I have an application which has a lot of cout & cerr statements.
This application also opens a log file (for eg a.log).
When this application is run from the inittab file as follows
/bin/sh -c " . /etc/timezone; exec /test"
all the cout & cerr statements are printed in the log file... (1 Reply)
Hello Everyone,
I have an option for users in my shell script to create log file. So if user saying “yes” on it, I'm redirecting all output to log file by doing this: > /output.log. However I would like the output being displayed on the screen at the same time. Is it possible? If yes, does anybody... (2 Replies)
I have to confirm that an engine was not able to run. In the output below you see that it indeed got errors, but it didn't send those messages to the output file. When I run the same thing with a different executable it works. So does this mean something in the executable could cause it not to... (7 Replies)
Hi. I'm a newbie in scripting and i have this problem: i want to use the 'fuser' command on a file to tell if it's being accessed (for my purposes: still being written). I want to save the output of the command and later compare with the 'not being used' result.
the script:
#!/bin/bash... (2 Replies)
I want to execute a command something like:
find / -name "jni.h"
and I want to direct the output of that command to some type of
filter that will leave out all the lines reporting inaccessible
directories (permission unavailable). Is this a pipe or a redirect?
For example, output like... (1 Reply)
Hi,
Pls check that '|' and '+' present in Step-1 are not copied to log file in Step-3.
Pls suggest how to get the exact output from Step-1 (i.e. with out losing '|' and '+') in to a log file
~Thanks
Step-1: Execute command
> mysql -utest -ptest -htesthost testdb -e "select * from... (3 Replies)
Hi All,
Please could anyone advise what the purpose of the dot syntax in the following command means:
tar -cvf ${WORKING_BACKUP_ROOT}/${TAR_ARCHIVE_FILE} . >/${BACKUP_ROOT}/${ARCHIVE_LOG}
Many thanks (2 Replies)
Hi,
I need to install solaris remotely via the ILOM port on a x4170 box, and I have downloaded the Solaris 11 for x86 - text install image and burned it on a DVD.
When I boot the box, it's showing the boot_archive loading percentage on the SP console, but when it's done and start the interactive... (0 Replies)
When i am issuing chage command, it reporting the output properly.
But when i redirect the output, i am not getting the output in the mentioned path.
chage -l root >> /tmp/chage.txt.
I need to use this into the script to capture the data. I think its seems to be bug with RHEL 6.3. Same... (3 Replies)
Discussion started by: Srini.rk1983
3 Replies
LEARN ABOUT FREEBSD
fd
FD(4) BSD Kernel Interfaces Manual FD(4)NAME
fd, stdin, stdout, stderr -- file descriptor files
DESCRIPTION
The files /dev/fd/0 through /dev/fd/# refer to file descriptors which can be accessed through the file system. If the file descriptor is
open and the mode the file is being opened with is a subset of the mode of the existing descriptor, the call:
fd = open("/dev/fd/0", mode);
and the call:
fd = fcntl(0, F_DUPFD, 0);
are equivalent.
Opening the files /dev/stdin, /dev/stdout and /dev/stderr is equivalent to the following calls:
fd = fcntl(STDIN_FILENO, F_DUPFD, 0);
fd = fcntl(STDOUT_FILENO, F_DUPFD, 0);
fd = fcntl(STDERR_FILENO, F_DUPFD, 0);
Flags to the open(2) call other than O_RDONLY, O_WRONLY and O_RDWR are ignored.
IMPLEMENTATION NOTES
By default, /dev/fd is provided by devfs(5), which provides nodes for the first three file descriptors. Some sites may require nodes for
additional file descriptors; these can be made available by mounting fdescfs(5) on /dev/fd.
FILES
/dev/fd/#
/dev/stdin
/dev/stdout
/dev/stderr
SEE ALSO tty(4), devfs(5), fdescfs(5)BSD June 9, 1993 BSD