GETUSERSHELLSection: Linux Programmer's Manual (3)
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NAMEgetusershell, setusershell, endusershell - get permitted user shells
#include <unistd.h> char *getusershell(void); void setusershell(void); void endusershell(void);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
DESCRIPTIONThe getusershell() function returns the next line from the file /etc/shells, opening the file if necessary. The line should contain the pathname of a valid user shell. If /etc/shells does not exist or is unreadable, getusershell() behaves as if /bin/sh and /bin/csh were listed in the file.
The setusershell() function rewinds /etc/shells.
RETURN VALUEThe getusershell() function returns a NULL pointer on end-of-file.
COLOPHONThis page is part of release 3.21 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.