src/statgrab/statgrab.c

/* 
 * i-scream libstatgrab
 * 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 1.27 2004/07/16 11:17:16 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) {
                sg_cpu_percents *cpu_p = sg_get_cpu_percents();

                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 {
                sg_cpu_stats *cpu_s;

                cpu_s = use_diffs ? sg_get_cpu_stats_diff()
                                  : sg_get_cpu_stats();
                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() {
        sg_mem_stats *mem = sg_get_mem_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() {
        sg_load_stats *load = sg_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() {
        sg_user_stats *user = sg_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() {
        sg_swap_stats *swap = sg_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() {
        /* FIXME this should be renamed to host. */
        sg_host_info *host = sg_get_host_info();

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

void populate_fs() {
        int n, i;
        sg_fs_stats *disk = sg_get_fs_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;
        sg_disk_io_stats *diskio;

        diskio = use_diffs ? sg_get_disk_io_stats_diff(&n)
                           : sg_get_disk_io_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() {
        /* FIXME expose individual process info too */
        sg_process_count *proc = sg_get_process_count();

        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 num_io, num_iface, i;
        sg_network_io_stats *io;
        sg_network_iface_stats *iface;

        io = use_diffs ? sg_get_network_io_stats_diff(&num_io)
                       : sg_get_network_io_stats(&num_io);
        if (io != NULL) {
                for (i = 0; i < num_io; i++) {
                        const char *name = io[i].interface_name;
        
                        add_stat(STRING, &io[i].interface_name,
                                 "net", name, "interface_name", NULL);
                        add_stat(LONG_LONG, &io[i].tx,
                                 "net", name, "tx", NULL);
                        add_stat(LONG_LONG, &io[i].rx,
                                 "net", name, "rx", NULL);
                        add_stat(LONG_LONG, &io[i].ipackets,
                                 "net", name, "ipackets", NULL);
                        add_stat(LONG_LONG, &io[i].opackets,
                                 "net", name, "opackets", NULL);
                        add_stat(LONG_LONG, &io[i].ierrors,
                                 "net", name, "ierrors", NULL);
                        add_stat(LONG_LONG, &io[i].oerrors,
                                 "net", name, "oerrors", NULL);
                        add_stat(LONG_LONG, &io[i].collisions,
                                 "net", name, "collisions", NULL);
                        add_stat(TIME_T, &io[i].systime,
                                 "net", name, "systime", NULL);
                }
        }

        iface = sg_get_network_iface_stats(&num_iface);
        if (iface != NULL) {
                for (i = 0; i < num_iface; i++) {
                        const char *name = iface[i].interface_name;
                        int had_io = 0, j;

                        /* If there wasn't a corresponding io stat,
                           add interface_name from here. */
                        if (io != NULL) {
                                for (j = 0; j < num_io; j++) {
                                        if (strcmp(io[j].interface_name,
                                                   name) == 0) {
                                                had_io = 1;
                                                break;
                                        }
                                }
                        }
                        if (!had_io) {
                                add_stat(STRING, &iface[i].interface_name,
                                        "net", name, "interface_name", NULL);
                        }

                        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() {
        sg_page_stats *page;

        page = use_diffs ? sg_get_page_stats_diff() : sg_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;
        long l;

