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newsyslog.c
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newsyslog.c
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/*
* newsyslog - roll over selected logs at the appropriate time,
* keeping the a specified number of backup files around.
*/
/*
* This file contains changes from Greg A. Woods; Planix, Inc.
*
* Copyright for these changes is hereby assigned to MIT under the copyright
* license given below.
*/
/*
* This file contains changes from the Open Software Foundation.
*
* Presumably their changes were assigned implicitly to MIT too.
*/
/*
* This file contains changes from FreeBSD.
*
* Presumably their changes were assigned implicitly to MIT too.
*/
/*
*
* 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.
*
*/
#include <sys/cdefs.h>
#ifndef lint
static const char orig_rcsid[] =
"FreeBSD: newsyslog.c,v 1.14 1997/10/06 07:46:08 charnier Exp";
static const char rcsid[] =
"@(#)newsyslog:newsyslog.c:$Format:%D:%ci:%cN:%h$";
#endif /* not lint */
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef STDC_HEADERS
# include <stdlib.h>
# include <stddef.h>
#else
# ifdef HAVE_STDLIB_H
# include <stdlib.h>
# endif
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#ifdef HAVE_SYS_WAIT_H
# include <sys/wait.h>
#endif
#include <ctype.h>
#include <fcntl.h>
#if defined(HAVE_FLOCK) && defined(HAVE_SYS_FILE_H) && !defined(LOCK_EX)
# include <sys/file.h> /* LOCK_* usually in <fcntl.h> */
#endif
#include <grp.h>
#include <pwd.h>
#include <signal.h>
#include <stdio.h>
#include <assert.h>
#include <limits.h>
#ifdef HAVE_NETDB_H
# include <netdb.h> /* for MAXHOSTNAMELEN */
#endif
#if !defined(PID_MAX) && defined(HAVE_SYS_PROC_H)
# if defined(HAVE_SYS_USER_H)
# include <sys/user.h>
# endif
# include <sys/proc.h>
#endif
#ifdef TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
#endif
#ifdef HAVE_STRING_H
# if !defined(STDC_HEADERS) && defined(HAVE_MEMORY_H)
# include <memory.h>
# endif
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_ERRNO_H
# include <errno.h>
#else
# ifndef errno
extern int errno;
# endif /* !errno */
#endif /* HAVE_ERRNO_H */
#ifdef HAVE_PATHS_H
# include <paths.h>
#endif
#ifdef HAVE_PATHNAMES_H
# include "pathnames.h" /* a "local" file in *BSD */
#endif
#ifdef HAVE_LINUX_THREADS_H
# include <linux/threads.h> /* PID_MAX? */
#endif
#ifdef HAVE_LINUX_TASKS_H
# include <linux/tasks.h> /* PID_MAX? */
#endif
#include "newsyslog.h" /* portability defines */
#ifndef PATH_COMPRESS
# if defined(_PATH_COMPRESS)
# define PATH_COMPRESS _PATH_COMPRESS
# define COMPRESS_SUFFIX ".Z"
# elif defined(_PATH_GZIP)
# define PATH_COMPRESS _PATH_GZIP
# define COMPRESS_SUFFIX ".gz"
# endif
#endif
#ifndef PATH_CONFIG
# ifdef _PATH_NEWSYSLOGCONF
# define PATH_CONFIG _PATH_NEWSYSLOGCONF
# endif
#endif
#ifndef PATH_SYSLOGD_PIDFILE
# ifdef _PATH_SYSLOGDPID
# define PATH_SYSLOGD_PIDFILE _PATH_SYSLOGDPID
# endif
#endif
#ifndef MAX_FORK_RETRIES
# define MAX_FORK_RETRIES 5 /* a reasonable effort.... */
#endif
#define CE_COMPACT (1<<0) /* Compact the achived log files */
#define CE_BINARY (1<<1) /* Logfile is binary, don't add status mesg */
#define CE_PLAIN0 (1<<2) /* Keep .0 file uncompressed */
#define CE_NOSIGNAL (1<<3) /* Don't send a signal when file is trimmed */
#define CE_NOCREATE (1<<4) /* Don't create the new log file */
#define CE_TRIMAT (1<<5) /* we have a valid trim time specification */
#define CE_SUBDIR (1<<6) /* move archived logs in "${logfile}.d" */
#define NO_ID ((uid_t) -1) /* no UID/GID specified -- preserve */
struct conf_entry {
char *log; /* Name of the log */
