Hi, all,
I try to run a quite simple bash script mytest.sh in cygwin, it's content is:
#!/bin/bash
echo "It is my first bash shell"
there are three lines in the script. The second line is blank line.
When I run it use command: bash c:/mytest.sh, ... (6 Replies)
what does the '+' sign stand for on the output of ls command on cygwin?
-rw-------+ 1 milhan None 146783 Jun 19 12:10 schedule.pdf
-rw-------+ 1 milhan None 320 Aug 15 17:14 current.txt
-rw------- 1 milhan None 24576 Dec 28 2008 fdfd.txt (2 Replies)
Hello,
In my make file (make 3.81), I use a combination of shell commands to automatically create the name of my build directory.
OS := $(shell uname -s)
ARCH := $(shell uname -m)
KERN := $(shell uname -r | cut -d. -f 1,2)
BDIR := $(OS)_$(KERN).$(ARCH)When I boot into different OSs, I... (7 Replies)
I have set up a bash script to run a long list of things that I need to time. I would like to redirect the output of time to a file. I have set it up like,
echo "Runtimes for servlet 4, 100K structures" > test_times.txt
echo "" >> test_times.txt
echo "runs where N=10" >> test_times.txt
echo... (7 Replies)
I'm using Notepad++ to edit my BASH scripts and using CYGWIN to run them from Windows7.
In Notepad++ there is a 'Run' capability. How do I get this to run my scripts directly without having to enter the script name from the Cygwin command line? (3 Replies)
Hi,
I am trying to write a bash script, to open firefox and then open a local webpage in a tab. This is a shell of what I have
#! /bin/sh
alias firefox='/cygdrive/c/Program\ Files/Mozilla\ Firefox/firefox.exe'
$URL='/cygdrive/d/Playback.html'
firefox &
sleep 1
for i in 1 2 3 4 5 #6 7 8 9... (1 Reply)
I am using CygWin to run a bash file but I am getting weird results.
#!/bin/bash
mkdir CLEANDATA
mv *FASTA CLEANDATA
cd CLEANDATA
ls
echo "COMPLETE"
And this is what I get
$ ./Pipe.txt
./Pipe.txt: line 5: $'ls\r': command not found
COMPLETE
Moreover, the new folder is... (1 Reply)
Hi everybody,
First, I'm sorry for my bad english!
I have the following situation:
I have a Windows 2012 R2 with Cygwin installed. The Windows Server is used as a backup Server with Dell AppAssure installed. At the moment, AppAssure saves Backup Targets to a repository on his D. The... (9 Replies)
Hello,
I work in Ubuntu 16.04, I am new to Bash and something is wrong with my script, please help.
I have a few hundreds of subjects data (like subj003.nii.gz, subj012.nii.gz etc. up to subj567.nii.gz) in a directory /usr/afewmoredirectories/subjects.
I may run for each subject a command... (5 Replies)
I am trying to use a batch file to automatically execute a bash script with no luck this far.
The batch script looks like this:
C:\Cygwin64\bin\bash test.sh
I have also tried this:
C:\Cygwin64\bin\bash "C:\Cygwin64\bin\test.sh"
Needless to say that the windows box has Cygwin... (7 Replies)
Discussion started by: Xterra
7 Replies
LEARN ABOUT REDHAT
system
SYSTEM(3) Linux Programmer's Manual SYSTEM(3)NAME
system - execute a shell command
SYNOPSIS
#include <stdlib.h>
int system(const char *string);
DESCRIPTION
system() executes a command specified in string by calling /bin/sh -c string, and returns after the command has been completed. During
execution of the command, SIGCHLD will be blocked, and SIGINT and SIGQUIT will be ignored.
RETURN VALUE
The value returned is -1 on error (e.g. fork failed), and the return status of the command otherwise. This latter return status is in the
format specified in wait(2). Thus, the exit code of the command will be WEXITSTATUS(status). In case /bin/sh could not be executed, the
exit status will be that of a command that does exit(127).
If the value of string is NULL, system() returns nonzero if the shell is available, and zero if not.
system() does not affect the wait status of any other children.
CONFORMING TO
ANSI C, POSIX.2, BSD 4.3
NOTES
As mentioned, system() ignores SIGINT and SIGQUIT. This may make programs that call it from a loop uninterruptable, unless they take care
themselves to check the exit status of the child. E.g.
while(something) {
int ret = system("foo");
if (WIFSIGNALED(ret) &&
(WTERMSIG(ret) == SIGINT || WTERMSIG(ret) == SIGQUIT))
break;
}
Do not use system() from a program with suid or sgid privileges, because strange values for some environment variables might be used to
subvert system integrity. Use the exec(3) family of functions instead, but not execlp(3) or execvp(3). system() will not, in fact, work
properly from programs with suid or sgid privileges on systems on which /bin/sh is bash version 2, since bash 2 drops privileges on
startup. (Debian uses a modified bash which does not do this when invoked as sh.)
The check for the availability of /bin/sh is not actually performed; it is always assumed to be available. ISO C specifies the check, but
POSIX.2 specifies that the return shall always be non-zero, since a system without the shell is not conforming, and it is this that is
implemented.
It is possible for the shell command to return 127, so that code is not a sure indication that the execve() call failed.
SEE ALSO sh(1), signal(2), wait(2), exec(3)
2001-09-23 SYSTEM(3)