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/*
* ifstat - InterFace STATistics
* Copyright (c) 2001, Gal Roualland <gael.roualland@dial.oleane.com>
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: ifstat.c,v 1.47 2003/11/22 01:27:51 gael Exp $
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#if STDC_HEADERS
#include <string.h>
#else
# ifndef HAVE_STRCHR
# define strchr index
# define strrchr rindex
# endif
char *strchr (), *strrchr ();
# ifndef HAVE_MEMCPY
# define memcpy(d, s, n) bcopy ((s), (d), (n))
# define memmove(d, s, n) bcopy ((s), (d), (n))
# endif
#endif
#ifdef HAVE_CTYPE_H
#include <ctype.h>
#endif
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
#endif
#ifdef HAVE_SYS_TERMIOS_H
#include <sys/termios.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include "ifstat.h"
#ifdef HAVE_SIGACTION
static void _setsig(int sig, RETSIGTYPE (*handler)(int)) {
struct sigaction sa;
memset(&sa, 0, sizeof(struct sigaction));
sa.sa_handler = handler;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
sigaction(sig, &sa, NULL);
}
#define SIGNAL(si, handler) _setsig((si), (handler))
#define RESIGNAL(si, handler)
#else
#define SIGNAL(si, handler) signal((si), (handler))
#define RESIGNAL(si, handler) signal((si), (handler))
#endif
#ifndef HAVE_SNPRINTF
/* bogus implementation with vsprintf */
#ifdef HAVE_STDARG_H
#include <stdarg.h>
#endif
#include <assert.h>
int snprintf(char *str, size_t size, const char *format, ...) {
int res;
va_list ap;
va_start(ap, format);
res = vsprintf(str, format, ap);
va_end(ap);
assert(res + 1 <= size);
return res;
}
#endif
#ifdef WIN32
/* native win32 misses gettimeofday and its select doesn't behave
the same way, so replace them by bogus versions that work
as expected here */
#include <windows.h>
#include <sys/timeb.h>
static int win_select(int nfds, void *fdr, void *fdw, void *fde,
struct timeval *tv) {
Sleep(tv->tv_sec * 1000 + tv->tv_usec / 1000);
return 0;
}
#define select win_select
static int win_gettimeofday(struct timeval *tv, void *tz) {
struct _timeb timeb;
_ftime(&timeb);
tv->tv_sec = timeb.time;
tv->tv_usec = timeb.millitm * 1000;
return 0;
}
#define gettimeofday win_gettimeofday
#endif
/* parse interface list, using \ as escape character */
static int parse_interfaces(char *string, struct ifstat_list *ifs) {
char *s, *d, *buf;
int len, escaped = 0;
if (string == NULL || (len = strlen(string)) <= 0)
return 0;
if ((buf = malloc(len + 1)) == NULL) {
ifstat_perror("malloc");
return 0;
}
d = buf;
for(s = string; *s != '\0'; s++) {
if (!escaped) {
if (*s == '\\') {
escaped = 1;
continue;
}
if (*s == ',') {
*d = '\0';
ifstat_add_interface(ifs, buf, 0);
d = buf;
continue;
}
} else
escaped = 0;
*d++ = *s;
}
*d = '\0';
if (*buf != '\0')
ifstat_add_interface(ifs, buf, 0);
free(buf);
return 1;
}
static void usage(int result) {
fprintf(stderr,