char *pid_file; /* PID file */
char *user; /* Owner name of log */
uid_t uid; /* Owner ID of log */
char *group; /* Group name of log */
uid_t gid; /* Group ID of log */
unsigned int numlogs; /* Number of logs to keep */
unsigned long size; /* maximum log size in KB */
int hours; /* maximum hours between log trimming */
time_t trim_at; /* time to trim log at */
unsigned int permissions; /* File permissions on the log */
unsigned int flags; /* Flags (CE_*) */
int signum; /* Signal to send to daemon (SIG*) */
struct conf_entry *next; /* Linked list pointer */
};
const char *argv0 = PACKAGE_NAME;
const char package[] = PACKAGE_NAME; /* the package name */
const char tarname[] = PACKAGE; /* the original dist name (not PACKAGE_TARNAME, not yet) */
const char version[] = VERSION; /* the package version (not PACKAGE_VERSION, not yet) */
const char bugreport[] = PACKAGE_BUGREPORT;
int verbose = FALSE;/* Print out what's going on */
int quiet = FALSE; /* Don't print certain useless errors (use with '-F') */
int write_metalog = FALSE;/* Magic for NetBSD unprivileged builds (use with '-F') */
int needroot = TRUE;/* Root privs are necessary for default conf */
int show_script = FALSE;/* Show sh-script on stdout instead of doing the job */
int debug = FALSE; /* Don't do anything, don't show script (use with -v) */
int domidnight = -1;/* ignore(-1) do(1) don't(0) do midnight run */
int run_interval = -1;/* interval in minutes at which we are run by cron */
int create_only = FALSE; /* make sure all files exist */
int force = FALSE; /* force all files to be trimmed */
int send_signals = TRUE; /* normally we send signals as configured */
const char *config_file = PATH_CONFIG;/* Configuration file to use */
const char *syslogd_pidfile = PATH_SYSLOGD_PIDFILE;/* syslogd's pid file */
time_t timenow;
pid_t syslogd_pid; /* read in from /etc/syslog.pid */
char hostname[MAXHOSTNAMELEN + 1]; /* hostname */
char *localdomain = NULL; /* not currently used.... */
char *my_uname;
char *my_gname;
char *daytime; /* timenow in human readable form */
int main __P((int, char **)); /* XXX HACK for WARNS=1 */
static struct conf_entry *parse_file __P((char **));
static char *strsob __P((char *));
static char *strson __P((char *));
static char *missing_field __P((char *, int, char *));
static void do_entry __P((struct conf_entry *));
static void parse_options __P((int, char **));
static void usage __P((void));
static void help __P((void));
static void do_trim __P((struct conf_entry *));
static int note_trim __P((char *));
static void compress_log __P((char *));
static off_t check_file_size __P((char *));
static int check_old_log_age __P((struct conf_entry *));
static time_t read_first_timestamp __P((char *));
static time_t parse_tmstamp __P((char *, char *));
static pid_t get_pid_file __P((const char *));
static int getsig __P((char *));
static int parse_dwm __P((char *, time_t *));
#if ! HAVE_DECL_OPTERR
extern int opterr;
#endif
#if ! HAVE_DECL_OPTIND
extern int optind;
#endif
#if ! HAVE_DECL_OPTOPT
extern int optopt;
#endif
#if ! HAVE_DECL_OPTARG
extern char *optarg;
#endif
#if ! HAVE_DECL_EXIT
extern void exit __P((int));
#endif
#if ! HAVE_DECL_GETOPT
extern int getopt __P((int, char * const [], const char *));
#endif
#if ! HAVE_DECL_SETGROUPENT
extern int setgroupent __P((int));
#endif
#if ! HAVE_DECL_SETPASSENT
extern int setpassent __P((int));
#endif
#if ! HAVE_DECL_SIG2STR
extern int sig2str __P((int, char *));
#endif
#if ! HAVE_DECL_STR2SIG
extern int str2sig __P((const char *, int *));
#endif
#if ! HAVE_DECL_STRCHR
extern char *strchr __P((const char *, int));
#endif
