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https://github.com/freebsd/freebsd-src
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Fix interval-based rotations when the -t flag is used. In this case, find
the most-recently archived logfile and use its mtime to determine whether or not to rotate, as in the non-timestamped case. Previously we would just try to use the mtime of <logfile>.0, which always results in a rotation since it generally doesn't exist in the -t case. PR: bin/166448 Approved by: emaste (co-mentor) Tested by: Marco Steinbach <coco executive-computing.de> MFC after: 2 weeks
This commit is contained in:
Mark Johnston
parent
1da66a2776
commit
91ba008fc5
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=248776
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@ -276,7 +276,7 @@ static void parse_args(int argc, char **argv);
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static int parse_doption(const char *doption);
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static void usage(void);
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static int log_trim(const char *logname, const struct conf_entry *log_ent);
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static int age_old_log(char *file);
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static int age_old_log(const char *file);
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static void savelog(char *from, char *to);
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static void createdir(const struct conf_entry *ent, char *dirpart);
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static void createlog(const struct conf_entry *ent);
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@ -1446,6 +1446,66 @@ oldlog_entry_compare(const void *a, const void *b)
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return (0);
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}
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/*
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* Check whether the file corresponding to dp is an archive of the logfile
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* logfname, based on the timefnamefmt format string. Return true and fill out
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* tm if this is the case; otherwise return false.
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*/
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static int
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validate_old_timelog(const struct dirent *dp, const char *logfname, struct tm *tm)
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{
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size_t logfname_len;
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char *s;
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int c;
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logfname_len = strlen(logfname);
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if (dp->d_type != DT_REG)
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return (0);
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/* Ignore everything but files with our logfile prefix. */
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if (strncmp(dp->d_name, logfname, logfname_len) != 0)
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return (0);
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/* Ignore the actual non-rotated logfile. */
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if (dp->d_namlen == logfname_len)
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return (0);
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/*
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* Make sure we created have found a logfile, so the
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* postfix is valid, IE format is: '.<time>(.[bgx]z)?'.
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*/
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if (dp->d_name[logfname_len] != '.') {
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if (verbose)
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printf("Ignoring %s which has unexpected "
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"extension '%s'\n", dp->d_name,
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&dp->d_name[logfname_len]);
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return (0);
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}
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if ((s = strptime(&dp->d_name[logfname_len + 1],
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timefnamefmt, tm)) == NULL) {
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/*
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* We could special case "old" sequentially named logfiles here,
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* but we do not as that would require special handling to
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* decide which one was the oldest compared to "new" time based
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* logfiles.
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*/
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if (verbose)
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printf("Ignoring %s which does not "
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"match time format\n", dp->d_name);
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return (0);
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}
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for (c = 0; c < COMPRESS_TYPES; c++)
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if (strcmp(s, compress_type[c].suffix) == 0)
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/* We're done. */
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return (1);
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if (verbose)
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printf("Ignoring %s which has unexpected extension '%s'\n",
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dp->d_name, s);
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return (0);
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}
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/*
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* Delete the oldest logfiles, when using time based filenames.
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*/
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@ -1453,14 +1513,12 @@ static void
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delete_oldest_timelog(const struct conf_entry *ent, const char *archive_dir)
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{
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char *logfname, *s, *dir, errbuf[80];
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int dir_fd, i, logcnt, max_logcnt, valid;
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int dir_fd, i, logcnt, max_logcnt;
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struct oldlog_entry *oldlogs;
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size_t logfname_len;
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struct dirent *dp;
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const char *cdir;
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struct tm tm;
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DIR *dirp;
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int c;
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oldlogs = malloc(MAX_OLDLOGS * sizeof(struct oldlog_entry));
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max_logcnt = MAX_OLDLOGS;
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@ -1478,7 +1536,6 @@ delete_oldest_timelog(const struct conf_entry *ent, const char *archive_dir)
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err(1, "basename()");
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if ((logfname = strdup(s)) == NULL)
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err(1, "strdup()");
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logfname_len = strlen(logfname);
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if (strcmp(logfname, "/") == 0)
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errx(1, "Invalid log filename - became '/'");
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@ -1490,51 +1547,9 @@ delete_oldest_timelog(const struct conf_entry *ent, const char *archive_dir)
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err(1, "Cannot open log directory '%s'", dir);
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dir_fd = dirfd(dirp);
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while ((dp = readdir(dirp)) != NULL) {
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if (dp->d_type != DT_REG)
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if (validate_old_timelog(dp, logfname, &tm) == 0)
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continue;
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/* Ignore everything but files with our logfile prefix */
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if (strncmp(dp->d_name, logfname, logfname_len) != 0)
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continue;
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/* Ignore the actual non-rotated logfile */
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if (dp->d_namlen == logfname_len)
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continue;
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/*
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* Make sure we created have found a logfile, so the
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* postfix is valid, IE format is: '.<time>(.[bg]z)?'.
