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sadc.c
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/*
* sadc: system activity data collector
* (C) 1999-2015 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;
int optz = 0;
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];
unsigned int vol_id_seq[NR_ACT];
extern struct activity *act[];
extern __nr_t (*f_count[]) (struct activity *);
struct sigaction alrm_act, int_act;
int sigint_caught = 0;
/*
***************************************************************************
* 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> ] [ -D ] [ -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/filesystem activities */
collect_group_activities(G_DISK + G_XDISK, 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++) {
if (!strcmp(p, K_ALL) && (act[i]->group & G_XDISK))
/*
* Don't select G_XDISK activities
* when option -S ALL is used.
*/
continue;
act[i]->options |= AO_COLLECTED;
}
if (!strcmp(p, K_XALL)) {
/* Tell sadc to also collect partition statistics */
collect_group_activities(G_DISK + G_XDISK, AO_F_DISK_PART);
}
}
else if (strspn(p, DIGITS) == strlen(p)) {
/*
* 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(p);
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. No need to reset handler here.
*
* IN:
* @sig Signal number.
***************************************************************************
*/
void alarm_handler(int sig)
{
alarm(interval);
}
/*
***************************************************************************
* SIGINT signal handler.
*
* IN:
* @sig Signal number.
***************************************************************************
*/
void int_handler(int sig)
{
pid_t ppid = getppid();
sigint_caught = 1;
if (!optz || (ppid == 1)) {
/* sadc hasn't been called by sar or sar process is already dead */
exit(1);
}
/*
* When starting sar then pressing ctrl/c, SIGINT is received
* by sadc, not sar. So send SIGINT to sar so that average stats
* can be displayed.
*/
if (kill(ppid, SIGINT) < 0) {
exit(1);
}
}
/*
***************************************************************************
* 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,
(size_t) act[i]->msize * (size_t) act[i]->nr * (size_t) act[i]->nr2);
}
}
}
/*
***************************************************************************
* Allocate and init structures, according to system state.
***************************************************************************
*/
void sa_sys_init(void)
{
int i, idx;
__nr_t f_count_results[NR_F_COUNT];
/* Init array. Means that no items have been counted yet */
for (i = 0; i < NR_F_COUNT; i++) {
f_count_results[i] = -1;
}
for (i = 0; i < NR_ACT; i++) {
idx = act[i]->f_count_index;
if (idx >= 0) {
/* Number of items is not a constant and should be calculated */
if (f_count_results[idx] >= 0) {
act[i]->nr = f_count_results[idx];
}
else {
act[i]->nr = (f_count[idx])(act[i]);
f_count_results[idx] = act[i]->nr;
}
}
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,
(size_t) act[i]->msize * (size_t) act[i]->nr * (size_t) 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)
{
memset(file_magic, 0, FILE_MAGIC_SIZE);
file_magic->header_size = FILE_HEADER_SIZE;
file_magic->sysstat_magic = SYSSTAT_MAGIC;
file_magic->format_magic = FORMAT_MAGIC;
enum_version_nr(file_magic);
}
/*
***************************************************************************
* 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 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 (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, 0);
/* OK, now fill the header */
file_hdr.sa_act_nr = get_activity_nr(act, AO_COLLECTED, COUNT_ACTIVITIES);
file_hdr.sa_vol_act_nr = get_activity_nr(act, AO_COLLECTED + AO_VOLATILE,
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);
/*
* This is a new file (or stdout): Field sa_last_cpu_nr is set to the number
* of CPU items of the machine (1 .. CPU_NR + 1).
* A_CPU activity is always collected, hence its number of items is
* always counted (in sa_sys_init()).
*/
file_hdr.sa_last_cpu_nr = act[get_activity_position(act, A_CPU, EXIT_IF_NOT_FOUND)]->nr;
/* 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 (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], RESUME_IF_NOT_FOUND)) < 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 (write_all(fd, &file_act, FILE_ACTIVITY_SIZE)
!= FILE_ACTIVITY_SIZE)
goto write_error;
/* Create sequence of volatile activities */
if (IS_VOLATILE(act[p]->options)) {
vol_id_seq[i] = act[p]->id;
}
}
}
return;
write_error:
fprintf(stderr, _("Cannot write system activity file header: %s\n"),
strerror(errno));
exit(2);
}
/*
***************************************************************************
* Write the volatile activity structures following each restart mark.