        switch (s->type) {
        case LONG_LONG:
                printf("%lld", *(long long *)v);
                break;
        case TIME_T:
                /* FIXME option for formatted time? */
                l = *(time_t *)v;
                printf("%ld", l);
                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 (*(sg_iface_duplex *) v) {
                case SG_IFACE_DUPLEX_FULL:
                        printf("full");
                        break;
                case SG_IFACE_DUPLEX_HALF:
                        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 sg_init fails, because we can just display
           the statistics that can be read as non-root. */
        sg_init();
        if (sg_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:	1.28
Committed:	Sun Jul 18 20:21:21 2004 UTC (20 years, 3 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
CVS Tags:	LIBSTATGRAB_0_10_2, LIBSTATGRAB_0_10_1
Changes since 1.27:	+2 -2 lines
Log Message:	Catch a few bits of documentation/comments containing the deprecated function names.
#	User	Rev	Content
1	tdb	1.1	/*
2	tdb	1.25	* i-scream libstatgrab
3	tdb	1.1	* 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	tdb	1.28	* $Id: statgrab.c,v 1.27 2004/07/16 11:17:16 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	ats	1.24	sg_cpu_percents *cpu_p = sg_get_cpu_percents();
170	tdb	1.1
171			if (cpu_p != NULL) {
172			add_stat(FLOAT, &cpu_p->user,
173	tdb	1.26	"cpu", "user", NULL);
174	tdb	1.1	add_stat(FLOAT, &cpu_p->kernel,
175	tdb	1.26	"cpu", "kernel", NULL);
176	tdb	1.1	add_stat(FLOAT, &cpu_p->idle,
177	tdb	1.26	"cpu", "idle", NULL);
178	tdb	1.1	add_stat(FLOAT, &cpu_p->iowait,
179	tdb	1.26	"cpu", "iowait", NULL);
180	tdb	1.1	add_stat(FLOAT, &cpu_p->swap,
181	tdb	1.26	"cpu", "swap", NULL);
182	tdb	1.1	add_stat(FLOAT, &cpu_p->nice,
183	tdb	1.26	"cpu", "nice", NULL);
184	ats	1.7	add_stat(TIME_T, &cpu_p->time_taken,
185	tdb	1.26	"cpu", "time_taken", NULL);
186	tdb	1.1	}
187			} else {
188	ats	1.24	sg_cpu_stats *cpu_s;
189	ats	1.8
190	ats	1.24	cpu_s = use_diffs ? sg_get_cpu_stats_diff()
191	tdb	1.26	: sg_get_cpu_stats();
192	tdb	1.1	if (cpu_s != NULL) {
193			add_stat(LONG_LONG, &cpu_s->user,
194	tdb	1.26	"cpu", "user", NULL);
195	tdb	1.1	add_stat(LONG_LONG, &cpu_s->kernel,
196	tdb	1.26	"cpu", "kernel", NULL);
197	tdb	1.1	add_stat(LONG_LONG, &cpu_s->idle,
198	tdb	1.26	"cpu", "idle", NULL);
199	tdb	1.1	add_stat(LONG_LONG, &cpu_s->iowait,
200	tdb	1.26	"cpu", "iowait", NULL);
201	tdb	1.1	add_stat(LONG_LONG, &cpu_s->swap,
202	tdb	1.26	"cpu", "swap", NULL);
203	tdb	1.1	add_stat(LONG_LONG, &cpu_s->nice,
204	tdb	1.26	"cpu", "nice", NULL);
205	tdb	1.1	add_stat(LONG_LONG, &cpu_s->total,
206	tdb	1.26	"cpu", "total", NULL);
207	tdb	1.1	add_stat(TIME_T, &cpu_s->systime,
208	tdb	1.26	"cpu", "systime", NULL);
209	tdb	1.1	}
210			}
211	ats	1.8	}
212
213			void populate_mem() {
214	ats	1.24	sg_mem_stats *mem = sg_get_mem_stats();
215	tdb	1.1
216			if (mem != NULL) {
217			add_stat(LONG_LONG, &mem->total, "mem", "total", NULL);
218			add_stat(LONG_LONG, &mem->free, "mem", "free", NULL);
219			add_stat(LONG_LONG, &mem->used, "mem", "used", NULL);
220			add_stat(LONG_LONG, &mem->cache, "mem", "cache", NULL);
221			}
222	ats	1.8	}
223
224			void populate_load() {
225	ats	1.24	sg_load_stats *load = sg_get_load_stats();
226	tdb	1.1
227			if (load != NULL) {
228			add_stat(DOUBLE, &load->min1, "load", "min1", NULL);
229			add_stat(DOUBLE, &load->min5, "load", "min5", NULL);
230			add_stat(DOUBLE, &load->min15, "load", "min15", NULL);
231			}
