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30 Commits

Author SHA1 Message Date
Todd C. Miller
727056e0c9 Make sure SIGCHLD is not ignored when sudo is executed. 
If SIGCHLD is ignored there is a race condition between when the
process is executed and when the SIGCHLD handler is installed.
This fixes the bug described by GitHub PR #98
 2021-04-23 07:41:27 -06:00
Todd C. Miller
446ae3f507 Include string.h unconditionally and only use strings.h for strn?casecmp() 
In the pre-POSIX days BSD had strings.h, not string.h.
Now strings.h is only used for non-ANSI string functions.
 2020-05-18 07:59:24 -06:00
Todd C. Miller
dd88460800 We no longer need to include headers we don't use for sudo*.h files. 
Previously we needed to include headers required by the various
sudo*h files.  Now those files are more self-sufficient and we
should only include headers needed by code in the various .c files.
 2020-05-18 06:47:04 -06:00
Todd C. Miller
486ee2b71f debug_decl and debug_decl_vars now require a semicolon at the end. 2019-12-22 08:48:16 -07:00
Todd C. Miller
1e1ef61902 Add SPDX-License-Identifier to files. 2019-04-29 07:21:51 -06:00
Todd C. Miller
6c3d20cb41 Convert PVS-Studio comment to ANSI C. 2018-10-26 08:39:09 -06:00
Todd C. Miller
64e5d34c57 Add comments in .c files so PVS-Studio will check them. 2018-10-21 08:46:05 -06:00
Todd C. Miller
48fba3c2cc update my email to Todd.Miller@sudo.ws 2017-12-03 17:53:40 -07:00
Todd C. Miller
486ced7c11 Sprinkle some extra debugging printfs 2017-11-29 13:13:33 -07:00
Todd C. Miller
d979898e71 Remove use of non-standard sigaction_t 2017-05-12 10:02:18 -06:00
Todd C. Miller
15790b69c2 Add SIGCHLD to the list of signals we install sudo_handler() for. 
Otherwise, it is possible for the command to exit before the SIGCHLD
handler is installed.  POSIX says that signals that are ignored by
default are still ignored even if the signal mask would block them.
We need to have a handler installed for SIGCHLD before the fork().
 2017-05-12 10:02:17 -06:00
Todd C. Miller
1186f39842 Use SUDO_EV_SIGNAL and SUDO_EV_SIGINFO instead of managing the 
signal_pipe explicitly.
 2017-05-12 10:02:17 -06:00
Todd C. Miller
35e4bd3e9f Replace pipe_nonblock() with pipe2() 2017-03-13 12:11:52 -06:00
Todd C. Miller
3f022419ae Be consistent with the naming of the variable used to store the 
function return value.  Previously, some code used "rval", some
used "ret".  This standardizes on "ret" and uses "rc" for temporary
return codes.
 2016-09-08 16:38:08 -06:00
Todd C. Miller
7625f06841 Now that we ignore SIGPIPE in sudo we need to restore it at exec 
time.  Problem reported by Radovan Sroka of RedHat.
 2016-08-24 08:59:37 -06:00
Todd C. Miller
b4309d4aea Ignore SIGPIPE for the duration of sudo and not just in a few select 
places.  We have no control over what nss, PAM modules or sudo
plugins might do so ignoring SIGPIPE is safest.
 2016-04-22 16:36:36 -06:00
Todd C. Miller
0b241088b3 There's no need to conditionalize the #include <unistd.h>, we require 
a POSIX system.
 2015-07-02 09:08:28 -06:00
Todd C. Miller
4a07b472f0 Only include stddef.h where it is needed. 2015-06-20 05:34:35 -06:00
Todd C. Miller
dc883f2454 We require ANSI C so stop using the obsolete STDC_HEADERS. 2015-06-19 14:29:27 -06:00
Todd C. Miller
59ab26dbcc Go back to a 2 args debug_decl and just use the "default" instance, 
now renamed "active".
 2015-02-01 08:24:49 -07:00
Todd C. Miller
866cfc4fc3 Add support for multiple Debug lines per program. Callers may 
register arbitrary debug facilities or use built-in defaults.  We
now use separate Debug statements for plugins and programs.
 2014-10-22 13:23:05 -06:00
Todd C. Miller
328c563791 Check return value of sigaction(), even though it should never fail. 2014-09-04 10:13:26 -06:00
Todd C. Miller
db494700d6 We write an unsigned char, not an int, to the signal pipe. 2014-08-22 11:06:05 -06:00
Todd C. Miller
aecef4aa1d Rename warning/fatal -> sudo_warn/sudo_fatal to avoid namespace 
pollution in libsudo_util.so.
 2014-06-27 09:30:52 -06:00
Todd C. Miller
d628e17ead Handle EINTR from write(2) when writing to pipes and socket pairs. 2014-05-27 10:16:49 -06:00
Todd C. Miller
96eb2c4f8f Add warning_gettext() wrapper function that changes to the user locale, 
then calls gettext().
Add U_ macro that calls warning_gettext() instead of gettext().
Rename warning2()/error2() back to warning_nodebug()/error_nodebug().
 2013-11-18 08:59:57 -07:00
Todd C. Miller
d6282d154a Update copyright years. 2013-04-24 09:35:02 -04:00
Todd C. Miller
39acd2fcba Rename error/errorx -> fatal/fatalx and remove the exit value as 
it was always 1.
 2013-04-18 14:07:59 -04:00
Todd C. Miller
e764604485 Remove extra flag to sudo_sigaction(). We want to trap the signal 
regardless of whether or not it is ignored by the underlying command
since there's no way to know what signal handlers the command will
install.  Now we just use sudo_sigaction() to set a flag in
saved_signals[] to indicate whether a signal needs to be restored
before exec.
 2013-01-19 15:10:01 -05:00
Todd C. Miller
855a11af2b Move signal code into its own source file and add sudo_sigaction() 
wrapper that has an extra flag to check the saved_signals list to
only install the handler if the signal is not already ignored.
Bump plugin API version for the new front-end signal behavior.
 2013-01-17 13:29:46 -05:00