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5dce9f443c
Removed trailing whitespace. * Makefile.am: Removed trailing white space. * NEWS, build-aux/check-testfiles.sh, build-aux/src-sniff.py, doc/Makefile.am, doc/find-maint.texi, doc/find.texi, find/Makefile.am, find/defs.h, find/find.1, find/find.c, find/finddata.c, find/fstype.c, find/ftsfind.c, find/parser.c, find/pred.c, find/tree.c, find/util.c, import-gnulib.sh, lib/Makefile.am, lib/buildcmd.c, lib/buildcmd.h, lib/dircallback.c, lib/dircallback.h, lib/extendbuf.c, lib/extendbuf.h, lib/findutils-version.c, lib/findutils-version.h, lib/forcefindlib.c, lib/gnulib-version.h, lib/listfile.c, lib/modetype.h, lib/nextelem.c, lib/nextelem.h, lib/printquoted.c, lib/printquoted.h, lib/qmark.c, lib/regexprops.c, lib/regextype.c, lib/savedirinfo.c, lib/savedirinfo.h, lib/strspn.c, lib/wait.h, lib/waitpid.c, locate/bigram.c, locate/code.c, locate/locate.1, locate/locate.c, locate/locatedb.5, locate/locatedb.h, locate/updatedb.1, locate/updatedb.sh, locate/word_io.c, m4/findlib.m4, m4/nullsort.m4, m4/withfts.m4, xargs/xargs.1: Likewise. Signed-off-by: James Youngman <jay@gnu.org>
79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
/* Emulate waitpid on systems that just have wait.
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Copyright 1994, 1995, 1998, 1999 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <errno.h>
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#ifndef errno
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extern int errno;
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#endif
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#if defined _MSC_VER || defined __MINGW32__
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/* Native Woe32 API. */
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#include <process.h>
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#else
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/* Unix API. */
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#include "wait.h"
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#endif
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#define WAITPID_CHILDREN 8
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static pid_t waited_pid[WAITPID_CHILDREN];
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static int waited_status[WAITPID_CHILDREN];
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pid_t
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waitpid (pid_t pid, int *stat_loc, int options)
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{
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int i;
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pid_t p;
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if (!options && (pid == -1 || 0 < pid))
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{
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/* If we have already waited for this child, return it immediately. */
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for (i = 0; i < WAITPID_CHILDREN; i++)
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{
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p = waited_pid[i];
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if (p && (p == pid || pid == -1))
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{
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waited_pid[i] = 0;
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goto success;
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}
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}
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/* The child has not returned yet; wait for it, accumulating status. */
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for (i = 0; i < WAITPID_CHILDREN; i++)
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if (! waited_pid[i])
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{
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p = wait (&waited_status[i]);
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if (p < 0)
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return p;
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if (p == pid || pid == -1)
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goto success;
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waited_pid[i] = p;
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}
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}
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/* We cannot emulate this wait call, e.g. because of too many children. */
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errno = EINVAL;
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return -1;
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success:
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if (stat_loc)
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*stat_loc = waited_status[i];
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return p;
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}
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