#if ! HAVE_DECL_STRDUP
extern char *strdup __P((const char *));
#endif
#if ! HAVE_DECL_STRPTIME /* STUPID GNU/Linux/glibc */
extern char *strptime __P((const char *, const char *, struct tm *));
#endif
#if ! HAVE_DECL_STRRCHR
extern char *strrchr __P((const char *, int));
#endif
#if ! HAVE_DECL_STRTOK
extern char *strtok __P((char *, const char *));
#endif
#if ! HAVE_DECL_STRTOL
extern long *strtol __P((const char *, char **, int));
#endif
#if ! HAVE_DECL_STRTOL
extern unsigned long *strtoul __P((const char *, char **, int));
#endif
static int exitstatus = 0;
int
main(argc, argv)
int argc;
char *argv[];
{
char *s;
int cstatus;
int cpid;
struct conf_entry *p, *q;
struct passwd *pass;
struct group *grp;
timenow = time((time_t *) 0);
/* Let's get our hostname */
(void) gethostname(hostname, sizeof(hostname));
/* and truncate any domain part off */
if ((s = strchr(hostname, '.'))) {
*s++ = '\0';
localdomain = strdup(s);
} else {
localdomain = strdup("");
}
parse_options(argc, argv);
/* timenow may have been changed in parse_options() by -T */
daytime = ctime(&timenow) + 4; /* trim the day name off */
daytime[15] = '\0'; /* trim the year off too */
if (needroot && getuid()) { /* using geteuid() would allow making program setuid */
fprintf(stderr, "%s: you do not have root privileges\n", argv0);
exit(1);
}
if (setgroupent(1) != 1) {
fprintf(stderr,
"%s: warning: setgroupent(1) failed: %s\n",
argv0,
strerror(errno));
endgrent(); /* ??? */
}
if (setpassent(1) != 1) {
fprintf(stderr,
"%s: warning: setpassent(1) failed: %s\n",
argv0,
strerror(errno));
endpwent(); /* ??? */
}
if ((pass = getpwuid(geteuid())) == NULL) {
fprintf(stderr, "%s: you do not have a valid user name!\n", argv0);
exit(1);
}
my_uname = strdup(pass->pw_name);
if ((grp = getgrgid(getegid())) == NULL) {
fprintf(stderr, "%s: you do not have a valid group name\n", argv0);
exit(1);
}
my_gname = strdup(grp->gr_name);
p = q = parse_file(argv + optind);
syslogd_pid = get_pid_file(syslogd_pidfile);
while (p) {
do_entry(p);
p = p->next;
if (q->log)
free(q->log);
if (q->pid_file)
free(q->pid_file);
free((void *) q);
q = p;
}
/* Wait for any children (log compressors) to finish.... */
errno = 0;
while (((cpid = wait(&cstatus)) != -1) || errno == EINTR) {
if (cstatus == -1) {
fprintf(stderr, "%s: failed to reap child process %d: %s.",
argv0, cpid, strerror(errno));
} else if (WIFEXITED(cstatus)) {
if (verbose || (WEXITSTATUS(cstatus) != 0)) {
fprintf(verbose ? stdout : stderr,
"%s: child process[%d] exited status %d\n",
argv0, cpid, WEXITSTATUS(cstatus));
}
} else if (WIFSIGNALED(cstatus)) {
char signm[SIG2STR_MAX];
if (sig2str(WTERMSIG(cstatus), signm) == -1) {
sprintf(signm, "#%d", WTERMSIG(cstatus));
}
fprintf(stderr, "%s: child process[%d] killed by signal SIG%s %s: %s\n",
argv0, cpid, signm,
WCOREDUMP(cstatus) ? "and dumped core" : "(no core)",
strsignal(WTERMSIG(cstatus)));
} else if (WIFSTOPPED(cstatus)) {
char signm[SIG2STR_MAX];
if (sig2str(WSTOPSIG(cstatus), signm) == -1) {
sprintf(signm, "#%d", WSTOPSIG(cstatus));
}
fprintf(stderr, "%s: child process[%d] stopped with signal SIG%s (%s), continuing...\n",
argv0, cpid, signm, strsignal(WSTOPSIG(cstatus)));
kill(cpid, SIGCONT);
} else {
fprintf(stderr, "%s: child process[%d] died with bad status \\0%03o\n",
argv0, cpid, cstatus);
}
errno = 0;
}
if (errno != ECHILD) {
fprintf(stderr, "%s: wait() failed: %s\n", argv0, strerror(errno));
exit(1);
}
free(localdomain);
exit(exitstatus);
/* NOTREACHED */
}
static void
do_entry(ent)
struct conf_entry *ent;
{
int we_trim_it = FALSE;
off_t size; /* in kbytes */
int modtime = 0; /* in hours */