* sa_vol_act_nr structures have to be written.
* Note that volatile activities written after the restart marks may be
* different within the same file if different versions of sysstat have been
* used to create the file and then to append data to it.
*
* IN:
* @ofd Output file descriptor.
***************************************************************************
*/
void write_vol_act_structures(int ofd)
{
struct file_activity file_act;
int i, p;
memset(&file_act, 0, FILE_ACTIVITY_SIZE);
for (i = 0; i < file_hdr.sa_vol_act_nr; i++) {
if (!vol_id_seq[i]) {
/*
* Write an empty structure when current sysstat
* version knows fewer volatile activities than
* the number saved in file's header.
*/
file_act.id = file_act.nr = 0;
}
else {
p = get_activity_position(act, vol_id_seq[i], EXIT_IF_NOT_FOUND);
/*
* All the fields in file_activity structure are not used.
* In particular, act[p]->nr2 is left unmodified.
*/
file_act.id = act[p]->id;
file_act.nr = act[p]->nr;
}
if (write_all(ofd, &file_act, FILE_ACTIVITY_SIZE) != FILE_ACTIVITY_SIZE) {
p_write_error();
}
}
}
/*
***************************************************************************
* 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)
{
struct tm rectime = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL};
/* 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, 0);
record_hdr.hour = rectime.tm_hour;
record_hdr.minute = rectime.tm_min;
record_hdr.second = rectime.tm_sec;
/* Write record now */
if (write_all(ofd, &record_hdr, RECORD_HEADER_SIZE) != RECORD_HEADER_SIZE) {
p_write_error();
}
if (rtype == R_RESTART) {
/* Also write the volatile activities structures */
write_vol_act_structures(ofd);
}
else if (rtype == R_COMMENT) {
/* Also write the comment */
if (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, 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 (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], RESUME_IF_NOT_FOUND)) < 0)
continue;
if (IS_COLLECTED(act[p]->options)) {
if (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();
}
}
}
}
/*
***************************************************************************
* Rewrite file's header. Done when number of CPU has changed.
*
* IN:
* @ofd Output file descriptor.
* @fpos Position in file where header structure has to be written.
* @file_magic File magic structure.
***************************************************************************
*/
void rewrite_file_hdr(int *ofd, off_t fpos, struct file_magic *file_magic)
{
int n;
/* Remove O_APPEND status flag */
if (fcntl(*ofd, F_SETFL, 0) < 0) {
perror("fcntl");
exit(2);
}
/* Now rewrite file's header with its new CPU number value */
if (lseek(*ofd, fpos, SEEK_SET) < fpos) {
perror("lseek");
exit(2);
}
n = MINIMUM(file_magic->header_size, FILE_HEADER_SIZE);
if (write_all(*ofd, &file_hdr, n) != n) {
p_write_error();
}
/* Restore O_APPEND status flag */
if (fcntl(*ofd, F_SETFL, O_APPEND) < 0) {
perror("fcntl");
exit(2);
}
}
/*
***************************************************************************
* 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.
* @restart_mark TRUE if sadc called with interval (and count) not
* set, and no comment given (so we are going to insert
* a restart mark into the file).
*
* OUT:
* @ofd Output file descriptor.
***************************************************************************
*/
void open_ofile(int *ofd, char ofile[], int restart_mark)
{
struct file_magic file_magic;
struct file_activity file_act[NR_ACT];
struct tm rectime = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL};
void *buffer = NULL;
ssize_t sz, n;
off_t fpos;
int i, j, p;
if (!ofile[0])
return;
/* Try to open file and check that data can be appended to it */
if ((*ofd = open(ofile, O_APPEND | O_RDWR)) < 0) {
if (errno == ENOENT) {
/* File doesn't exist: Create it */
create_sa_file(ofd, ofile);
return;
}
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) ||
(file_magic.header_size > MAX_FILE_HEADER_SIZE)) {
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);
}
SREALLOC(buffer, char, file_magic.header_size);
/*
* Save current file position.
* Needed later to update sa_last_cpu_nr.
