1. rpmbuild -ba test-fsmMkfifo.spec
```
[root@localhost SPECS]# cat test-fsmMkfifo.spec
Name: hello
Version: 1.0
Release: 1
Group: Testing
License: GPL
Summary: Simple rpm demonstration.
Source0: hello-1.0.tar.gz
%description
Simple rpm demonstration.
%prep
%build
%install
mkfifo %{buildroot}/test-fifo
%files
/test-fifo
```
2. rpm -ivh /root/rpmbuild/RPMS/aarch64/hello-1.0-1.aarch64.rpm
The problem can be reproduced according to the preceding steps.
The stack is as follows:
```
(gdb) bt
#0 0x0000ffff9f9a74f4 in __libc_openat64 (fd=fd@entry=11,
file=file@entry=0xaaaafa6fa8a0 "/test-fifo;6360cb13", oflag=oflag@entry=33024)
at ../sysdeps/unix/sysv/linux/openat64.c:45
#1 0x0000ffff9f9a746c in __openat_2 (fd=fd@entry=11,
file=file@entry=0xaaaafa6fa8a0 "/test-fifo;6360cb13", oflag=oflag@entry=33024)
at openat_2.c:28
#2 0x0000ffffa011512c in openat (__oflag=33024, __path=0xaaaafa6fa8a0
"/test-fifo;6360cb13", __fd=11) at /usr/include/bits/fcntl2.h:133
#3 fsmOpenat (dirfd=11, path=0xaaaafa6fa8a0 "/test-fifo;6360cb13", flags=256)
at fsm.c:420
#4 0x0000ffffa0117514 in rpmPackageFilesInstall (ts=<optimized out>,
te=<optimized out>, files=<optimized out>, psm=psm@entry=0xaaaafa621f60,
failedFile=failedFile@entry=0xfffff71bf0f0) at fsm.c:1140
#5 0x0000ffffa011df0c in rpmpsmUnpack (psm=psm@entry=0xaaaafa621f60) at
psm.c:595
#6 0x0000ffffa011ef04 in rpmPackageInstall (psm=0xaaaafa621f60,
ts=0xaaaafa5e81a0) at psm.c:676
#7 runGoal (goal=PKG_INSTALL, psm=0xaaaafa621f60) at psm.c:843
#8 rpmpsmRun (ts=0xaaaafa5e81a0, te=te@entry=0xaaaafa61caa0, goal=PKG_INSTALL)
at psm.c:884
#9 0x0000ffffa014765c in rpmteProcess (te=te@entry=0xaaaafa61caa0,
goal=<optimized out>, num=num@entry=0) at rpmte.c:817
#10 0x0000ffffa01530c4 in rpmtsProcess (ts=0xaaaafa5e81a0) at transaction.c:1628
#11 rpmtsRun (ts=ts@entry=0xaaaafa5e81a0, okProbs=okProbs@entry=0x0,
ignoreSet=<optimized out>) at transaction.c:1842
#12 0x0000ffffa013be70 in rpmcliTransaction (ts=ts@entry=0xaaaafa5e81a0,
ia=ia@entry=0xffffa01d7868 <rpmIArgs>, numPackages=1)
at rpminstall.c:291
#13 0x0000ffffa013de4c in rpmInstall (ts=0xaaaafa5e81a0, ia=0xffffa01d7868
<rpmIArgs>, fileArgv=<optimized out>) at rpminstall.c:633
#14 0x0000aaaadf362ce8 in main (argc=3, argv=<optimized out>) at rpm.c:265
```
I think the reason is that the fifo file is opened in blocking mode. Is this
reasonable? Should non-blocking be used?
--
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