assert(domidnight == -1 || domidnight == 1 || domidnight == 0);
if (verbose) {
printf("## %s [%s(%lu):%s(%lu)] 0%03o <#%u,%s%s%s%s%s>: ",
ent->log,
ent->user ? ent->user : "",
(unsigned long) (ent->uid == NO_ID) ? (write_metalog ? 0 : geteuid()) : ent->uid,
ent->group ? ent->group : "",
(unsigned long) (ent->gid == NO_ID) ? (write_metalog ? 0 : getegid()) : ent->gid,
ent->permissions,
ent->numlogs,
(ent->flags & CE_SUBDIR) ? "subdir," : "",
(ent->flags & CE_NOCREATE) ? "nocreate," : "",
(ent->flags & CE_COMPACT) ? "compact," : "",
(ent->flags & CE_BINARY) ? "binary," : "",
(ent->flags & CE_NOSIGNAL) ? "nosig," : "",
(ent->flags & CE_PLAIN0) ? "plain.0" : "");
if (ent->flags & CE_TRIMAT) {
struct tm tms;
char trimtime[20];
tms = *localtime(&(ent->trim_at));
strftime(trimtime, sizeof(trimtime), "%Y/%m/%d-%T", &tms);
printf("(T:%s) ", trimtime);
}
}
size = check_file_size(ent->log);
if (size < 0) {
if (verbose)
printf("does not exist ");
if (!(ent->flags & CE_NOCREATE)) {
if (verbose)
printf("(will create) ");
we_trim_it = TRUE;
}
} else if (size == 0 && verbose)
printf("is empty ");
if (size > 0) { /* ignore empty/missing ones */
if (verbose && (ent->size > 0))
printf("size (Kb): %ld [allow %ld] ", (long) size, ent->size);
if ((ent->size > 0) && (size >= ent->size))
we_trim_it = TRUE;
if (ent->hours > 0) {
modtime = check_old_log_age(ent);
if (verbose)
printf("age (hr): %d [allow %d] ", modtime, ent->hours);
/* always trim if timestamp FUBAR */
if (modtime >= ent->hours || modtime < 0)
we_trim_it = TRUE;
}
if (ent->flags & CE_TRIMAT && domidnight == -1) {
/*
* if there was no interval, but just a trim time spec
* then check to see if it's time to trim it now...
*/
if ((timenow >= ent->trim_at) &&
(difftime(timenow, ent->trim_at) < 60 * run_interval)) {
if (verbose)
printf("(time to trim) ");
we_trim_it = TRUE;
} else if (!we_trim_it) { /* don't not trim if we should! */
if (verbose)
printf("(but not time to trim) ");
we_trim_it = FALSE;
}
}
}
if (domidnight == -1 ) {
if (verbose && !(ent->flags & CE_TRIMAT))
printf("(no -m|-M|trimtime) ");
} else if (domidnight == 1 && (ent->hours % 24) == 0) {
/*
* we've already set we_trim_it above if the file is as old or
* older than ent->hours
*/
if (verbose && we_trim_it)
printf("(daily with -m) ");
} else if (domidnight == 0 && (ent->hours % 24) == 0) {
if (verbose && !force)
printf("(not the daily trim, -M set) ");
we_trim_it = FALSE;
}
if ((force || create_only) && !we_trim_it) {
if (verbose)
printf("(forced )");
we_trim_it = TRUE;
}
if (we_trim_it) {
if (verbose)
puts(": creating and/or trimming log...");
do_trim(ent);
} else {
if (verbose)
putchar('\n');
}
return;
}
static void
parse_options(argc, argv)
int argc;
char **argv;
{
int ch;
long ltmp;
char *p;
struct tm tms;
int tms_hour;
int tms_min;
#ifdef notyet
/* #ifdef HAVE_GETPROGNAME */
argv0 = getprogname();
/* #else */
#endif
argv0 = (argv0 = strrchr(argv[0], '/')) ? argv0 + 1 : argv[0];
optind = 1; /* Start options parsing */
opterr = 0;
while ((ch = getopt(argc, argv, ":CFMT:UVdf:hi:mnp:qrst:v")) != -1) {
switch (ch) {
case 'C':
create_only = TRUE;
break;
case 'F':
force = TRUE;
break;
case 'M': /* NOT the midnight run */
domidnight = 0;
break;
case 'T': /* reset current time, mostly for testing */
/* assert(optarg != NULL); */
p = strptime(optarg, "%H:%M", &tms);
tms_hour = tms.tm_hour;
tms_min = tms.tm_min;
tms = *localtime(&timenow);
tms.tm_hour = tms_hour;
tms.tm_min = tms_min;
if (!p || (p && *p)) { /* should point to '\0' */
fprintf(stderr,
"%s: time of '%s' is not parsable (use HH:MM)\n",
argv0,
optarg);
exit(2);
}
/*
* XXX mktime() has a broken API....
