1GETUSERSHELL(3)            Linux Programmer's Manual           GETUSERSHELL(3)
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NAME

6       getusershell, setusershell, endusershell - get permitted user shells
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SYNOPSIS

9       #include <unistd.h>
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11       char *getusershell(void);
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13       void setusershell(void);
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15       void endusershell(void);
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17   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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19       getusershell(), setusershell(), endusershell(): _BSD_SOURCE ||
20       (_XOPEN_SOURCE && _XOPEN_SOURCE < 500)
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DESCRIPTION

23       The getusershell()  function  returns  the  next  line  from  the  file
24       /etc/shells,  opening  the  file if necessary.  The line should contain
25       the pathname of a valid user shell.  If /etc/shells does not  exist  or
26       is  unreadable, getusershell() behaves as if  /bin/sh and /bin/csh were
27       listed in the file.
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29       The setusershell() function rewinds /etc/shells.
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31       The endusershell() function closes /etc/shells.
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RETURN VALUE

34       The getusershell() function returns a NULL pointer on end-of-file.
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FILES

37       /etc/shells
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CONFORMING TO

40       4.3BSD.
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SEE ALSO

43       shells(5)
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COLOPHON

46       This page is part of release 3.25 of the Linux  man-pages  project.   A
47       description  of  the project, and information about reporting bugs, can
48       be found at http://www.kernel.org/doc/man-pages/.
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52GNU                               2007-07-26                   GETUSERSHELL(3)
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