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sadc.c
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sadc.c
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/*
* sadc: system activity data collector
* (C) 1999-2011 by Sebastien GODARD (sysstat <at> orange.fr)
*
***************************************************************************
* 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 the implied warranty of MERCHANTABILITY *
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License *
* for more details. *
* *
* You should have received a copy of the GNU General Public License along *
* with this program; if not, write to the Free Software Foundation, Inc., *
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
***************************************************************************
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#include <errno.h>
#include <signal.h>
#include <dirent.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/utsname.h>
#include "version.h"
#include "sa.h"
#include "rd_stats.h"
#include "common.h"
#include "ioconf.h"
#ifdef USE_NLS
#include <locale.h>
#include <libintl.h>
#define _(string) gettext(string)
#else
#define _(string) (string)
#endif
#ifdef HAVE_SENSORS
#include "sensors/sensors.h"
#include "sensors/error.h"
#endif
#define SCCSID "@(#)sysstat-" VERSION ": " __FILE__ " compiled " __DATE__ " " __TIME__
char *sccsid(void) { return (SCCSID); }
long interval = 0;
unsigned int flags = 0;
int dis;
char timestamp[2][TIMESTAMP_LEN];
struct file_header file_hdr;
struct record_header record_hdr;
char comment[MAX_COMMENT_LEN];
unsigned int id_seq[NR_ACT];
extern struct activity *act[];
/*
***************************************************************************
* Print usage and exit.
*
* IN:
* @progname Name of sysstat command
***************************************************************************
*/
void usage(char *progname)
{
fprintf(stderr, _("Usage: %s [ options ] [ <interval> [ <count> ] ] [ <outfile> ]\n"),
progname);
fprintf(stderr, _("Options are:\n"
"[ -C <comment> ] [ -F ] [ -L ] [ -V ]\n"
"[ -S { INT | DISK | IPV6 | POWER | SNMP | XDISK | ALL | XALL } ]\n"));
exit(1);
}
/*
***************************************************************************
* Collect all activities belonging to a group.
*
* IN:
* @group_id Group identification number.
* @opt_f Optionnal flag to set.
***************************************************************************
*/
void collect_group_activities(unsigned int group_id, unsigned int opt_f)
{
int i;
for (i = 0; i < NR_ACT; i++) {
if (act[i]->group & group_id) {
act[i]->options |= AO_COLLECTED;
if (opt_f) {
act[i]->opt_flags |= opt_f;
}
}
}
}
/*
***************************************************************************
* Parse option -S, indicating which activities are to be collected.
*
* IN:
* @argv Arguments list.
* @opt Index in list of arguments.
***************************************************************************
*/
void parse_sadc_S_option(char *argv[], int opt)
{
char *p;
int i;
for (p = strtok(argv[opt], ","); p; p = strtok(NULL, ",")) {
if (!strcmp(p, K_INT)) {
/* Select group of interrupt activities */
collect_group_activities(G_INT, AO_F_NULL);
}
else if (!strcmp(p, K_DISK)) {
/* Select group of disk activities */
collect_group_activities(G_DISK, AO_F_NULL);
}
else if (!strcmp(p, K_XDISK)) {
/* Select group of disk and partition activities */
collect_group_activities(G_DISK, AO_F_DISK_PART);
}
else if (!strcmp(p, K_SNMP)) {
/* Select group of SNMP activities */
collect_group_activities(G_SNMP, AO_F_NULL);
}
else if (!strcmp(p, K_IPV6)) {
/* Select group of IPv6 activities */
collect_group_activities(G_IPV6, AO_F_NULL);
}
else if (!strcmp(p, K_POWER)) {
/* Select group of activities related to power management */
collect_group_activities(G_POWER, AO_F_NULL);
}
else if (!strcmp(p, K_ALL) || !strcmp(p, K_XALL)) {
/* Select all activities */
for (i = 0; i < NR_ACT; i++) {
act[i]->options |= AO_COLLECTED;
}
if (!strcmp(p, K_XALL)) {
/* Tell sadc to also collect partition statistics */
collect_group_activities(G_DISK, AO_F_DISK_PART);
}
}
else if (strspn(argv[opt], DIGITS) == strlen(argv[opt])) {
/*
* Although undocumented, option -S followed by a numerical value
* enables the user to select each activity that should be
* collected. "-S 0" unselects all activities but CPU.
* A value greater than 255 enables the user to select groups
* of activities.
