637 lines
19 KiB
C
637 lines
19 KiB
C
/*
|
|
* This file contains changes from the Open Software Foundation.
|
|
*/
|
|
|
|
/*
|
|
|
|
Copyright 1988, 1989 by the Massachusetts Institute of Technology
|
|
|
|
Permission to use, copy, modify, and distribute this software
|
|
and its documentation for any purpose and without fee is
|
|
hereby granted, provided that the above copyright notice
|
|
appear in all copies and that both that copyright notice and
|
|
this permission notice appear in supporting documentation,
|
|
and that the names of M.I.T. and the M.I.T. S.I.P.B. not be
|
|
used in advertising or publicity pertaining to distribution
|
|
of the software without specific, written prior permission.
|
|
M.I.T. and the M.I.T. S.I.P.B. make no representations about
|
|
the suitability of this software for any purpose. It is
|
|
provided "as is" without express or implied warranty.
|
|
|
|
*/
|
|
|
|
/*
|
|
* newsyslog - roll over selected logs at the appropriate time,
|
|
* keeping the a specified number of backup files around.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static const char rcsid[] =
|
|
"$Id: newsyslog.c,v 1.14 1997/10/06 07:46:08 charnier Exp $";
|
|
#endif /* not lint */
|
|
|
|
#ifndef CONF
|
|
#define CONF "/etc/athena/newsyslog.conf" /* Configuration file */
|
|
#endif
|
|
#ifndef PIDFILE
|
|
#define PIDFILE "/etc/syslog.pid"
|
|
#endif
|
|
#ifndef COMPRESS_PATH
|
|
#define COMPRESS_PATH "/usr/ucb/compress" /* File compression program */
|
|
#endif
|
|
#ifndef COMPRESS_PROG
|
|
#define COMPRESS_PROG "compress"
|
|
#endif
|
|
#ifndef COMPRESS_POSTFIX
|
|
#define COMPRESS_POSTFIX ".Z"
|
|
#endif
|
|
|
|
#include <ctype.h>
|
|
#include <err.h>
|
|
#include <fcntl.h>
|
|
#include <grp.h>
|
|
#include <pwd.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <sys/time.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/param.h>
|
|
#include <sys/wait.h>
|
|
|
|
#define kbytes(size) (((size) + 1023) >> 10)
|
|
#ifdef _IBMR2
|
|
/* Calculates (db * DEV_BSIZE) */
|
|
#define dbtob(db) ((unsigned)(db) << UBSHIFT)
|
|
#endif
|
|
|
|
#define CE_COMPACT 1 /* Compact the achived log files */
|
|
#define CE_BINARY 2 /* Logfile is in binary, don't add */
|
|
/* status messages */
|
|
#define NONE -1
|
|
|
|
struct conf_entry {
|
|
char *log; /* Name of the log */
|
|
char *pid_file; /* PID file */
|
|
int uid; /* Owner of log */
|
|
int gid; /* Group of log */
|
|
int numlogs; /* Number of logs to keep */
|
|
int size; /* Size cutoff to trigger trimming the log */
|
|
int hours; /* Hours between log trimming */
|
|
int permissions; /* File permissions on the log */
|
|
int flags; /* Flags (CE_COMPACT & CE_BINARY) */
|
|
struct conf_entry *next; /* Linked list pointer */
|
|
};
|
|
|
|
int verbose = 0; /* Print out what's going on */
|
|
int needroot = 1; /* Root privs are necessary */
|
|
int noaction = 0; /* Don't do anything, just show it */
|
|
char *conf = CONF; /* Configuration file to use */
|
|
time_t timenow;
|
|
pid_t syslog_pid; /* read in from /etc/syslog.pid */
|
|
#define MIN_PID 5
|
|
#define MAX_PID 30000 /* was 65534, see /usr/include/sys/proc.h */
|
|
char hostname[MAXHOSTNAMELEN+1]; /* hostname */
|
|
char *daytime; /* timenow in human readable form */
|
|
|
|
