diff options
Diffstat (limited to 'tools/pipette.c')
| -rw-r--r-- | tools/pipette.c | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/tools/pipette.c b/tools/pipette.c index c76b9e5..69e75be 100644 --- a/tools/pipette.c +++ b/tools/pipette.c @@ -94,26 +94,26 @@ typedef enum {MSG, ENV} channeler; /* Notation for future use: - 0< &kb 1> &scr 2> &scr prog1 # stand-alone - 0< &kb 1> &redpipe 2> &scr prog2 # upstream end of pipe - 0< &redpipe 1> &scr 2> &scr prog3 # downstream end of pipe + 0< kb 1> scr 2> scr prog1 # stand-alone + 0< kb 1> pipe 2> scr prog2 # upstream end of pipe + 0< pipe 1> scr 2> scr prog3 # downstream end of pipe - 0< &msg 1< &envelope 2> &log qmail-queue + 0< msg 1< envel 2> log qmail-queue - 0< &kb 1> &scr 2> &scr 7> &up 8< &down parent - 0< &up 1> &down 2> &scr childprocess + 0< kb 1> scr 2> scr 7> up 8< down parent + 0< up 1> down 2> scr childprocess Simple case: - 0< &msg 1> &msg2 2> &log skrewt - 0< &msg2 1> &msg3 2> &log spamc - 0< &msg3 1< &envelope 2> &log qmail-queue + 0< msg 1> msg2 2> log skrewt + 0< msg2 1> msg3 2> log spamc + 0< msg3 1< envel 2> log qmail-queue Fancier "triangular piping" case: - 0< &msg 1< &env 2> &log 7> &msg2 8> &env2 skrewt - 0< &msg2 1> &msg3 2> &log spamc - 0< &msg3 1< &env2 2> &log qmail-queue + 0< msg 1< env 2> log 6> msg2 7< sts 8> env2 skrewt + 0< msg2 1> msg3 2> log 8> sts spamc + 0< msg3 1< env2 2> log qmail-queue -Note that units 7 and 8 are arbitrary and could be renumbered. In +Note that units 6, 7, and 8 are arbitrary and could be renumbered. In contrast, many of the other are fixed by standards and/or traditions. Some questions: @@ -126,6 +126,8 @@ Similarly, now hard is it to detect a /broken/ pipe segment, i.e. one where all the reading ends have been closed? This means the writing ends can be closed, freeing up FD units. +See also notes in ./makefile + */ typedef enum {series, stub, sa, qq, postspam, fail} moder; |