Package: libc6 Severity: normal Dear Maintainer,
I have an application that uses Posix message queues since a while. Today I realized that mq_open fails with errno 24 where it worked before. (errno 24: Too many open files) Here is a short C file to reproduce the problem. Before you start it, you have to increase msg_max system default: sysctl -w fs.mqueue.msg_max=1000 Now (as normal user) execute the following code: #include <stdio.h> #include <mqueue.h> #include <errno.h> void main(void) { struct mq_attr attr={.mq_maxmsg=900,.mq_msgsize=1020}; int rc=mq_open("/xxx",O_CREAT | O_RDONLY, 0600, &attr); printf("rc=%d errno=%d\n",rc,errno); } It returns errno 24. Using a value of 800 for .mq_maxmsg returns success. Compile with gcc x.c -o x -lrt. The system settings should allow the above values without problem: $ ls /proc/sys/fs/mqueue/|more msg_default msg_max msgsize_default msgsize_max queues_max $ cat /proc/sys/fs/mqueue/* 10 1000 8192 8192 256 Regards, Tim -- System Information: Debian Release: stretch/sid APT prefers unstable APT policy: (500, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.0.0-1-amd64 (SMP w/4 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to en_US.UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) -- To UNSUBSCRIBE, email to debian-glibc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/20150605094454.13518.60476.report...@blitz-lx.oms.de