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5a82c74822
Also, change sources.redhat.com to sourceware.org. This patch was automatically generated by running the following shell script, which uses GNU sed, and which avoids modifying files imported from upstream: sed -ri ' s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g ' \ $(find $(git ls-files) -prune -type f \ ! -name '*.po' \ ! -name 'ChangeLog*' \ ! -path COPYING ! -path COPYING.LIB \ ! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \ ! -path manual/texinfo.tex ! -path scripts/config.guess \ ! -path scripts/config.sub ! -path scripts/install-sh \ ! -path scripts/mkinstalldirs ! -path scripts/move-if-change \ ! -path INSTALL ! -path locale/programs/charmap-kw.h \ ! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \ ! '(' -name configure \ -execdir test -f configure.ac -o -f configure.in ';' ')' \ ! '(' -name preconfigure \ -execdir test -f preconfigure.ac ';' ')' \ -print) and then by running 'make dist-prepare' to regenerate files built from the altered files, and then executing the following to cleanup: chmod a+x sysdeps/unix/sysv/linux/riscv/configure # Omit irrelevant whitespace and comment-only changes, # perhaps from a slightly-different Autoconf version. git checkout -f \ sysdeps/csky/configure \ sysdeps/hppa/configure \ sysdeps/riscv/configure \ sysdeps/unix/sysv/linux/csky/configure # Omit changes that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines git checkout -f \ sysdeps/powerpc/powerpc64/ppc-mcount.S \ sysdeps/unix/sysv/linux/s390/s390-64/syscall.S # Omit change that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
/* Using kill for Communication
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Copyright (C) 1991-2019 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (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 <https://www.gnu.org/licenses/>.
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*/
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/*@group*/
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#include <signal.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <unistd.h>
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/*@end group*/
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/* When a @code{SIGUSR1} signal arrives, set this variable. */
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volatile sig_atomic_t usr_interrupt = 0;
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void
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synch_signal (int sig)
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{
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usr_interrupt = 1;
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}
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/* The child process executes this function. */
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void
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child_function (void)
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{
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/* Perform initialization. */
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printf ("I'm here!!! My pid is %d.\n", (int) getpid ());
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/* Let parent know you're done. */
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kill (getppid (), SIGUSR1);
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/* Continue with execution. */
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puts ("Bye, now....");
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exit (0);
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}
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int
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main (void)
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{
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struct sigaction usr_action;
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sigset_t block_mask;
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pid_t child_id;
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/* Establish the signal handler. */
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sigfillset (&block_mask);
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usr_action.sa_handler = synch_signal;
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usr_action.sa_mask = block_mask;
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usr_action.sa_flags = 0;
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sigaction (SIGUSR1, &usr_action, NULL);
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/* Create the child process. */
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child_id = fork ();
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if (child_id == 0)
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child_function (); /* Does not return. */
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/*@group*/
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/* Busy wait for the child to send a signal. */
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while (!usr_interrupt)
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;
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/*@end group*/
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/* Now continue execution. */
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puts ("That's all, folks!");
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return 0;
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}
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