"usage: %s [-a] [-l] [-z] [-n] [-v] [-h] [-t] [-i if0,if1,...]\n"
" [-d drv[:opt]] [-s [comm@][#]host[/nn]] [-T] [-A] [-w]\n"
" [-W] [-S] [-b] [-q] [delay[/delay] [count]]\n", ifstat_progname);
exit(result);
}
static void print_center(char *s, int len, int width) {
int ofs, i;
ofs = (width - len) / 2;
for (i = 0; i < ofs; i++)
putc(' ', stdout);
for (i = 0; i < len; i++)
putc(s[i], stdout);
for (i = 0; i < (width - (ofs + len)); i++)
putc(' ', stdout);
}
struct {
int cols, lines, datalines;
} termsize;
int _sigwinch = 0;
static RETSIGTYPE update_termsize(int sig) {
#ifdef TIOCGWINSZ
struct winsize ws;
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == 0 &&
ws.ws_row > 0 && ws.ws_col > 0) {
termsize.cols = ws.ws_col;
termsize.lines = ws.ws_row;
} else { /* defaults if unknown */
termsize.lines = 25;
termsize.cols = 80;
}
#ifdef SIGWINCH
if (sig == SIGWINCH)
_sigwinch = 1;
RESIGNAL(SIGWINCH, &update_termsize);
#endif
#endif
}
int _sigcont = 0;
#ifdef SIGCONT
static RETSIGTYPE sigcont(int sig) {
(void)sig;
_sigcont = 1;
RESIGNAL(SIGCONT, &sigcont);
}
#endif
#define OPT_TIMESTAMP 1
#define OPT_FIXEDWIDTH 2
#define OPT_UNITBITS 4
#define OPT_NOINDEX 8
#define OPT_NONULL 16
#define OPT_NOSCAN 32
#define OPT_WRAP 64
#define OPT_NOTITLE 128
#define OPT_NOSCROLL 256
#define SPACE " "
#define NUM "12345.12"
#define NA " n/a"
#define WIDTH ((ssize_t)sizeof(NUM) - 1) * 2 + ((ssize_t)sizeof(SPACE) - 1)
#define LEN(options, namelen) (((options) & OPT_FIXEDWIDTH || (namelen) < WIDTH) ? WIDTH : (namelen))
#define FMT(n) (((n) < 1e+5) ? "%8.2f" : (((n) < 1e+6) ? "%.1f" : "%.2e"))
/*
eth0 lo
KB/s in KB/s out KB/s in KB/s out
14562.23 12345.25 0.00 0.00
*/
static void print_wrap(int options, int line) {
putc('\n', stdout);
putc((char) (((line - 1) % 26) + 65), stdout);
if (options & OPT_TIMESTAMP)
fputs(" " SPACE, stdout);
}
static int pos_next(int pos, int len, int options) {
int ofs = (options & OPT_TIMESTAMP) ? 8 + sizeof(SPACE) - 1 : 1;
pos += len + sizeof(SPACE) - 1;
if (options & OPT_WRAP && pos + ofs + len >= termsize.cols)
pos = 0;
return pos;
}
static void print_legend(struct ifstat_data *ptr, int options, int line) {
int len, pos;
if (line == 0) {
putc('\n', stdout);
if (options & OPT_TIMESTAMP)
fputs("HH:MM:SS" SPACE, stdout);
else if (options & OPT_WRAP)
putc(' ', stdout);
} else
print_wrap(options, line);
pos = 0;
for (; ptr != NULL; ptr = ptr->next) {
if (pos > 0)
fputs(SPACE, stdout);
len = LEN(options, ptr->namelen);
print_center((options & OPT_UNITBITS) ? " Kbps in Kbps out" :
" KB/s in KB/s out", WIDTH, len);
if ((pos = pos_next(pos, len, options)) == 0 && ptr->next != NULL)
return;
}
putc('\n', stdout);
}
static void print_header(struct ifstat_list *ifs, int options) {
struct ifstat_data *ptr, *start;
int len, pos, line;
if (options & OPT_TIMESTAMP)
fputs(" Time " SPACE, stdout);
else if (options & OPT_WRAP)