*/
int act_id;
act_id = atoi(argv[opt]);
if (act_id > 255) {
act_id >>= 8;
for (i = 0; i < NR_ACT; i++) {
if (act[i]->group & act_id) {
act[i]->options |= AO_COLLECTED;
}
}
}
else if ((act_id < 0) || (act_id > NR_ACT)) {
usage(argv[0]);
}
else if (!act_id) {
/* Unselect all activities but CPU */
for (i = 0; i < NR_ACT; i++) {
act[i]->options &= ~AO_COLLECTED;
}
COLLECT_ACTIVITY(A_CPU);
}
else {
/* Select chosen activity */
COLLECT_ACTIVITY(act_id);
}
}
else {
usage(argv[0]);
}
}
}
/*
***************************************************************************
* SIGALRM signal handler.
*
* IN:
* @sig Signal number. Set to 0 for the first time, then to SIGALRM.
***************************************************************************
*/
void alarm_handler(int sig)
{
signal(SIGALRM, alarm_handler);
alarm(interval);
}
/*
***************************************************************************
* Display an error message.
***************************************************************************
*/
void p_write_error(void)
{
fprintf(stderr, _("Cannot write data to system activity file: %s\n"),
strerror(errno));
exit(2);
}
/*
***************************************************************************
* Init structures. All of them are init'ed first when they are allocated
* (done by SREALLOC() macro in sa_sys_init() function).
* Then, they are init'ed again each time before reading the various system
* stats to make sure that no stats from a previous reading will remain (eg.
* if some network interfaces or block devices have been unregistered).
***************************************************************************
*/
void reset_stats(void)
{
int i;
for (i = 0; i < NR_ACT; i++) {
if ((act[i]->nr > 0) && act[i]->_buf0) {
memset(act[i]->_buf0, 0, act[i]->msize * act[i]->nr * act[i]->nr2);
}
}
}
/*
***************************************************************************
* Allocate and init structures, according to system state.
***************************************************************************
*/
void sa_sys_init(void)
{
int i;
for (i = 0; i < NR_ACT; i++) {
if (act[i]->f_count) {
/* Number of items is not a constant and should be calculated */
act[i]->nr = (*act[i]->f_count)(act[i]);
}
if (act[i]->nr > 0) {
if (act[i]->f_count2) {
act[i]->nr2 = (*act[i]->f_count2)(act[i]);
}
/* else act[i]->nr2 is a constant and doesn't need to be calculated */
if (!act[i]->nr2) {
act[i]->nr = 0;
}
}
if (act[i]->nr > 0) {
/* Allocate structures for current activity */
SREALLOC(act[i]->_buf0, void, act[i]->msize * act[i]->nr * act[i]->nr2);
}
else {
/* No items found: Invalidate current activity */
act[i]->options &= ~AO_COLLECTED;
}
/* Set default activity list */
id_seq[i] = act[i]->id;
}
}
/*
***************************************************************************
* Free structures.
***************************************************************************
*/
void sa_sys_free(void)
{
int i;
for (i = 0; i < NR_ACT; i++) {
if (act[i]->nr > 0) {
if (act[i]->_buf0) {
free(act[i]->_buf0);
act[i]->_buf0 = NULL;
}
}
}
}
/*
***************************************************************************
* Write data to file. If the write() call was interrupted by a signal, try
* again so that the whole buffer can be written.
*
* IN:
* @fd Output file descriptor.
* @buf Data buffer.
* @nr_bytes Number of bytes to write.
*
* RETURNS:
* Number of bytes written to file, or -1 on error.
***************************************************************************
*/
int write_all(int fd, const void *buf, int nr_bytes)
{
int block, offset = 0;
char *buffer = (char *) buf;
while (nr_bytes > 0) {
block = write(fd, &buffer[offset], nr_bytes);
if (block < 0) {
if (errno == EINTR)
continue;
return block;
}
if (block == 0)
return offset;
offset += block;
nr_bytes -= block;
}
return offset;
}
/*
***************************************************************************
* If -L option used, request a non-blocking, exclusive lock on the file.
* If lock would block, then another process (possibly sadc) has already
* opened that file => exit.
*
* IN:
* @fd Output file descriptor.
* @fatal Indicate if failing to lock file should be fatal or not.
* If it's not fatal then we'll wait for next iteration and
* try again.
*
* RETURNS:
* 0 on success, or 1 if file couldn't be locked.