#ifndef OSF
|
|
char *strdup(char *strp);
|
|
#endif
|
|
|
|
static struct conf_entry *parse_file();
|
|
static char *sob(char *p);
|
|
static char *son(char *p);
|
|
static char *missing_field(char *p,char *errline);
|
|
static void do_entry(struct conf_entry *ent);
|
|
static void PRS(int argc,char **argv);
|
|
static void usage();
|
|
static void dotrim(char *log,char *pid_file,int numdays,int falgs,int perm, int owner_uid,int group_gid);
|
|
static int log_trim(char *log);
|
|
static void compress_log(char *log);
|
|
static int sizefile(char *file);
|
|
static int age_old_log(char *file);
|
|
static pid_t get_pid(char *pid_file);
|
|
|
|
int main(argc,argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
struct conf_entry *p, *q;
|
|
|
|
PRS(argc,argv);
|
|
if (needroot && getuid() && geteuid())
|
|
errx(1, "must have root privs");
|
|
p = q = parse_file();
|
|
|
|
syslog_pid = needroot ? get_pid(PIDFILE) : 0;
|
|
|
|
while (p) {
|
|
do_entry(p);
|
|
p=p->next;
|
|
free((char *) q);
|
|
q=p;
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
static void do_entry(ent)
|
|
struct conf_entry *ent;
|
|
|
|
{
|
|
int size, modtime;
|
|
|
|
if (verbose) {
|
|
if (ent->flags & CE_COMPACT)
|
|
printf("%s <%dZ>: ",ent->log,ent->numlogs);
|
|
else
|
|
printf("%s <%d>: ",ent->log,ent->numlogs);
|
|
}
|
|
size = sizefile(ent->log);
|
|
modtime = age_old_log(ent->log);
|
|
if (size < 0) {
|
|
if (verbose)
|
|
printf("does not exist.\n");
|
|
} else {
|
|
if (verbose && (ent->size > 0))
|
|
printf("size (Kb): %d [%d] ", size, ent->size);
|
|
if (verbose && (ent->hours > 0))
|
|
printf(" age (hr): %d [%d] ", modtime, ent->hours);
|
|
if (((ent->size > 0) && (size >= ent->size)) ||
|
|
((ent->hours > 0) && ((modtime >= ent->hours)
|
|
|| (modtime < 0)))) {
|
|
if (verbose)
|
|
printf("--> trimming log....\n");
|
|
if (noaction && !verbose) {
|
|
if (ent->flags & CE_COMPACT)
|
|
printf("%s <%dZ>: trimming",
|
|
ent->log,ent->numlogs);
|
|
else
|
|
printf("%s <%d>: trimming",
|
|
ent->log,ent->numlogs);
|
|
}
|
|
dotrim(ent->log, ent->pid_file, ent->numlogs,
|
|
ent->flags, ent->permissions, ent->uid, ent->gid);
|
|
} else {
|
|
if (verbose)
|
|
printf("--> skipping\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
static void PRS(argc,argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
int c;
|
|
char *p;
|
|
|
|
timenow = time((time_t *) 0);
|
|
daytime = ctime(&timenow) + 4;
|
|
daytime[15] = '\0';
|
|
|
|
/* Let's get our hostname */
|
|
(void) gethostname(hostname, sizeof(hostname));
|
|
|
|
/* Truncate domain */
|
|
if ((p = strchr(hostname, '.'))) {
|
|
*p = '\0';
|
|
}
|
|
|
|
optind = 1; /* Start options parsing */
|
|
while ((c=getopt(argc,argv,"nrvf:t:")) != -1)
|
|
switch (c) {
|
|
case 'n':
|
|
noaction++; /* This implies needroot as off */
|
|
/* fall through */
|
|
case 'r':
|
|
needroot = 0;
|
|
break;
|
|
case 'v':
|
|
verbose++;
|
|
break;
|
|
case 'f':
|
|
conf = optarg;
|
|
break;
|
|
default:
|
|
usage();
|
|
}
|
|
}
|
|
|
|
static void usage()
|
|
{
|
|
fprintf(stderr, "usage: newsyslog [-nrv] [-f config-file]\n");
|
|
exit(1);
|
|
}
|
|
|
|
/* Parse a configuration file and return a linked list of all the logs
|
|
* to process
|
|
*/
|
|
static struct conf_entry *parse_file()