232	ats	1.8	}
233
234			void populate_user() {
235	ats	1.24	sg_user_stats *user = sg_get_user_stats();
236	tdb	1.1
237			if (user != NULL) {
238			add_stat(INT, &user->num_entries, "user", "num", NULL);
239			add_stat(STRING, &user->name_list, "user", "names", NULL);
240			}
241	ats	1.8	}
242
243			void populate_swap() {
244	ats	1.24	sg_swap_stats *swap = sg_get_swap_stats();
245	tdb	1.1
246			if (swap != NULL) {
247			add_stat(LONG_LONG, &swap->total, "swap", "total", NULL);
248			add_stat(LONG_LONG, &swap->used, "swap", "used", NULL);
249			add_stat(LONG_LONG, &swap->free, "swap", "free", NULL);
250			}
251	ats	1.8	}
252
253			void populate_general() {
254	ats	1.24	/* FIXME this should be renamed to host. */
255			sg_host_info *host = sg_get_host_info();
256	tdb	1.1
257	ats	1.24	if (host != NULL) {
258			add_stat(STRING, &host->os_name,
259	tdb	1.26	"general", "os_name", NULL);
260	ats	1.24	add_stat(STRING, &host->os_release,
261	tdb	1.26	"general", "os_release", NULL);
262	ats	1.24	add_stat(STRING, &host->os_version,
263	tdb	1.26	"general", "os_version", NULL);
264	ats	1.24	add_stat(STRING, &host->platform, "general", "platform", NULL);
265			add_stat(STRING, &host->hostname, "general", "hostname", NULL);
266			add_stat(TIME_T, &host->uptime, "general", "uptime", NULL);
267	tdb	1.1	}
268	ats	1.8	}
269
270			void populate_fs() {
271			int n, i;
272	ats	1.24	sg_fs_stats *disk = sg_get_fs_stats(&n);
273	tdb	1.1
274			if (disk != NULL) {
275			for (i = 0; i < n; i++) {
276			/* FIXME it'd be nicer if libstatgrab did this */
277	ats	1.10	char buf, name, *p;
278			const char *device = disk[i].device_name;
279
280			if (strcmp(device, "/") == 0)
281			device = "root";
282
283			buf = strdup(device);
284			if (buf == NULL)
285			die("out of memory");
286
287			name = buf;
288	ats	1.13	if (strlen(name) == 2 && name[1] == ':')
289			name[1] = '\0';
290	ats	1.10	if (strncmp(name, "/dev/", 5) == 0)
291			name += 5;
292			while ((p = strchr(name, '/')) != NULL)
293			*p = '_';
294
295	tdb	1.1	add_stat(STRING, &disk[i].device_name,
296	tdb	1.26	"fs", name, "device_name", NULL);
297	tdb	1.1	add_stat(STRING, &disk[i].fs_type,
298	tdb	1.26	"fs", name, "fs_type", NULL);
299	tdb	1.1	add_stat(STRING, &disk[i].mnt_point,
300	tdb	1.26	"fs", name, "mnt_point", NULL);
301	tdb	1.1	add_stat(LONG_LONG, &disk[i].size,
302	tdb	1.26	"fs", name, "size", NULL);
303	tdb	1.1	add_stat(LONG_LONG, &disk[i].used,
304	tdb	1.26	"fs", name, "used", NULL);
305	tdb	1.1	add_stat(LONG_LONG, &disk[i].avail,
306	tdb	1.26	"fs", name, "avail", NULL);
307	tdb	1.1	add_stat(LONG_LONG, &disk[i].total_inodes,
308	tdb	1.26	"fs", name, "total_inodes", NULL);
309	tdb	1.1	add_stat(LONG_LONG, &disk[i].used_inodes,
310	tdb	1.26	"fs", name, "used_inodes", NULL);
311	tdb	1.1	add_stat(LONG_LONG, &disk[i].free_inodes,
312	tdb	1.26	"fs", name, "free_inodes", NULL);
313	ats	1.10
314			free(buf);
315	tdb	1.1	}
316			}
317	ats	1.8	}
318
319			void populate_disk() {
320			int n, i;
321	ats	1.24	sg_disk_io_stats *diskio;
322	tdb	1.1
323	ats	1.24	diskio = use_diffs ? sg_get_disk_io_stats_diff(&n)
324	tdb	1.26	: sg_get_disk_io_stats(&n);
325	tdb	1.1	if (diskio != NULL) {
326			for (i = 0; i < n; i++) {
327			const char *name = diskio[i].disk_name;
328
329			add_stat(STRING, &diskio[i].disk_name,
330	tdb	1.26	"disk", name, "disk_name", NULL);
331	tdb	1.1	add_stat(LONG_LONG, &diskio[i].read_bytes,
332	tdb	1.26	"disk", name, "read_bytes", NULL);
333	tdb	1.1	add_stat(LONG_LONG, &diskio[i].write_bytes,
334	tdb	1.26	"disk", name, "write_bytes", NULL);
