config.h

   1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
   2  *@ Some constants etc. for which adjustments may be desired.
   3  *@ This is included after all the (system) headers.
   4  *
   5  * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
   6  * Copyright (c) 2012 - 2017 Steffen (Daode) Nurpmeso <steffen@sdaoden.eu>.
   7  */
   8 /*
   9  * Copyright (c) 1980, 1993
  10  *      The Regents of the University of California.  All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36 #ifndef n_CONFIG_H
  37 # define n_CONFIG_H
  38
  39 #define ACCOUNT_NULL "null"   /* Name of "null" account */
  40 #define APPEND                /* New mail goes to end of mailbox */
  41 #define DOTLOCK_TRIES 5       /* Number of open(2) calls for dotlock */
  42 #define FILE_LOCK_TRIES 10    /* Maximum tries before n_file_lock() fails */
  43 #define FILE_LOCK_MILLIS 200  /* If UIZ_MAX, fall back to that */
  44 #define n_ERROR "ERROR"       /* Is-error?  Also as n_error[] */
  45 #define ERRORS_MAX 1000       /* Maximum error ring entries TODO configable*/
  46 #define n_ESCAPE "~"          /* Default escape for sending (POSIX) */
  47 #define FTMP_OPEN_TRIES 10    /* Maximum number of Ftmp() open(2) tries */
  48 #define HSHSIZE 23            /* Hash prime TODO make dynamic, obsolete */
  49 #define n_IMAP_DELIM "/."     /* Directory separator ([0] == replacer, too) */
  50 #define INDENT_DEFAULT "\t"   /* *indentprefix* default as of POSIX */
  51 #define n_MAILDIR_SEPARATOR ':' /* Flag separator character */
  52 #define n_MAXARGC 512         /* Maximum list of raw strings TODO dyn vector! */
  53 #define n_ALIAS_MAXEXP 25     /* Maximum expansion of aliases */
  54 #define n_PATH_DEVNULL "/dev/null"  /* Note: manual uses /dev/null as such */
  55 #define REFERENCES_MAX 20     /* Maximum entries in References: */
  56 #define n_SIGSUSPEND_NOT_WAITPID 1 /* Not waitpid(2), but sigsuspend(2) */
  57 #define n_UNIREPL "\xEF\xBF\xBD" /* Unicode replacement 0xFFFD in UTF-8 */
  58 #define n_VEXPR_REGEX_MAX 16  /* Maximum address. `vexpr' regex(7) matches */
  59
  60 /* Auto-reclaimed memory storage: size of the buffers.  Maximum auto-reclaimed
  61  * storage is that value /2, which is n_CTA()ed to be > 1024 */
  62 #define n_MEMORY_AUTOREC_SIZE 0x2000u
  63 /* Ugly, but avoid dynamic allocation for the management structure! */
  64 #define n_MEMORY_POOL_TYPE_SIZEOF (7 * sizeof(void*))
  65
  66 /* Default *mime-encoding* as enum mime_enc */
  67 #define MIME_DEFAULT_ENCODING MIMEE_8B
  68
  69 /* Maximum allowed line length in a mail before QP folding is necessary), and
  70  * the real limit we go for */
  71 #define MIME_LINELEN_MAX 998 /* Plus CRLF */
  72 #define MIME_LINELEN_LIMIT (MIME_LINELEN_MAX - 48)
  73
  74 /* Ditto, SHOULD */
  75 #define MIME_LINELEN 78 /* Plus CRLF */
  76
  77 /* And in headers which contain an encoded word according to RFC 2047 there is
  78  * yet another limit; also RFC 2045: 6.7, (5). */
  79 #define MIME_LINELEN_RFC2047 76
  80
  81 /* Fallback MIME charsets, if *charset-7bit* and *charset-8bit* are not set.
  82  * Note: must be lowercase!
  83  * (Keep in SYNC: ./nail.1:"Character sets", ./config.h:CHARSET_*!) */
  84 #define CHARSET_7BIT "us-ascii"
  85 #ifdef HAVE_ICONV
  86 # define CHARSET_8BIT "utf-8"
  87 # define CHARSET_8BIT_OKEY charset_8bit
  88 #else
  89 # define CHARSET_8BIT "iso-8859-1"
  90 # define CHARSET_8BIT_OKEY ttycharset
  91 #endif
  92
  93 /* Simply use RAND_bytes(3) for randoms */
  94 #ifdef HAVE_XSSL
  95 # define n_RANDOM_USE_XSSL 1
  96 #else
  97 # define n_RANDOM_USE_XSSL 0
  98 #endif
  99
 100 /* Some environment variables for pipe hooks etc. */
 101 #define n_PIPEENV_FILENAME "MAILX_FILENAME"
 102 #define n_PIPEENV_FILENAME_GENERATED "MAILX_FILENAME_GENERATED"
 103 #define n_PIPEENV_FILENAME_TEMPORARY "MAILX_FILENAME_TEMPORARY"
 104 #define n_PIPEENV_CONTENT "MAILX_CONTENT"
 105 #define n_PIPEENV_CONTENT_EVIDENCE "MAILX_CONTENT_EVIDENCE"
 106 #define n_PIPEENV_EXTERNAL_BODY_URL "MAILX_EXTERNAL_BODY_URL"
 107
 108 /* Is *W* a quoting (ASCII only) character? */
 109 #define n_QUOTE_IS_A(W) \
 110    ((W) == n_WC_C('>') || (W) == n_WC_C('|') ||\
 111     (W) == n_WC_C('}') || (W) == n_WC_C(':'))
 112
 113 /* Maximum number of quote characters (not bytes!) that'll be used on
 114  * follow lines when compressing leading quote characters */
 115 #define n_QUOTE_MAX 42u
 116
 117 /* How much spaces should a <tab> count when *quote-fold*ing? (power-of-two!) */
 118 #define n_QUOTE_TAB_SPACES 8
 119
 120 /* For long iterative output, like `list', tabulator-completion, etc.,
 121  * determine the screen width that should be used */
 122 #define n_SCRNWIDTH_FOR_LISTS ((size_t)n_scrnwidth - ((size_t)n_scrnwidth >> 3))
 123
 124 /* Smells fishy after, or asks for shell expansion, dependent on context */
 125 #define n_SHEXP_MAGIC_PATH_CHARS "|&;<>{}()[]*?$`'\"\\"
 126
 127 /* Maximum size of a message that is passed through to the spam system */
 128 #define SPAM_MAXSIZE 420000
 129
 130 /* Max readable line width TODO simply use BUFSIZ? */
 131 #if BUFSIZ + 0 > 2560
 132 # define LINESIZE BUFSIZ
 133 #else
 134 # define LINESIZE 2560
 135 #endif
 136 #define BUFFER_SIZE (BUFSIZ >= (1u << 13) ? BUFSIZ : (1u << 14))
 137
 138 /* TODO PATH_MAX: fixed-size buffer is always wrong (think NFS) */
 139 #ifndef PATH_MAX
 140 # ifdef MAXPATHLEN
 141 #  define PATH_MAX MAXPATHLEN
 142 # else
 143 #  define PATH_MAX 1024 /* _XOPEN_PATH_MAX POSIX 2008/Cor 1-2013 */
 144 # endif
 145 #endif
 146
 147 #ifndef HOST_NAME_MAX
 148 # ifdef _POSIX_HOST_NAME_MAX
 149 #  define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
 150 # else
 151 #  define HOST_NAME_MAX 255
 152 # endif
 153 #endif
 154
 155 #ifndef NAME_MAX
 156 # ifdef _POSIX_NAME_MAX
 157 #  define NAME_MAX _POSIX_NAME_MAX
 158 # else
 159 #  define NAME_MAX 14
 160 # endif
 161 #endif
 162 #if NAME_MAX + 0 < 8
 163 # error NAME_MAX is too small
 164 #endif
 165
 166 #ifndef STDIN_FILENO
 167 # define STDIN_FILENO 0
 168 #endif
 169 #ifndef STDOUT_FILENO
 170 # define STDOUT_FILENO 1
 171 #endif
 172 #ifndef STDERR_FILENO
 173 # define STDERR_FILENO 2
 174 #endif
 175
 176 #ifdef O_CLOEXEC
 177 # define _O_CLOEXEC O_CLOEXEC
 178 # define _CLOEXEC_SET(FD) do {;} while(0)
 179 #else
 180 # define _O_CLOEXEC 0
 181 # define _CLOEXEC_SET(FD) n_fd_cloexec_set(FD)
 182 #endif
 183
 184 #ifdef O_NOCTTY
 185 # define n_O_NOCTTY O_NOCTTY
 186 #else
 187 # define n_O_NOCTTY 0
 188 #endif
 189 #ifdef O_NOFOLLOW
 190 # define n_O_NOFOLLOW O_NOFOLLOW
 191 #else
 192 # define n_O_NOFOLLOW 0
 193 #endif
 194 #define n_O_NOXY_BITS (n_O_NOCTTY | n_O_NOFOLLOW)
 195
 196 #ifdef NSIG_MAX
 197 # undef NSIG
 198 # define NSIG NSIG_MAX
 199 #elif !defined NSIG
 200 # define NSIG ((sizeof(sigset_t) * 8) - 1)
 201 #endif
 202
 203 /* Switch indicating necessity of terminal access interface (termcap.c) */
 204 #if defined HAVE_TERMCAP || defined HAVE_COLOUR || defined HAVE_MLE
 205 # define n_HAVE_TCAP
 206 #endif
 207
 208 /* Whether we shall do our memory debug thing */
 209 #if (defined HAVE_DEBUG || defined HAVE_DEVEL) && !defined HAVE_NOMEMDBG
 210 # define HAVE_MEMORY_DEBUG
 211 #endif
 212
 213 /* Number of Not-Yet-Dead calls that are remembered */
 214 #if defined HAVE_DEBUG || defined HAVE_DEVEL || defined HAVE_NYD2
 215 # ifdef HAVE_NYD2
 216 #  define NYD_CALLS_MAX (25 * 84)
 217 # elif defined HAVE_DEVEL
 218 #  define NYD_CALLS_MAX (25 * 42)
 219 # else
 220 #  define NYD_CALLS_MAX (25 * 10)
 221 # endif
 222 #endif
 223
 224 #endif /* n_CONFIG_H */
 225 /* s-it-mode */