http://invisible-island.net/ncurses/tctest/
tctest - termcap library checker
tctest [options] [file-specifications]
tctest exercises the termcap library (or emulation of termcap) with
which it is linked. It provides several command-line options, making
it simple to construct test-cases to compare implementations of term-
cap.
After processing options, tctest uses any command-line parameters as
the names of terminal descriptions to process. If no command-line
parameters are given, tctest tries the TERM environment variable. If
that is not set, the program uses the dumb terminal description.
The termcap library function tgetent locates the termcap file, looking
at the TERMCAP environment variable (or /etc/termcap). tctest manipu-
lates this environment variable, allowing one to use alternate terminal
databases.
Some of the options provide only summary behavior. The most useful
output from tctest is in termcap format, with one capability per line.
It is noted that the extra whitespace would be poorly handled by some
termcap implementations, counting toward the 1023 byte limit on an
entry's size. The reason for listing it in this way is to provide easy
comparison.
These are the options:
-1 when processing a termcap file, e.g., with -a, call tgetent only
once per entry using the primary name. Use this for getting
per-entry statistics versus the per-call statistics.
-a show capabilities for all names in termcap file. This overrides
the -b option.
-b use brute-force to find all capabilities, e.g., for the names
given on the command-line.
-c tctest uses the names from a built-in table of termcap names
chosen to correspond to terminfo capability names. This is the
default; the -c option is provided to cancel -b.
-e use $TERMCAP variable if it exists. If this option is not set,
tctest unsets the TERMCAP environment variable.
-f NAME
use this termcap file. tctest sets the TERMCAP environment
variable to the file's absolute path.
-g writes two files (by-name.dat and by-size.dat) with statistics
gathered while processing other options, e.g., -a or -s):
by-name.dat columns
1 the 2-character capability name in double-quotes
2 total number of times the capability was retrieved
3 number denoting if the value is "standard" (1) or
"obsolete" (3).
by-size.dat columns
1 size of the buffer returned by tgetent
2 total number of tgetent calls returning this size
3 total wasted space (tabs, newlines) for tgetent calls
returning this size
-l list names and aliases in termcap file.
-n do not query for the capability names. This option is used to
allow timing "only" tgetent.
-o NAME
redirect output (the reformatted input) to this file. By
default that goes to the standard output. If this option is
used, verbose and summary reports are written to the standard
output instead of the standard error, to allow separating them
from error messages that may be written by the termcap library.
-r COUNT
repeat the processing of the terminal database this many times.
As in -n, this is used to help measure timing for tgetent.
-s show a summary report.
-v verbose (prints names to stderr to track tgetent calls). This
is useful in conjunction with -a, e.g., to help pinpoint places
where tgetent reports that a terminal entry is too large.
Repeat the option to get more detail.
-w check the result from tgetent and tgetstr, printing warnings to
the standard error.
-V print the program version and exit
tgetent(3) documentation for ncurses highlights the differences. This
is a starting point; although the original BSD source code is recom-
mended reading as well.
ncurses(3) is a terminfo-based library, which provides a termcap inter-
face. Normally it ignores the TERMCAP variable, but it can be config-
ured to provide a more accurate emulation of the termcap library, e.g.,
loading the terminal entries base on TERMCAP.
Thomas Dickey <dickey@invisible-island.net>.
TCTEST(1)