* Exim - an Internet mail transport agent *
*************************************************/
+/* Copyright (c) The Exim Maintainers 2020 - 2023 */
/* Copyright (c) University of Cambridge 1995 - 2018 */
/* See the file NOTICE for conditions of use and distribution. */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
/* This header file contains type definitions and macros that I use as
/* If gcc is being used to compile Exim, we can use its facility for checking
-the arguments of printf-like functions. This is done by a macro. */
+the arguments of printf-like functions. This is done by a macro.
+OpenBSD has unfortunately taken to objecting to use of %n in printf
+so we have to give up on all of the available parameter checking. */
#if defined(__GNUC__) || defined(__clang__)
-# define PRINTF_FUNCTION(A,B) __attribute__((format(printf,A,B)))
+# ifndef __OpenBSD__
+# define PRINTF_FUNCTION(A,B) __attribute__((format(printf,A,B)))
+# endif
# define ARG_UNUSED __attribute__((__unused__))
+# define FUNC_MAYBE_UNUSED __attribute__((__unused__))
# define WARN_UNUSED_RESULT __attribute__((__warn_unused_result__))
# define ALLOC __attribute__((malloc))
-# define ALLOC_SIZE(A) __attribute__((alloc_size(A)))
# define NORETURN __attribute__((noreturn))
+# ifndef __clang__
+# define ALLOC_SIZE(A) __attribute__((alloc_size(A)))
+# else
+# define ALLOC_SIZE(A) /**/
+# endif
#else
-# define PRINTF_FUNCTION(A,B)
# define ARG_UNUSED /**/
+# define FUNC_MAYBE_UNUSED /**/
# define WARN_UNUSED_RESULT /**/
# define ALLOC /**/
# define ALLOC_SIZE(A) /**/
# define NORETURN /**/
#endif
+#ifndef PRINTF_FUNCTION
+# define PRINTF_FUNCTION(A,B) /**/
+#endif
+
#ifdef WANT_DEEPER_PRINTF_CHECKS
# define ALMOST_PRINTF(A, B) PRINTF_FUNCTION(A, B)
#else
-# define ALMOST_PRINTF(A, B)
+# define ALMOST_PRINTF(A, B) /**/
#endif
#define CUS (const unsigned char *)
#define USS (unsigned char **)
#define CUSS (const unsigned char **)
+#define CCSS (const char **)
/* The C library string functions expect "char *" arguments. Use macros to
avoid having to write a cast each time. We do this for string and file
#define Uchdir(s) chdir(CCS(s))
#define Uchmod(s,n) chmod(CCS(s),n)
#define Ufgets(b,n,f) fgets(CS(b),n,f)
-#define Ufopen(s,t) fopen(CCS(s),CCS(t))
+#define Ufopen(s,t) exim_fopen(CCS(s),CCS(t))
#define Ulink(s,t) link(CCS(s),CCS(t))
#define Ulstat(s,t) lstat(CCS(s),t)
-#ifdef O_BINARY /* This is for Cygwin, */
-#define Uopen(s,n,m) open(CCS(s),(n)|O_BINARY,m) /* where all files must */
-#else /* be opened as binary */
-#define Uopen(s,n,m) open(CCS(s),n,m) /* to avoid problems */
-#endif /* with CRLF endings. */
+#ifdef O_BINARY /* This is for Cygwin, */
+# define Uopen(s,n,m) exim_open(CCS(s),(n)|O_BINARY,m) /* where all files must */
+# define Uopen2(s,n) exim_open2(CCS(s),(n)|O_BINARY)
+#else /* be opened as binary */
+# define Uopen(s,n,m) exim_open(CCS(s),n,m) /* to avoid problems */
+# define Uopen2(s,n) exim_open2(CCS(s),n)
+#endif /* with CRLF endings. */
#define Uread(f,b,l) read(f,CS(b),l)
#define Urename(s,t) rename(CCS(s),CCS(t))
#define Ustat(s,t) stat(CCS(s),t)
-#define Ustrcat(s,t) __Ustrcat(s, CUS(t), __FUNCTION__, __LINE__)
#define Ustrchr(s,n) US strchr(CCS(s),n)
