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Remove fallback to fork(2) if pdfork(2) is not available. If the parent

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process dies, the process descriptor will be closed and pdfork(2)ed child
will be killed, which is not the case when regular fork(2) is used.

The PROCDESC option is now part of the GENERIC kernel configuration, so we
can start depending on it.

Add UPDATING entry to inform that this option is now required and log
detailed instruction to syslog if pdfork(2) is not available:

	The pdfork(2) system call is not available; recompile the kernel with options PROCDESC

Submitted by:	Mariusz Zaborski <oshogbo@FreeBSD.org>
Sponsored by:	Google Summer of Code 2013
This commit is contained in:
Pawel Jakub Dawidek 2013-09-05 01:05:48 +00:00
parent 7e473ea146
commit 2057b58b17
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=255227
2 changed files with 12 additions and 10 deletions
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6
UPDATING
View File

@ -31,6 +31,12 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 10.x IS SLOW:
disable the most expensive debugging functionality run
"ln -s 'abort:false,junk:false' /etc/malloc.conf".)
20130905:
The PROCDESC kernel option is now part of the GENERIC kernel
configuration and is required for the rwhod(8) to work.
If you are using custom kernel configuration, you should include
'options PROCDESC'.
20130905:
The API and ABI related to the Capsicum framework was modified
in backward incompatible way. The userland libraries and programs

16
usr.sbin/rwhod/rwhod.c
View File

@ -274,21 +274,17 @@ main(int argc, char *argv[])
exit(1);
if (!quiet_mode) {
pid_child_receiver = pdfork(&fdp, 0);
if (pid_child_receiver == -1) {
if (errno != ENOSYS) {
syslog(LOG_ERR, "pdfork: %m");
exit(1);
} else {
pid_child_receiver = fork();
fdp = -1;
}
}
if (pid_child_receiver == 0) {
receiver_process();
} else if (pid_child_receiver > 0) {
sender_process();
} else if (pid_child_receiver == -1) {
syslog(LOG_ERR, "pdfork: %m");
if (errno == ENOSYS) {
syslog(LOG_ERR,
"The pdfork(2) system call is not available; recompile the kernel with options PROCDESC");
} else {
syslog(LOG_ERR, "pdfork: %m");
}
exit(1);
}
} else {