335	tdb	1.1	add_stat(TIME_T, &diskio[i].systime,
336	tdb	1.26	"disk", name, "systime", NULL);
337	tdb	1.1	}
338			}
339	ats	1.8	}
340
341			void populate_proc() {
342	ats	1.24	/* FIXME expose individual process info too */
343			sg_process_count *proc = sg_get_process_count();
344	tdb	1.1
345			if (proc != NULL) {
346			add_stat(INT, &proc->total, "proc", "total", NULL);
347			add_stat(INT, &proc->running, "proc", "running", NULL);
348			add_stat(INT, &proc->sleeping, "proc", "sleeping", NULL);
349			add_stat(INT, &proc->stopped, "proc", "stopped", NULL);
350			add_stat(INT, &proc->zombie, "proc", "zombie", NULL);
351			}
352	ats	1.8	}
353
354			void populate_net() {
355	ats	1.27	int num_io, num_iface, i;
356	ats	1.24	sg_network_io_stats *io;
357			sg_network_iface_stats *iface;
358	tdb	1.1
359	ats	1.27	io = use_diffs ? sg_get_network_io_stats_diff(&num_io)
360			: sg_get_network_io_stats(&num_io);
361	ats	1.24	if (io != NULL) {
362	ats	1.27	for (i = 0; i < num_io; i++) {
363	ats	1.24	const char *name = io[i].interface_name;
364	tdb	1.1
365	ats	1.24	add_stat(STRING, &io[i].interface_name,
366	tdb	1.26	"net", name, "interface_name", NULL);
367	ats	1.24	add_stat(LONG_LONG, &io[i].tx,
368	tdb	1.26	"net", name, "tx", NULL);
369	ats	1.24	add_stat(LONG_LONG, &io[i].rx,
370	tdb	1.26	"net", name, "rx", NULL);
371	ats	1.24	add_stat(LONG_LONG, &io[i].ipackets,
372	tdb	1.26	"net", name, "ipackets", NULL);
373	ats	1.24	add_stat(LONG_LONG, &io[i].opackets,
374	tdb	1.26	"net", name, "opackets", NULL);
375	ats	1.24	add_stat(LONG_LONG, &io[i].ierrors,
376	tdb	1.26	"net", name, "ierrors", NULL);
377	ats	1.24	add_stat(LONG_LONG, &io[i].oerrors,
378	tdb	1.26	"net", name, "oerrors", NULL);
379	ats	1.24	add_stat(LONG_LONG, &io[i].collisions,
380	tdb	1.26	"net", name, "collisions", NULL);
381	ats	1.24	add_stat(TIME_T, &io[i].systime,
382	tdb	1.26	"net", name, "systime", NULL);
383	tdb	1.1	}
384			}
385	ats	1.18
386	ats	1.27	iface = sg_get_network_iface_stats(&num_iface);
387	ats	1.18	if (iface != NULL) {
388	ats	1.27	for (i = 0; i < num_iface; i++) {
389	ats	1.18	const char *name = iface[i].interface_name;
390	ats	1.27	int had_io = 0, j;
391
392			/* If there wasn't a corresponding io stat,
393			add interface_name from here. */
394			if (io != NULL) {
395			for (j = 0; j < num_io; j++) {
396			if (strcmp(io[j].interface_name,
397			name) == 0) {
398			had_io = 1;
399			break;
400			}
401			}
402			}
403			if (!had_io) {
404			add_stat(STRING, &iface[i].interface_name,
405			"net", name, "interface_name", NULL);
406			}
407	ats	1.18
408			add_stat(INT, &iface[i].speed,
409	tdb	1.26	"net", name, "speed", NULL);
410	ats	1.20	add_stat(BOOL, &iface[i].up,
411	tdb	1.26	"net", name, "up", NULL);
412	ats	1.18	add_stat(DUPLEX, &iface[i].dup,
413	tdb	1.26	"net", name, "duplex", NULL);
414	ats	1.18	}
415			}
416	ats	1.8	}
417
418			void populate_page() {
419	ats	1.24	sg_page_stats *page;
420	tdb	1.1
421	ats	1.24	page = use_diffs ? sg_get_page_stats_diff() : sg_get_page_stats();
422	tdb	1.1	if (page != NULL) {
423			add_stat(LONG_LONG, &page->pages_pagein, "page", "in", NULL);
424			add_stat(LONG_LONG, &page->pages_pageout, "page", "out", NULL);
425	ats	1.11	add_stat(TIME_T, &page->systime, "page", "systime", NULL);
426	tdb	1.1	}
427	ats	1.8	}
428
429			typedef struct {
430			const char *name;
431			void (*populate)();
432			int interesting;
433			} toplevel;
434			toplevel toplevels[] = {
435			{"const.", populate_const, 0},
436			{"cpu.", populate_cpu, 0},
437			{"mem.", populate_mem, 0},
438			{"load.", populate_load, 0},
439			{"user.", populate_user, 0},
