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Diffstat (limited to 'src/lib9/readn.c')
-rw-r--r-- | src/lib9/readn.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/src/lib9/readn.c b/src/lib9/readn.c new file mode 100644 index 000000000..76e497de8 --- /dev/null +++ b/src/lib9/readn.c @@ -0,0 +1,47 @@ +/* +Inferno lib9/readn.c +http://code.google.com/p/inferno-os/source/browse/lib9/readn.c + + Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved. + Revisions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com). All rights reserved. + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. +*/ + +#include <lib9.h> + +long +readn(int f, void *av, long n) +{ + char *a; + long m, t; + + a = av; + t = 0; + while(t < n){ + m = read(f, a+t, n-t); + if(m <= 0){ + if(t == 0) + return m; + break; + } + t += m; + } + return t; +} |