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) 2012 - 2018 Steffen (Daode) Nurpmeso <steffen@sdaoden.eu>.
   6  * SPDX-License-Identifier: ISC
   7  *
   8  * Permission to use, copy, modify, and/or distribute this software for any
   9  * purpose with or without fee is hereby granted, provided that the above
  10  * copyright notice and this permission notice appear in all copies.
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  13  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  14  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  15  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  16  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  17  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  18  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  19  */
  20 #ifndef n_CONFIG_H
  21 # define n_CONFIG_H
  22
  23 #define ACCOUNT_NULL "null"   /* Name of "null" account */
  24 /* Protocol version for *on-compose-splice** -- update manual on change! */
  25 #define n_DIG_MSG_PLUMBING_VERSION "0 0 1"
  26 #define DOTLOCK_TRIES 5       /* Number of open(2) calls for dotlock */
  27 #define FILE_LOCK_TRIES 10    /* Maximum tries before n_file_lock() fails */
  28 #define FILE_LOCK_MILLIS 200  /* If UIZ_MAX, fall back to that */
  29 #define n_ERROR "ERROR"       /* Is-error?  Also as n_error[] */
  30 #define ERRORS_MAX 1000       /* Maximum error ring entries TODO configable*/
  31 #define n_ESCAPE "~"          /* Default escape for sending (POSIX) */
  32 #define FTMP_OPEN_TRIES 10    /* Maximum number of Ftmp() open(2) tries */
  33 #define n_FORWARD_INJECT_HEAD "-------- Original Message --------\n" /* DOC! */
  34 #define n_FORWARD_INJECT_TAIL NULL /* DOC! */
  35 #define HSHSIZE 23            /* Hash prime TODO make dynamic, obsolete */
  36 #define n_IMAP_DELIM "/."     /* Directory separator ([0] == replacer, too) */
  37 #define n_MAILDIR_SEPARATOR ':' /* Flag separator character */
  38 #define n_MAXARGC 512         /* Maximum list of raw strings TODO dyn vector! */
  39 #define n_ALIAS_MAXEXP 25     /* Maximum expansion of aliases */
  40 #define n_PATH_DEVNULL "/dev/null"  /* Note: manual uses /dev/null as such */
  41 #define n_QUOTE_INJECT_HEAD "%f wrote:\n\n" /* DOC! */
  42 #define n_QUOTE_INJECT_TAIL NULL /* DOC! */
  43 #define REFERENCES_MAX 20     /* Maximum entries in References: */
  44 #define n_SIGSUSPEND_NOT_WAITPID 1 /* Not waitpid(2), but sigsuspend(2) */
  45 #define n_UNIREPL "\xEF\xBF\xBD" /* Unicode replacement 0xFFFD in UTF-8 */
  46 #define n_VEXPR_REGEX_MAX 16  /* Maximum address. `vexpr' regex(7) matches */
  47
  48 /* * */
  49
  50 /* Fallback MIME charsets, if *charset-7bit* and *charset-8bit* are not set.
  51  * Note: must be lowercase!
  52  * (Keep in SYNC: ./nail.1:"Character sets", ./config.h:CHARSET_*!) */
  53 #define CHARSET_7BIT "us-ascii"
  54 #ifdef HAVE_ICONV
  55 # define CHARSET_8BIT "utf-8"
  56 # define CHARSET_8BIT_OKEY charset_8bit
  57 #else
  58 # if defined HAVE_ALWAYS_UNICODE_LOCALE
  59 #  define CHARSET_8BIT "utf-8"
  60 # else
  61 #  define CHARSET_8BIT "iso-8859-1"
  62 # endif
  63 # define CHARSET_8BIT_OKEY ttycharset
  64 #endif
  65
  66 #ifndef HOST_NAME_MAX
  67 # ifdef _POSIX_HOST_NAME_MAX
  68 #  define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
  69 # else
  70 #  define HOST_NAME_MAX 255
  71 # endif
  72 #endif
  73
  74 /* Supported IDNA implementations */
  75 #define n_IDNA_IMPL_LIBIDN2 0
  76 #define n_IDNA_IMPL_LIBIDN 1
  77 #define n_IDNA_IMPL_IDNKIT 2 /* 1 + 2 */
  78
  79 /* Max readable line width TODO simply use BUFSIZ? */
  80 #if BUFSIZ + 0 > 2560
  81 # define LINESIZE BUFSIZ
  82 #else
  83 # define LINESIZE 2560
  84 #endif
  85 #define BUFFER_SIZE (BUFSIZ >= (1u << 13) ? BUFSIZ : (1u << 14))
  86
  87 /* Auto-reclaimed memory storage: size of the buffers.  Maximum auto-reclaimed
  88  * storage is that value /2, which is n_CTA()ed to be > 1024 */
  89 #define n_MEMORY_AUTOREC_SIZE 0x2000u
  90 /* Ugly, but avoid dynamic allocation for the management structure! */
  91 #define n_MEMORY_POOL_TYPE_SIZEOF (8 * sizeof(void*))
  92
  93 /* Default *mime-encoding* as enum mime_enc */
  94 #define MIME_DEFAULT_ENCODING MIMEE_QP
  95