putc(' ', stdout);
pos = 0;
line = 0;
start = ifs->first;
for (ptr = ifs->first; ptr != NULL; ptr = ptr->next) {
if (pos == 0 && ptr != ifs->first) {
print_legend(start, options, line);
start = ptr;
print_wrap(options, ++line);
} else if (pos > 0)
fputs(SPACE, stdout);
len = LEN(options, ptr->namelen);
print_center(ptr->name, ptr->namelen < len ? ptr->namelen : len, len);
pos = pos_next(pos, len, options);
}
termsize.datalines = line + 1;
print_legend(start, options, line);
}
static void print_stats(struct ifstat_list *ifs,
struct timeval *start,
struct timeval *end,
int options) {
struct ifstat_data *ptr;
int hasindex = 1, pos = 0, len, line = 0;
char stats[WIDTH + 1];
double delay, kbin, kbout, tkbin, tkbout, scale;
struct tm *ltm;
if (options & OPT_NOSCROLL)
putc('\r', stdout);
if (options & OPT_TIMESTAMP) {
time_t t = end->tv_sec;
if ((ltm = localtime(&t)) != NULL)
fprintf(stdout, "%02d:%02d:%02d" SPACE,
ltm->tm_hour, ltm->tm_min, ltm->tm_sec);
else
fputs("--:--:--" SPACE, stdout);
} else if (options & OPT_WRAP)
putc(' ', stdout);
delay = end->tv_sec - start->tv_sec + ((double) (end->tv_usec - start->tv_usec))
/ (double) 1000000;
scale = delay * (options & OPT_UNITBITS ? 128 : 1024);
tkbin = tkbout = 0;
for (ptr = ifs->first; ptr != NULL; ptr = ptr->next) {
if (ptr->flags & IFSTAT_HASSTATS) {
kbin = (double) (ptr->bin - ptr->obin) / (double) scale;
tkbin += kbin;
kbout = (double) (ptr->bout - ptr->obout) / (double) scale;
tkbout += kbout;
ptr->flags &= ~IFSTAT_HASSTATS;
} else if (ptr->flags & IFSTAT_TOTAL) {
kbin = tkbin;
kbout = tkbout;
} else {
kbin = -1;
kbout = -1;
}
if (ptr->flags & IFSTAT_HASINDEX)
ptr->flags &= ~IFSTAT_HASINDEX;
else
hasindex = 0;
if (kbin >= 0)
snprintf(stats, sizeof(NUM), FMT(kbin), kbin);
else
strcpy(stats, NA);
strcpy(stats + sizeof(NUM) - 1, SPACE);
if (kbout >= 0)
snprintf(stats + sizeof(NUM) + sizeof(SPACE) - 2,
sizeof(NUM), FMT(kbout), kbout);
else
strcpy(stats + sizeof(NUM) + sizeof(SPACE) - 2, NA);
if (pos == 0 && ptr != ifs->first)
print_wrap(options, ++line);
else if (pos > 0)
fputs(SPACE, stdout);
len = LEN(options, ptr->namelen);
print_center(stats, WIDTH, len);
pos = pos_next(pos, len, options);
}
termsize.datalines = line + 1;
if (!(options & OPT_NOSCROLL))
putc('\n', stdout);
if (hasindex && !(options & OPT_NOINDEX))
ifs->flags |= IFSTAT_HASINDEX;
else
ifs->flags &= ~IFSTAT_HASINDEX;
}
static void filter_interfaces(struct ifstat_list *ifs, int options) {
struct ifstat_data *cur, *next, *parent;
cur = ifs->first;
parent = NULL;
while (cur != NULL) {
if (!(cur->flags & IFSTAT_HASSTATS) ||
((options & OPT_NONULL) && cur->bin == 0 && cur->bout == 0)) {
next = cur->next;
if (parent != NULL)
parent->next = next;
else
ifs->first = next;
ifstat_free_interface(cur);
cur = next;
} else {
parent = cur;
cur = cur->next;
}
}
}
static void needarg(char opt, int arg, int argc) {