440			{"swap.", populate_swap, 0},
441			{"general.", populate_general, 0},
442			{"fs.", populate_fs, 0},
443			{"disk.", populate_disk, 0},
444			{"proc.", populate_proc, 0},
445			{"net.", populate_net, 0},
446			{"page.", populate_page, 0},
447			{NULL, NULL, 0}
448			};
449
450			/* Set the "interesting" flag on the sections that we actually need to
451			fetch. */
452			void select_interesting(int argc, char **argv) {
453			toplevel *t;
454
455			if (argc == 0) {
456			for (t = &toplevels[0]; t->name != NULL; t++)
457			t->interesting = 1;
458			} else {
459			int i;
460
461			for (i = 0; i < argc; i++) {
462			for (t = &toplevels[0]; t->name != NULL; t++) {
463			if (strncmp(argv[i], t->name,
464	tdb	1.26	strlen(t->name)) == 0) {
465	ats	1.8	t->interesting = 1;
466			break;
467			}
468			}
469			}
470			}
471			}
472
473			/* Clear and rebuild the stats array. */
474			void get_stats() {
475			toplevel *t;
476
477			clear_stats();
478
479			for (t = &toplevels[0]; t->name != NULL; t++) {
480			if (t->interesting)
481			t->populate();
482			}
483	tdb	1.1
484	ats	1.21	if (stats != NULL)
485			qsort(stats, num_stats, sizeof *stats, stats_compare);
486	tdb	1.1	}
487
488			/* Print the value of a stat. */
489			void print_stat_value(const stat *s) {
490			void *v = s->stat;
491	ats	1.23	long l;
492	tdb	1.1
493			switch (s->type) {
494			case LONG_LONG:
495			printf("%lld", (long long )v);
496			break;
497			case TIME_T:
498			/* FIXME option for formatted time? */
499	ats	1.23	l = (time_t )v;
500			printf("%ld", l);
501	tdb	1.1	break;
502			case FLOAT:
503			printf("%f", (float )v);
504			break;
505			case DOUBLE:
506			printf("%f", (double )v);
507			break;
508			case STRING:
509			/* FIXME escaping? */
510			printf("%s", (char *)v);
511			break;
512			case INT:
513			printf("%d", (int )v);
514	ats	1.20	break;
515			case BOOL:
516			printf("%s", (int )v ? "true" : "false");
517	ats	1.18	break;
518			case DUPLEX:
519	ats	1.24	switch ((sg_iface_duplex ) v) {
520			case SG_IFACE_DUPLEX_FULL:
521	ats	1.18	printf("full");
522			break;
523	ats	1.24	case SG_IFACE_DUPLEX_HALF:
524	ats	1.18	printf("half");
525			break;
526			default:
527			printf("unknown");
528			break;
529			}
530	tdb	1.1	break;
531			}
532			}
533
534			/* Print the name and value of a stat. */
535			void print_stat(const stat *s) {
536			switch (display_mode) {
537			case DISPLAY_LINUX:
538			printf("%s = ", s->name);
539			break;
540			case DISPLAY_BSD:
541			printf("%s: ", s->name);
542			break;
543			case DISPLAY_MRTG:
544			case DISPLAY_PLAIN:
545			break;
546			}
547			print_stat_value(s);
548			printf("\n");
549			}
550
551			/* Print stats as specified on the provided command line. */
552			void print_stats(int argc, char **argv) {
553			int i;
554
555			if (argc == optind) {
556			/* Print all stats. */
557			for (i = 0; i < num_stats; i++)
558			print_stat(&stats[i]);
559			} else {
560			/* Print selected stats. */
561			for (i = optind; i < argc; i++) {
562	ats	1.9	char *name = argv[i];
563	tdb	1.1	stat key;
564	ats	1.9	const stat s, end;
565			int (compare)(const void , const void *);
566
567			key.name = name;
568			if (name[strlen(name) - 1] == '.')
569			compare = stats_compare_prefix;
570			else
571			compare = stats_compare;
572	tdb	1.1
573	ats	1.21	if (stats == NULL) {
574			s = NULL;
575			} else {
576			s = (const stat *)bsearch(&key, stats,
577	tdb	1.26	num_stats,
578			sizeof *stats,
579			compare);
580	ats	1.21	}
581
582	ats	1.9	if (s == NULL) {
583			printf("Unknown stat %s\n", name);
584			continue;
585			}
