1 /* Provide a replacement for the POSIX nanosleep function.
2 Copyright (C) 1999 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
18 /* written by Jim Meyering */
22 #include <sys/types.h>
35 /* FIXME: is including both like this kosher? */
46 struct sigaction sigact;
48 sigact.sa_handler = SIG_DFL;
49 sigemptyset (&sigact.sa_mask);
51 sigaction (sig, &sigact, NULL);
53 signal (sig, SIG_DFL);
57 kill (getpid (), sig);
60 /* Sleep for USEC microseconds. */
63 my_usleep (const struct timespec *ts_delay)
65 struct timeval tv_delay;
66 tv_delay.tv_sec = ts_delay->tv_sec;
67 tv_delay.tv_usec = 1000 * ts_delay->tv_nsec;
68 select (0, (void *) 0, (void *) 0, (void *) 0, &tv_delay);
72 nanosleep (const struct timespec *requested_delay,
73 struct timespec *remaining_delay)
76 struct sigaction oldact, newact;
81 /* set up sig handler -- but maybe only do this the first time? */
83 newact.sa_handler = sighandler;
84 sigemptyset (&newact.sa_mask);
87 sigaction (SIGCONT, NULL, &oldact);
88 if (oldact.sa_handler != SIG_IGN)
89 sigaction (SIGCONT, &newact, NULL);
91 if (signal (SIGCONT, SIG_IGN) != SIG_IGN)
92 signal (SIGCONT, sighandler);
95 my_usleep (requested_delay);
99 /* Calculate time remaining. */
100 /* FIXME: the code in sleep doesn't use this, so there's no
101 rush to implement it. */
104 /* FIXME: Restore sig handler? */