b34387745a
We could use the standard (C11) _Noreturn qualifier, but it will be deprecated in C23, and replaced by C++'s [[noreturn]], which is compatible with the GCC attribute, so let's directly use the attribute, and in the future we'll be able to switch to [[]]. Signed-off-by: Alejandro Colomar <alx@kernel.org>
254 lines
5.9 KiB
C
254 lines
5.9 KiB
C
/* $Id$ */
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/* some useful defines */
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#ifndef _DEFINES_H_
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#define _DEFINES_H_
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#include "config.h"
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#include <stdbool.h>
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#include <locale.h>
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#define gettext_noop(String) (String)
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/* #define gettext_def(String) "#define String" */
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#ifdef ENABLE_NLS
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# include <libintl.h>
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# define _(Text) gettext (Text)
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#else
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# undef bindtextdomain
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# define bindtextdomain(Domain, Directory) (NULL)
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# undef textdomain
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# define textdomain(Domain) (NULL)
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# define _(Text) Text
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# define ngettext(Msgid1, Msgid2, N) \
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((N) == 1 ? (const char *) (Msgid1) : (const char *) (Msgid2))
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#endif
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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/*
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* crypt(3), crypt_gensalt(3), and their
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* feature test macros may be defined in here.
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*/
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#if HAVE_CRYPT_H
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# include <crypt.h>
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#endif
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#include <sys/time.h>
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#include <time.h>
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#ifdef HAVE_MEMSET_EXPLICIT
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# define memzero(ptr, size) memset_explicit((ptr), 0, (size))
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#elif defined HAVE_EXPLICIT_BZERO /* !HAVE_MEMSET_S */
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# define memzero(ptr, size) explicit_bzero((ptr), (size))
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#else /* !HAVE_MEMSET_S && HAVE_EXPLICIT_BZERO */
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static inline void memzero(void *ptr, size_t size)
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{
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ptr = memset(ptr, '\0', size);
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__asm__ __volatile__ ("" : : "r"(ptr) : "memory");
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}
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#endif /* !HAVE_MEMSET_S && !HAVE_EXPLICIT_BZERO */
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#define strzero(s) memzero(s, strlen(s)) /* warning: evaluates twice */
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#include <dirent.h>
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/*
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* Possible cases:
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* - /usr/include/shadow.h exists and includes the shadow group stuff.
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* - /usr/include/shadow.h exists, but we use our own gshadow.h.
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*/
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#include <shadow.h>
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#if defined(SHADOWGRP) && !defined(GSHADOW)
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#include "gshadow_.h"
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#endif
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#include <limits.h>
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#ifndef NGROUPS_MAX
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#ifdef NGROUPS
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#define NGROUPS_MAX NGROUPS
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#else
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#define NGROUPS_MAX 64
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#endif
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#endif
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#include <syslog.h>
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#ifndef LOG_WARN
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#define LOG_WARN LOG_WARNING
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#endif
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/* LOG_NOWAIT is deprecated */
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#ifndef LOG_NOWAIT
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#define LOG_NOWAIT 0
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#endif
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/* LOG_AUTH is deprecated, use LOG_AUTHPRIV instead */
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#ifndef LOG_AUTHPRIV
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#define LOG_AUTHPRIV LOG_AUTH
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#endif
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/* cleaner than lots of #ifdefs everywhere - use this as follows:
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SYSLOG((LOG_CRIT, "user %s cracked root", user)); */
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#ifdef ENABLE_NLS
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/* Temporarily set LC_TIME to "C" to avoid strange dates in syslog.
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This is a workaround for a more general syslog(d) design problem -
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syslogd should log the current system time for each event, and not
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trust the formatted time received from the unix domain (or worse,
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UDP) socket. -MM */
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/* Avoid translated PAM error messages: Set LC_ALL to "C".