*/
if ((timenow = mktime(&tms)) == (time_t) -1) {
fprintf(stderr,
"%s: time of '%s' cannot be converted\n",
argv0,
optarg);
exit(2);
}
if (timenow < time((time_t *) NULL))
timenow += 24*60*60; /* go to tomorrow */
if (verbose)
printf("%s: have adjusted timenow to: %s", argv0, ctime(&timenow));
break;
case 'U':
write_metalog = TRUE;
needroot = FALSE; /* don't need root */
break;
case 'V':
printf("%s: version %s-%s.\n", argv0, package, version);
exit(0);
/* NOTREACHED */
case 'd':
debug++;
needroot = FALSE; /* don't need root */
break;
case 'f':
/* assert(optarg != NULL); */
config_file = optarg;
break;
case 'h':
help();
/* NOTREACHED */
case 'i': /* run interval in minutes */
/* assert(optarg != NULL); */
if (optarg[0] == '\0') {
fprintf(stderr,
"%s: an empty run interval value is not permitted\n",
argv0);
usage();
/* NOTREACHED */
}
errno = 0;
ltmp = strtol(optarg, &p, 0);
if (p == optarg) {
fprintf(stderr,
"%s: run interval of '%s' is not a valid number\n",
argv0,
optarg);
exit(2);
}
if (*p) {
fprintf(stderr,
"%s: run interval of '%s' has unsupported trailing unit specification characters\n",
argv0,
optarg);
exit(2);
}
if (errno != 0) {
fprintf(stderr,
"%s: run interval of '%s' is not convertible: %s\n",
argv0,
optarg,
strerror(errno));
exit(2);
}
if (ltmp > INT_MAX) {
fprintf(stderr,
"%s: run interval of %ld is too large\n",
argv0,
ltmp);
exit(2);
}
if (ltmp < 1) {
fprintf(stderr,
"%s: run interval of %ld is too small\n",
argv0,
ltmp);
exit(2);
}
run_interval = (int) ltmp;
break;
case 'm':
domidnight = 1; /* the midnight run */
break;
case 'n':
show_script = TRUE;
needroot = FALSE; /* don't need root */
break;
case 'p':
/* assert(optarg != NULL); */
syslogd_pidfile = optarg;
break;
case 'q':
quiet++;
break;
case 'r':
needroot = FALSE;
break;
case 's':
send_signals = FALSE;
break;
case 'v':
verbose++;
break;
case '?':
fprintf(stderr, "%s: invalid option: '-%c'\n", argv0, optopt);
usage();
/* NOTREACHED */
/*
* "If optstring has a leading ':' then a missing option
* argument causes ':' to be returned instead of '?'." ... "in
* addition to suppressing any error messages" ... "the variable
* optopt is set to the character that caused the error."
