fmttest (1) - Linux Manuals


fmttest - test tool for the mh-format(5) language


fmttest [-form formatfile] [-format formatstring] [-address | -raw | -date | -message] [-file | -nofile] [--component component-text] [-dupaddrs | -nodupaddrs] [-ccme | -noccme] [-outsize size-in-characters] [-bufsize size-in-bytes] [-width column-width] [-msgnum number] [-msgcur flag] [-msgsize size] [-unseen flag] [-dump | -nodump] [-trace | -notrace] [+folder] [msgs | strings]


is used to test programs written for the nmh format language as specified by mh-format(5). It is also intended to replace the ap, dp, and fmtdump programs.


The -format string and -form formatfile switches may be used to specify a format string or a format file to read. If given a format string, it must be specified as a single argument to the -format switch. If given a format file name with -form, the file is searched for using the normal nmh rules: absolute pathnames are accessed directly, tilde expansion is done on usernames, and files are searched for in the user's Mail directory as specified in their profile. If not found there, the directory ``/etc/nmh'' is checked.


Fmttest has four operating modes: address mode, raw mode, date mode, and message mode. These modes are selected by the -address, -raw, -date, and -message switches respectively.

Address mode treats every argument as an email address and processes it with nmh's email parser. Each argument is processed with the specified format program with the parsed email address available as a special %{text} component escape, and the output from the program is printed on standard output. If there was an error parsing the email address the error message is stored in the %{error} component escape. If no format program is given on the command line, the following default program is used:

%<{error}%{error}: %{text}%|%(putstr(proper{text}))%>

In this mode fmttest is equivalent to ap(8).

In raw mode, no processing of the specified arguments is done. Each argument is run against the specified format program with the argument text available in the %{text} component. You must specify a format with -form or -format when using raw mode.

Date mode is identical to raw mode, with one exception: if no format is specified, the following format string is used:

%<(nodate{text})error: %{text}%|%(putstr(pretty{text}))%>

Date mode is equivalent to dp(8).

In message mode the arguments to fmttest are interpreted as an optional folder and messages. Fmttest will read each specified message and make all of the components in the message available to the format program. Also, the appropriate information for the %(msg), %(cur), %(unseen), and %(size) function escapes will be made available for each message. If the -file switch is given, the arguments are interpreted as filenames instead of message numbers, but otherwise the behavior is the same (except that the %(msg), %(cur), and %(unseen) function escapes will not provide any useful information).

The default format used in address mode is the default format used by scan. The following command can replicate the functionality of the repl command.

fmttest -nodupaddrs -form replcomps -outsize max [+folder] message

Regardless of the mode, other components can be provided to the format program by the use of the --component switch. For example, the following program will test out the use of the ``encrypted'' component:

fmttest --encrypted yes -message cur

In message mode components supplied on the command line will override components from messages.


The -dupaddrs and -nodupaddrs switches control whether duplicate addresses are allowed or suppressed by the FORMATADDR instruction, which is used by the `%(formataddr)' function escape. In normal operation duplicate addresses are only suppressed by repl.

The -ccme and -noccme switches control whether or not to count the user's local mailbox as a duplicate address. This replicates the behavior of the -cc me switch to repl, and only applies if -nodupaddrs is in effect.

The -outsize switch controls the maximum number of printable characters that the format engine will produce. Characters marked as non-printing by the format engine with `%(zputlit)', characters with zero width, and extra bytes that are part of a multibyte character are not counted against this total. Two special values are supported: ``max'', which will set the value to the size of the output buffer, and ``width'', which will set the value to the width of the terminal. In message mode it defaults to the terminal width, otherwise the default is the output buffer size.

The -bufsize switch controls the size of the output buffer. By default it is set to the size of the BUFSIZ C preprocessor symbol, which is system-dependent.

The -width switch controls the column width which is used by the `%(width)' function escape. By default is set to the terminal width.

The -msgnum, -msgcur, -msgsize, and the -unseen switches all control the values used, respectively, by the following function escapes: `%(num)', `%(cur)', `%(size)', and `%(unseen)'. If none are supplied these values are taken from the message in message mode; in all other modes the default values are 0.


The -dump switch outputs the complete set of format instructions for the specified format program. The -trace switch will output each format instruction as it is being executed, and show the values of the num and str registers if they have changed from the previous instruction. The output buffer is also printed if it has changed from the previous instruction.


It should be noted that there is not a one-to-one correspondence between format escapes and format instructions; many instructions have side effects. Instructions prefixed with ``LV'' generally return a integer into the num (value) register; instructions prefixed with a ``LS'' return a string into the str register.