|
|
{
|
|
FILE *f;
|
|
char line[BUFSIZ], *parse, *q;
|
|
char *errline, *group;
|
|
struct conf_entry *first = NULL;
|
|
struct conf_entry *working = NULL;
|
|
struct passwd *pass;
|
|
struct group *grp;
|
|
int eol;
|
|
|
|
if (strcmp(conf,"-"))
|
|
f = fopen(conf,"r");
|
|
else
|
|
f = stdin;
|
|
if (!f)
|
|
err(1, "%s", conf);
|
|
while (fgets(line,BUFSIZ,f)) {
|
|
if ((line[0]== '\n') || (line[0] == '#'))
|
|
continue;
|
|
errline = strdup(line);
|
|
if (!first) {
|
|
working = (struct conf_entry *) malloc(sizeof(struct conf_entry));
|
|
first = working;
|
|
} else {
|
|
working->next = (struct conf_entry *) malloc(sizeof(struct conf_entry));
|
|
working = working->next;
|
|
}
|
|
|
|
q = parse = missing_field(sob(line),errline);
|
|
parse = son(line);
|
|
if (!*parse)
|
|
errx(1, "malformed line (missing fields):\n%s", errline);
|
|
*parse = '\0';
|
|
working->log = strdup(q);
|
|
|
|
q = parse = missing_field(sob(++parse),errline);
|
|
parse = son(parse);
|
|
if (!*parse)
|
|
errx(1, "malformed line (missing fields):\n%s", errline);
|
|
*parse = '\0';
|
|
if ((group = strchr(q, '.')) != NULL) {
|
|
*group++ = '\0';
|
|
if (*q) {
|
|
if (!(isnumber(*q))) {
|
|
if ((pass = getpwnam(q)) == NULL)
|
|
errx(1,
|
|
"error in config file; unknown user:\n%s",
|
|
errline);
|
|
working->uid = pass->pw_uid;
|
|
} else
|
|
working->uid = atoi(q);
|
|
} else
|
|
working->uid = NONE;
|
|
|
|
q = group;
|
|
if (*q) {
|
|
if (!(isnumber(*q))) {
|
|
if ((grp = getgrnam(q)) == NULL)
|
|
errx(1,
|
|
"error in config file; unknown group:\n%s",
|
|
errline);
|
|
working->gid = grp->gr_gid;
|
|
} else
|
|
working->gid = atoi(q);
|
|
} else
|
|
working->gid = NONE;
|
|
|
|
q = parse = missing_field(sob(++parse),errline);
|
|
parse = son(parse);
|
|
if (!*parse)
|
|
errx(1, "malformed line (missing fields):\n%s", errline);
|
|
*parse = '\0';
|
|
}
|
|
else
|
|
working->uid = working->gid = NONE;
|
|
|
|
if (!sscanf(q,"%o",&working->permissions))
|
|
errx(1, "error in config file; bad permissions:\n%s",
|
|
errline);
|
|
|
|
q = parse = missing_field(sob(++parse),errline);
|
|
parse = son(parse);
|
|
if (!*parse)
|
|
errx(1, "malformed line (missing fields):\n%s", errline);
|
|
*parse = '\0';
|
|
if (!sscanf(q,"%d",&working->numlogs))
|
|
errx(1, "error in config file; bad number:\n%s",
|
|
errline);
|
|
|
|
q = parse = missing_field(sob(++parse),errline);
|
|
parse = son(parse);
|
|
if (!*parse)
|
|
errx(1, "malformed line (missing fields):\n%s", errline);
|
|
*parse = '\0';
|
|
if (isdigit(*q))
|
|
working->size = atoi(q);
|
|
else
|
|
working->size = -1;
|
|
|
|
q = parse = missing_field(sob(++parse),errline);
|
|
parse = son(parse);
|
|
eol = !*parse;
|
|
*parse = '\0';
|
|
if (isdigit(*q))
|
|
working->hours = atoi(q);
|
|
else
|
|
working->hours = -1;
|
|
|
|
if (eol)
|
|
q = NULL;
|
|
else {
|
|
q = parse = sob(++parse); /* Optional field */
|
|
parse = son(parse);
|
|
if (!*parse)
|
|
eol = 1;
|
|
*parse = '\0';
|
|
}
|
|
|
|
working->flags = 0;
|
|
while (q && *q && !isspace(*q)) {
|
|
if ((*q == 'Z') || (*q == 'z'))
|
|
working->flags |= CE_COMPACT;
|
|
else if ((*q == 'B') || (*q == 'b'))
|
|
working->flags |= CE_BINARY;
|
|
else if (*q != '-')
|
|
errx(1, "illegal flag in config file -- %c", *q);
|
|
q++;