*/
case ':':
fprintf(stderr, "%s: missing parameter for -%c\n", argv0, optopt);
usage();
/* NOTREACHED */
default:
fprintf(stderr, "%s: internal error: -%c not handled\n", argv0, ch);
abort();
/* NOTREACHED */
}
}
return;
}
#define USAGE_FMT "Usage: %s [-V] [-T hh:mm] [-M|-m|-i interval] [-Fdnrsv] [-f config-file] [-p syslogd-pidfile] [file ...]\n"
static void
usage()
{
fprintf(stderr, USAGE_FMT, argv0);
exit(2);
/* NOTREACHED */
}
static void
help()
{
printf(USAGE_FMT, argv0);
printf("\n");
printf("%s, distributed as %s-%s. Usage details:\n", package, tarname, version);
printf("\n");
printf(" -F force immediate trimming\n");
printf(" -M select normal periodic processing [opposite of -m]\n");
printf(" -T hh:mm adjust current time\n");
printf(" -U magic 'unprivileged' feature for use in NetBSD builds\n");
printf(" -V display version and exit\n");
printf(" -d don't do anything, just debug (repeat for in-depth)\n");
printf(" -f config_fn configuration file [default: %s]\n", config_file);
printf(" -h print this help and exit\n");
printf(" -i minutes specify how often %s is invoked\n", argv0);
printf(" -m select 'midnight' processing [opposite of -M]\n");
printf(" -n show sh-script on stdout instead of doing work\n");
printf(" -p syslogd-pid syslogd PID file [default: %s]\n", syslogd_pidfile);
printf(" -r remove restriction to superuser\n");
printf(" -s do not signal daemon processes\n");
printf(" -v show verbose explanitory messages\n");
printf("\n");
printf(" file only trim specified file(s)\n");
printf("\n");
printf("Original Copyright (c) 1987, Massachusetts Institute of Technology\n");
printf("Package Copyright (c) Planix, Inc.\n");
printf("See 'COPYING' file in the source distribution for details.\n");
printf("Please send bug reports to <%s>\n", bugreport);
exit(0);
/* NOTREACHED */
}
/* Parse a configuration file and return a linked list of all the logs
* to process, possibly restricted to just the specified files.
*/
static struct conf_entry *
parse_file(files)
char **files; /* pointer into argv[] at first non-option */
{
FILE *fp = NULL;
char line[BUFSIZ];
char *parse;
char *q;
char *errline;
char *group;
struct conf_entry *first = NULL;
struct conf_entry *working = NULL;
struct passwd *pass;
struct group *grp;
int eol = FALSE;
int lnum = 0;
char prev = '\0';
/*
* NOTE: we don't ever close the config file until exit() does it for
* us. If we're reading stdin then we don't need to close it, and if
* we're reading any other file we need to hold the lock until we're
* done to prevent collisions with new instances.
*/
if (strcmp(config_file, "-") == 0) {
fp = stdin;
config_file = "STDIN";
} else {
int fd;
#ifdef HAVE_FLOCK
/*
* flock(2) is preferred because it works with vi
*/
if ((fd = open(config_file, O_RDONLY, (mode_t) 0)) != -1) {
if (flock(fd, LOCK_EX | LOCK_NB) != -1)
fp = fdopen(fd, "r");
}
#else
/*
* fcntl locking is almost standard so assume it is
* there if flock() is not available.
*/
/*
* NOTE: because we want an exclusive lock, we have to ask for
* a "write" lock, and on some systems (e.g. some/all 4.4BSD
* and derivatives) this means we need to open the file for
* read and write. This is really stupid, but that's the way
* of POSIX! :-/
*/
if ((fd = open(config_file, O_RDWR, (mode_t) 0)) != -1) {
struct flock lock;
lock.l_type = F_WRLCK; /* exclusive */
lock.l_start = 0;
lock.l_whence = SEEK_SET;
lock.l_len = 0;
if (fcntl(fd, F_SETLK, &lock) != -1)
fp = fdopen(fd, "r");
}
#endif
}
if (!fp) {
fprintf(stderr,
"%s: could not open config file %s: %s.\n",
argv0,
config_file,
strerror(errno));
exit(1);
}
/*
* xxx NetBSD now uses fparseln() to handle "logical lines", i.e. to
* support continuations, escapes, and comments
*/
while (fgets(line, BUFSIZ, fp)) {
struct conf_entry *tmpentry;
char *ep;
lnum++;
if ((line[0] == '\n') || (line[0] == '#'))
continue;
errline = strdup(line);
if (*(q = &errline[strlen(errline) - 1]) == '\n')
*q = '\0';
q = parse = missing_field(strsob(line), lnum, errline);
parse = strson(line);
if (!*parse) {
fprintf(stderr,
"%s: malformed line (missing fields):\n%6d:\t'%s'\n",
argv0,
lnum,
errline);
exit(1);
}
*parse = '\0';
if (*files) {
char **p;
for (p = files; *p; ++p) {
if (strcmp(*p, q) == 0)
break;
}
if (!*p) {
if (debug)
printf("ignoring %s, not on command line...\n", q);
continue;
}
}
if (!(tmpentry = (struct conf_entry *) malloc(sizeof(struct conf_entry)))) {
perror(argv0);
exit(1);
}
if (first == NULL) { /* have we started the list yet? */
working = tmpentry;
first = working;
} else {
working->next = tmpentry;
working = working->next;
}
working->log = strdup(q);
q = parse = missing_field(strsob(++parse), lnum, errline);
parse = strson(parse);
if (!*parse) {
fprintf(stderr,
"%s: malformed line (missing fields):\n%6d:\t'%s'\n",
argv0,
lnum,
errline);
exit(1);
}
*parse = '\0';
/*
* the next field is optional....