586
587			/* Find the range of stats the user wanted. */
588			for (; s >= stats; s--) {
589			if (compare(&key, s) != 0)
590			break;
591			}
592			s++;
593			for (end = s; end < &stats[num_stats]; end++) {
594			if (compare(&key, end) != 0)
595			break;
596			}
597
598			/* And print them. */
599			for (; s < end; s++) {
600	tdb	1.1	print_stat(s);
601			}
602			}
603			}
604			}
605
606			void usage() {
607			printf("Usage: statgrab [OPTION]... [STAT]...\n"
608	ats	1.9	"Display system statistics.\n"
609			"\n"
610			"If no STATs are given, all will be displayed. Specify 'STAT.' to display all\n"
611			"statistics starting with that prefix.\n"
612	tdb	1.1	"\n");
613	tdb	1.26	printf(" -l Linux sysctl-style output (default)\n"
614			" -b BSD sysctl-style output\n"
615			" -m MRTG-compatible output\n"
616			" -u Plain output (only show values)\n"
617			" -n Display cumulative stats once (default)\n"
618			" -s Display stat differences repeatedly\n"
619			" -o Display stat differences once\n"
620	tdb	1.1	" -t DELAY When repeating, wait DELAY seconds between updates (default 1)\n"
621	tdb	1.26	" -p Display CPU usage differences as percentages rather than\n"
622			" absolute values\n"
623	tdb	1.1	"\n");
624	tdb	1.2	printf("Version %s - report bugs to <%s>.\n",
625	ats	1.5	PACKAGE_VERSION, PACKAGE_BUGREPORT);
626	tdb	1.1	exit(1);
627			}
628
629			int main(int argc, char **argv) {
630			opterr = 0;
631			while (1) {
632			int c = getopt(argc, argv, "lbmunsot:p");
633			if (c == -1)
634			break;
635			switch (c) {
636			case 'l':
637			display_mode = DISPLAY_LINUX;
638			break;
639			case 'b':
640			display_mode = DISPLAY_BSD;
641			break;
642			case 'm':
643			display_mode = DISPLAY_MRTG;
644			break;
645			case 'u':
646			display_mode = DISPLAY_PLAIN;
647			break;
648			case 'n':
649			repeat_mode = REPEAT_NONE;
650			break;
651			case 's':
652			repeat_mode = REPEAT_FOREVER;
653			break;
654			case 'o':
655			repeat_mode = REPEAT_ONCE;
656			break;
657			case 't':
658			repeat_time = atoi(optarg);
659			break;
660			case 'p':
661			use_cpu_percent = 1;
662			break;
663			default:
664			usage();
665			}
666			}
667
668			if (display_mode == DISPLAY_MRTG) {
669			if ((argc - optind) != 2)
670			die("mrtg mode: must specify exactly two stats");
671	ats	1.5	if (repeat_mode == REPEAT_FOREVER)
672	tdb	1.1	die("mrtg mode: cannot repeat display");
673			}
674	ats	1.5
675			if (use_cpu_percent && repeat_mode == REPEAT_NONE)
676			die("CPU percentage usage display requires stat differences");
677	tdb	1.1
678	ats	1.8	if (repeat_mode == REPEAT_NONE)
679			use_diffs = 0;
680			else
681			use_diffs = 1;
682
683			select_interesting(argc - optind, &argv[optind]);
684
685	tdb	1.28	/* We don't care if sg_init fails, because we can just display
686	ats	1.12	the statistics that can be read as non-root. */
687	ats	1.24	sg_init();
688			if (sg_drop_privileges() != 0)
689	ats	1.15	die("Failed to drop setuid/setgid privileges");
690	ats	1.12
691	tdb	1.1	switch (repeat_mode) {
692			case REPEAT_NONE:
693	ats	1.8	get_stats();
694	tdb	1.1	print_stats(argc, argv);
695			break;
696			case REPEAT_ONCE:
697	ats	1.8	get_stats();
698	tdb	1.1	sleep(repeat_time);
699	ats	1.8	get_stats();
700	tdb	1.1	print_stats(argc, argv);
701			break;
702			case REPEAT_FOREVER:
703			while (1) {
704	ats	1.8	get_stats();
705	tdb	1.1	print_stats(argc, argv);
706			printf("\n");
707			sleep(repeat_time);
708			}
709			}
710
711			if (display_mode == DISPLAY_MRTG) {
712			printf("\n");
713			printf("statgrab\n");
714			}
715
716			return 0;
717			}
718