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author | Eric Andersen | 2001-03-16 22:47:14 +0000 |
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committer | Eric Andersen | 2001-03-16 22:47:14 +0000 |
commit | aad1a88c76f208d188fd061e3723bd637437e8d5 (patch) | |
tree | 75ac2b994f7f04af776e93eeedba82b873ff557e /libbb/full_read.c | |
parent | dfba13d199bb58d802df99c1ef20fdc0d628e86d (diff) | |
download | busybox-aad1a88c76f208d188fd061e3723bd637437e8d5.zip busybox-aad1a88c76f208d188fd061e3723bd637437e8d5.tar.gz |
Convert utility.c into libbb.a. It is now a whole pile of .c
files. Clean up the resulting damage and fix up the makefile.
-Erik
Diffstat (limited to 'libbb/full_read.c')
-rw-r--r-- | libbb/full_read.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/libbb/full_read.c b/libbb/full_read.c new file mode 100644 index 0000000..e9c4bbf --- /dev/null +++ b/libbb/full_read.c @@ -0,0 +1,70 @@ +/* vi: set sw=4 ts=4: */ +/* + * Utility routines. + * + * Copyright (C) tons of folks. Tracking down who wrote what + * isn't something I'm going to worry about... If you wrote something + * here, please feel free to acknowledge your work. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU 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 + * General Public License for more details. + * + * You should have received a copy of the GNU 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 + * + * Based in part on code from sash, Copyright (c) 1999 by David I. Bell + * Permission has been granted to redistribute this code under the GPL. + * + */ + +#include <stdio.h> +#include <unistd.h> +#include "libbb.h" + + +/* + * Read all of the supplied buffer from a file. + * This does multiple reads as necessary. + * Returns the amount read, or -1 on an error. + * A short read is returned on an end of file. + */ +int full_read(int fd, char *buf, int len) +{ + int cc; + int total; + + total = 0; + + while (len > 0) { + cc = read(fd, buf, len); + + if (cc < 0) + return -1; + + if (cc == 0) + break; + + buf += cc; + total += cc; + len -= cc; + } + + return total; +} + +/* END CODE */ +/* +Local Variables: +c-file-style: "linux" +c-basic-offset: 4 +tab-width: 4 +End: +*/ |