Mercurial > hg > toybox
view toys/posix/sleep.c @ 1531:3ff823086c99 draft
Teach ln -f to leave original target alone if link creation fails.
Suggested by Ashwini Sharma, I wound up implementing it by creating the new
link at a temporary name and renaming it over the old one instead of renaming
the old file out of the way and putting it back if it failed.
(Because "mkdir -p one/one/blah && ln -sf /bin/one one" would otherwise
rename one/one out of the way and only notice it can't delete it way at the
end when recovery's darn awkward, vs create new thing and if rename fails
(including EISDIR) that's the main error path. And yes the temporary name
is in the same directory as the destination so we never rename between mounts.)
link over the old one instead of renaming the old file and renaming it back.
| author | Rob Landley <rob@landley.net> |
|---|---|
| date | Wed, 22 Oct 2014 17:11:06 -0500 |
| parents | ce0519f6457c |
| children |
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/* sleep.c - Wait for a number of seconds. * * Copyright 2007 Rob Landley <rob@landley.net> * Copyright 2012 Georgi Chorbadzhiyski <georgi@unixsol.org> * * See http://opengroup.org/onlinepubs/9699919799/utilities/sleep.html USE_SLEEP(NEWTOY(sleep, "<1", TOYFLAG_BIN)) config SLEEP bool "sleep" default y help usage: sleep LENGTH Wait before exiting. An optional suffix can be "m" (minutes), "h" (hours), "d" (days), or "s" (seconds, the default). config SLEEP_FLOAT bool default y depends on SLEEP && TOYBOX_FLOAT help Length can be a decimal fraction. */ #include "toys.h" void sleep_main(void) { struct timespec tv; tv.tv_sec = xparsetime(*toys.optargs, 1000000000, &tv.tv_nsec); toys.exitval = !!nanosleep(&tv, NULL); }