***************************************************************************
*/
int ask_for_flock(int fd, int fatal)
{
/* Option -L may be used only if an outfile was specified on the command line */
if (LOCK_FILE(flags)) {
/*
* Yes: Try to lock file. To make code portable, check for both EWOULDBLOCK
* and EAGAIN return codes, and treat them the same (glibc documentation).
* Indeed, some Linux ports (e.g. hppa-linux) do not equate EWOULDBLOCK and
* EAGAIN like every other Linux port.
*/
if (flock(fd, LOCK_EX | LOCK_NB) < 0) {
if ((((errno == EWOULDBLOCK) || (errno == EAGAIN)) && (fatal == FATAL)) ||
((errno != EWOULDBLOCK) && (errno != EAGAIN))) {
perror("flock");
exit(1);
}
/* Was unable to lock file: Lock would have blocked... */
return 1;
}
else {
/* File successfully locked */
flags |= S_F_FILE_LOCKED;
}
}
return 0;
}
/*
***************************************************************************
* Fill system activity file magic header.
*
* IN:
* @file_magic System activity file magic header.
***************************************************************************
*/
void fill_magic_header(struct file_magic *file_magic)
{
char *v;
char version[16];
memset(file_magic, 0, FILE_MAGIC_SIZE);
file_magic->sysstat_magic = SYSSTAT_MAGIC;
file_magic->format_magic = FORMAT_MAGIC;
file_magic->sysstat_extraversion = 0;
strcpy(version, VERSION);
/* Get version number */
if ((v = strtok(version, ".")) == NULL)
return;
file_magic->sysstat_version = atoi(v) & 0xff;
/* Get patchlevel number */
if ((v = strtok(NULL, ".")) == NULL)
return;
file_magic->sysstat_patchlevel = atoi(v) & 0xff;
/* Get sublevel number */
if ((v = strtok(NULL, ".")) == NULL)
return;
file_magic->sysstat_sublevel = atoi(v) & 0xff;
/* Get extraversion number. Don't necessarily exist */
if ((v = strtok(NULL, ".")) == NULL)
return;
file_magic->sysstat_extraversion = atoi(v) & 0xff;
}
/*
***************************************************************************
* Fill system activity file header, then write it (or print it if stdout).
*
* IN:
* @fd Output file descriptor. May be stdout.
***************************************************************************
*/
void setup_file_hdr(int fd)
{
int n, i, p;
struct tm rectime;
struct utsname header;
struct file_magic file_magic;
struct file_activity file_act;
/* Fill then write file magic header */
fill_magic_header(&file_magic);
if ((n = write_all(fd, &file_magic, FILE_MAGIC_SIZE)) != FILE_MAGIC_SIZE)
goto write_error;
/* First reset the structure */
memset(&file_hdr, 0, FILE_HEADER_SIZE);
/* Then get current date */
file_hdr.sa_ust_time = get_time(&rectime);
/* OK, now fill the header */
file_hdr.sa_nr_act = get_activity_nr(act, AO_COLLECTED, COUNT_ACTIVITIES);
file_hdr.sa_day = rectime.tm_mday;
file_hdr.sa_month = rectime.tm_mon;
file_hdr.sa_year = rectime.tm_year;
file_hdr.sa_sizeof_long = sizeof(long);
/* Get system name, release number, hostname and machine architecture */
uname(&header);
strncpy(file_hdr.sa_sysname, header.sysname, UTSNAME_LEN);
file_hdr.sa_sysname[UTSNAME_LEN - 1] = '\0';
strncpy(file_hdr.sa_nodename, header.nodename, UTSNAME_LEN);
file_hdr.sa_nodename[UTSNAME_LEN - 1] = '\0';
strncpy(file_hdr.sa_release, header.release, UTSNAME_LEN);
file_hdr.sa_release[UTSNAME_LEN - 1] = '\0';
strncpy(file_hdr.sa_machine, header.machine, UTSNAME_LEN);
file_hdr.sa_machine[UTSNAME_LEN - 1] = '\0';
/* Write file header */
if ((n = write_all(fd, &file_hdr, FILE_HEADER_SIZE)) != FILE_HEADER_SIZE)
goto write_error;
/* Write activity list */
for (i = 0; i < NR_ACT; i++) {
/*
* Activity sequence given by id_seq array.
* Sequence must be the same for stdout as for output file.