*/
if ((fpos = lseek(*ofd, 0, SEEK_CUR)) < 0) {
perror("lseek");
exit(2);
}
/* Read file standard header */
n = read(*ofd, buffer, file_magic.header_size);
memcpy(&file_hdr, buffer, MINIMUM(file_magic.header_size, FILE_HEADER_SIZE));
free(buffer);
if (n != file_magic.header_size) {
/* Display error message and exit */
handle_invalid_sa_file(ofd, &file_magic, ofile, 0);
}
/*
* If we are using the standard daily data file (file specified
* as "-" on the command line) and it is from a past month,
* then overwrite (truncate) it.
*/
get_time(&rectime, 0);
if (((file_hdr.sa_month != rectime.tm_mon) ||
(file_hdr.sa_year != rectime.tm_year)) &&
WANT_SA_ROTAT(flags)) {
close(*ofd);
create_sa_file(ofd, ofile);
return;
}
/* OK: It's a true system activity file */
if (!file_hdr.sa_act_nr || (file_hdr.sa_act_nr > NR_ACT) ||
(file_hdr.sa_vol_act_nr > NR_ACT))
/*
* No activities at all or at least one unknown activity,
* or too many volatile activities:
* Cannot append data to such a file.
*/
goto append_error;
for (i = 0; i < file_hdr.sa_act_nr; i++) {
/* Read current activity in list */
if (read(*ofd, &file_act[i], FILE_ACTIVITY_SIZE) != FILE_ACTIVITY_SIZE) {
handle_invalid_sa_file(ofd, &file_magic, ofile, 0);
}
p = get_activity_position(act, file_act[i].id, RESUME_IF_NOT_FOUND);
if ((p < 0) || (act[p]->fsize != file_act[i].size) ||
(act[p]->magic != file_act[i].magic))
/*
* Unknown activity in list or item size has changed or
* unknown activity format: Cannot append data to such a file.
*/
goto append_error;
if ((file_act[i].nr <= 0) || (file_act[i].nr2 <= 0) ||
(file_act[i].nr > act[p]->nr_max) ||
(file_act[i].nr2 > NR2_MAX)) {
/*
* Number of items and subitems should never be zero (or negative)
* or greater than their upper limit.
*/
goto append_error;
}
}
/*
* OK: (Almost) all tests successfully passed.
* 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;
}
j = 0;
for (i = 0; i < file_hdr.sa_act_nr; i++) {
p = get_activity_position(act, file_act[i].id, EXIT_IF_NOT_FOUND);
/*
* Force number of items (serial lines, network interfaces...)
* and sub-items to that of the file, and reallocate structures.
* Exceptions are volatile activities, for which number of items
* is kept unmodified unless its value was zero (in this case,
* it is also forced to the value of the file).
* Also keep in mind that the file cannot contain more than
* sa_vol_act_nr volatile activities.
*/
if (!IS_VOLATILE(act[p]->options) || !act[p]->nr || (j >= file_hdr.sa_vol_act_nr)) {
act[p]->nr = file_act[i].nr;
}
else {
vol_id_seq[j++] = file_act[i].id;
}
act[p]->nr2 = file_act[i].nr2;
SREALLOC(act[p]->_buf0, void,
(size_t) act[p]->msize * (size_t) act[p]->nr * (size_t) act[p]->nr2);
/* Save activity sequence */
id_seq[i] = file_act[i].id;
act[p]->options |= AO_COLLECTED;
}
while (j < file_hdr.sa_vol_act_nr) {
vol_id_seq[j++] = 0;
}
p = get_activity_position(act, A_CPU, EXIT_IF_NOT_FOUND);
if (!IS_COLLECTED(act[p]->options)) {
/* A_CPU activity should always exist in file */
goto append_error;
}
if (act[p]->nr != file_hdr.sa_last_cpu_nr) {
if (restart_mark) {
/*
* We are inserting a restart mark, and current machine
* has a different number of CPU than that saved in file,
* so update sa_last_cpu_nr in file's header and rewrite it.
*/
file_hdr.sa_last_cpu_nr = act[p]->nr;
rewrite_file_hdr(ofd, fpos, &file_magic);
}
else {
/*