From b750101eb236130cf056c675997decbac904cc49 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 17:35:18 +0200 Subject: Adding upstream version 252.22. Signed-off-by: Daniel Baumann --- src/basic/syslog-util.c | 131 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 131 insertions(+) create mode 100644 src/basic/syslog-util.c (limited to 'src/basic/syslog-util.c') diff --git a/src/basic/syslog-util.c b/src/basic/syslog-util.c new file mode 100644 index 0000000..0371922 --- /dev/null +++ b/src/basic/syslog-util.c @@ -0,0 +1,131 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include + +#include "sd-id128.h" + +#include "glob-util.h" +#include "hexdecoct.h" +#include "macro.h" +#include "path-util.h" +#include "string-table.h" +#include "syslog-util.h" +#include "unit-name.h" + +int syslog_parse_priority(const char **p, int *priority, bool with_facility) { + int a = 0, b = 0, c = 0; + const char *end; + size_t k; + + assert(p); + assert(*p); + assert(priority); + + if ((*p)[0] != '<') + return 0; + + end = strchr(*p, '>'); + if (!end) + return 0; + + k = end - *p; + assert(k > 0); + + if (k == 2) + c = undecchar((*p)[1]); + else if (k == 3) { + b = undecchar((*p)[1]); + c = undecchar((*p)[2]); + } else if (k == 4) { + a = undecchar((*p)[1]); + b = undecchar((*p)[2]); + c = undecchar((*p)[3]); + } else + return 0; + + if (a < 0 || b < 0 || c < 0 || + (!with_facility && (a || b || c > 7))) + return 0; + + if (with_facility) + *priority = a*100 + b*10 + c; + else + *priority = (*priority & LOG_FACMASK) | c; + + *p += k + 1; + return 1; +} + +static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { + [LOG_FAC(LOG_KERN)] = "kern", + [LOG_FAC(LOG_USER)] = "user", + [LOG_FAC(LOG_MAIL)] = "mail", + [LOG_FAC(LOG_DAEMON)] = "daemon", + [LOG_FAC(LOG_AUTH)] = "auth", + [LOG_FAC(LOG_SYSLOG)] = "syslog", + [LOG_FAC(LOG_LPR)] = "lpr", + [LOG_FAC(LOG_NEWS)] = "news", + [LOG_FAC(LOG_UUCP)] = "uucp", + [LOG_FAC(LOG_CRON)] = "cron", + [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", + [LOG_FAC(LOG_FTP)] = "ftp", + [LOG_FAC(LOG_LOCAL0)] = "local0", + [LOG_FAC(LOG_LOCAL1)] = "local1", + [LOG_FAC(LOG_LOCAL2)] = "local2", + [LOG_FAC(LOG_LOCAL3)] = "local3", + [LOG_FAC(LOG_LOCAL4)] = "local4", + [LOG_FAC(LOG_LOCAL5)] = "local5", + [LOG_FAC(LOG_LOCAL6)] = "local6", + [LOG_FAC(LOG_LOCAL7)] = "local7", +}; + +DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0)); + +bool log_facility_unshifted_is_valid(int facility) { + return facility >= 0 && facility <= LOG_FAC(~0); +} + +static const char *const log_level_table[] = { + [LOG_EMERG] = "emerg", + [LOG_ALERT] = "alert", + [LOG_CRIT] = "crit", + [LOG_ERR] = "err", + [LOG_WARNING] = "warning", + [LOG_NOTICE] = "notice", + [LOG_INFO] = "info", + [LOG_DEBUG] = "debug", +}; + +DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG); + +bool log_level_is_valid(int level) { + return level >= 0 && level <= LOG_DEBUG; +} + +/* The maximum size for a log namespace length. This is the file name size limit 255 minus the size of a + * formatted machine ID minus a separator char */ +#define LOG_NAMESPACE_MAX (NAME_MAX - (SD_ID128_STRING_MAX - 1) - 1) + +bool log_namespace_name_valid(const char *s) { + /* Let's make sure the namespace fits in a filename that is prefixed with the machine ID and a dot + * (so that /var/log/journal/. can be created based on it). Also make sure it + * is suitable as unit instance name, and does not contain fishy characters. */ + + if (!filename_is_valid(s)) + return false; + + if (strlen(s) > LOG_NAMESPACE_MAX) + return false; + + if (!unit_instance_is_valid(s)) + return false; + + if (!string_is_safe(s)) + return false; + + /* Let's avoid globbing for now */ + if (string_is_glob(s)) + return false; + + return true; +} -- cgit v1.2.3