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Add a -C (create) option for newsyslog, and a 'C' flag for entries in the

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config file.  If the -C option is specified once, then newsyslog will create
any entries which specify the 'C' option.  If -C is given twice, then
newsyslog will create all missing log files.  Some of this code comes
from NetBSD, although this implementation does not exactly match theirs.

Reviewed by:	freebsd-arch
MFC after:	10 days
This commit is contained in:
Garance A Drosehn 2003-04-27 23:37:31 +00:00
parent 74a0458023
commit 28045703cc
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=114137
2 changed files with 190 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
usr.sbin/newsyslog/newsyslog.8
View File

@ -17,7 +17,7 @@
.\" the suitability of this software for any purpose. It is
.\" provided "as is" without express or implied warranty.
.\"
.Dd March 08, 2003
.Dd April 27, 2003
.Dt NEWSYSLOG 8
.Os
.Sh NAME
@ -25,7 +25,7 @@
.Nd maintain system log files to manageable sizes
.Sh SYNOPSIS
.Nm
.Op Fl Fnrsv
.Op Fl CFnrsv
.Op Fl R Ar tagname
.Op Fl a Ar directory
.Op Fl f Ar config_file
@ -293,6 +293,11 @@ If
.Sy B
is specified, then that informational message will not be
inserted into the log file.
.It Sy C
indicates that the log file should be created if it does not
already exist, and if the
.Fl C
option was also specified on the command line.
.It Sy G
indicates that the specified
.Ar logfile_name
@ -429,6 +434,20 @@ However, this option is most likely to be useful when specified
with the
.Fl R
option, and in that case the compression will be done.
.It Fl C
If specified once, then
.Nm
will create any log files which do not exist, and which have the
.Sy C
flag specified in their config file entry.
If specified multiple times, then
.Nm
will create all log files which do not already exist.
If log files are given on the command-line, then the
.Fl C
or
.Fl CC
will only apply to those specific log files.
.It Fl F
Force
.Nm

