diff options
author | jkar8572 <jkar8572> | 2002-03-27 16:40:27 +0000 |
---|---|---|
committer | jkar8572 <jkar8572> | 2002-03-27 16:40:27 +0000 |
commit | adb5b187b252912f1853722477b04db8b5f0aaed (patch) | |
tree | 1f2422b1e9d90e70a5b5c6efbe950082e84854be /quotasys.c | |
parent | 5975341695e27f23f5a58758954d1ea31c2d0d25 (diff) |
Fixed bug in quota format detection - avoid SIGSEGV on old kernels. (Jan Kara)
Diffstat (limited to 'quotasys.c')
-rw-r--r-- | quotasys.c | 12 |
1 files changed, 12 insertions, 0 deletions
@@ -15,6 +15,7 @@ #include <time.h> #include <unistd.h> #include <fcntl.h> +#include <signal.h> #include <sys/types.h> #include <sys/stat.h> #include <sys/vfs.h> @@ -542,9 +543,18 @@ void init_kernel_interface(void) } else { struct v2_dqstats v2_stats; + struct sigaction sig, oldsig; if (!stat("/proc/fs/xfs/stat", &st)) kernel_formats |= (1 << QF_XFS); + /* This signal handling is needed because old kernels send us SIGSEGV as they try to resolve the device */ + sig.sa_handler = SIG_IGN; + sig.sa_sigaction = NULL; + if (sigemptyset(&sig.sa_mask) < 0) + die(2, _("Can't create set for sigaction(): %s\n"), strerror(errno)); + sig.sa_flags = 0; + if (sigaction(SIGSEGV, &sig, &oldsig) < 0) + die(2, _("Can't set signal handler: %s\n"), strerror(errno)); if (quotactl(QCMD(Q_V2_GETSTATS, 0), NULL, 0, (void *)&v2_stats) >= 0) { version = v2_stats.version; kernel_formats |= (1 << QF_VFSV0); @@ -578,6 +588,8 @@ void init_kernel_interface(void) version = 6*10000+4*100+0; } } + if (sigaction(SIGSEGV, &oldsig, NULL) < 0) + die(2, _("Can't reset signal handler: %s\n"), strerror(errno)); } if (version > KERN_KNOWN_QUOTA_VERSION) |