Instruction  Description
COMP          Output component
COMPF         Formatted output component
LIT           Output literal text
LITF          Formatted literal text output
CHAR          Output single character
NUM           Output the num register
NUMF          Formatted output of the num register
STR           Output the str register
STRF          Formatted output of the str register
STRFW         Not used
PUTADDR       Output address list in str register
STRLIT        Output str, no space compression
STRLITZ       Like STRLIT, but not counted against width
LS_COMP       Write component to str register
LS_LIT        Write literal to str register
LS_GETENV     Write environment var to str register
LS_DECODECOMP Decode RFC 2047 encoded component to str register
LS_DECODE     Decode RFC 2047 encoded string to str register
LS_TRIM       Trim trailing whitespace from str register
LV_COMP       Convert component to integer, store in num register
LV_COMPFLAG   Set num to 1 if TRUE set in component
LV_LIT        Load literal value into num register
LV_DAT        Load value from dat array into num register (see note)
LV_STRLEN     Set num to the length of str
LV_PLUS_L     Add value to num register
LV_MINUS_L    Substract value from num register
LV_DIVIDE_L   Divide num register by value
LV_MODULO_L   num modulo value
LV_CHAR_LEFT  Store remaining number of printable chars in num
LS_MONTH      Write short name of month to str from date component
LS_LMONTH     Write long name of month to str from date component
LS_ZONE       Write time zone offset to str from date component
LS_DAY        Write short name of day of week to str from date component
LS_WEEKDAY    Write long name of day of week to str from date component
LS_822DATE    Write RFC 822 compatible date to str from date component
LS_PRETTY     Write date with ``pretty'' timezone to str
LV_SEC        Write date component seconds to num
LV_MIN        Write date component minutes to num
LV_HOUR       Write date component hour to num
LV_MON        Write date component numeric month to num (start at 1)
LV_YEAR       Write date component year to num
LV_YDAY       Write date component Julian day to num
LV_WDAY       Write date component day of week to num (0 == Sunday)
LV_ZONE       Write date component time zone offset to num
LV_CLOCK      Write date component in Unix epoch time to num
LV_RCLOCK     Write offset of date component from current time to num
LV_DAYF       Write 1 to num if day of week is explicit
LV_DST        Write 1 to num if DST is in effect for date component
LV_ZONEF      Write 1 to num if timezone is explicit
LS_ADDR       Write email address of addr component to str
LS_PERS       Write personal name of addr component to str
LS_MBOX       Write mailbox (username) of addr component to str
LS_HOST       Write host of addr component to str
LS_PATH       Write host route of addr component to str
LS_GNAME      Write group name of addr component to str
LS_NOTE       Write note portion of addr component to str
LS_822ADDR    Write ``proper'' RFC 822 version of addr component to str
LS_FRIENDLY   Write friendly (name or note) of address component to str
LS_UNQUOTE    Remove RFC 2822 quotes from string
LV_HOSTTYPE   Set num to type of host (0=local, 1=network)
LV_INGRPF     Set num to 1 if address was inside of group
LV_NOHOSTF    Set num to 1 of no host was present in address component
LOCALDATE     Convert date component to local timezone
GMTDATE       Convert date component to GMT
PARSEDATE     Parse date component
PARSEADDR     Parse address component
FORMATADDR    Add address component to list in str
CONCATADDR    Like FORMATADDR, but will not suppress duplicates
MYMBOX        Set num if address component is a local address
SAVESTR       Save str register temporarily
DONE          End program
NOP           No operation
GOTO          Jump to new instruction
IF_S_NULL     Branch if str is NULL
IF_S          Branch if str is not NULL
IF_V_EQ       Branch if num is equal to value
IF_V_NE       Branch if num is not equal to value
IF_V_GT       Branch if num is greater than value
IF_MATCH      Branch if str contains string
IF_AMATCH     Branch if str starts with string
S_NULL        Set num to 1 if str is NULL
S_NONNULL     Set num to 1 if str is not NULL
V_EQ          Set num to 1 if num equals value
V_NE          Set num to 1 if num does not equal value
V_GT          Set num to 1 if num is greater than value
V_MATCH       Set num to 1 if str contains string
V_AMATCH      Set num to 1 if str starts with string

The LV_DAT instruction is a bit special. Callers of the format library pass in an array of integers that are used by certain format escapes. The current list of format escapes and the indexes they use are:

dat[0]  %(num)
dat[1]  %(cur)
dat[2]  %(size)
dat[3]  %(width)
dat[4]  %(unseen)




It shouldn't require as much code from other programs as it does.


mh-format(5), repl(1), ap(8), dp(8),