我有以下功能:
#!/bin/bash
get_instance{
dbname=$(sqlplus -s / as sysdba<<EOF
set pages 0
set feedback off
select name from v\$database;
exit;
EOF)
echo $dbname
}
get_instance
它似乎有效。在错误消息的中间,我得到了我的信息dbname
,但仍然返回语法错误。
oracle@testdb01:db01:/home/oracle/
> ./test.sh
./test.sh: line 3: get_instance{: command not found
DB01
./test.sh: line 11: syntax error near unexpected token `}'
./test.sh: line 11: `}'
如果我完全删除了函数调用,我得到的结果没有错误:
dbname=$(sqlplus -s / as sysdba<<EOF
set pages 0
set feedback off
select name from v\$database;
exit;
EOF)
echo $dbname
oracle@testdb01:db01:/home/oracle
> ./test.sh
DB01
我需要做什么才能使其在功能中正常工作?
建议将括号放在EOF标签之后并添加function关键字:
> vi test.sh
"test.sh" 12 lines, 160 characters
#!/bin/bash
# updated file
function get_instance{
dbname=$(sqlplus -s / as sysdba<<EOF
set pages 0
set feedback off
select name from v\$database;
exit;
EOF
)
echo $dbname
}
get_instance
oracle@testdb01:db01:/home/oracle
> ./test.sh
./test.sh: line 10: syntax error near unexpected token `dbname=$(sqlplus -s / as sysdba<<EOF
set pages 0
set feedback off
select name from v\$database;
exit;
EOF
)'
./test.sh:第10行:')'
您的函数声明有误:
get_instance{
应该是其中之一
function get_instance {
get_instance() {
将右括号放在另一行上:
dbname=$(sqlplus -s / as sysdba<<EOF
...
EOF
)
Heredoc的终止词应该是该行上的唯一字符(使用时的制表符除外<<-
)。演示:
$ x=$(cat <<END
> one
> two
> END)
bash: warning: here-document at line 5 delimited by end-of-file (wanted `END')
$ echo "$x"
one
two
因此,它偶然地起作用了。更好的做法是:
$ y=$(cat <<END
> 1
> 2
> END
> )
$ echo "$y"
1
2
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