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 1.20 2004/02/14 00:06:00 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,
        BOOL,
        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(BOOL, &iface[i].up,
                                 "net", name, "up", 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();
        }

        if (stats != 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;
        case BOOL:
                printf("%s", *(int *)v ? "true" : "false");
                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;

                        if (stats == NULL) {
                                s = NULL;
                        } else {
                                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:	1.21
Committed:	Wed Feb 18 17:29:15 2004 UTC (20 years, 10 months ago) by ats
Content type:	text/plain
Branch:	MAIN
Changes since 1.20:	+12 -4 lines
Log Message:	Buggy Solaris qsort/bsearch still try to access the array if the length is zero.
#	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	1.21	* $Id: statgrab.c,v 1.20 2004/02/14 00:06:00 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	ats	1.20	BOOL,
42	ats	1.18	DUPLEX
43	tdb	1.1	} stat_type;
44
45			typedef enum {
46			DISPLAY_LINUX = 0,
47			DISPLAY_BSD,
48			DISPLAY_MRTG,
49			DISPLAY_PLAIN
50			} display_mode_type;
51
52			typedef enum {
53			REPEAT_NONE = 0,
54			REPEAT_ONCE,
55			REPEAT_FOREVER
56			} repeat_mode_type;
57
58			typedef struct {
59			char *name;
60			stat_type type;
61			void *stat;
62			} stat;
63
64			stat *stats = NULL;
65			int num_stats = 0;
66			int alloc_stats = 0;
67			#define INCREMENT_STATS 64
68
69			display_mode_type display_mode = DISPLAY_LINUX;
70			repeat_mode_type repeat_mode = REPEAT_NONE;
71			int repeat_time = 1;
72			int use_cpu_percent = 0;
73	ats	1.8	int use_diffs = 0;
74	tdb	1.1
75			/* Exit with an error message. */
76			void die(const char *s) {
77			fprintf(stderr, "fatal: %s\n", s);
78			exit(1);
79			}
80
81			/* Remove all the recorded stats. */
82			void clear_stats() {
83			int i;
84
85			for (i = 0; i < num_stats; i++)
86			free(stats[i].name);
87			num_stats = 0;
88			}
89
90			/* Add a stat. The varargs make up the name, joined with dots; the name is
91			terminated with a NULL. */
92			void add_stat(stat_type type, void *stat, ...) {
93			va_list ap;
94			int len = 0;
95			char name, p;
96
97			/* Figure out how long the name will be, including dots and trailing
98			\0. */
99			va_start(ap, stat);
100			while (1) {
101			const char part = va_arg(ap, const char );
102			if (part == NULL)
103			break;
104			len += 1 + strlen(part);
105			}
106			va_end(ap);
107
108			/* Paste the name together. */
109			name = malloc(len);
110			if (name == NULL)
111			die("out of memory");
112			p = name;
113			va_start(ap, stat);
114			while (1) {
115			const char part = va_arg(ap, const char );
116			int partlen;
117			if (part == NULL)
118			break;
119			partlen = strlen(part);
120			memcpy(p, part, partlen);
121			p += partlen;
122			*p++ = '.';
123			}
124			va_end(ap);
125			*--p = '\0';
126
127			/* Replace spaces with underscores. */
128			for (p = name; *p != '\0'; p++) {
129			if (*p == ' ')
130			*p = '_';
131			}
132
133			/* Stretch the stats array if necessary. */
134			if (num_stats >= alloc_stats) {
135			alloc_stats += INCREMENT_STATS;
136			stats = realloc(stats, alloc_stats * sizeof *stats);
137			if (stats == NULL)
138			die("out of memory");
139			}
140
141			stats[num_stats].name = name;
142			stats[num_stats].type = type;
143			stats[num_stats].stat = stat;
144			++num_stats;
145			}
146
147	ats	1.9	/* Compare two stats by name for qsort and bsearch. */
148	tdb	1.1	int stats_compare(const void a, const void b) {
149			return strcmp(((stat )a)->name, ((stat )b)->name);
150			}
151
152	ats	1.9	/* Compare up to the length of the key for bsearch. */
153			int stats_compare_prefix(const void key, const void item) {
154			const char kn = ((stat )key)->name;
155			const char in = ((stat )item)->name;
156
157			return strncmp(kn, in, strlen(kn));
158			}
159
160	ats	1.8	void populate_const() {
161	tdb	1.1	static int zero = 0;
162
163			/* Constants, for use with MRTG mode. */
164			add_stat(INT, &zero, "const", "0", NULL);
165	ats	1.8	}
166	tdb	1.1
167	ats	1.8	void populate_cpu() {
168			if (use_cpu_percent) {
169			cpu_percent_t *cpu_p = cpu_percent_usage();
170	tdb	1.1
171			if (cpu_p != NULL) {
172			add_stat(FLOAT, &cpu_p->user,
173			"cpu", "user", NULL);
174			add_stat(FLOAT, &cpu_p->kernel,
175			"cpu", "kernel", NULL);
176			add_stat(FLOAT, &cpu_p->idle,
177			"cpu", "idle", NULL);
178			add_stat(FLOAT, &cpu_p->iowait,
179			"cpu", "iowait", NULL);
180			add_stat(FLOAT, &cpu_p->swap,
181			"cpu", "swap", NULL);
182			add_stat(FLOAT, &cpu_p->nice,
183			"cpu", "nice", NULL);
184	ats	1.7	add_stat(TIME_T, &cpu_p->time_taken,
185	tdb	1.1	"cpu", "time_taken", NULL);
186			}
187			} else {
188	ats	1.8	cpu_states_t *cpu_s;
189
190	tdb	1.1	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	ats	1.8	}
211
212			void populate_mem() {
213			mem_stat_t *mem = get_memory_stats();
214	tdb	1.1
215			if (mem != NULL) {
216			add_stat(LONG_LONG, &mem->total, "mem", "total", NULL);
217			add_stat(LONG_LONG, &mem->free, "mem", "free", NULL);
218			add_stat(LONG_LONG, &mem->used, "mem", "used", NULL);
219			add_stat(LONG_LONG, &mem->cache, "mem", "cache", NULL);
220			}
221	ats	1.8	}
222
223			void populate_load() {
224			load_stat_t *load = get_load_stats();
225	tdb	1.1
226			if (load != NULL) {
227			add_stat(DOUBLE, &load->min1, "load", "min1", NULL);
228			add_stat(DOUBLE, &load->min5, "load", "min5", NULL);
229			add_stat(DOUBLE, &load->min15, "load", "min15", NULL);
230			}
231	ats	1.8	}
232
233			void populate_user() {
234			user_stat_t *user = get_user_stats();
235	tdb	1.1
236			if (user != NULL) {
237			add_stat(INT, &user->num_entries, "user", "num", NULL);
238			add_stat(STRING, &user->name_list, "user", "names", NULL);
239			}
240	ats	1.8	}
241
242			void populate_swap() {
243			swap_stat_t *swap = get_swap_stats();
244	tdb	1.1
245			if (swap != NULL) {
246			add_stat(LONG_LONG, &swap->total, "swap", "total", NULL);
247			add_stat(LONG_LONG, &swap->used, "swap", "used", NULL);
248			add_stat(LONG_LONG, &swap->free, "swap", "free", NULL);
249			}
250	ats	1.8	}
251
252			void populate_general() {
253			general_stat_t *gen = get_general_stats();
254	tdb	1.1
255			if (gen != NULL) {
256			add_stat(STRING, &gen->os_name,
257			"general", "os_name", NULL);
258			add_stat(STRING, &gen->os_release,
259			"general", "os_release", NULL);
260			add_stat(STRING, &gen->os_version,
261			"general", "os_version", NULL);
262			add_stat(STRING, &gen->platform, "general", "platform", NULL);
263			add_stat(STRING, &gen->hostname, "general", "hostname", NULL);
264			add_stat(TIME_T, &gen->uptime, "general", "uptime", NULL);
265			}
266	ats	1.8	}
267
268			void populate_fs() {
269			int n, i;
270			disk_stat_t *disk = get_disk_stats(&n);
271	tdb	1.1
272			if (disk != NULL) {
273			for (i = 0; i < n; i++) {
274			/* FIXME it'd be nicer if libstatgrab did this */
275	ats	1.10	char buf, name, *p;
276			const char *device = disk[i].device_name;
277
278			if (strcmp(device, "/") == 0)
279			device = "root";
280
281			buf = strdup(device);
282			if (buf == NULL)
283			die("out of memory");
284
285			name = buf;
286	ats	1.13	if (strlen(name) == 2 && name[1] == ':')
287			name[1] = '\0';
288	ats	1.10	if (strncmp(name, "/dev/", 5) == 0)
289			name += 5;
290			while ((p = strchr(name, '/')) != NULL)
291			*p = '_';
292
293	tdb	1.1	add_stat(STRING, &disk[i].device_name,
294			"fs", name, "device_name", NULL);
295			add_stat(STRING, &disk[i].fs_type,
296			"fs", name, "fs_type", NULL);
297			add_stat(STRING, &disk[i].mnt_point,
298			"fs", name, "mnt_point", NULL);
299			add_stat(LONG_LONG, &disk[i].size,
300			"fs", name, "size", NULL);
301			add_stat(LONG_LONG, &disk[i].used,
302			"fs", name, "used", NULL);
303			add_stat(LONG_LONG, &disk[i].avail,
304			"fs", name, "avail", NULL);
305			add_stat(LONG_LONG, &disk[i].total_inodes,
306			"fs", name, "total_inodes", NULL);
307			add_stat(LONG_LONG, &disk[i].used_inodes,
308			"fs", name, "used_inodes", NULL);
309			add_stat(LONG_LONG, &disk[i].free_inodes,
310			"fs", name, "free_inodes", NULL);
311	ats	1.10
312			free(buf);
313	tdb	1.1	}
314			}
315	ats	1.8	}
316
317			void populate_disk() {
318			int n, i;
319			diskio_stat_t *diskio;
320	tdb	1.1
321			diskio = use_diffs ? get_diskio_stats_diff(&n) : get_diskio_stats(&n);
322			if (diskio != NULL) {
323			for (i = 0; i < n; i++) {
324			const char *name = diskio[i].disk_name;
325
326			add_stat(STRING, &diskio[i].disk_name,
327			"disk", name, "disk_name", NULL);
328			add_stat(LONG_LONG, &diskio[i].read_bytes,
329			"disk", name, "read_bytes", NULL);
330			add_stat(LONG_LONG, &diskio[i].write_bytes,
331			"disk", name, "write_bytes", NULL);
332			add_stat(TIME_T, &diskio[i].systime,
333			"disk", name, "systime", NULL);
334			}
335			}
336	ats	1.8	}
337
338			void populate_proc() {
339			process_stat_t *proc = get_process_stats();
340	tdb	1.1
341			if (proc != NULL) {
342			add_stat(INT, &proc->total, "proc", "total", NULL);
343			add_stat(INT, &proc->running, "proc", "running", NULL);
344			add_stat(INT, &proc->sleeping, "proc", "sleeping", NULL);
345			add_stat(INT, &proc->stopped, "proc", "stopped", NULL);
346			add_stat(INT, &proc->zombie, "proc", "zombie", NULL);
347			}
348	ats	1.8	}
349
350			void populate_net() {
351			int n, i;
352			network_stat_t *net;
353	ats	1.18	network_iface_stat_t *iface;
354	tdb	1.1
355			net = use_diffs ? get_network_stats_diff(&n) : get_network_stats(&n);
356			if (net != NULL) {
357			for (i = 0; i < n; i++) {
358			const char *name = net[i].interface_name;
359
360			add_stat(STRING, &net[i].interface_name,
361			"net", name, "interface_name", NULL);
362			add_stat(LONG_LONG, &net[i].tx,
363			"net", name, "tx", NULL);
364			add_stat(LONG_LONG, &net[i].rx,
365			"net", name, "rx", NULL);
366			add_stat(TIME_T, &net[i].systime,
367			"net", name, "systime", NULL);
368			}
369			}
370	ats	1.18
371			iface = get_network_iface_stats(&n);
372			if (iface != NULL) {
373			for (i = 0; i < n; i++) {
374			const char *name = iface[i].interface_name;
375
376			add_stat(INT, &iface[i].speed,
377			"net", name, "speed", NULL);
378	ats	1.20	add_stat(BOOL, &iface[i].up,
379			"net", name, "up", NULL);
380	ats	1.18	add_stat(DUPLEX, &iface[i].dup,
381			"net", name, "duplex", NULL);
382			}
383			}
384	ats	1.8	}
385
386			void populate_page() {
387			page_stat_t *page;
388	tdb	1.1
389			page = use_diffs ? get_page_stats_diff() : get_page_stats();
390			if (page != NULL) {
391			add_stat(LONG_LONG, &page->pages_pagein, "page", "in", NULL);