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*/
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if (dp->d_name[logfname_len] != '.') {
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if (verbose)
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printf("Ignoring %s which has unexpected "
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"extension '%s'\n", dp->d_name,
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&dp->d_name[logfname_len]);
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continue;
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}
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if ((s = strptime(&dp->d_name[logfname_len + 1],
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timefnamefmt, &tm)) == NULL) {
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/*
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* We could special case "old" sequentially
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* named logfiles here, but we do not as that
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* would require special handling to decide
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* which one was the oldest compared to "new"
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* time based logfiles.
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*/
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if (verbose)
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printf("Ignoring %s which does not "
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"match time format\n", dp->d_name);
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continue;
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}
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for (c = 0; c < COMPRESS_TYPES; c++)
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if (strcmp(s, compress_type[c].suffix) == 0)
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valid = 1;
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if (valid != 1) {
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if (verbose)
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printf("Ignoring %s which has unexpected "
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"extension '%s'\n", dp->d_name, s);
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continue;
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}
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/*
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* We should now have old an old rotated logfile, so
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* add it to the 'list'.
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@ -2260,13 +2275,66 @@ sizefile(const char *file)
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return (kbytes(dbtob(sb.st_blocks)));
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}
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/* Return the age of old log file (file.0) */
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/*
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* Return the mtime of the most recent archive of the logfile, using timestamp
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* based filenames.
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*/
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static time_t
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mtime_old_timelog(const char *file)
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{
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struct stat sb;
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struct tm tm;
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int dir_fd;
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time_t t;
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struct dirent *dp;
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DIR *dirp;
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char *s, *logfname, *dir;
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t = -1;
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if ((dir = dirname(file)) == NULL) {
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warn("dirname() of '%s'", file);
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return (t);
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}
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if ((s = basename(file)) == NULL) {
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warn("basename() of '%s'", file);
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return (t);
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} else if (s[0] == '/') {
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warnx("Invalid log filename '%s'", s);
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return (t);
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} else if ((logfname = strdup(s)) == NULL)
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err(1, "strdup()");
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if ((dirp = opendir(dir)) == NULL) {
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warn("Cannot open log directory '%s'", dir);
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return (t);
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}
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dir_fd = dirfd(dirp);
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/* Open the archive dir and find the most recent archive of logfname. */
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while ((dp = readdir(dirp)) != NULL) {
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if (validate_old_timelog(dp, logfname, &tm) == 0)
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continue;
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if (fstatat(dir_fd, logfname, &sb, 0) == -1) {
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warn("Cannot stat '%s'", file);
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continue;
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}
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if (t < sb.st_mtime)
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t = sb.st_mtime;
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}
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closedir(dirp);
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return (t);
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}
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/* Return the age in hours of the most recent archive of the logfile. */
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static int
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age_old_log(char *file)
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age_old_log(const char *file)
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{
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struct stat sb;
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const char *logfile_suffix;
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char tmp[MAXPATHLEN + sizeof(".0") + COMPRESS_SUFFIX_MAXLEN + 1];
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time_t mtime;
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if (archtodir) {
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char *p;
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@ -2295,14 +2363,22 @@ age_old_log(char *file)
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(void) strlcpy(tmp, file, sizeof(tmp));
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}
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strlcat(tmp, ".0", sizeof(tmp));
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logfile_suffix = get_logfile_suffix(tmp);
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if (logfile_suffix == NULL)
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return (-1);
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(void) strlcat(tmp, logfile_suffix, sizeof(tmp));
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if (stat(tmp, &sb) < 0)
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return (-1);
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return ((int)(ptimeget_secs(timenow) - sb.st_mtime + 1800) / 3600);
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if (timefnamefmt != NULL) {
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mtime = mtime_old_timelog(tmp);
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if (mtime == -1)
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return (-1);
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} else {
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strlcat(tmp, ".0", sizeof(tmp));
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logfile_suffix = get_logfile_suffix(tmp);
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if (logfile_suffix == NULL)
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return (-1);
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(void) strlcat(tmp, logfile_suffix, sizeof(tmp));
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if (stat(tmp, &sb) < 0)
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return (-1);
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mtime = sb.st_mtime;
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}
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return ((int)(ptimeget_secs(timenow) - mtime + 1800) / 3600);
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}
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/* Skip Over Blanks */
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