*/
if (!id_seq[i])
continue;
if ((p = get_activity_position(act, id_seq[i])) < 0)
continue;
if (IS_COLLECTED(act[p]->options)) {
file_act.id = act[p]->id;
file_act.magic = act[p]->magic;
file_act.nr = act[p]->nr;
file_act.nr2 = act[p]->nr2;
file_act.size = act[p]->fsize;
if ((n = write_all(fd, &file_act, FILE_ACTIVITY_SIZE))
!= FILE_ACTIVITY_SIZE)
goto write_error;
}
}
return;
write_error:
fprintf(stderr, _("Cannot write system activity file header: %s\n"),
strerror(errno));
exit(2);
}
/*
***************************************************************************
* sadc called with interval and count parameters not set:
* Write a dummy record notifying a system restart, or insert a comment in
* binary data file if option -C has been used.
* Writing a dummy record should typically be done at boot time,
* before the cron daemon is started to avoid conflict with sa1/sa2 scripts.
*
* IN:
* @ofd Output file descriptor.
* @rtype Record type to write (dummy or comment).
***************************************************************************
*/
void write_special_record(int ofd, int rtype)
{
int n;
struct tm rectime;
/* Check if file is locked */
if (!FILE_LOCKED(flags)) {
ask_for_flock(ofd, FATAL);
}
/* Reset the structure (not compulsory, but a bit cleaner) */
memset(&record_hdr, 0, RECORD_HEADER_SIZE);
/* Set record type */
record_hdr.record_type = rtype;
/* Save time */
record_hdr.ust_time = get_time(&rectime);
record_hdr.hour = rectime.tm_hour;
record_hdr.minute = rectime.tm_min;
record_hdr.second = rectime.tm_sec;
/* Write record now */
if ((n = write_all(ofd, &record_hdr, RECORD_HEADER_SIZE)) != RECORD_HEADER_SIZE) {
p_write_error();
}
if (rtype == R_COMMENT) {
/* Also write the comment */
if ((n = write_all(ofd, comment, MAX_COMMENT_LEN)) != MAX_COMMENT_LEN) {
p_write_error();
}
}
}
/*
***************************************************************************
* Write stats (or print them if stdout).
*
* IN:
* @ofd Output file descriptor. May be stdout.
***************************************************************************
*/
void write_stats(int ofd)
{
int i, n, p;
/* Try to lock file */
if (!FILE_LOCKED(flags)) {
if (ask_for_flock(ofd, NON_FATAL))
/*
* Unable to lock file:
* Wait for next iteration to try again to save data.
*/
return;
}
/* Write record header */
if ((n = write_all(ofd, &record_hdr, RECORD_HEADER_SIZE)) != RECORD_HEADER_SIZE) {
p_write_error();
}
/* Then write all statistics */
for (i = 0; i < NR_ACT; i++) {
if (!id_seq[i])
continue;
if ((p = get_activity_position(act, id_seq[i])) < 0)
continue;
if (IS_COLLECTED(act[p]->options)) {
if ((n = write_all(ofd, act[p]->_buf0, act[p]->fsize * act[p]->nr * act[p]->nr2)) !=
(act[p]->fsize * act[p]->nr * act[p]->nr2)) {
p_write_error();
}
}
}
}
/*
***************************************************************************
* Create a system activity daily data file.
*
* IN:
* @ofile Name of output file.
*
* OUT:
* @ofd Output file descriptor.
***************************************************************************
*/
void create_sa_file(int *ofd, char *ofile)
{
if ((*ofd = open(ofile, O_CREAT | O_WRONLY,
S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) < 0) {
fprintf(stderr, _("Cannot open %s: %s\n"), ofile, strerror(errno));
exit(2);
}
/* Try to lock file */
ask_for_flock(*ofd, FATAL);
/* Truncate file */
if (ftruncate(*ofd, 0) < 0) {
fprintf(stderr, _("Cannot open %s: %s\n"), ofile, strerror(errno));
exit(2);
}
/* Write file header */
setup_file_hdr(*ofd);
}
/*
***************************************************************************
* Get descriptor for stdout.
*
* IN:
* @stdfd A value >= 0 indicates that stats data should also
* be written to stdout.
*
* OUT:
* @stdfd Stdout file descriptor.
***************************************************************************
*/
void open_stdout(int *stdfd)
{
if (*stdfd >= 0) {
if ((*stdfd = dup(STDOUT_FILENO)) < 0) {
perror("dup");
exit(4);
}
/* Write file header on STDOUT */
setup_file_hdr(*stdfd);
}
}
/*
***************************************************************************
* Get descriptor for output file and write its header.