|
|
}
|
|
|
|
if (eol)
|
|
q = NULL;
|
|
else {
|
|
q = parse = sob(++parse); /* Optional field */
|
|
*(parse = son(parse)) = '\0';
|
|
}
|
|
|
|
working->pid_file = NULL;
|
|
if (q && *q) {
|
|
if (*q == '/')
|
|
working->pid_file = strdup(q);
|
|
else
|
|
errx(1, "illegal pid file in config file:\n%s", q);
|
|
}
|
|
|
|
free(errline);
|
|
}
|
|
if (working)
|
|
working->next = (struct conf_entry *) NULL;
|
|
(void) fclose(f);
|
|
return(first);
|
|
}
|
|
|
|
static char *missing_field(p,errline)
|
|
char *p,*errline;
|
|
{
|
|
if (!p || !*p)
|
|
errx(1, "missing field in config file:\n%s", errline);
|
|
return(p);
|
|
}
|
|
|
|
static void dotrim(log,pid_file,numdays,flags,perm,owner_uid,group_gid)
|
|
char *log;
|
|
char *pid_file;
|
|
int numdays;
|
|
int flags;
|
|
int perm;
|
|
int owner_uid;
|
|
int group_gid;
|
|
{
|
|
char file1 [MAXPATHLEN+1], file2 [MAXPATHLEN+1];
|
|
char zfile1[MAXPATHLEN+1], zfile2[MAXPATHLEN+1];
|
|
int notified, need_notification, fd, _numdays;
|
|
struct stat st;
|
|
pid_t pid;
|
|
|
|
#ifdef _IBMR2
|
|
/* AIX 3.1 has a broken fchown- if the owner_uid is -1, it will actually */
|
|
/* change it to be owned by uid -1, instead of leaving it as is, as it is */
|
|
/* supposed to. */
|
|
if (owner_uid == -1)
|
|
owner_uid = geteuid();
|
|
#endif
|
|
|
|
/* Remove oldest log */
|
|
(void) sprintf(file1,"%s.%d",log,numdays);
|
|
(void) strcpy(zfile1, file1);
|
|
(void) strcat(zfile1, COMPRESS_POSTFIX);
|
|
|
|
if (noaction) {
|
|
printf("rm -f %s\n", file1);
|
|
printf("rm -f %s\n", zfile1);
|
|
} else {
|
|
(void) unlink(file1);
|
|
(void) unlink(zfile1);
|
|
}
|
|
|
|
/* Move down log files */
|
|
_numdays = numdays; /* preserve */
|
|
while (numdays--) {
|
|
(void) strcpy(file2,file1);
|
|
(void) sprintf(file1,"%s.%d",log,numdays);
|
|
(void) strcpy(zfile1, file1);
|
|
(void) strcpy(zfile2, file2);
|
|
if (lstat(file1, &st)) {
|
|
(void) strcat(zfile1, COMPRESS_POSTFIX);
|
|
(void) strcat(zfile2, COMPRESS_POSTFIX);
|
|
if (lstat(zfile1, &st)) continue;
|
|
}
|
|
if (noaction) {
|
|
printf("mv %s %s\n",zfile1,zfile2);
|
|
printf("chmod %o %s\n", perm, zfile2);
|
|
printf("chown %d.%d %s\n",
|
|
owner_uid, group_gid, zfile2);
|
|
} else {
|
|
(void) rename(zfile1, zfile2);
|
|
(void) chmod(zfile2, perm);
|
|
(void) chown(zfile2, owner_uid, group_gid);
|
|
}
|
|
}
|
|
if (!noaction && !(flags & CE_BINARY))
|
|
(void) log_trim(log); /* Report the trimming to the old log */
|
|
|
|
if (!_numdays) {
|
|
if (noaction)
|
|
printf("rm %s\n",log);
|
|
else
|
|
(void)unlink(log);
|
|
}
|
|
else {
|
|
if (noaction)
|
|
printf("mv %s to %s\n",log,file1);
|
|
else
|
|
(void)rename(log, file1);
|
|
}
|
|
|
|
if (noaction)
|
|
printf("Start new log...");
|
|
else {
|
|
fd = creat(log,perm);
|
|
if (fd < 0)
|
|
err(1, "can't start new log");
|
|
if (fchown(fd, owner_uid, group_gid))
|
|
err(1, "can't chmod new log file");
|
|
(void) close(fd);
|
|
if (!(flags & CE_BINARY))
|
|
if (log_trim(log)) /* Add status message */
|
|
err(1, "can't add status message to log");
|
|
}
|
|
if (noaction)
|
|
printf("chmod %o %s...",perm,log);
|
|
else
|
|
(void) chmod(log,perm);
|
|
|
|
pid = 0;
|
|
need_notification = notified = 0;
|
|
if (pid_file != NULL) {
|
|
need_notification = 1;
|
|