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* --Nekral */
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#define SYSLOG(x) \
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do { \
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char *old_locale = setlocale (LC_ALL, NULL); \
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char *saved_locale = NULL; \
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if (NULL != old_locale) { \
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saved_locale = strdup (old_locale); \
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} \
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if (NULL != saved_locale) { \
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(void) setlocale (LC_ALL, "C"); \
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} \
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syslog x ; \
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if (NULL != saved_locale) { \
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(void) setlocale (LC_ALL, saved_locale); \
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free (saved_locale); \
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} \
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} while (false)
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#else /* !ENABLE_NLS */
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#define SYSLOG(x) syslog x
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#endif /* !ENABLE_NLS */
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/* The default syslog settings can now be changed here,
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in just one place. */
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#ifndef SYSLOG_OPTIONS
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/* #define SYSLOG_OPTIONS (LOG_PID | LOG_CONS | LOG_NOWAIT) */
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#define SYSLOG_OPTIONS (LOG_PID)
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#endif
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#ifndef SYSLOG_FACILITY
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#define SYSLOG_FACILITY LOG_AUTHPRIV
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#endif
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#define OPENLOG(progname) openlog(progname, SYSLOG_OPTIONS, SYSLOG_FACILITY)
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#include <termios.h>
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#define STTY(fd, termio) tcsetattr(fd, TCSANOW, termio)
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#define GTTY(fd, termio) tcgetattr(fd, termio)
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#define TERMIO struct termios
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/*
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* Password aging constants
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*
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* DAY - seconds / day
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* WEEK - seconds / week
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* SCALE - seconds / aging unit
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*/
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/* Solaris defines this in shadow.h */
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#ifndef DAY
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#define DAY (24L*3600L)
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#endif
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#define WEEK (7*DAY)
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#ifdef ITI_AGING
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#define SCALE 1
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#else
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#define SCALE DAY
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#endif
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#define WIDTHOF(x) (sizeof(x) * CHAR_BIT)
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#define NITEMS(arr) (sizeof((arr)) / sizeof((arr)[0]))
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/* Copy string pointed by B to array A with size checking. It was originally
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in lmain.c but is _very_ useful elsewhere. Some setuid root programs with
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very sloppy coding used to assume that BUFSIZ will always be enough... */
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/* danger - side effects */
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#define STRFCPY(A,B) \
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(strncpy((A), (B), sizeof(A) - 1), (A)[sizeof(A) - 1] = '\0')
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#ifndef PASSWD_FILE
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#define PASSWD_FILE "/etc/passwd"
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#endif
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#ifndef GROUP_FILE
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#define GROUP_FILE "/etc/group"
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#endif
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#ifndef SHADOW_FILE
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#define SHADOW_FILE "/etc/shadow"
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#endif
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#ifdef SHADOWGRP
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#ifndef SGROUP_FILE
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#define SGROUP_FILE "/etc/gshadow"
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#endif
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#endif
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/*
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* string to use for the pw_passwd field in /etc/passwd when using
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* shadow passwords - most systems use "x" but there are a few
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* exceptions, so it can be changed here if necessary. --marekm
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*/
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#ifndef SHADOW_PASSWD_STRING
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#define SHADOW_PASSWD_STRING "x"
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#endif
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#define SHADOW_SP_FLAG_UNSET ((unsigned long int)-1)
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#ifdef WITH_AUDIT
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#ifdef __u8 /* in case we use pam < 0.80 */
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#undef __u8
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#endif
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#ifdef __u32
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#undef __u32
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#endif
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#include <libaudit.h>
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#endif
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/* To be used for verified unused parameters */
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#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
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# define unused __attribute__((unused))
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# define NORETURN __attribute__((__noreturn__))
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# define format_attr(type, index, check) __attribute__((format (type, index, check)))
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#else
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# define unused
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# define NORETURN
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# define format_attr(type, index, check)
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#endif
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/* Maximum length of usernames */
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#include <utmp.h>
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#define USER_NAME_MAX_LENGTH (sizeof (((struct utmp *)NULL)->ut_user))
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/* Maximum length of passwd entry */
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#define PASSWD_ENTRY_MAX_LENGTH 32768
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#if (__GNUC__ >= 11) && !defined(__clang__)
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# define ATTR_MALLOC(deallocator) [[gnu::malloc(deallocator)]]
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#else
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# define ATTR_MALLOC(deallocator)
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#endif
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#ifdef HAVE_SECURE_GETENV
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# define shadow_getenv(name) secure_getenv(name)
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# else
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# define shadow_getenv(name) getenv(name)
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#endif
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#endif /* _DEFINES_H_ */
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