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A capable MIME-email-handling system with a command-line interface


fmttest - test programs in nmh’s mh-format(5) language


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


fmttest 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.

Format Program Selection

The -format string and -form formatfile specify a format string or file to read. A format string, if given, must be a single argument to the -format switch. If a format file name is passed to the -form, switch, 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.

Mode Selection and Component Specification

fmttest has four operating modes - address, raw, date, and message - which are selected by the -address, -raw, -date, and -message switches, respectively.
Address mode treats every argument as an email address to be processed by nmh’s email parser using the specified format program. The parsed address is made 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}))%>
Address mode 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 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.

Additional Switches

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 means as many characters as the format engine can produce (limited by internal buffers), and “width”, which will set the value to the width of the terminal. In message mode it defaults to “width”, otherwise the default is “max”.
The -width switch controls the column width which is used by the ‘%(width)’ function escape. It defaults 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.

Compiling and Tracing Format Programs

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.

Format Instructions

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_DECODECOMPDecode 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   Subtract 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.
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