*
* if it contains a colon, then it is a uid:gid specification,
* otherwise there is no uid:gid specifiction.
*/
if ((group = strchr(q, ':')) != NULL) {
*group++ = '\0';
if (*q) {
if (!(isdigit(*q)) && *q != '-') {
working->user = strdup(q);
working->uid = NO_ID;
if (!write_metalog) {
if ((pass = getpwnam(q)) == NULL) {
fprintf(stderr,
"%s: error in config file; unknown user: '%s', in line:\n%6d:\t'%s'\n",
argv0,
q,
lnum,
errline);
exit(1);
}
working->uid = pass->pw_uid;
}
} else {
errno = 0;
working->uid = strtol(q, &ep, 10);
if (*ep || errno != 0) {
fprintf(stderr,
"%s: error in config file; invalid UID number: '%s', in line:\n%6d:\t'%s'\n",
argv0,
q,
lnum,
errline);
exit(1);
}
/* XXX should try to look up the username for this ID!!! */
working->user = NULL;
}
} else {
working->user = NULL;
working->uid = NO_ID;
}
q = group;
if (*q) {
if (!(isdigit(*q)) && *q != '-') {
working->group = strdup(q);
working->gid = NO_ID;
if (!write_metalog) {
if ((grp = getgrnam(q)) == NULL) {
fprintf(stderr,
"%s: error in config file; unknown group: '%s', in line:\n%6d:\t'%s'\n",
argv0,
q,
lnum,
errline);
exit(1);
}
working->gid = grp->gr_gid;
}
} else {
errno = 0;
working->gid = strtol(q, &ep, 10);
if (*ep || errno != 0) {
fprintf(stderr,
"%s: error in config file; invalid GID number: '%s', in line:\n%6d:\t'%s'\n",
argv0,
q,
lnum,
errline);
exit(1);
}
/* XXX should try to look up the groupname for this ID!!! */
working->group = NULL;
}
} else {
working->group = NULL;
working->gid = NO_ID;
}
q = parse = missing_field(strsob(++parse), lnum, errline);
parse = strson(parse);
if (!*parse) {
fprintf(stderr,
"%s: malformed line (missing fields):\n%6d:\t'%s'\n",
argv0,
lnum,
errline);
exit(1);
}
*parse = '\0';
} else {
working->user = working->group = NULL;
working->uid = working->gid = NO_ID;
}
/* XXX someday support "rwxrwxrwx" style permissions? */
/* XXX use *BSD setmode(3)??? */
errno = 0;
working->permissions = strtoul(q, &ep, 8);
if (*ep || errno != 0) {
fprintf(stderr,
"%s: error in config file; %s: '%s', in line:\n%6d:\t'%s'\n",
argv0,
strchr(q, '.') ? "old-style 'owner:group' field format" : "bad permissions specification",
q,
lnum,
errline);
exit(1);
}
if (working->permissions & ~(S_IRWXU|S_IRWXG|S_IRWXO)) {
fprintf(stderr,
"%s: error in config file; inappropriate permissions specification: '%s', in line:\n%6d:\t'%s'\n",
argv0,
q,
lnum,