if (arg + 1 >= argc) {
fprintf(stderr, "%s: option '%c' requires an argument!\n", ifstat_progname, opt);
usage(EXIT_FAILURE);
}
}
static double getdelay(char *string) {
double delay;
if ((delay = atof(string)) < 0.1) {
fprintf(stderr, "%s: bad or too short delay '%s'!\n", ifstat_progname, string);
exit(EXIT_FAILURE);
}
return delay;
}
/* computes time remaining before start + delay */
static int notdone(struct timeval *start, struct timeval *tv_delay,
struct timeval *remains) {
struct timeval now;
struct timeval end;
gettimeofday(&now, NULL);
end.tv_sec = start->tv_sec + tv_delay->tv_sec;
end.tv_usec = start->tv_usec + tv_delay->tv_usec;
if (end.tv_usec >= 1000000) {
end.tv_sec += (end.tv_usec / 1000000);
end.tv_usec %= 1000000;
}
remains->tv_sec = end.tv_sec - now.tv_sec;
remains->tv_usec = end.tv_usec - now.tv_usec;
if (remains->tv_usec < 0) {
remains->tv_sec--;
remains->tv_usec += 1000000;
}
return (remains->tv_sec >= 0);
}
int main(int argc, char **argv) {
struct ifstat_list ifs;
struct ifstat_driver driver;
int arg, iter, lasthdr;
char *opt;
char *dname = NULL;
char *dopts = NULL;
double delay = 1, first_delay = 1;
int count = 0;
int options = 0;
struct timeval start, tv_delay, tv;
if ((ifstat_progname = strrchr(argv[0], '/')) != NULL)
ifstat_progname++;
else
ifstat_progname = argv[0];
ifs.flags = 0;
ifs.first = NULL;
/* parse options */
for (arg = 1; arg < argc; arg++) {
if (argv[arg][0] != '-' || argv[arg][1] == '\0')
break;
opt = argv[arg]+1;
while (*opt) {
switch(*opt) {
case 'a':
ifs.flags |= IFSTAT_LOOPBACK|IFSTAT_DOWN;
break;
case 'l':
ifs.flags |= IFSTAT_LOOPBACK;
break;
case 'v':
printf("ifstat version %s.\n"
"Copyright (C) 2001-2003, Gal Roualland <gael.roualland@dial.oleane.com>\n",
ifstat_version);
opt = ifstat_list_drivers();
printf("Compiled-in drivers: %s.\n", (opt != NULL) ? opt : "");
free(opt);
exit(EXIT_SUCCESS);
case 'A':
options |= OPT_NOINDEX;
break;
case 'n':
options |= OPT_NOTITLE;
break;
case 't':
options |= OPT_TIMESTAMP;
break;
case 'w':
options |= OPT_FIXEDWIDTH;
break;
case 'b':
options |= OPT_UNITBITS;
break;
case 'z':
options |= OPT_NONULL;
break;
case 'W':
options |= OPT_WRAP|OPT_FIXEDWIDTH;
break;
case 'T':
ifs.flags |= IFSTAT_TOTAL;
break;
case 'S':
options |= OPT_NOSCROLL|OPT_NOTITLE;
break;
case 'd':
needarg(*opt, arg, argc);
dname = argv[++arg];
if ((dopts = strchr(dname, ':')) != NULL)
*dopts++ = '\0';
break;
case 'i':
needarg(*opt, arg, argc);
if (!parse_interfaces(argv[++arg], &ifs)) {
fprintf(stderr, "%s: error parsing interface list.\n", ifstat_progname);
exit(EXIT_FAILURE);
}
options |= OPT_NOSCAN;
break;
case 's':
needarg(*opt, arg, argc);
dname = "snmp";
dopts = argv[++arg];
break;
case 'q':
ifstat_quiet = 1;
break;
case 'h':
usage(EXIT_SUCCESS);
default:
fprintf(stderr, "%s: invalid option '-%c'.\n", ifstat_progname, *opt);
usage(EXIT_FAILURE);
}
