Unix/Linux Go Back    

CentOS 7.0 - man page for daemon (centos section 3)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:   man
Select Man Page Set:       apropos Keyword Search (sections above)

DAEMON(3)			    Linux Programmer's Manual				DAEMON(3)

       daemon - run in the background

       #include <unistd.h>

       int daemon(int nochdir, int noclose);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       daemon(): _BSD_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500)

       The  daemon()  function	is for programs wishing to detach themselves from the controlling
       terminal and run in the background as system daemons.

       If nochdir is zero, daemon() changes the calling process's current  working  directory  to
       the root directory ("/"); otherwise, the current working directory is left unchanged.

       If  noclose is zero, daemon() redirects standard input, standard output and standard error
       to /dev/null; otherwise, no changes are made to these file descriptors.

       (This function forks, and if the fork(2) succeeds, the parent calls _exit(2), so that fur-
       ther  errors  are seen by the child only.)  On success daemon() returns zero.  If an error
       occurs, daemon() returns -1 and sets errno to any of the errors specified for the  fork(2)
       and setsid(2).

       Not in POSIX.1-2001.  A similar function appears on the BSDs.  The daemon() function first
       appeared in 4.4BSD.

       The glibc implementation can also return -1 when /dev/null exists but is not  a	character
       device with the expected major and minor numbers.  In this case errno need not be set.

       fork(2), setsid(2)

       This  page  is  part of release 3.53 of the Linux man-pages project.  A description of the
       project,    and	  information	 about	  reporting    bugs,	can    be    found     at

GNU					    2009-12-05					DAEMON(3)
Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums

All times are GMT -4. The time now is 06:19 PM.