我想从日志文件中提取交通枢纽及其连接的相关数据。日志示例：
SCN DD1251 At Glasgow Road - Kilbowie Road
Modified By ________
Type CR
Region WS Subregion
UPSTREAM DOWNSTREAM FILTER
NODE LINK NODE LINK LINK
DD1271 C DD1271 R
DD1351 D DD1351 B
E
Stage Suffix for Offset Optimizer 1
Double Cycle Initially ? N Force Single / Double Cycling status ? N
Double Cycle Group 00 Double Cycle Ignore ? N
Allow Link Max Saturation N Link Max Sat Override N
Stages 1 2 3 4
Fixed N N N Y
LRT stage N N N N
Skip allowed N N N N
Ped stage N N N N
Ped invite N N N N
Ghost stage N N N N
Offset authority pointer 0 Split authority pointer 0
Offset opt emiss weight 000 I/green feedback inhibit N
Bus Authority 00 ACIS node 00000
Bus Mode - Central extensions N Local extensions N Recalls N
Stage skipping N Stage truncation N Cancels N
Bus Priority Selection - Multiple buses N Queue Calculation N
Hold recall if faulty N Disable recall N Disable long jtim N Real Cancel N
Bus recall recovery type 0 Bus extension recovery type 0
Offset Bus authority pointer 0 Split Bus authority pointer 0
Bus skip recovery 0 Skip importance factor 0
Bus priority status OFF
LRT sat 1 000 LRT sat 2 000 LRT sat 3 000
PEDESTRIAN FACILITIES
Ped Node N Num Ped Wait Imp Factor 000
Ped Priority 0 Max Ped Priority Freq 00
Ped Lower Sat Threshold 000 Ped Upper Sat Threshold 000
Max Ped Wait Time 000
PEDESTRIAN VARIABLE INVITATION TO CROSS
Allow Ped Invite N Ped Priority Auto 000
Ped Invite Upper Sat 000 Prio Level 1 2 3 4
Max Ped Priority Smoothed Time 000 000 000 000
Max Ped Priority Increase Length 00 00 00 00
CYCLE TIME FACILITIES
Allow Node Independence N Operator Node Independence 0
Ghost Demand Stage N Num Ghost Assessment Cycles 15
Upper Trigger Ghost 04 Lower Trigger Ghost 0
SCN DD1271 At Glasgow Road - Hume Street
Modified 13-OCT-15 15:06 By BDAVIDSON
Type CR
Region WS Subregion
UPSTREAM DOWNSTREAM FILTER
NODE LINK NODE LINK LINK
DD1301 T DD1301 A
DD1251 R DD1251 C
Stage Suffix for Offset Optimizer 1
Double Cycle Initially ? N Force Single / Double Cycling status ? N
Double Cycle Group 00 Double Cycle Ignore ? N
Allow Link Max Saturation N Link Max Sat Override N
Stages 1 2 3
Fixed N Y Y
LRT stage N N N
Skip allowed N N N
Ped stage N N N
Ped invite N N N
Ghost stage N N N
Offset authority pointer 0 Split authority pointer 0
Offset opt emiss weight 000 I/green feedback inhibit N
Bus Authority 00 ACIS node 00000
Bus Mode - Central extensions N Local extensions N Recalls N
Stage skipping N Stage truncation N Cancels N
Bus Priority Selection - Multiple buses N Queue Calculation N
Hold recall if faulty N Disable recall N Disable long jtim N Real Cancel N
Bus recall recovery type 0 Bus extension recovery type 0
Offset Bus authority pointer 0 Split Bus authority pointer 0
Bus skip recovery 0 Skip importance factor 0
Bus priority status OFF
LRT sat 1 000 LRT sat 2 000 LRT sat 3 000
PEDESTRIAN FACILITIES
Ped Node N Num Ped Wait Imp Factor 000
Ped Priority 0 Max Ped Priority Freq 00
Ped Lower Sat Threshold 000 Ped Upper Sat Threshold 000
Max Ped Wait Time 000
PEDESTRIAN VARIABLE INVITATION TO CROSS
Allow Ped Invite N Ped Priority Auto 000
Ped Invite Upper Sat 000 Prio Level 1 2 3 4
Max Ped Priority Smoothed Time 000 000 000 000
Max Ped Priority Increase Length 00 00 00 00
CYCLE TIME FACILITIES
Allow Node Independence N Operator Node Independence 0
Ghost Demand Stage N Num Ghost Assessment Cycles 15
Upper Trigger Ghost 04 Lower Trigger Ghost 0
我已经可以使用以下 Bash 脚本提取第一个相关行：
grep SCN* LOG.TXT > JUNCTIONS.txt
它创建了所有连接点的列表，如下所示：
SCN DD1251 At Glasgow Road - Kilbowie Road
SCN DD1271 At Glasgow Road - Hume Street
SCN DD1301 At Glasgow Road - Argyll Road - Cart Street
SCN DD1351 At Kilbowie Road - Chalmers Street
...
但是，我想在每个链接标题之后立即提取行，直到大量空白之前的节点的最终链接，并且不捕获从阶段后缀开始直到下一个链接的任何内容。
有没有办法修改我的 BASH 脚本，使其在找到的每个匹配实例之后包含额外的行数？
答案1
这是你想要的吗？
sed -n '/^SCN/,/^\s*$/p' LOG.TXT
它打印两个模式之间的线（以及包含它们的线）：
- 'SCN' 出现在行首 (
^SCN) - 以及包含 0 个或多个空白字符的空行 (
^\s*$)
并输出以下内容：
SCN DD1251 At Glasgow Road - Kilbowie Road
Modified By ________
Type CR
Region WS Subregion
UPSTREAM DOWNSTREAM FILTER
NODE LINK NODE LINK LINK
DD1271 C DD1271 R
DD1351 D DD1351 B
E
SCN DD1271 At Glasgow Road - Hume Street
Modified 13-OCT-15 15:06 By BDAVIDSON
Type CR
Region WS Subregion
UPSTREAM DOWNSTREAM FILTER
NODE LINK NODE LINK LINK
DD1301 T DD1301 A
DD1251 R DD1251 C
答案2
在你的例子中，awk你会想到一个程序：
awk '/^SCN/{f=1} !NF{f=0} f' LOG.TXT > JUNCTIONS.TXT
这会
- 设置一个标志
f，1当行开始时SCN - 将标志重置为
0找到空行时（在这种情况下，我们通过强加没有找到文本字段的条件来允许“视觉上空”行，而不是根本不存在任何字符） - 仅当标志为时才打印当前行
1
稍微简单一些，使用地址范围而不是显式标志：
awk '/^SCN/,/^[[:space:]]*$/' LOG.TXT > JUNCTIONS.TXT
您的示例的输出将是：
SCN DD1251 At Glasgow Road - Kilbowie Road
Modified By ________
Type CR
Region WS Subregion
UPSTREAM DOWNSTREAM FILTER
NODE LINK NODE LINK LINK
DD1271 C DD1271 R
DD1351 D DD1351 B
E
SCN DD1271 At Glasgow Road - Hume Street
Modified 13-OCT-15 15:06 By BDAVIDSON
Type CR
Region WS Subregion
UPSTREAM DOWNSTREAM FILTER
NODE LINK NODE LINK LINK
DD1301 T DD1301 A
DD1251 R DD1251 C
第一个示例不会打印分隔空白行。