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Diffstat (limited to 'include/sudo_util.h')
| -rw-r--r-- | include/sudo_util.h | 375 |
1 files changed, 375 insertions, 0 deletions
diff --git a/include/sudo_util.h b/include/sudo_util.h new file mode 100644 index 0000000..100d5eb --- /dev/null +++ b/include/sudo_util.h @@ -0,0 +1,375 @@ +/* + * SPDX-License-Identifier: ISC + * + * Copyright (c) 2013-2022 Todd C. Miller <Todd.Miller@sudo.ws> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#ifndef SUDO_UTIL_H +#define SUDO_UTIL_H + +#include <sys/types.h> /* for dev_t, mode_t, gid_t, size_t, ssize_t, uid_t */ +#ifdef HAVE_STDBOOL_H +# include <stdbool.h> +#else +# include "compat/stdbool.h" +#endif /* HAVE_STDBOOL_H */ + +#ifdef __TANDEM +# define ROOT_UID 65535 +#else +# define ROOT_UID 0 +#endif +#define ROOT_GID 0 + +#ifndef TIME_T_MIN +# if SIZEOF_TIME_T == 8 +# define TIME_T_MIN LLONG_MIN +# else +# define TIME_T_MIN INT_MIN +# endif +#endif +#ifndef TIME_T_MAX +# if SIZEOF_TIME_T == 8 +# define TIME_T_MAX LLONG_MAX +# else +# define TIME_T_MAX INT_MAX +# endif +#endif + +/* + * Macros for operating on struct timeval. + */ +#define sudo_timevalclear(tv) ((tv)->tv_sec = (tv)->tv_usec = 0) + +#define sudo_timevalisset(tv) ((tv)->tv_sec || (tv)->tv_usec) + +#define sudo_timevalcmp(tv1, tv2, op) \ + (((tv1)->tv_sec == (tv2)->tv_sec) ? \ + ((tv1)->tv_usec op (tv2)->tv_usec) : \ + ((tv1)->tv_sec op (tv2)->tv_sec)) + +#define sudo_timevaladd(tv1, tv2, tv3) \ + do { \ + (tv3)->tv_sec = (tv1)->tv_sec + (tv2)->tv_sec; \ + (tv3)->tv_usec = (tv1)->tv_usec + (tv2)->tv_usec; \ + if ((tv3)->tv_usec >= 1000000) { \ + (tv3)->tv_sec++; \ + (tv3)->tv_usec -= 1000000; \ + } \ + } while (0) + +#define sudo_timevalsub(tv1, tv2, tv3) \ + do { \ + (tv3)->tv_sec = (tv1)->tv_sec - (tv2)->tv_sec; \ + (tv3)->tv_usec = (tv1)->tv_usec - (tv2)->tv_usec; \ + if ((tv3)->tv_usec < 0) { \ + (tv3)->tv_sec--; \ + (tv3)->tv_usec += 1000000; \ + } \ + } while (0) + +#ifndef TIMEVAL_TO_TIMESPEC +# define TIMEVAL_TO_TIMESPEC(tv, ts) \ + do { \ + (ts)->tv_sec = (tv)->tv_sec; \ + (ts)->tv_nsec = (tv)->tv_usec * 1000; \ + } while (0) +#endif + +/* + * Macros for operating on struct timespec. + */ +#define sudo_timespecclear(ts) ((ts)->tv_sec = (ts)->tv_nsec = 0) + +#define sudo_timespecisset(ts) ((ts)->tv_sec || (ts)->tv_nsec) + +#define sudo_timespeccmp(ts1, ts2, op) \ + (((ts1)->tv_sec == (ts2)->tv_sec) ? \ + ((ts1)->tv_nsec op (ts2)->tv_nsec) : \ + ((ts1)->tv_sec op (ts2)->tv_sec)) + +#define sudo_timespecadd(ts1, ts2, ts3) \ + do { \ + (ts3)->tv_sec = (ts1)->tv_sec + (ts2)->tv_sec; \ + (ts3)->tv_nsec = (ts1)->tv_nsec + (ts2)->tv_nsec; \ + while ((ts3)->tv_nsec >= 1000000000) { \ + (ts3)->tv_sec++; \ + (ts3)->tv_nsec -= 1000000000; \ + } \ + } while (0) + +#define sudo_timespecsub(ts1, ts2, ts3) \ + do { \ + (ts3)->tv_sec = (ts1)->tv_sec - (ts2)->tv_sec; \ + (ts3)->tv_nsec = (ts1)->tv_nsec - (ts2)->tv_nsec; \ + while ((ts3)->tv_nsec < 0) { \ + (ts3)->tv_sec--; \ + (ts3)->tv_nsec += 1000000000; \ + } \ + } while (0) + +#ifndef TIMESPEC_TO_TIMEVAL +# define TIMESPEC_TO_TIMEVAL(tv, ts) \ + do { \ + (tv)->tv_sec = (ts)->tv_sec; \ + (tv)->tv_usec = (ts)->tv_nsec / 1000; \ + } while (0) +#endif + +/* + * The timespec version of st_mtime may vary on different platforms. + */ +#if defined(HAVE_ST_MTIM) +# if defined(HAVE_ST__TIM) +# define SUDO_ST_MTIM st_mtim.st__tim +# else +# define SUDO_ST_MTIM st_mtim +# endif +#elif defined(HAVE_ST_MTIMESPEC) +# define SUDO_ST_MTIM st_mtimespec +#endif + +/* + * Macro to extract mtime as timespec. + * If there is no way to set the timestamp using nanosecond precision, + * we only fetch microsecond precision. Otherwise there is a mismatch + * between the timestamp we read and the one we wrote. + */ +#if defined(SUDO_ST_MTIM) +# if defined(HAVE_FUTIMENS) && defined(HAVE_UTIMENSAT) +# define mtim_get(_x, _y) do { (_y).tv_sec = (_x)->SUDO_ST_MTIM.tv_sec; (_y).tv_nsec = (_x)->SUDO_ST_MTIM.tv_nsec; } while (0) +# else +# define mtim_get(_x, _y) do { (_y).tv_sec = (_x)->SUDO_ST_MTIM.tv_sec; (_y).tv_nsec = ((_x)->SUDO_ST_MTIM.tv_nsec / 1000) * 1000; } while (0) +# endif +#elif defined(HAVE_ST_NMTIME) +# define mtim_get(_x, _y) do { (_y).tv_sec = (_x)->st_mtime; (_y).tv_nsec = (_x)->st_nmtime; } while (0) +#else +# define mtim_get(_x, _y) do { (_y).tv_sec = (_x)->st_mtime; (_y).tv_nsec = 0; } while (0) +#endif /* HAVE_ST_MTIM */ + +/* sizeof() that returns a signed value */ +#define ssizeof(_x) ((ssize_t)sizeof(_x)) + +/* Bit map macros. */ +#define sudo_setbit(_a, _i) ((_a)[(_i) / NBBY] |= 1 << ((_i) % NBBY)) +#define sudo_clrbit(_a, _i) ((_a)[(_i) / NBBY] &= ~(1<<((_i) % NBBY))) +#define sudo_isset(_a, _i) ((_a)[(_i) / NBBY] & (1<<((_i) % NBBY))) +#define sudo_isclr(_a, _i) (((_a)[(_i) / NBBY] & (1<<((_i) % NBBY))) == 0) + +/* sudo_parseln() flags */ +#define PARSELN_COMM_BOL 0x01 /* comments only at beginning of line */ +#define PARSELN_CONT_IGN 0x02 /* ignore line continuation char */ + +/* + * Macros to quiet gcc's warn_unused_result attribute. + */ +#ifdef __GNUC__ +# define ignore_result(x) do { \ + __typeof__(x) y = (x); \ + (void)y; \ +} while(0) +#else +# define ignore_result(x) (void)(x) +#endif + +/* Forward struct declarations. */ +struct stat; + +/* aix.c */ +sudo_dso_public int aix_getauthregistry_v1(char *user, char *saved_registry); +#define aix_getauthregistry(_a, _b) aix_getauthregistry_v1((_a), (_b)) +sudo_dso_public int aix_prep_user_v1(char *user, const char *tty); +#define aix_prep_user(_a, _b) aix_prep_user_v1((_a), (_b)) +sudo_dso_public int aix_restoreauthdb_v1(void); +#define aix_restoreauthdb() aix_restoreauthdb_v1() +sudo_dso_public int aix_setauthdb_v1(char *user); +sudo_dso_public int aix_setauthdb_v2(char *user, char *registry); +#define aix_setauthdb(_a, _b) aix_setauthdb_v2((_a), (_b)) + +/* basename.c */ +sudo_dso_public char *sudo_basename_v1(const char *filename); +#define sudo_basename(_a) sudo_basename_v1(_a) + +/* gethostname.c */ +sudo_dso_public char *sudo_gethostname_v1(void); +#define sudo_gethostname() sudo_gethostname_v1() + +/* gettime.c */ +sudo_dso_public int sudo_gettime_awake_v1(struct timespec *ts); +#define sudo_gettime_awake(_a) sudo_gettime_awake_v1((_a)) +sudo_dso_public int sudo_gettime_mono_v1(struct timespec *ts); +#define sudo_gettime_mono(_a) sudo_gettime_mono_v1((_a)) +sudo_dso_public int sudo_gettime_real_v1(struct timespec *ts); +#define sudo_gettime_real(_a) sudo_gettime_real_v1((_a)) + +/* gidlist.c */ +sudo_dso_public int sudo_parse_gids_v1(const char *gidstr, const gid_t *basegid, GETGROUPS_T **gidsp); +#define sudo_parse_gids(_a, _b, _c) sudo_parse_gids_v1((_a), (_b), (_c)) + +/* getgrouplist.c */ +sudo_dso_public int sudo_getgrouplist2_v1(const char *name, gid_t basegid, GETGROUPS_T **groupsp, int *ngroupsp); +#define sudo_getgrouplist2(_a, _b, _c, _d) sudo_getgrouplist2_v1((_a), (_b), (_c), (_d)) + +/* hexchar.c */ +sudo_dso_public int sudo_hexchar_v1(const char *s); +#define sudo_hexchar(_a) sudo_hexchar_v1(_a) + +/* key_val.c */ +sudo_dso_public char *sudo_new_key_val_v1(const char *key, const char *value); +#define sudo_new_key_val(_a, _b) sudo_new_key_val_v1((_a), (_b)) + +/* locking.c */ +#define SUDO_LOCK 1 /* lock a file */ +#define SUDO_TLOCK 2 /* test & lock a file (non-blocking) */ +#define SUDO_UNLOCK 4 /* unlock a file */ +sudo_dso_public bool sudo_lock_file_v1(int fd, int action); +#define sudo_lock_file(_a, _b) sudo_lock_file_v1((_a), (_b)) +sudo_dso_public bool sudo_lock_region_v1(int fd, int action, off_t len); +#define sudo_lock_region(_a, _b, _c) sudo_lock_region_v1((_a), (_b), (_c)) + +/* logfac.c */ +sudo_dso_public bool sudo_str2logfac_v1(const char *str, int *logfac); +#define sudo_str2logfac(_a, _b) sudo_str2logfac_v1((_a), (_b)) +sudo_dso_public const char *sudo_logfac2str_v1(int num); +#define sudo_logfac2str(_a) sudo_logfac2str_v1((_a)) + +/* logpri.c */ +sudo_dso_public bool sudo_str2logpri_v1(const char *str, int *logpri); +#define sudo_str2logpri(_a, _b) sudo_str2logpri_v1((_a), (_b)) +sudo_dso_public const char *sudo_logpri2str_v1(int num); +#define sudo_logpri2str(_a) sudo_logpri2str_v1((_a)) + +/* mkdir_parents.c */ +sudo_dso_public bool sudo_mkdir_parents_v1(const char *path, uid_t uid, gid_t gid, mode_t mode, bool quiet); +#define sudo_mkdir_parents(_a, _b, _c, _d, _e) sudo_mkdir_parents_v1((_a), (_b), (_c), (_d), (_e)) +sudo_dso_public int sudo_open_parent_dir_v1(const char *path, uid_t uid, gid_t gid, mode_t mode, bool quiet); +#define sudo_open_parent_dir(_a, _b, _c, _d, _e) sudo_open_parent_dir_v1((_a), (_b), (_c), (_d), (_e)) + +/* mmap_alloc.c */ +sudo_dso_public void *sudo_mmap_alloc_v1(size_t size) sudo_malloclike; +#define sudo_mmap_alloc(_a) sudo_mmap_alloc_v1(_a) +sudo_dso_public void *sudo_mmap_allocarray_v1(size_t count, size_t size) sudo_malloclike; +#define sudo_mmap_allocarray(_a, _b) sudo_mmap_allocarray_v1((_a), (_b)) +sudo_dso_public char *sudo_mmap_strdup_v1(const char *str); +#define sudo_mmap_strdup(_a) sudo_mmap_strdup_v1(_a) +sudo_dso_public void sudo_mmap_free_v1(void *ptr); +#define sudo_mmap_free(_a) sudo_mmap_free_v1(_a) +sudo_dso_public int sudo_mmap_protect_v1(void *ptr); +#define sudo_mmap_protect(_a) sudo_mmap_protect_v1(_a) + +/* multiarch.c */ +sudo_dso_public char *sudo_stat_multiarch_v1(const char *path, struct stat *sb); +#define sudo_stat_multiarch(_a, _b) sudo_stat_multiarch_v1((_a), (_b)) + +/* parseln.c */ +sudo_dso_public ssize_t sudo_parseln_v1(char **buf, size_t *bufsize, unsigned int *lineno, FILE *fp); +sudo_dso_public ssize_t sudo_parseln_v2(char **buf, size_t *bufsize, unsigned int *lineno, FILE *fp, int flags); +#define sudo_parseln(_a, _b, _c, _d, _e) sudo_parseln_v2((_a), (_b), (_c), (_d), (_e)) + +/* progname.c */ +sudo_dso_public void initprogname(const char *); +sudo_dso_public void initprogname2(const char *, const char * const *); + +/* rcstr.c */ +sudo_dso_public char *sudo_rcstr_dup(const char *src); +sudo_dso_public char *sudo_rcstr_alloc(size_t len) sudo_malloclike; +sudo_dso_public char *sudo_rcstr_addref(const char *s); +sudo_dso_public void sudo_rcstr_delref(const char *s); + +/* regex.c */ +sudo_dso_public bool sudo_regex_compile_v1(void *v, const char *pattern, const char **errstr); +#define sudo_regex_compile(_a, _b, _c) sudo_regex_compile_v1((_a), (_b), (_c)) + +/* roundup.c */ +sudo_dso_public unsigned int sudo_pow2_roundup_v1(unsigned int len); +#define sudo_pow2_roundup(_a) sudo_pow2_roundup_v1((_a)) + +/* secure_path.c */ +#define SUDO_PATH_SECURE 0 +#define SUDO_PATH_MISSING -1 +#define SUDO_PATH_BAD_TYPE -2 +#define SUDO_PATH_WRONG_OWNER -3 +#define SUDO_PATH_WORLD_WRITABLE -4 +#define SUDO_PATH_GROUP_WRITABLE -5 +sudo_dso_public int sudo_secure_dir_v1(const char *path, uid_t uid, gid_t gid, struct stat *sb); +#define sudo_secure_dir(_a, _b, _c, _d) sudo_secure_dir_v1((_a), (_b), (_c), (_d)) +sudo_dso_public int sudo_secure_file_v1(const char *path, uid_t uid, gid_t gid, struct stat *sb); +#define sudo_secure_file(_a, _b, _c, _d) sudo_secure_file_v1((_a), (_b), (_c), (_d)) +sudo_dso_public int sudo_secure_open_file_v1(const char *path, uid_t uid, gid_t gid, struct stat *sb, int *error); +#define sudo_secure_open_file(_a, _b, _c, _d, _e) sudo_secure_open_file_v1((_a), (_b), (_c), (_d), (_e)) +sudo_dso_public int sudo_secure_open_dir_v1(const char *path, uid_t uid, gid_t gid, struct stat *sb, int *error); +#define sudo_secure_open_dir(_a, _b, _c, _d, _e) sudo_secure_open_dir_v1((_a), (_b), (_c), (_d), (_e)) + +/* setgroups.c */ +sudo_dso_public int sudo_setgroups_v1(int ngids, const GETGROUPS_T *gids); +#define sudo_setgroups(_a, _b) sudo_setgroups_v1((_a), (_b)) + +/* strsplit.c */ +sudo_dso_public const char *sudo_strsplit_v1(const char *str, const char *endstr, const char *sep, const char **last); +#define sudo_strsplit(_a, _b, _c, _d) sudo_strsplit_v1(_a, _b, _c, _d) + +/* strtobool.c */ +sudo_dso_public int sudo_strtobool_v1(const char *str); +#define sudo_strtobool(_a) sudo_strtobool_v1((_a)) + +/* strtonum.c */ +/* Not versioned for historical reasons. */ +sudo_dso_public long long sudo_strtonum(const char *, long long, long long, const char **); +/* Not currently exported. */ +long long sudo_strtonumx(const char *str, long long minval, long long maxval, char **endp, const char **errstrp); + +/* strtoid.c */ +sudo_dso_public id_t sudo_strtoid_v1(const char *str, const char *sep, char **endp, const char **errstr); +sudo_dso_public id_t sudo_strtoid_v2(const char *str, const char **errstr); +#define sudo_strtoid(_a, _b) sudo_strtoid_v2((_a), (_b)) +sudo_dso_public id_t sudo_strtoidx_v1(const char *str, const char *sep, char **endp, const char **errstr); +#define sudo_strtoidx(_a, _b, _c, _d) sudo_strtoidx_v1((_a), (_b), (_c), (_d)) + +/* strtomode.c */ +sudo_dso_public int sudo_strtomode_v1(const char *cp, const char **errstr); +#define sudo_strtomode(_a, _b) sudo_strtomode_v1((_a), (_b)) + +/* sudo_printf.c */ +extern int (*sudo_printf)(int msg_type, const char *fmt, ...); + +/* term.c */ +sudo_dso_public bool sudo_term_cbreak_v1(int fd); +#define sudo_term_cbreak(_a) sudo_term_cbreak_v1((_a)) +sudo_dso_public bool sudo_term_copy_v1(int src, int dst); +#define sudo_term_copy(_a, _b) sudo_term_copy_v1((_a), (_b)) +sudo_dso_public bool sudo_term_noecho_v1(int fd); +#define sudo_term_noecho(_a) sudo_term_noecho_v1((_a)) +sudo_dso_public bool sudo_term_raw_v1(int fd, int isig); +#define sudo_term_raw(_a, _b) sudo_term_raw_v1((_a), (_b)) +sudo_dso_public bool sudo_term_restore_v1(int fd, bool flush); +#define sudo_term_restore(_a, _b) sudo_term_restore_v1((_a), (_b)) +sudo_dso_public bool sudo_term_is_raw_v1(int fd); +#define sudo_term_is_raw(_a) sudo_term_is_raw_v1((_a)) + +/* ttyname_dev.c */ +sudo_dso_public char *sudo_ttyname_dev_v1(dev_t tdev, char *name, size_t namelen); +#define sudo_ttyname_dev(_a, _b, _c) sudo_ttyname_dev_v1((_a), (_b), (_c)) + +/* ttysize.c */ +sudo_dso_public void sudo_get_ttysize_v1(int *rowp, int *colp); +#define sudo_get_ttysize(_a, _b) sudo_get_ttysize_v1((_a), (_b)) + +/* uuid.c */ +sudo_dso_public void sudo_uuid_create_v1(unsigned char uuid_out[16]); +#define sudo_uuid_create(_a) sudo_uuid_create_v1((_a)) +sudo_dso_public char *sudo_uuid_to_string_v1(unsigned char uuid[16], char *dst, size_t dstsiz); +#define sudo_uuid_to_string(_a, _b, _c) sudo_uuid_to_string_v1((_a), (_b), (_c)) + +#endif /* SUDO_UTIL_H */ |