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Using C language to use system calls

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Homework and Emergencies Homework & Coursework Questions Using C language to use system calls
# 8  
Old 11-22-2012
Quote:
Originally Posted by femchi
Code:
execl("/usr/bin/find","find . -maxdepth 1 -perm 644",(char *)NULL);

it doesnt work properly. do you know what is the problem?
Like they said, it's not a shell, it doesn't split for you.

Also, if it did work, your program would immediately quit, because execl doesn't launch a new program -- it replaces your current program. If you want to create a new process, you have to fork first, then exec. Watch the return value of fork carefully. It creates a clone of your process, and its return value is the only thing which tells them which is which. You have to make sure your child process only does what the child should be doing and not anything else, make sure it quits if exec doesn't work and such.
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LEARN ABOUT OSF1

dtadvfs

dtadvfs(8)						      System Manager's Manual							dtadvfs(8)

NAME

       dtadvfs - Starts the AdvFS graphical user interface

SYNOPSIS

       /usr/bin/X11/dtadvfs [options] [-N] [-C hostname]

OPTIONS

       Turns off information messages about starting up the

       asemgr  utility.   This	message  is displayed at startup and whenever  the file system configuration is changed when the system is running
       TruCluster  Software.  Connects to other hosts that are running the AdvFS GUI daemon, advfsd.

OPERANDS

       Uses the standard X Windows options. See the X(1X) and xterm(1X) reference pages for information.

DESCRIPTION

       The AdvFS graphical user interface (GUI) organizes  AdvFS functionality into system management tasks and makes them  available	through  a
       graphical interface.

       Issue  the  dtadvfs  command to display the AdvFS GUI  Main window. This window serves as both the starting point for all AdvFS GUI-managed
       tasks and as a monitor for file-system status. When the Main window is displayed,  disk-space usage information is shown for the  host  and
       file domains.

       From  the  Main window, you can choose tasks from the following menus: Choose GUI setup options or exit the GUI.  Choose file domain, file-
       set, clone, or volume configuration  tasks.  Choose what information displays on the main window or view  devices and volumes  information.
       Choose file domain balance or defragment procedures.

       Online  help  is available for all tasks and windows available through  the GUI.  To access help, click on the Help button in any window or
       choose  Help from the menu bar to display information.

RESTRICTIONS

       You must be the root user to use this utility and you must register the Advanced File System Utilities license.

FILES

       /Storage_Management/Dtadvfs

	      The indicator for graphic icons.	The dtadvfs message log file. Remove or  copy this log to another location periodically to prevent
	      the  log from becoming  too large.  The AdvFS Manager user-interface executable file.  The dtadvfs online help files.  The dtadvfs X
	      resource file.  The dtadvfs message catalogs.  The GUI graphic icon files.  The launch script for the graphic icons.

SEE ALSO

       advfs(4), advfsd(8), X(1X), xterm(1X)

																	dtadvfs(8)