使用If / Then / Else语句在BASH脚本中调用函数

Question

I'm trying to call a function in script by using an if/then/else statement, but I keep getting no output when I run it. For example:

    start()
    {
    if [ -z /etc/redhat-release ]
       then mta
    else cron
    fi
    }

    mta()
    {
    exim -bpc
    }

    cron()
    {
    crontab -l
    }

Is this possible to do in BASH?

Answer 1

Note:

1. Declare function before the function which calls it, this is always a good habit;

2. cron is a common command in Unix/Linux system, use another name for your function please.

     #!/bin/bash mta() { # your code here } mycron() { # your code here } start() { if [ -z /etc/redhat-release ]; then mta else mycron fi } start 

Answer 2

Sure, this is possible you just need to define the function, before you call it first. In this case you have to define the functions called in the start function before the start function.