Not having a GOTO is actually very good for structured programming. Think of the process you are trying to achieve and then split every action into simpler steps, then repeat until you can go no smaller.
Each final action should be either in a sequence, a condition or a loop. Using GOTO allows you to write spaghetti that is difficult to follow when you need to trace an error. It's lazy really.
If you write functions for the section of code you may or may not need, then a simple loop at the end actually makes it easier.
or
with which you need to call exit from one of the functions.
The shells sh, ksh, bash etc. are not limited. They work as designed and deny the lazy use of GOTO which can cause more problems than the minor inconvenience it leaves.
Hi,
I'm a novice and I'd like to make a directory structure with a hundred or so folders. I've tried mkdir /foo/foo1/etc...
mkdir /foo/foo2/etc
mkdir /foo/foo3/etc
mkdir /foo/foo4/etc
...but it appends '@' to each folder name and then fails on the subdirectories. Is it better to use a... (2 Replies)
hello every one this is my first post ... well i'm new to linux ....
i've been enjoying shell scripting tutorials and i'm new to writting scripts
i want to write a script that creates a directory tree named in hexadecimal but i'm stuck at the hexadecimal part ... here is my code (incase i... (2 Replies)
i want to write a script that creates a directory tree named in hexadecimal but i'm stuck at the hexadecimal part ... here is my code (incase i was dealing with intergers ...using bash)
max=39
for((i=1;i<=max;i++))
do
mkdir $i
cd $i
done
i have tried using "typeset i16 i" but... (7 Replies)
hi,
i have a script that runs on bash and would like to run it on a machine that has csh and bash. the default setting on that machine is csh. i dont want to change my code to run it with a csh shell. is there any way i can run the script (written in bash) on this machine? in other words is there... (3 Replies)
Does anyone have a same of a bash script that cd to a directory and execute a cgi script then moves onto the next directory then executes another cgi ? (3 Replies)
Hello,
I have a database file, named data.txt, and a shell script (convert.sh) to convert data.txt from columns to row. Output file name will be column_to_row.txt
In this example data.txt has only four rows.
Format of data.txt is:
info name surname telefon_nr
Data.txt
info boris... (1 Reply)
In the bash below I am trying to run the script entire script including the ....(which is a bunch of code) and then in the run function if the user response is y (line in bold). then start processing from execute function. Basically, goto the # extract folder for variable filename line and start... (4 Replies)
Hello guys,
I want to parse a JSON file in order to get the data in a table form.
My JSON file is like this:
{
"document":{
"page":
},
{
"column":
}
]
},
{
... (6 Replies)
]I would like to make the second file label 'b' print down the first file label 'a', like shifting down the file creating new lines I want it to print all the way down until the first line of the second file hit the last line of the first file. Would I have to put this into a file itself or could I... (24 Replies)
Well, guys I saw a question about GOTO for Python.
So this gave me the inspiration to attempt a GOTO function for 'dash', (bash and ksh too).
Machine: MBP OSX 10.14.3, default bash terminal, calling '#!/usr/local/bin/dash'...
This is purely a fun project to see if it is possible in PURE... (3 Replies)
Discussion started by: wisecracker
3 Replies
LEARN ABOUT SUNOS
setusershell
getusershell(3C) Standard C Library Functions getusershell(3C)NAME
getusershell, setusershell, endusershell - get legal user shells
SYNOPSIS
#include <unistd.h>
char *getusershell(void);
void setusershell(void);
void endusershell(void);
DESCRIPTION
The getusershell() function returns a pointer to a legal user shell as defined by the system manager in the file /etc/shells. If
/etc/shells does not exist, the following locations of the standard system shells are used in its place:
/bin/bash /bin/csh
/bin/jsh /bin/ksh
/bin/pfcsh /bin/pfksh
/bin/pfsh /bin/sh
/bin/tcsh /bin/zsh
/sbin/jsh /sbin/pfsh
/sbin/sh /usr/bin/bash
/usr/bin/csh /usr/bin/jsh
/usr/bin/ksh /usr/bin/pfcsh
/usr/bin/pfksh /usr/bin/pfsh
/usr/bin/sh /usr/bin/tcsh
/usr/bin/zsh /usr/xpg4/bin/sh
The getusershell() function opens the file /etc/shells, if it exists, and returns the next entry in the list of shells.
The setusershell() function rewinds the file or the list.
The endusershell() function closes the file, frees any memory used by getusershell() and setusershell(), and rewinds the file /etc/shells.
RETURN VALUES
The getusershell() function returns a null pointer on EOF.
BUGS
All information is contained in memory that may be freed with a call to endusershell(), so it must be copied if it is to be saved.
SunOS 5.10 30 Aug 2004 getusershell(3C)