diff options
Diffstat (limited to 'libbb/wfopen_input.c')
-rw-r--r-- | libbb/wfopen_input.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/libbb/wfopen_input.c b/libbb/wfopen_input.c new file mode 100644 index 0000000..46ff7a6 --- /dev/null +++ b/libbb/wfopen_input.c @@ -0,0 +1,48 @@ +/* vi: set sw=4 ts=4: */ +/* + * wfopen_input implementation for busybox + * + * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org> + * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + */ + +/* A number of applets need to open a file for reading, where the filename + * is a command line arg. Since often that arg is '-' (meaning stdin), + * we avoid testing everywhere by consolidating things in this routine. + */ + +#include "libbb.h" + +FILE* FAST_FUNC fopen_or_warn_stdin(const char *filename) +{ + FILE *fp = stdin; + + if (filename != bb_msg_standard_input + && NOT_LONE_DASH(filename) + ) { + fp = fopen_or_warn(filename, "r"); + } + return fp; +} + +FILE* FAST_FUNC xfopen_stdin(const char *filename) +{ + FILE *fp = fopen_or_warn_stdin(filename); + if (fp) + return fp; + xfunc_die(); /* We already output an error message. */ +} + +int FAST_FUNC open_or_warn_stdin(const char *filename) +{ + int fd = STDIN_FILENO; + + if (filename != bb_msg_standard_input + && NOT_LONE_DASH(filename) + ) { + fd = open_or_warn(filename, O_RDONLY); + } + + return fd; +} |