getusershell, setusershell, endusershell - get valid user shells

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.Lb libc

.In unistd.h char * getusershell void void setusershell void void endusershell void

The getusershell function returns a pointer to a valid user shell as defined by the system manager in the shells database as described in shells(5). If the shells database is not available, getusershell behaves as if /bin/sh and /bin/csh were listed.

The getusershell function reads the next line (opening the file if necessary); setusershell rewinds the file; endusershell closes it.

/etc/shells

The routine getusershell returns a null pointer (0) on EOF.

nsswitch.conf(5), shells(5)

The getusershell function appeared in BSD 4.3 .

The getusershell function leaves its result in an internal static object and returns a pointer to that object. Subsequent calls to getusershell will modify the same object.

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