187
usr.sbin/newsyslog/newsyslog.c
View File

@ -73,6 +73,7 @@ static const char rcsid[] =
#define CE_GLOB 0x0040 /* name of the log is file name pattern. */
#define CE_SIGNALGROUP 0x0080 /* Signal a process-group instead of a single */
/* process when trimming this file. */
#define CE_CREATE 0x0100 /* Create the log file if it does not exist. */
#define MIN_PID 5 /* Don't touch pids lower than this */
#define MAX_PID 99999 /* was lower, see /usr/include/sys/proc.h */
@ -83,6 +84,7 @@ struct conf_entry {
char *log; /* Name of the log */
char *pid_file; /* PID file */
char *r_reason; /* The reason this file is being rotated */
int firstcreate; /* Creating log for the first time (-C). */
int rotate; /* Non-zero if this file should be rotated */
uid_t uid; /* Owner of log */
gid_t gid; /* Group of log */
@ -100,6 +102,9 @@ struct conf_entry {
#define DEFAULT_MARKER "<default>"
int archtodir = 0; /* Archive old logfiles to other directory */
int createlogs; /* Create (non-GLOB) logfiles which do not */
/* already exist. 1=='for entries with */
/* C flag', 2=='for all entries'. */
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 */
@ -143,7 +148,8 @@ static int send_signal(const struct conf_entry *ent);
static time_t parse8601(char *s, char *errline);
static void movefile(char *from, char *to, int perm, uid_t owner_uid,
gid_t group_gid);
static void createdir(char *dirpart);
static void createdir(const struct conf_entry *ent, char *dirpart);
static void createlog(const struct conf_entry *ent);
static time_t parseDWM(char *s, char *errline);
/*
@ -200,6 +206,7 @@ init_entry(const char *fname, struct conf_entry *src_entry)
if (src_entry->pid_file)
tempwork->pid_file = strdup(src_entry->pid_file);
tempwork->r_reason = NULL;
tempwork->firstcreate = 0;
tempwork->rotate = 0;
tempwork->uid = src_entry->uid;
tempwork->gid = src_entry->gid;
@ -215,6 +222,7 @@ init_entry(const char *fname, struct conf_entry *src_entry)
/* Initialize as a "do-nothing" entry */
tempwork->pid_file = NULL;
tempwork->r_reason = NULL;
tempwork->firstcreate = 0;
tempwork->rotate = 0;
tempwork->uid = (uid_t)-1;
tempwork->gid = (gid_t)-1;
@ -295,9 +303,31 @@ do_entry(struct conf_entry * ent)
size = sizefile(ent->log);
modtime = age_old_log(ent->log);
ent->rotate = 0;
ent->firstcreate = 0;
if (size < 0) {
if (verbose)
printf("does not exist.\n");
/*
* If either the C flag or the -C option was specified,
* and if we won't be creating the file, then have the
* verbose message include a hint as to why the file
* will not be created.
*/
temp_reason[0] = '\0';
if (createlogs > 1)
ent->firstcreate = 1;
else if ((ent->flags & CE_CREATE) && createlogs)
ent->firstcreate = 1;
else if (ent->flags & CE_CREATE)
strncpy(temp_reason, " (no -C option)", REASON_MAX);
else if (createlogs)
strncpy(temp_reason, " (no C flag)", REASON_MAX);
if (ent->firstcreate) {
if (verbose)
printf("does not exist -> will create.\n");
createlog(ent);
} else if (verbose) {
printf("does not exist, skipped%s.\n", temp_reason);
}
} else {
if (ent->flags & CE_TRIMAT && !force && !rotatereq) {
if (timenow < ent->trim_at
@ -479,7 +509,7 @@ parse_args(int argc, char **argv)
*p = '\0';
/* Parse command line options. */
while ((ch = getopt(argc, argv, "a:f:nrsvFR:")) != -1)
while ((ch = getopt(argc, argv, "a:f:nrsvCFR:")) != -1)
switch (ch) {
case 'a':
archtodir++;
@ -500,6 +530,10 @@ parse_args(int argc, char **argv)
case 'v':
verbose++;
break;
case 'C':
/* Useful for things like rc.diskless... */
createlogs++;
break;
case 'F':
force++;
break;
@ -532,7 +566,7 @@ usage(void)
{
fprintf(stderr,
"usage: newsyslog [-Fnrsv] [-a directory] [-f config-file]\n"
"usage: newsyslog [-CFnrsv] [-a directory] [-f config-file]\n"
" [ [-R requestor] filename ... ]\n");
exit(1);
}
@ -972,16 +1006,23 @@ parse_file(FILE *cf, const char *cfname, struct conf_entry **work_p,
case 'b':
working->flags |= CE_BINARY;
break;
case 'c': /* Used by NetBSD for "CE_CREATE" */
case 'c':
/*
* netbsd uses 'c' for "create". We will
* temporarily accept it for 'g', because
* earlier freebsd versions had a typo
* of ('G' || 'c')...
* XXX - Ick! Ugly! Remove ASAP!
* We want `c' and `C' for "create". But we
* will temporarily treat `c' as `g', because
* FreeBSD releases <= 4.8 have a typo of
* checking ('G' || 'c') for CE_GLOB.
*/
warnx("Assuming 'g' for 'c' in flags for line:\n%s",
errline);
/* FALLTHROUGH */
if (*q == 'c') {
warnx("Assuming 'g' for 'c' in flags for line:\n%s",
errline);
warnx("The 'c' flag will eventually mean 'CREATE'");
working->flags |= CE_GLOB;
