search for: lock_nb

While doing migration, sometimes found suspend lock file was not unlinked in previous operations, then there is an obsolete lock file in place, which causes the current and later migration cannot get lock. That happens seldomly but do happen. After checking the source code, I found there are some places that potentially cause lock file unlinked, including: 1) in lock_suspend_event() function,

...tocol UPS driver $ Revision: 0.5 $ (2.2.2) writing error # cat /etc/nut/ups.conf [PRPC650] driver = powercom port = /dev/ttyUSB0 desc = "Test" Trying with strace shows the following: 12369 open("/dev/ttyUSB0", O_RDWR|O_EXCL|O_NOCTTY|O_NONBLOCK) = 4 12369 flock(4, LOCK_EX|LOCK_NB) = 0 12369 ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B1200 -opost -isig -icanon -echo ...}) = 0 12369 ioctl(4, TCFLSH, 0) = 0 12369 ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B1200 -opost -isig -icanon -echo ...}) = 0 12369 ioctl(4, SNDCTL_TMR_START or TCSETS, {B1200 -opost -isig...

...rg>: > @@ -251,14 +251,14 @@ > if (do_lock_port) { > errno = 0; > ret = 0; > -#ifdef HAVE_UU_LOCK > + #ifdef HAVE_UU_LOCK > ret = uu_lock(xbasename(device_path)); > -#elif defined(HAVE_FLOCK) > + #elif defined(HAVE_FLOCK) > ret = flock(fd, LOCK_EX | LOCK_NB); > -#elif defined(HAVE_LOCKF) > + #elif defined(HAVE_LOCKF) > lseek(fd, 0L, SEEK_SET); > ret = lockf(fd, F_TLOCK, 0L); > -#endif > + #endif > if (ret < 0) > upslog_with_errno(LOG_ERR, "apc_ser_try: couldn't lock the port > (%s)", device_...

...} f = open(argv[1], O_RDONLY); the_lock.l_type = F_WRLCK; the_lock.l_whence = SEEK_SET; the_lock.l_start = 0; the_lock.l_len = 0; if(f <= 0) { fprintf(stderr, "Cannot open file: %s\n", argv[1]); return 1; } fcntl(f, F_GETLK, &the_lock); retlck = flock(f, LOCK_EX | LOCK_NB); smblck = fcntl(f, F_GETLEASE, 0); fprintf(stdout, "smblck: %x\n", smblck); close(f); if((the_lock.l_type == F_UNLCK) && (retlck == 0)) { fprintf(stdout, "File is not locked\n"); } else { fprintf(stdout, "File is locked\n"); return 1; } return 0; }

...n the lock but the process is still writing to the file. Python code: import fcntl # open file in rw so I gain exclusive lock f = open("cygwin.tar","r+") # if this doesn't raise an IOError, the lock is acquired fcntl.lockf(f,fcntl.LOCK_EX|fcntl.LOCK_NB) which maps into a fcntl exclusive lock with 0 as the start, end, and whence arguments in the flock structure. In smb.conf, "locking = yes" had no effect on my process. The next thing I tried was "strict locking = yes". This had the effect that as soon as my code performs th...

Hi, OpenSSH 7.8p1 is almost ready for release, so we would appreciate testing on as many platforms and systems as possible. This is a bugfix release. Snapshot releases for portable OpenSSH are available from http://www.mindrot.org/openssh_snap/ The OpenBSD version is available in CVS HEAD: http://www.openbsd.org/anoncvs.html Portable OpenSSH is also available via git using the instructions at

One of the mbox files on my server causes dovecot to assert. I've caught the assert in gdb and have attached the backtrace. Unfortunatly my binary isn't built with debugging symbols, so I'm not sure how helpful it will be. smtp:/var$ uname -a Linux smtp 2.6.14-2-686-smp #1 SMP Sat Nov 26 13:37:07 UTC 2005 i686 GNU/Linux smtp:/var$ cat /etc/debian_version 3.1 smtp:/var$ dpkg -p

Hi, OpenSSH 7.9p1 is almost ready for release, so we would appreciate testing on as many platforms and systems as possible. This is a bugfix release. Snapshot releases for portable OpenSSH are available from http://www.mindrot.org/openssh_snap/ The OpenBSD version is available in CVS HEAD: http://www.openbsd.org/anoncvs.html Portable OpenSSH is also available via git using the instructions at

....path import sys @@ -76,6 +78,23 @@ def check_user(): raise CheckError("invalid user") def start_xenstored(): + pidfname = "/var/run/xenstore.pid" + try: + f = open(pidfname, "a") + try: + fcntl.lockf(f, fcntl.LOCK_EX | fcntl.LOCK_NB) + rootdir = os.getenv("XENSTORED_ROOTDIR") or "/var/lib/xenstored" + for i in glob.glob(rootdir + "/tdb*"): + try: + os.unlink(i) + except: + pass + os.unlink(pidfname...

...10 +#define F_GETSIG 11 + +#define F_GETLK64 33 +#define F_SETLK64 34 +#define F_SETLKW64 35 + +#define FD_CLOEXEC 1 + +#define F_RDLCK 0 +#define F_WRLCK 1 +#define F_UNLCK 2 + +#define F_EXLCK 4 +#define F_SHLCK 8 + +#define F_INPROGRESS 16 + +#define LOCK_SH 1 +#define LOCK_EX 2 +#define LOCK_NB 4 +#define LOCK_UN 8 + +#define LOCK_MAND 32 +#define LOCK_READ 64 +#define LOCK_WRITE 128 +#define LOCK_RW 192 + +typedef struct flock { + short l_type; + short l_whence; + loff_t l_start; + loff_t l_len; + pid_t l_pid; +} flock_t; + +#define F_LINUX_SPECIFIC_BASE 1024 + +#endif /* _KLIBC_AR...

This is the next patch series for scrub userland tools. Change log v1->v2: - commands now reachable as "btrfs scrub ..." instead of "btrfs filesystem scrub ..." - ability to scrub a single device instead of a whole file system - superfluous command line options removed - resume is now a separate command ("scrub resume") instead of "scrub start -r" -

I have updated the klibc patchset based on feedback received. In particular, the patchset has been reorganized so as not to break git-bisect. Additionally, this updates the patch base to 2.6.17-git12 (d38b69689c349f35502b92e20dafb30c62d49d63) and klibc 1.4.8; the main difference on the klibc side is removal of obsolete code. This is also available as a git tree at: