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 $dbname
}
get_instance
似乎很管用。在错误消息的中间,我得到我的
dbname
,但仍然返回语法错误。 oracle@testdb01:db01:/home/oracle/
> ./test.sh
./test.sh: line 3: get_instance{: command not found
DB01
./test.sh: line 11: syntax error near unexpected token `}'
./test.sh: line 11: `}'
如果完全删除函数调用,则得到的结果没有错误:
dbname=$(sqlplus -s / as sysdba<<EOF
set pages 0
set feedback off
select name from v\$database;
exit;
EOF)
echo $dbname
oracle@testdb01:db01:/home/oracle
> ./test.sh
DB01
我需要做什么才能让它在函数中工作?
编辑:
以下建议将括号放在EOF标记后并添加函数关键字:
> vi test.sh
"test.sh" 12 lines, 160 characters
#!/bin/bash
# updated file
function get_instance{
dbname=$(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:`'
最佳答案
函数声明错误:
get_instance{
应该是
function get_instance {
get_instance() {
将闭合托架放在另一条线上:
dbname=$(sqlplus -s / as sysdba<<EOF
...
EOF
)
heredoc的终止字应该是行上的唯一字符(使用
<<-
时的制表符除外)。演示:$ x=$(cat <<END
> one
> two
> END)
bash: warning: here-document at line 5 delimited by end-of-file (wanted `END')
$ echo "$x"
one
two
所以它意外地成功了。更好的做法是:
$ y=$(cat <<END
> 1
> 2
> END
> )
$ echo "$y"
1
2