392			add_stat(LONG_LONG, &page->pages_pageout, "page", "out", NULL);
393	ats	1.11	add_stat(TIME_T, &page->systime, "page", "systime", NULL);
394	tdb	1.1	}
395	ats	1.8	}
396
397			typedef struct {
398			const char *name;
399			void (*populate)();
400			int interesting;
401			} toplevel;
402			toplevel toplevels[] = {
403			{"const.", populate_const, 0},
404			{"cpu.", populate_cpu, 0},
405			{"mem.", populate_mem, 0},
406			{"load.", populate_load, 0},
407			{"user.", populate_user, 0},
408			{"swap.", populate_swap, 0},
409			{"general.", populate_general, 0},
410			{"fs.", populate_fs, 0},
411			{"disk.", populate_disk, 0},
412			{"proc.", populate_proc, 0},
413			{"net.", populate_net, 0},
414			{"page.", populate_page, 0},
415			{NULL, NULL, 0}
416			};
417
418			/* Set the "interesting" flag on the sections that we actually need to
419			fetch. */
420			void select_interesting(int argc, char **argv) {
421			toplevel *t;
422
423			if (argc == 0) {
424			for (t = &toplevels[0]; t->name != NULL; t++)
425			t->interesting = 1;
426			} else {
427			int i;
428
429			for (i = 0; i < argc; i++) {
430			for (t = &toplevels[0]; t->name != NULL; t++) {
431			if (strncmp(argv[i], t->name,
432			strlen(t->name)) == 0) {
433			t->interesting = 1;
434			break;
435			}
436			}
437			}
438			}
439			}
440
441			/* Clear and rebuild the stats array. */
442			void get_stats() {
443			toplevel *t;
444
445			clear_stats();
446
447			for (t = &toplevels[0]; t->name != NULL; t++) {
448			if (t->interesting)
449			t->populate();
450			}
451	tdb	1.1
452	ats	1.21	if (stats != NULL)
453			qsort(stats, num_stats, sizeof *stats, stats_compare);
454	tdb	1.1	}
455
456			/* Print the value of a stat. */
457			void print_stat_value(const stat *s) {
458			void *v = s->stat;
459
460			switch (s->type) {
461			case LONG_LONG:
462			printf("%lld", (long long )v);
463			break;
464			case TIME_T:
465			/* FIXME option for formatted time? */
466			printf("%ld", (time_t )v);
467			break;
468			case FLOAT:
469			printf("%f", (float )v);
470			break;
471			case DOUBLE:
472			printf("%f", (double )v);
473			break;
474			case STRING:
475			/* FIXME escaping? */
476			printf("%s", (char *)v);
477			break;
478			case INT:
479			printf("%d", (int )v);
480	ats	1.20	break;
481			case BOOL:
482			printf("%s", (int )v ? "true" : "false");
483	ats	1.18	break;
484			case DUPLEX:
485	ats	1.19	switch ((statgrab_duplex ) v) {
486	ats	1.18	case FULL_DUPLEX:
487			printf("full");
488			break;
489			case HALF_DUPLEX:
490			printf("half");
491			break;
492			default:
493			printf("unknown");
494			break;
495			}
496	tdb	1.1	break;
497			}
498			}
499
500			/* Print the name and value of a stat. */
501			void print_stat(const stat *s) {
502			switch (display_mode) {
503			case DISPLAY_LINUX:
504			printf("%s = ", s->name);
505			break;
506			case DISPLAY_BSD:
507			printf("%s: ", s->name);
508			break;
509			case DISPLAY_MRTG:
510			case DISPLAY_PLAIN:
511			break;
512			}
513			print_stat_value(s);
514			printf("\n");
515			}
516
517			/* Print stats as specified on the provided command line. */
518			void print_stats(int argc, char **argv) {
519			int i;
520
521			if (argc == optind) {
522			/* Print all stats. */
523			for (i = 0; i < num_stats; i++)
524			print_stat(&stats[i]);
525			} else {
526			/* Print selected stats. */
527			for (i = optind; i < argc; i++) {
528	ats	1.9	char *name = argv[i];
529	tdb	1.1	stat key;
530	ats	1.9	const stat s, end;
531			int (compare)(const void , const void *);
532
533			key.name = name;
534			if (name[strlen(name) - 1] == '.')