break;
}
working->flags |= CE_CREATE;
break;
case 'g':
working->flags |= CE_GLOB;
break;
@ -1151,7 +1192,7 @@ dotrim(const struct conf_entry *ent, char *log, int numdays, int flags)
/* check if archive directory exists, if not, create it */
if (lstat(dirpart, &st))
createdir(dirpart);
createdir(ent, dirpart);
/* get filename part of logfile */
if ((p = rindex(log, '/')) == NULL)
@ -1254,6 +1295,8 @@ dotrim(const struct conf_entry *ent, char *log, int numdays, int flags)
}
/* Now move the new log file into place */
/* XXX - We should replace the above 'rename' with 'link(log, file1)'
* then replace the following with 'createfile(ent)' */
strlcpy(tfile, log, sizeof(tfile));
strlcat(tfile, ".XXXXXX", sizeof(tfile));
if (noaction) {
@ -1353,7 +1396,10 @@ log_trim(const char *log, const struct conf_entry *log_ent)
xtra = "";
if (log_ent->def_cfg)
xtra = " using <default> rule";
if (log_ent->r_reason != NULL)
if (log_ent->firstcreate)
fprintf(f, "%s %s newsyslog[%d]: logfile first created%s\n",
daytime, hostname, (int) getpid(), xtra);
else if (log_ent->r_reason != NULL)
fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s%s\n",
daytime, hostname, (int) getpid(), log_ent->r_reason, xtra);
else
@ -1591,7 +1637,7 @@ movefile(char *from, char *to, int perm, uid_t owner_uid, gid_t group_gid)
/* create one or more directory components of a path */
static void
createdir(char *dirpart)
createdir(const struct conf_entry *ent, char *dirpart)
{
int res;
char *s, *d;
@ -1620,8 +1666,113 @@ createdir(char *dirpart)
if (*s == '\0')
break;
}
if (verbose)
printf("created directory '%s' for -a\n", dirpart);
if (verbose) {
if (ent->firstcreate)
printf("Created directory '%s' for new %s\n",
dirpart, ent->log);
else
printf("Created directory '%s' for -a\n", dirpart);
}
}
/*
* Create a new log file, destroying any currently-existing version
* of the log file in the process. If the caller wants a backup copy
* of the file to exist, they should call 'link(logfile,logbackup)'
* before calling this routine.
*/
void
createlog(const struct conf_entry *ent)
{
int fd, failed;
struct stat st;
char *realfile, *slash, tempfile[MAXPATHLEN];
fd = -1;
realfile = ent->log;
/*
* If this log file is being created for the first time (-C option),
* then it may also be true that the parent directory does not exist
* yet. Check, and create that directory if it is missing.
*/
if (ent->firstcreate) {
strlcpy(tempfile, realfile, sizeof(tempfile));
slash = strrchr(tempfile, '/');
if (slash != NULL) {
*slash = '\0';
failed = lstat(tempfile, &st);
if (failed && errno != ENOENT)
err(1, "Error on lstat(%s)", tempfile);
if (failed)
createdir(ent, tempfile);
else if (!S_ISDIR(st.st_mode))
errx(1, "%s exists but is not a directory",
tempfile);
}
}
/*
* First create an unused filename, so it can be chown'ed and
* chmod'ed before it is moved into the real location. mkstemp
* will create the file mode=600 & owned by us. Note that all
* temp files will have a suffix of '.z<something>'.
*/
strlcpy(tempfile, realfile, sizeof(tempfile));
strlcat(tempfile, ".zXXXXXX", sizeof(tempfile));
if (noaction)
printf("\tmktemp %s\n", tempfile);
else {
fd = mkstemp(tempfile);
if (fd < 0)
err(1, "can't mkstemp logfile %s", tempfile);
/*
* Add status message to what will become the new log file.
*/
if (!(ent->flags & CE_BINARY)) {
if (log_trim(tempfile, ent))
err(1, "can't add status message to log");
}
}
/* Change the owner/group, if we are supposed to */
if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
if (noaction)
printf("\tchown %u:%u %s\n", ent->uid, ent->gid,
tempfile);
else {
failed = fchown(fd, ent->uid, ent->gid);
if (failed)
err(1, "can't fchown temp file %s", tempfile);
(void) close(fd);
}
}
/*
* Note that if the real logfile still exists, and if the call
* to rename() fails, then "neither the old file nor the new
* file shall be changed or created" (to quote the standard).
* If the call succeeds, then the file will be replaced without
* any window where some other process might find that the file
* did not exist.
* XXX - ? It may be that for some error conditions, we could
* retry by first removing the realfile and then renaming.
*/
if (noaction) {
printf("\tchmod %o %s\n", ent->permissions, tempfile);
printf("\tmv %s %s\n", tempfile, realfile);
} else {
failed = fchmod(fd, ent->permissions);
if (failed)
err(1, "can't fchmod temp file '%s'", tempfile);
failed = rename(tempfile, realfile);
if (failed)
err(1, "can't mv %s to %s", tempfile, realfile);
}
if (fd >= 0)
close(fd);
}
/*-