I'm tracking down an issue with then run0 command in f41.
In a KDE konsole terminal run0 fails to work after
stty intr ^g
It just exits without an error message, exit code 130.
Running run0 via gdb or strace makes things work.
Which leaves me with fprintf debugging.
I have been adding fprintf to the code to trace the path
of execution and print key information.
What I am seeing is very odd.
For the following code the ppoll does not return, the process exits.
From io-utils.c:191
int ppoll_usec(struct pollfd *fds, size_t nfds, usec_t timeout) {
int r;
fprintf(stderr, "QQQ io-util.c:194 ppoll_usec\n");
assert(fds || nfds == 0);
/* This is a wrapper around ppoll() that does primarily two things:
*
* ✅ Takes a usec_t instead of a struct timespec
*
* ✅ Guarantees that if an invalid fd is specified we return EBADF
(i.e. converts POLLNVAL to
* EBADF). This is done because EBADF is a programming error
usually, and hence should bubble up
* as error, and not be eaten up as non-error POLLNVAL event.
*
* ⚠️ ⚠️ ⚠️ Note that this function does not add any special handling
for EINTR. Don't forget
* poll()/ppoll() will return with EINTR on any received signal
always, there is no automatic
* restarting via SA_RESTART available. Thus, typically you want to
handle EINTR not as an error,
* but just as reason to restart things, under the assumption you use
a more appropriate mechanism
* to handle signals, such as signalfd() or signal handlers. ⚠️ ⚠️ ⚠️
*/
if (nfds == 0)
return 0;
fprintf(stderr, "QQQ io-util.c:216 ppoll_usec\n");
const struct timespec *tmp_timeout = timeout == USEC_INFINITY ? NULL :
TIMESPEC_STORE(timeout);
fprintf(stderr, "QQQ io-util.c:218 ppoll_usec fds %d nfds %lu timeout
%lu\n", fds[0].fd, nfds, timeout);
r = ppoll(fds, nfds, tmp_timeout, NULL);
fprintf(stderr, "QQQ io-util.c:220 ppoll_usec r %d\n", r);
I see the fprintf for line 218 but not for 220 is stty intr ^g has been run.
It seems that the ppoll call kills the process and I see an exit code of 130.
I'm not sure how to further the debugging process.
How can I make progress on this problem?
Here are the fprintf logs from working and not working.
$
LD_LIBRARY_PATH=../BUILD/systemd-256.7-build/systemd-256.7/redhat-linux-build/src/shared
../BUILD/systemd-256.7-build/BUILDROOT/usr/bin/run0QQQ run.c:2355
QQQ run.c:2362
QQQ run.c:788 parse_argv_sudo_mode
QQQ run.c:883 parse_argv_sudo_mode
QQQ run.c:898 parse_argv_sudo_mode
QQQ run.c:901 parse_argv_sudo_mode arg_stdio 1
QQQ run.c:934 parse_argv_sudo_mode
QQQ run.c:974 parse_argv_sudo_mode
QQQ run.c:984 parse_argv_sudo_mode
QQQ pretty-print.c:423 terminal_tint_color 3
QQQ terminal-util.c:1728 get_default_background_colors
QQQ terminal-util.c:1746 get_default_background_colors
QQQ terminal-util.c:1758 get_default_background_colors
QQQ terminal-util.c:1769 get_default_background_colors
QQQ terminal-util.c:1779 get_default_background_colors
QQQ io-util.c:238 fd_wait_for_event
QQQ io-util.c:194 ppoll_usec
QQQ io-util.c:216 ppoll_usec
QQQ io-util.c:218 ppoll_usec fds 0 nfds 1 timeout 100000
QQQ io-util.c:220 ppoll_usec r 1
QQQ io-util.c:245 fd_wait_for_event ppoll_usec r 1
QQQ io-util.c:245 fd_wait_for_event ppoll_usec pollfd.revents 1
QQQ terminal-util.c:1782 get_default_background_colors fd_wait_for_event r 1
QQQ terminal-util.c:1792 get_default_background_colors read(STDIN_FILENO,) l 24
QQQ terminal-util.c:1802 get_default_background_colors
QQQ terminal-util.c:1809 get_default_background_colors
QQQ pretty-print.c:423 terminal_tint_color get_default_background_color r 0
QQQ pretty-print.c:430 terminal_tint_color
QQQ pretty-print.c:444 terminal_tint_color
QQQ pretty-print.c:449 terminal_tint_color
QQQ run.c:989 parse_argv_sudo_mode
QQQ run.c:2364 parse_argv_sudo_mode r 1
QQQ run.c:2366 r 1
QQQ io-util.c:194 ppoll_usec
QQQ io-util.c:216 ppoll_usec
QQQ io-util.c:218 ppoll_usec fds 3 nfds 1 timeout 24999993
QQQ io-util.c:220 ppoll_usec r 1
QQQ io-util.c:194 ppoll_usec
QQQ io-util.c:216 ppoll_usec
QQQ io-util.c:218 ppoll_usec fds 3 nfds 1 timeout 24999996
QQQ io-util.c:220 ppoll_usec r 1
QQQ io-util.c:238 fd_wait_for_event
QQQ io-util.c:194 ppoll_usec
QQQ io-util.c:216 ppoll_usec
QQQ io-util.c:218 ppoll_usec fds 6 nfds 1 timeout 18446744073709551615
QQQ io-util.c:220 ppoll_usec r 1
QQQ io-util.c:245 fd_wait_for_event ppoll_usec r 1
QQQ io-util.c:245 fd_wait_for_event ppoll_usec pollfd.revents 16
QQQ io-util.c:194 ppoll_usec
QQQ io-util.c:216 ppoll_usec
QQQ io-util.c:218 ppoll_usec fds 3 nfds 1 timeout 24999991
QQQ io-util.c:220 ppoll_usec r 1
Failed to start transient service unit: Access denied
$ stty intr ^g
$
LD_LIBRARY_PATH=../BUILD/systemd-256.7-build/systemd-256.7/redhat-linux-build/src/shared
../BUILD/systemd-256.7-build/BUILDROOT/usr/bin/run0
QQQ run.c:2355
QQQ run.c:2362
QQQ run.c:788 parse_argv_sudo_mode
QQQ run.c:883 parse_argv_sudo_mode
QQQ run.c:898 parse_argv_sudo_mode
QQQ run.c:901 parse_argv_sudo_mode arg_stdio 1
QQQ run.c:934 parse_argv_sudo_mode
QQQ run.c:974 parse_argv_sudo_mode
QQQ run.c:984 parse_argv_sudo_mode
QQQ pretty-print.c:423 terminal_tint_color 3
QQQ terminal-util.c:1728 get_default_background_colors
QQQ terminal-util.c:1746 get_default_background_colors
QQQ terminal-util.c:1758 get_default_background_colors
QQQ terminal-util.c:1769 get_default_background_colors
QQQ terminal-util.c:1779 get_default_background_colors
QQQ io-util.c:238 fd_wait_for_event
QQQ io-util.c:194 ppoll_usec
QQQ io-util.c:216 ppoll_usec
QQQ io-util.c:218 ppoll_usec fds 0 nfds 1 timeout 99999
$
--
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