535			compare = stats_compare_prefix;
536			else
537			compare = stats_compare;
538	tdb	1.1
539	ats	1.21	if (stats == NULL) {
540			s = NULL;
541			} else {
542			s = (const stat *)bsearch(&key, stats,
543			num_stats,
544			sizeof *stats,
545			compare);
546			}
547
548	ats	1.9	if (s == NULL) {
549			printf("Unknown stat %s\n", name);
550			continue;
551			}
552
553			/* Find the range of stats the user wanted. */
554			for (; s >= stats; s--) {
555			if (compare(&key, s) != 0)
556			break;
557			}
558			s++;
559			for (end = s; end < &stats[num_stats]; end++) {
560			if (compare(&key, end) != 0)
561			break;
562			}
563
564			/* And print them. */
565			for (; s < end; s++) {
566	tdb	1.1	print_stat(s);
567			}
568			}
569			}
570			}
571
572			void usage() {
573			printf("Usage: statgrab [OPTION]... [STAT]...\n"
574	ats	1.9	"Display system statistics.\n"
575			"\n"
576			"If no STATs are given, all will be displayed. Specify 'STAT.' to display all\n"
577			"statistics starting with that prefix.\n"
578	tdb	1.1	"\n");
579			printf(" -l Linux sysctl-style output (default)\n"
580			" -b BSD sysctl-style output\n"
581			" -m MRTG-compatible output\n"
582			" -u Plain output (only show values)\n"
583			" -n Display cumulative stats once (default)\n"
584			" -s Display stat differences repeatedly\n"
585			" -o Display stat differences once\n"
586			" -t DELAY When repeating, wait DELAY seconds between updates (default 1)\n"
587	ats	1.5	" -p Display CPU usage differences as percentages rather than\n"
588			" absolute values\n"
589	tdb	1.1	"\n");
590	tdb	1.2	printf("Version %s - report bugs to <%s>.\n",
591	ats	1.5	PACKAGE_VERSION, PACKAGE_BUGREPORT);
592	tdb	1.1	exit(1);
593			}
594
595			int main(int argc, char **argv) {
596			opterr = 0;
597			while (1) {
598			int c = getopt(argc, argv, "lbmunsot:p");
599			if (c == -1)
600			break;
601			switch (c) {
602			case 'l':
603			display_mode = DISPLAY_LINUX;
604			break;
605			case 'b':
606			display_mode = DISPLAY_BSD;
607			break;
608			case 'm':
609			display_mode = DISPLAY_MRTG;
610			break;
611			case 'u':
612			display_mode = DISPLAY_PLAIN;
613			break;
614			case 'n':
615			repeat_mode = REPEAT_NONE;
616			break;
617			case 's':
618			repeat_mode = REPEAT_FOREVER;
619			break;
620			case 'o':
621			repeat_mode = REPEAT_ONCE;
622			break;
623			case 't':
624			repeat_time = atoi(optarg);
625			break;
626			case 'p':
627			use_cpu_percent = 1;
628			break;
629			default:
630			usage();
631			}
632			}
633
634			if (display_mode == DISPLAY_MRTG) {
635			if ((argc - optind) != 2)
636			die("mrtg mode: must specify exactly two stats");
637	ats	1.5	if (repeat_mode == REPEAT_FOREVER)
638	tdb	1.1	die("mrtg mode: cannot repeat display");
639			}
640	ats	1.5
641			if (use_cpu_percent && repeat_mode == REPEAT_NONE)
642			die("CPU percentage usage display requires stat differences");
643	tdb	1.1
644	ats	1.8	if (repeat_mode == REPEAT_NONE)
645			use_diffs = 0;
646			else
647			use_diffs = 1;
648
649			select_interesting(argc - optind, &argv[optind]);
650
651	ats	1.12	/* We don't care if statgrab_init fails, because we can just display
652			the statistics that can be read as non-root. */
653			statgrab_init();
654	ats	1.15	if (statgrab_drop_privileges() != 0)
655			die("Failed to drop setuid/setgid privileges");
656	ats	1.12
657	tdb	1.1	switch (repeat_mode) {
658			case REPEAT_NONE:
659	ats	1.8	get_stats();
660	tdb	1.1	print_stats(argc, argv);
661			break;
662			case REPEAT_ONCE:
663	ats	1.8	get_stats();
664	tdb	1.1	sleep(repeat_time);
665	ats	1.8	get_stats();
666	tdb	1.1	print_stats(argc, argv);
667			break;
668			case REPEAT_FOREVER:
669			while (1) {
670	ats	1.8	get_stats();
671	tdb	1.1	print_stats(argc, argv);
672			printf("\n");
673			sleep(repeat_time);
674			}
675			}
676
677			if (display_mode == DISPLAY_MRTG) {
678			printf("\n");
679			printf("statgrab\n");
680			}
681
682			return 0;
683			}
684