* We may enter this function several times (when we rotate a file).
*
* IN:
* @ofile Name of output file.
*
* OUT:
* @ofd Output file descriptor.
***************************************************************************
*/
void open_ofile(int *ofd, char ofile[])
{
struct file_magic file_magic;
struct file_activity file_act;
ssize_t sz;
int i, p;
if (ofile[0]) {
/* Does file exist? */
if (access(ofile, F_OK) < 0) {
/* NO: Create it */
create_sa_file(ofd, ofile);
}
else {
/* YES: Append data to it if possible */
if ((*ofd = open(ofile, O_APPEND | O_RDWR)) < 0) {
fprintf(stderr, _("Cannot open %s: %s\n"), ofile, strerror(errno));
exit(2);
}
/* Read file magic header */
sz = read(*ofd, &file_magic, FILE_MAGIC_SIZE);
if (!sz) {
close(*ofd);
/* This is an empty file: Create it again */
create_sa_file(ofd, ofile);
return;
}
if ((sz != FILE_MAGIC_SIZE) ||
(file_magic.sysstat_magic != SYSSTAT_MAGIC) ||
(file_magic.format_magic != FORMAT_MAGIC)) {
if (FORCE_FILE(flags)) {
close(*ofd);
/* -F option used: Truncate file */
create_sa_file(ofd, ofile);
return;
}
/* Display error message and exit */
handle_invalid_sa_file(ofd, &file_magic, ofile, sz);
}
/* Read file standard header */
if (read(*ofd, &file_hdr, FILE_HEADER_SIZE) != FILE_HEADER_SIZE) {
/* Display error message and exit */
handle_invalid_sa_file(ofd, &file_magic, ofile, 0);
}
/*
* OK: It's a true system activity file.
* List of activities from the file prevails over that of the user.
* So unselect all of them. And reset activity sequence.
*/
for (i = 0; i < NR_ACT; i++) {
act[i]->options &= ~AO_COLLECTED;
id_seq[i] = 0;
}
if (!file_hdr.sa_nr_act || (file_hdr.sa_nr_act > NR_ACT))
/*
* No activities at all or at least one unknown activity:
* Cannot append data to such a file.
*/
goto append_error;
for (i = 0; i < file_hdr.sa_nr_act; i++) {
/* Read current activity in list */
if (read(*ofd, &file_act, FILE_ACTIVITY_SIZE) != FILE_ACTIVITY_SIZE) {
handle_invalid_sa_file(ofd, &file_magic, ofile, 0);
}
p = get_activity_position(act, file_act.id);
if ((p < 0) || (act[p]->fsize != file_act.size) ||
(act[p]->magic != file_act.magic))
/*
* Unknown activity in list or item size has changed or
* unknown activity format.
*/
goto append_error;
if ((act[p]->nr != file_act.nr) || (act[p]->nr2 != file_act.nr2)) {
if (IS_REMANENT(act[p]->options) || !file_act.nr || !file_act.nr2)
/*
* Remanent structures cannot have a different number of items.
* Also number of items and subitems should never be null.
*/
goto append_error;
else {
/*
* Force number of items (serial lines, network interfaces...)
* and sub-items to that of the file, and reallocate structures.
*/
act[p]->nr = file_act.nr;
act[p]->nr2 = file_act.nr2;
SREALLOC(act[p]->_buf0, void, act[p]->msize * act[p]->nr * act[p]->nr2);
}
}
/* Save activity sequence */
id_seq[i] = file_act.id;
act[p]->options |= AO_COLLECTED;
}
}
}
return;
append_error:
close(*ofd);
if (FORCE_FILE(flags)) {
/* Truncate file */
create_sa_file(ofd, ofile);
}
else {
fprintf(stderr, _("Cannot append data to that file (%s)\n"), ofile);
exit(1);
}
}
/*
***************************************************************************
* Read statistics from various system files.
***************************************************************************
*/
void read_stats(void)
{
int i;
__nr_t cpu_nr = act[get_activity_position(act, A_CPU)]->nr;
/*
* Init uptime0. So if /proc/uptime cannot fill it,
* this will be done by /proc/stat.
* If cpu_nr = 2, force /proc/stat to fill it.
* If cpu_nr = 1, uptime0 and uptime are equal.
* NB: uptime0 is always filled.