pid = get_pid(pid_file);
|
|
} else if (needroot && !(flags & CE_BINARY)) {
|
|
need_notification = 1;
|
|
pid = syslog_pid;
|
|
}
|
|
|
|
if (pid) {
|
|
if (noaction) {
|
|
notified = 1;
|
|
printf("kill -HUP %d\n", (int)pid);
|
|
} else if (kill(pid,SIGHUP))
|
|
warn("can't notify daemon, pid %d", (int)pid);
|
|
else {
|
|
notified = 1;
|
|
if (verbose)
|
|
printf("daemon pid %d notified\n", (int)pid);
|
|
}
|
|
}
|
|
|
|
if ((flags & CE_COMPACT)) {
|
|
if (need_notification && !notified)
|
|
warnx("log not compressed because daemon not notified");
|
|
else if (noaction)
|
|
printf("Compress %s.0\n",log);
|
|
else {
|
|
if (notified) {
|
|
if (verbose)
|
|
printf("small pause to allow daemon to close log\n");
|
|
sleep(10);
|
|
}
|
|
compress_log(log);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Log the fact that the logs were turned over */
|
|
static int log_trim(log)
|
|
char *log;
|
|
{
|
|
FILE *f;
|
|
if ((f = fopen(log,"a")) == NULL)
|
|
return(-1);
|
|
fprintf(f,"%s %s newsyslog[%d]: logfile turned over\n",
|
|
daytime, hostname, (int)getpid());
|
|
if (fclose(f) == EOF)
|
|
err(1, "log_trim: fclose:");
|
|
return(0);
|
|
}
|
|
|
|
/* Fork of /usr/ucb/compress to compress the old log file */
|
|
static void compress_log(log)
|
|
char *log;
|
|
{
|
|
pid_t pid;
|
|
char tmp[MAXPATHLEN+1];
|
|
|
|
(void) sprintf(tmp,"%s.0",log);
|
|
pid = fork();
|
|
if (pid < 0)
|
|
err(1, "fork");
|
|
else if (!pid) {
|
|
(void) execl(COMPRESS_PATH,COMPRESS_PROG,"-f",tmp,0);
|
|
err(1, COMPRESS_PATH);
|
|
}
|
|
}
|
|
|
|
/* Return size in kilobytes of a file */
|
|
static int sizefile(file)
|
|
char *file;
|
|
{
|
|
struct stat sb;
|
|
|
|
if (stat(file,&sb) < 0)
|
|
return(-1);
|
|
return(kbytes(dbtob(sb.st_blocks)));
|
|
}
|
|
|
|
/* Return the age of old log file (file.0) */
|
|
static int age_old_log(file)
|
|
char *file;
|
|
{
|
|
struct stat sb;
|
|
char tmp[MAXPATHLEN+sizeof(".0")+sizeof(COMPRESS_POSTFIX)+1];
|
|
|
|
(void) strcpy(tmp,file);
|
|
if (stat(strcat(tmp,".0"),&sb) < 0)
|
|
if (stat(strcat(tmp,COMPRESS_POSTFIX), &sb) < 0)
|
|
return(-1);
|
|
return( (int) (timenow - sb.st_mtime + 1800) / 3600);
|
|
}
|
|
|
|
static pid_t get_pid(pid_file)
|
|
char *pid_file;
|
|
{
|
|
FILE *f;
|
|
char line[BUFSIZ];
|
|
pid_t pid = 0;
|
|
|
|
if ((f = fopen(pid_file,"r")) == NULL)
|
|
warn("can't open %s pid file to restart a daemon",
|
|
pid_file);
|
|
else {
|
|
if (fgets(line,BUFSIZ,f)) {
|
|
pid = atol(line);
|
|
if (pid < MIN_PID || pid > MAX_PID) {
|
|
warnx("preposterous process number: %d", (int)pid);
|
|
pid = 0;
|
|
}
|
|
} else
|
|
warn("can't read %s pid file to restart a daemon",
|
|
pid_file);
|
|
(void)fclose(f);
|
|
}
|
|
return pid;
|
|
}
|
|
|
|
#ifndef OSF
|
|
/* Duplicate a string using malloc */
|
|
|
|
char *strdup(strp)
|
|
register char *strp;
|
|
{
|
|
register char *cp;
|
|
|
|
if ((cp = malloc((unsigned) strlen(strp) + 1)) == NULL)
|
|
abort();
|
|
return(strcpy (cp, strp));
|
|
}
|
|
#endif
|
|
|
|
/* Skip Over Blanks */
|
|
char *sob(p)
|
|
register char *p;
|
|
{
|
|
while (p && *p && isspace(*p))
|
|
p++;
|
|
return(p);
|
|
}
|
|
|
|
/* Skip Over Non-Blanks */
|
|
char *son(p)
|
|
register char *p;
|
|
{
|
|
while (p && *p && !isspace(*p))
|
|
p++;
|
|
return(p);
|
|
}
|