].write_bytes,
294			"disk", name, "write_bytes", NULL);
295			add_stat(TIME_T, &diskio[i].systime,
296			"disk", name, "systime", NULL);
297			}
298			}
299
300			proc = get_process_stats();
301			if (proc != NULL) {
302			add_stat(INT, &proc->total, "proc", "total", NULL);
303			add_stat(INT, &proc->running, "proc", "running", NULL);
304			add_stat(INT, &proc->sleeping, "proc", "sleeping", NULL);
305			add_stat(INT, &proc->stopped, "proc", "stopped", NULL);
306			add_stat(INT, &proc->zombie, "proc", "zombie", NULL);
307			}
308
309			net = use_diffs ? get_network_stats_diff(&n) : get_network_stats(&n);
310			if (net != NULL) {
311			for (i = 0; i < n; i++) {
312			const char *name = net[i].interface_name;
313
314			add_stat(STRING, &net[i].interface_name,
315			"net", name, "interface_name", NULL);
316			add_stat(LONG_LONG, &net[i].tx,
317			"net", name, "tx", NULL);
318			add_stat(LONG_LONG, &net[i].rx,
319			"net", name, "rx", NULL);
320			add_stat(TIME_T, &net[i].systime,
321			"net", name, "systime", NULL);
322			}
323			}
324
325			page = use_diffs ? get_page_stats_diff() : get_page_stats();
326			if (page != NULL) {
327			add_stat(LONG_LONG, &page->pages_pagein, "page", "in", NULL);
328			add_stat(LONG_LONG, &page->pages_pageout, "page", "out", NULL);
329			add_stat(LONG_LONG, &page->systime, "page", "systime", NULL);
330			}
331
332			qsort(stats, num_stats, sizeof *stats, stats_compare);
333			}
334
335			/* Print the value of a stat. */
336			void print_stat_value(const stat *s) {
337			void *v = s->stat;
338
339			switch (s->type) {
340			case LONG_LONG:
341			printf("%lld", (long long )v);
342			break;
343			case TIME_T:
344			/* FIXME option for formatted time? */
345			printf("%ld", (time_t )v);
346			break;
347			case FLOAT:
348			printf("%f", (float )v);
349			break;
350			case DOUBLE:
351			printf("%f", (double )v);
352			break;
353			case STRING:
354			/* FIXME escaping? */
355			printf("%s", (char *)v);
356			break;
357			case INT:
358			printf("%d", (int )v);
359			break;
360			}
361			}
362
363			/* Print the name and value of a stat. */
364			void print_stat(const stat *s) {
365			switch (display_mode) {
366			case DISPLAY_LINUX:
367			printf("%s = ", s->name);
368			break;
369			case DISPLAY_BSD:
370			printf("%s: ", s->name);
371			break;
372			case DISPLAY_MRTG:
373			case DISPLAY_PLAIN:
374			break;
375			}
376			print_stat_value(s);
377			printf("\n");
378			}
379
380			/* Print stats as specified on the provided command line. */
381			void print_stats(int argc, char **argv) {
382			int i;
383
384			if (argc == optind) {
385			/* Print all stats. */
386			for (i = 0; i < num_stats; i++)
387			print_stat(&stats[i]);
388			} else {
389			/* Print selected stats. */
390			for (i = optind; i < argc; i++) {
391			stat key;
392			const stat *s;
393
394			key.name = argv[i];
395			s = (const stat *)bsearch(&key, stats, num_stats,
396			sizeof *stats,
397			stats_compare);
398			if (s != NULL) {
399			print_stat(s);
400			}
401			}
402			}
403			}
404
405			void usage() {
406			printf("Usage: statgrab [OPTION]... [STAT]...\n"
407			"Display system statistics (all statistics by default).\n"
408			"\n");
409			printf(" -l Linux sysctl-style output (default)\n"
410			" -b BSD sysctl-style output\n"
411			" -m MRTG-compatible output\n"
412			" -u Plain output (only show values)\n"
413			" -n Display cumulative stats once (default)\n"
414			" -s Display stat differences repeatedly\n"
415			" -o Display stat differences once\n"
416			" -t DELAY When repeating, wait DELAY seconds between updates (default 1)\n"
417			" -p Display CPU usage as percentages rather than absolute values\n"
418			"\n");
419			printf("Report bugs to <bugs@i-scream.org>.\n");
420			exit(1);
421			}
422
423			int main(int argc, char **argv) {
424			opterr = 0;
425			while (1) {
426			int c = getopt(argc, argv, "lbmunsot:p");
427			if (c == -1)
428			break;
429			switch (c) {
430			case 'l':
431			display_mode = DISPLAY_LINUX;
432			break;
433			case 'b':
434			display_mode = DISPLAY_BSD;
435			break;
436			case 'm':
437			display_mode = DISPLAY_MRTG;
438			break;
439			case 'u':
440			display_mode = DISPLAY_PLAIN;
441			break;
442			case 'n':
443			repeat_mode = REPEAT_NONE;
444			break;
445			case 's':
446			repeat_mode = REPEAT_FOREVER;
447			break;
448			case 'o':
449			repeat_mode = REPEAT_ONCE;
450			break;
451			case 't':
452			repeat_time = atoi(optarg);
453			break;
454			case 'p':
455			use_cpu_percent = 1;
456			break;
457			default:
458			usage();
459			}
460			}
461
462			if (display_mode == DISPLAY_MRTG) {
463			if ((argc - optind) != 2)
464			die("mrtg mode: must specify exactly two stats");
465			if (repeat_mode != REPEAT_NONE)
466			die("mrtg mode: cannot repeat display");
467			}
468
469			switch (repeat_mode) {
470			case REPEAT_NONE:
471			get_stats(0);
472			print_stats(argc, argv);
473			break;
474			case REPEAT_ONCE:
475			get_stats(1);
476			sleep(repeat_time);
477			get_stats(1);
478			print_stats(argc, argv);
479			break;
480			case REPEAT_FOREVER:
481			while (1) {
482			get_stats(1);
483			print_stats(argc, argv);
484			printf("\n");
485			sleep(repeat_time);
486			}
487			}
488
489			if (display_mode == DISPLAY_MRTG) {
490			printf("\n");
491			printf("statgrab\n");
492			}
493
494			return 0;
495			}
496