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any explanation for thsi shell script behaviour


 
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Top Forums Shell Programming and Scripting any explanation for thsi shell script behaviour
# 1  
Old 10-23-2001
any explanation for thsi shell script behaviour

hello

whats the difference between excuting a shell script as

a)sh myscript.sh
b). ./myscript.sh

i noticed that my shell script works fine when i run it as . ./myscript
.sh but fails when i run it as sh myscript.sh could anybody explain why.

the shell script is very simple

#!/bin/sh
startx

regards
Hrishy
# 2  
Old 10-23-2001
Try using the full path to the startx script... the . ./script will work because your path is set up, but ./script or sh script may not if it's not in the default path...
# 3  
Old 10-23-2001
Hmm Livin free

Both of the scripts

a)sh myscript.sh
b). ./myscript.sh

are in my path .but i dont undersatnd the difference in behaviour

regards
Hrishy
# 4  
Old 10-23-2001
In one case a subshell runs the script, in the second case the login shell runs the script.
# 5  
Old 11-08-2001
I'm not sure. I think that in the both cases is spawned child shell.
# 6  
Old 11-08-2001
I would have to disagree with that statement that both cases spawn a child shell.

Perderabo is correct.
# 7  
Old 11-08-2001
Agreed. Perderabo is correct.

...from the bash man page regarding dot "." notation or
"source"ing...

. filename [arguments]
source filename [arguments]
Read and execute commands from filename in the cur-
rent shell environment and return the exit status
of the last command executed from filename. If
filename does not contain a slash, pathnames in
PATH are used to find the directory containing
filename. The file searched for in PATH need not
be executable. The current directory is searched
if no file is found in PATH. If any arguments are
supplied, they become the positional parameters
when file is executed. Otherwise the positional
parameters are unchanged. The return status is the
status of the last command exited within the script
(0 if no commands are executed), and false if file-
name is not found.

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