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| -rw-r--r-- | libc/unistd/usershell.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/libc/unistd/usershell.c b/libc/unistd/usershell.c new file mode 100644 index 000000000..dcd95fb6d --- /dev/null +++ b/libc/unistd/usershell.c @@ -0,0 +1,63 @@ +/* vi: set sw=4 ts=4: */ +/* getusershell and friends for uClibc + * + * Copyright (C) 2002 by Robert Griebl <griebl@gmx.de> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU Library General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License + * for more details. + * + * You should have received a copy of the GNU Library General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <stdio.h> +#include <unistd.h> + +/* Rely on the .bss to zero these */ +static FILE *fp; +static int isopen; +static char **cursh; +static char *validsh [] = { "/bin/sh", "/bin/csh", 0 }; + +void endusershell ( void ) +{ + if ( fp && isopen ) + fclose ( fp ); + isopen = 0; +} + +void setusershell ( void ) +{ + if ( isopen ) + endusershell ( ); + fp = fopen ( "/etc/shells", "r" ); + cursh = validsh; + isopen = 1; +} + +char *getusershell ( void ) +{ + char line [BUFSIZ]; + + if ( !isopen ) + setusershell ( ); + + if ( fp ) { + return fgets ( line, sizeof( line ) - 1, fp ); + } else { + char *result = *cursh; + + if ( result ) + cursh++; + return result; + } +} + |