我有一个运行 command 的脚本mount -v 2>/some/file，然后使用以下正则表达式使用另一个脚本对其进行解析：
^.*[\ \t]+type[\ \t]+nfs(?![\ \t]+.*\b(?:nosuid|nosetuid)\b).*
我遇到的问题是：有一些 NFS 挂载具有豁免，禁止它们挂载nosuid（它们是 Solaris 11 IPS 存储库）。现在我需要修改我的正则表达式以排除已知的安装...
为了提供参考，这里有一些示例输出mount -v：
$ mount -v
/dev/dsk/c1t0d0s0 on / type ufs read/write/setuid/devices/rstchown/intr/largefiles/logging/xattr/onerror=panic/dev=840000 on Fri Sep 6 12:10:35 2013
/devices on /devices type devfs read/write/setuid/devices/rstchown/dev=4c00000 on Fri Sep 6 12:10:25 2013
ctfs on /system/contract type ctfs read/write/setuid/devices/rstchown/dev=4c80001 on Fri Sep 6 12:10:25 2013
proc on /proc type proc read/write/setuid/devices/rstchown/dev=4c40000 on Fri Sep 6 12:10:25 2013
mnttab on /etc/mnttab type mntfs read/write/setuid/devices/rstchown/dev=4cc0001 on Fri Sep 6 12:10:25 2013
swap on /etc/svc/volatile type tmpfs read/write/setuid/devices/rstchown/xattr/dev=4d00001 on Fri Sep 6 12:10:25 2013
objfs on /system/object type objfs read/write/setuid/devices/rstchown/dev=4d40001 on Fri Sep 6 12:10:25 2013
sharefs on /etc/dfs/sharetab type sharefs read/write/setuid/devices/rstchown/dev=4d80001 on Fri Sep 6 12:10:25 2013
/usr/lib/libc/libc_hwcap1.so.1 on /lib/libc.so.1 type lofs read/write/setuid/devices/rstchown/dev=840000 on Fri Sep 6 12:10:31 2013
fd on /dev/fd type fd read/write/setuid/devices/rstchown/dev=4f00001 on Fri Sep 6 12:10:35 2013
swap on /tmp type tmpfs read/write/setuid/devices/rstchown/xattr/dev=4d00002 on Fri Sep 6 12:10:38 2013
swap on /var/run type tmpfs read/write/setuid/devices/rstchown/xattr/dev=4d00003 on Fri Sep 6 12:10:38 2013
/dev/dsk/c1t0d0s7 on /export/home type ufs read/write/setuid/devices/rstchown/intr/largefiles/logging/xattr/onerror=panic/dev=840007 on Fri Sep 6 12:10:44 2013
sample-ips:/ips/blargSolaris11.1 on /blargSolaris11.1 type nfs remote/read/write/setuid/devices/rstchown/soft/xattr/dev=8c00001 on Tue Sep 10 12:07:46 2013
我尝试修改正则表达式以根据匹配行开头的安装排除 IP 的安装，如下所示：
^(.*|[^sample])[\ \t]+type[\ \t]+nfs(?![\ \t]+.*\b(?:nosuid|nosetuid)\b).*
但这不起作用...
答案1
不确定你用这个正则表达式做什么，但对我来说似乎很好。它似乎是 Perl，所以使用 GNU 版本的 grep-P开关，我使用了你的正则表达式，如下所示：
$ column -t mount.txt | \
grep -vP '^(.*|[^sample])[\ \t]+type[\ \t]+nfs(?![\ \t]+.*\b(?:nosuid|nosetuid)\b).*'
例子
$ column -t mount.txt | \
grep -vP '^(.*|[^sample])[\ \t]+type[\ \t]+nfs(?![\ \t]+.*\b(?:nosuid|nosetuid)\b).*'
/dev/dsk/c1t0d0s0 on / type ufs read/write/setuid/devices/rstchown/intr/largefiles/logging/xattr/onerror=panic/dev=840000 on Fri Sep 6 12:10:35 2013
/devices on /devices type devfs read/write/setuid/devices/rstchown/dev=4c00000 on Fri Sep 6 12:10:25 2013
ctfs on /system/contract type ctfs read/write/setuid/devices/rstchown/dev=4c80001 on Fri Sep 6 12:10:25 2013
proc on /proc type proc read/write/setuid/devices/rstchown/dev=4c40000 on Fri Sep 6 12:10:25 2013
mnttab on /etc/mnttab type mntfs read/write/setuid/devices/rstchown/dev=4cc0001 on Fri Sep 6 12:10:25 2013
swap on /etc/svc/volatile type tmpfs read/write/setuid/devices/rstchown/xattr/dev=4d00001 on Fri Sep 6 12:10:25 2013
objfs on /system/object type objfs read/write/setuid/devices/rstchown/dev=4d40001 on Fri Sep 6 12:10:25 2013
sharefs on /etc/dfs/sharetab type sharefs read/write/setuid/devices/rstchown/dev=4d80001 on Fri Sep 6 12:10:25 2013
/usr/lib/libc/libc_hwcap1.so.1 on /lib/libc.so.1 type lofs read/write/setuid/devices/rstchown/dev=840000 on Fri Sep 6 12:10:31 2013
fd on /dev/fd type fd read/write/setuid/devices/rstchown/dev=4f00001 on Fri Sep 6 12:10:35 2013
swap on /tmp type tmpfs read/write/setuid/devices/rstchown/xattr/dev=4d00002 on Fri Sep 6 12:10:38 2013
swap on /var/run type tmpfs read/write/setuid/devices/rstchown/xattr/dev=4d00003 on Fri Sep 6 12:10:38 2013
/dev/dsk/c1t0d0s7 on /export/home type ufs read/write/setuid/devices/rstchown/intr/largefiles/logging/xattr/onerror=panic/dev=840007 on Fri Sep 6 12:10:44 2013
您会注意到以 开头的行已sample-ips:/ips/blargSolaris11.1按照您的预期被过滤掉。