  96 /* Maximum allowed line length in a mail before QP folding is necessary), and
  97  * the real limit we go for */
  98 #define MIME_LINELEN_MAX 998 /* Plus CRLF */
  99 #define MIME_LINELEN_LIMIT (MIME_LINELEN_MAX - 48)
 100
 101 /* Ditto, SHOULD */
 102 #define MIME_LINELEN 78 /* Plus CRLF */
 103
 104 /* And in headers which contain an encoded word according to RFC 2047 there is
 105  * yet another limit; also RFC 2045: 6.7, (5). */
 106 #define MIME_LINELEN_RFC2047 76
 107
 108 /* TODO PATH_MAX: fixed-size buffer is always wrong (think NFS) */
 109 #ifndef PATH_MAX
 110 # ifdef MAXPATHLEN
 111 #  define PATH_MAX MAXPATHLEN
 112 # else
 113 #  define PATH_MAX 1024 /* _XOPEN_PATH_MAX POSIX 2008/Cor 1-2013 */
 114 # endif
 115 #endif
 116
 117 /* Some environment variables for pipe hooks etc. */
 118 #define n_PIPEENV_FILENAME "MAILX_FILENAME"
 119 #define n_PIPEENV_FILENAME_GENERATED "MAILX_FILENAME_GENERATED"
 120 #define n_PIPEENV_FILENAME_TEMPORARY "MAILX_FILENAME_TEMPORARY"
 121 #define n_PIPEENV_CONTENT "MAILX_CONTENT"
 122 #define n_PIPEENV_CONTENT_EVIDENCE "MAILX_CONTENT_EVIDENCE"
 123 #define n_PIPEENV_EXTERNAL_BODY_URL "MAILX_EXTERNAL_BODY_URL"
 124
 125 /* Maximum number of quote characters (not bytes!) that'll be used on
 126  * follow lines when compressing leading quote characters */
 127 #define n_QUOTE_MAX 42u
 128
 129 /* How much spaces should a <tab> count when *quote-fold*ing? (power-of-two!) */
 130 #define n_QUOTE_TAB_SPACES 8
 131
 132 /* Supported (external) PRG implementations */
 133 #define n_RANDOM_IMPL_BUILTIN 0
 134 #define n_RANDOM_IMPL_ARC4 1
 135 #define n_RANDOM_IMPL_TLS 2
 136 #define n_RANDOM_IMPL_GETRANDOM 3 /* (both, syscall + library) */
 137 #define n_RANDOM_IMPL_URANDOM 4
 138
 139 /* For long iterative output, like `list', tabulator-completion, etc.,
 140  * determine the screen width that should be used */
 141 #define n_SCRNWIDTH_FOR_LISTS ((size_t)n_scrnwidth - ((size_t)n_scrnwidth >> 3))
 142
 143 /* Smells fishy after, or asks for shell expansion, dependent on context */
 144 #define n_SHEXP_MAGIC_PATH_CHARS "|&;<>{}()[]*?$`'\"\\"
 145
 146 /* Port to native MS-Windows and to ancient UNIX */
 147 #if !defined S_ISDIR && defined S_IFDIR && defined S_IFMT
 148 # define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
 149 #endif
 150
 151 /* Maximum size of a message that is passed through to the spam system */
 152 #define SPAM_MAXSIZE 420000
 153
 154 #ifndef NAME_MAX
 155 # ifdef _POSIX_NAME_MAX
 156 #  define NAME_MAX _POSIX_NAME_MAX
 157 # else
 158 #  define NAME_MAX 14
 159 # endif
 160 #endif
 161 #if NAME_MAX + 0 < 8
 162 # error NAME_MAX is too small
 163 #endif
 164
 165 #ifndef STDIN_FILENO
 166 # define STDIN_FILENO 0
 167 #endif
 168 #ifndef STDOUT_FILENO
 169 # define STDOUT_FILENO 1
 170 #endif
 171 #ifndef STDERR_FILENO
 172 # define STDERR_FILENO 2
 173 #endif
 174
 175 #ifdef O_CLOEXEC
 176 # define _O_CLOEXEC O_CLOEXEC
 177 # define _CLOEXEC_SET(FD) do {;} while(0)
 178 #else
 179 # define _O_CLOEXEC 0
 180 # define _CLOEXEC_SET(FD) n_fd_cloexec_set(FD)
 181 #endif
 182
 183 #ifdef O_NOCTTY
 184 # define n_O_NOCTTY O_NOCTTY
 185 #else
 186 # define n_O_NOCTTY 0
 187 #endif
 188 #ifdef O_NOFOLLOW
 189 # define n_O_NOFOLLOW O_NOFOLLOW
 190 #else
 191 # define n_O_NOFOLLOW 0
 192 #endif
 193 #define n_O_NOXY_BITS (n_O_NOCTTY | n_O_NOFOLLOW)
 194
 195 #ifdef NSIG_MAX
 196 # undef NSIG
 197 # define NSIG NSIG_MAX
 198 #elif !defined NSIG
 199 # define NSIG ((sizeof(sigset_t) * 8) - 1)
 200 #endif
 201
 202 /* * */
 203
 204 /* Switch indicating necessity of terminal access interface (termcap.c) */
 205 #if defined HAVE_TERMCAP || defined HAVE_COLOUR || defined HAVE_MLE
 206 # define n_HAVE_TCAP
 207 #endif
 208
 209 /* Whether we shall do our memory debug thing */
 210 #if (defined HAVE_DEBUG || defined HAVE_DEVEL) && !defined HAVE_NOMEMDBG
 211 # define HAVE_MEMORY_DEBUG
 212 #endif
 213
 214 /* Number of Not-Yet-Dead calls that are remembered */
 215 #if defined HAVE_DEBUG || defined HAVE_DEVEL || defined HAVE_NYD2
 216 # ifdef HAVE_NYD2
 217 #  define NYD_CALLS_MAX (25 * 84)
 218 # elif defined HAVE_DEVEL
 219 #  define NYD_CALLS_MAX (25 * 42)
 220 # else
 221 #  define NYD_CALLS_MAX (25 * 10)
 222 # endif
 223 #endif
 224
 225 #endif /* n_CONFIG_H */
 226 /* s-it-mode */