* Remember that cpu_nr = 1 means one CPU and no SMP kernel
* (one structure for CPU "all") and cpu_nr = 2 means one CPU
* and an SMP kernel (two structures for CPUs "all" and "0").
*/
record_hdr.uptime0 = 0;
if (cpu_nr > 2) {
read_uptime(&(record_hdr.uptime0));
}
for (i = 0; i < NR_ACT; i++) {
if (IS_COLLECTED(act[i]->options)) {
/* Read statistics for current activity */
(*act[i]->f_read)(act[i]);
}
}
if (cpu_nr == 1) {
/*
* uptime has been filled by read_uptime()
* or when reading CPU stats from /proc/stat.
*/
record_hdr.uptime0 = record_hdr.uptime;
}
}
/*
***************************************************************************
* Main loop: Read stats from the relevant sources and display them.
*
* IN:
* @count Number of lines of stats to display.
* @rectime Current date and time.
* @stdfd Stdout file descriptor.
* @ofd Output file descriptor.
* @ofile Name of output file.
***************************************************************************
*/
void rw_sa_stat_loop(long count, struct tm *rectime, int stdfd, int ofd,
char ofile[])
{
int do_sa_rotat = 0;
unsigned int save_flags;
char new_ofile[MAX_FILE_LEN];
new_ofile[0] = '\0';
/* Main loop */
do {
/*
* Init all structures.
* Exception for individual CPUs structures which must not be
* init'ed to keep values for CPU before they were disabled.
*/
reset_stats();
/* Save time */
record_hdr.ust_time = get_time(rectime);
record_hdr.hour = rectime->tm_hour;
record_hdr.minute = rectime->tm_min;
record_hdr.second = rectime->tm_sec;
/* Set record type */
if (do_sa_rotat) {
record_hdr.record_type = R_LAST_STATS;
}
else {
record_hdr.record_type = R_STATS;
}
/* Read then write stats */
read_stats();
if (stdfd >= 0) {
save_flags = flags;
flags &= ~S_F_LOCK_FILE;
write_stats(stdfd);
flags = save_flags;
}
/* If the record type was R_LAST_STATS, tag it R_STATS before writing it */
record_hdr.record_type = R_STATS;
if (ofile[0]) {
write_stats(ofd);
}
if (do_sa_rotat) {
/*
* Stats are written at the end of previous file *and* at the
* beginning of the new one (outfile must have been specified
* as '-' on the command line).
*/
do_sa_rotat = FALSE;
if (fdatasync(ofd) < 0) {
/* Flush previous file */
perror("fdatasync");
exit(4);
}
close(ofd);
strcpy(ofile, new_ofile);
/* Recalculate number of system items and reallocate structures */
sa_sys_init();
/*
* Open and init new file.
* This is also used to set activity sequence to that of the file
* if the file already exists.
*/
open_ofile(&ofd, ofile);
/*
* Rewrite header and activity sequence to stdout since
* number of items may have changed.
*/
if (stdfd >= 0) {
setup_file_hdr(stdfd);
}
/* Write stats to file again */
write_stats(ofd);
}
/* Flush data */
fflush(stdout);
if (count > 0) {
count--;
}
if (count) {
pause();
}
/* Rotate activity file if necessary */
if (WANT_SA_ROTAT(flags)) {
/* The user specified '-' as the filename to use */
set_default_file(rectime, new_ofile);
if (strcmp(ofile, new_ofile)) {
do_sa_rotat = TRUE;
}
}
}
while (count);
/* Close file descriptors if they have actually been used */
CLOSE(stdfd);
CLOSE(ofd);
}
/*
***************************************************************************
* Main entry to the program.
***************************************************************************
*/
int main(int argc, char **argv)
{
int opt = 0, optz = 0;
char ofile[MAX_FILE_LEN];
struct tm rectime;
int stdfd = 0, ofd = -1;
long count = 0;
/* Get HZ */
get_HZ();
/* Compute page shift in kB */
get_kb_shift();
ofile[0] = comment[0] = '\0';
#ifdef HAVE_SENSORS
/* Initialize sensors, let it use the default cfg file */
int err = sensors_init(NULL);
if (err) {
fprintf(stderr, "sensors_init: %s\n", sensors_strerror(err));
}
#endif /* HAVE_SENSORS */
#ifdef USE_NLS
/* Init National Language Support */
init_nls();
#endif
while (++opt < argc) {
if (!strcmp(argv[opt], "-S")) {