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BSD 2.11 - man page for getusershell (bsd section 3)

GETUSERSHELL(3) 					     Library Functions Manual						   GETUSERSHELL(3)

NAME
getusershell, setusershell, endusershell - get legal user shells
SYNOPSIS
char *getusershell() setusershell() endusershell()
DESCRIPTION
Getusershell returns a pointer to a legal user shell as defined by the system manager in the file /etc/shells. If /etc/shells is unread- able or does not exist, getusershell behaves as if /bin/sh and /bin/csh were listed in the file. Getusershell reads the next line (opening the file if necessary); setusershell rewinds the file; endusershell closes it.
FILES
/etc/shells
SEE ALSO
shells(5)
DIAGNOSTICS
The routine getusershell returns a null pointer (0) on EOF.
BUGS
All information is contained in a static area so it must be copied if it is to be saved. 4.3 Berkeley Distribution November 30, 1988 GETUSERSHELL(3)
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