Bourne
| Ash
| #!
| find
| ARG_MAX
| Shells
| whatshell
| portability
| permissions
| UUOC
| ancient
| -
| Various
| HOME
"$@"
| echo/printf
| set -e
| test
| tty defs
| tty chars
| $() vs )
| IFS
| using siginfo
| nanosleep
| line charset
| locale
All the arbitrary stuff, in detail, parts of it just for my own fun, parts may be of general interest.
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The traditional Bourne shell family.
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The Almquist shell family.
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About the #! mechanism (aka "shebang"),
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details for various unix flavours.
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Some notes about
find(1) -
(not descending into directories, about xargs(1), pattern matching,
"-print", "-ls", and more)
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About ARG_MAX, the maximum length
of arguments for a process.
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- System shells on various Unix flavours.
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- What does
${1+"$@"} mean? -
and where it is necessary.
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Some pointers about portable shell programming.
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Special usage of permission bits
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that is, set uid, set gid, and the sticky bit
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Useful use of cat(1)
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contrasting the "useless use of cat award"
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Some ancient Unix variants running in simh and qemu
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with example session logs
- Behaviour of echo and printf implementations,
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availability, portability, some details about escape sequences
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Some current and historical TTY defaults.
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You are used to "stty intr" being <CTRL-C> and alike?
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What happens when typing control characters in a
tty/pty, like
ctrl-h, ctrl-[, etc? -
(actually, you're producing the nonprintable "ASCII" characters this way.)
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"
$()" command substitution vs.
embedded ")" and quotes -
Some parser stumble here
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IFS handling in various shells -
concerning the special variables
$* and $@
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A glance at the three universes in SINIX V5.2.
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X11 User-low-level configuration.
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X11- and XTerm resources, libXt translations, xmodmap(1), xev(1),
using special/8bit characters.
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The 'Alternate Linedrawing Charset',
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on the occasion of a Usenet discussion. An illustration:
vs.
.
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about nanosleep() - weird behaviour on some Linux:
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nanosleep returns with EINTR on SIGSTOP/SIGCONT
and this even affects sleep(1) when using
<ctrl-z>
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using siginfo(5) - on SVR4 related Unix flavours,
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to find the sender of a signal.
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w3m, links, lynx, xemacs-w3
- Some screenshots (each about 10-20 kB).
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You're browsing with a GUI now and always wanted to know how
informative and useful text browsers can look like?
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creating HTML screenshots of Thomas Dickey's xterm
- including font attributes,
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a converter script, which handles colors, bold, underlined and
(if you like it illegal) most of the alternate linedrawing character set.
2009-06-01