#define CUstrchr(s,n) CUS strchr(CCS(s),n)
#define CUstrerror(n) CUS strerror(n)
#define Ustrcmp(s,t) strcmp(CCS(s),CCS(t))
-#define Ustrcpy(s,t) __Ustrcpy(s, CUS(t), __FUNCTION__, __LINE__)
#define Ustrcpy_nt(s,t) strcpy(CS s, CCS t) /* no taint check */
#define Ustrcspn(s,t) strcspn(CCS(s),CCS(t))
#define Ustrftime(s,m,f,t) strftime(CS(s),m,f,t)
#define Ustrlen(s) (int)strlen(CCS(s))
-#define Ustrncat(s,t,n) __Ustrncat(s, CUS(t),n, __FUNCTION__, __LINE__)
#define Ustrncmp(s,t,n) strncmp(CCS(s),CCS(t),n)
-#define Ustrncpy(s,t,n) __Ustrncpy(s, CUS(t),n, __FUNCTION__, __LINE__)
#define Ustrncpy_nt(s,t,n) strncpy(CS s, CCS t, n) /* no taint check */
#define Ustrpbrk(s,t) strpbrk(CCS(s),CCS(t))
#define Ustrrchr(s,n) US strrchr(CCS(s),n)
#define Ustrtoul(s,t,b) strtoul(CCS(s),CSS(t),b)
#define Uunlink(s) unlink(CCS(s))
-extern void die_tainted(const uschar *, const uschar *, int);
-
-/* Predicate: if an address is in a tainted pool.
-By extension, a variable pointing to this address is tainted.
-*/
-
-static inline BOOL
-is_tainted(const void * p)
-{
-#if defined(COMPILE_UTILITY) || defined(MACRO_PREDEF)
-return FALSE;
-
-#elif defined(TAINT_CHECK_SLOW)
-extern BOOL is_tainted_fn(const void *);
-return is_tainted_fn(p);
-
+#if defined(EM_VERSION_C) || defined(LOCAL_SCAN) || defined(DLFUNC_IMPL)
+# define Ustrcat(s,t) strcat(CS(s), CCS(t))
+# define Ustrcpy(s,t) strcpy(CS(s), CCS(t))
+# define Ustrncat(s,t,n) strncat(CS(s), CCS(t), n)
+# define Ustrncpy(s,t,n) strncpy(CS(s), CCS(t), n)
#else
-extern void * tainted_base, * tainted_top;
-return p >= tainted_base && p < tainted_top;
-#endif
-}
-
-static inline uschar * __Ustrcat(uschar * dst, const uschar * src, const char * func, int line)
-{
-#if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
-if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrcat", CUS func, line);
-#endif
-return US strcat(CS dst, CCS src);
-}
-static inline uschar * __Ustrcpy(uschar * dst, const uschar * src, const char * func, int line)
-{
-#if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
-if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrcpy", CUS func, line);
-#endif
-return US strcpy(CS dst, CCS src);
-}
-static inline uschar * __Ustrncat(uschar * dst, const uschar * src, size_t n, const char * func, int line)
-{
-#if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
-if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrncat", CUS func, line);
-#endif
-return US strncat(CS dst, CCS src, n);
-}
-static inline uschar * __Ustrncpy(uschar * dst, const uschar * src, size_t n, const char * func, int line)
-{
-#if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
-if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrncpy", CUS func, line);
+# define Ustrcat(s,t) __Ustrcat(s, CUS(t), __FUNCTION__, __LINE__)
+# define Ustrcpy(s,t) __Ustrcpy(s, CUS(t), __FUNCTION__, __LINE__)
+# define Ustrncat(s,t,n) __Ustrncat(s, CUS(t), n, __FUNCTION__, __LINE__)
+# define Ustrncpy(s,t,n) __Ustrncpy(s, CUS(t), n, __FUNCTION__, __LINE__)
#endif
-return US strncpy(CS dst, CCS src, n);
-}
-/*XXX will likely need unchecked copy also */
#endif
/* End of mytypes.h */
git://git.exim.org / exim.git / blobdiff