opt++;
}
}
if (options & OPT_NOSCROLL)
options &= ~OPT_WRAP;
/* has delay ? */
if (arg < argc) {
if ((opt = strchr(argv[arg], '/')) != NULL)
*opt++ = '\0';
first_delay = getdelay(argv[arg]);
delay = (opt != NULL) ? getdelay(opt) : first_delay;
arg++;
}
/* has count ? */
if (arg < argc) {
if ((count = atoi(argv[arg])) <= 0) {
fprintf(stderr, "%s: bad count '%s'!\n", ifstat_progname, argv[arg]);
return EXIT_FAILURE;
}
arg++;
}
/* extra arguments */
if (arg < argc) {
fprintf(stderr, "%s: too many arguments!\n", ifstat_progname);
return EXIT_FAILURE;
}
/* look for driver */
if (!ifstat_get_driver(dname, &driver)) {
fprintf(stderr, "%s: driver %s not available in this binary!\n", ifstat_progname, dname);
return EXIT_FAILURE;
}
/* init driver */
if (driver.open_driver != NULL &&
!driver.open_driver(&driver, dopts))
return EXIT_FAILURE;
if (ifs.first == NULL)
driver.scan_interfaces(&driver, &ifs);
/* poll interfaces for the first time */
if (ifs.first != NULL) {
if (driver.get_stats != NULL && !driver.get_stats(&driver, &ifs))
return EXIT_FAILURE;
gettimeofday(&start, NULL);
if (!(options & OPT_NOSCAN))
filter_interfaces(&ifs, options);
ifstat_reset_interfaces(&ifs);
}
if (ifs.first == NULL) {
fprintf(stderr, "%s: no interfaces to monitor!\n", ifstat_progname);
if (driver.close_driver != NULL)
driver.close_driver(&driver);
return EXIT_FAILURE;
}
if (ifs.flags & IFSTAT_TOTAL)
ifstat_add_interface(&ifs, "Total", IFSTAT_TOTAL);
/* update size of terminal if needed/possible */
if (!(options & OPT_NOTITLE) || (options & OPT_WRAP)) {
update_termsize(0);
#ifdef SIGWINCH
SIGNAL(SIGWINCH, &update_termsize);
#endif
}
#ifdef SIGCONT
/* register SIGCONT for redisplay of header */
if (!(options & OPT_NOTITLE) || (options & OPT_NOSCROLL))
SIGNAL(SIGCONT, &sigcont);
#endif
print_header(&ifs, options);
lasthdr = 1;
tv_delay.tv_sec = (int) first_delay;
tv_delay.tv_usec = (int) ((first_delay - tv_delay.tv_sec) * 1000000);
for (iter = 1; count == 0 || iter <= count; iter++) {
if (iter == 2 && first_delay != delay) {
tv_delay.tv_sec = (int) delay;
tv_delay.tv_usec = (int) ((delay - tv_delay.tv_sec) * 1000000);
}
tv = tv_delay;
while (select(0, NULL, NULL, NULL, &tv) != 0 && _sigwinch
&& notdone(&start, &tv_delay, &tv))
/* restart select if interrupted by sigwinch */
_sigwinch = 0;
if (_sigcont ||
(!(options & OPT_NOTITLE) &&
termsize.lines > (3 * termsize.datalines) &&
(iter - lasthdr) * termsize.datalines >=
(termsize.lines - (3 * termsize.datalines)))) {
print_header(&ifs, options);
lasthdr = iter;
_sigcont = 0;
}
if (driver.get_stats != NULL && !driver.get_stats(&driver, &ifs))
return EXIT_FAILURE;
gettimeofday(&tv, NULL);
print_stats(&ifs, &start, &tv, options);
start = tv;
fflush(stdout);
}
if (driver.close_driver != NULL)
driver.close_driver(&driver);
return EXIT_SUCCESS;
}
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