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author | Lorry <lorry@roadtrain.codethink.co.uk> | 2012-07-23 11:07:21 +0100 |
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committer | Lorry <lorry@roadtrain.codethink.co.uk> | 2012-07-23 11:07:21 +0100 |
commit | 7e99712021a572e6ca85ff8454d3b322bfbeaa6e (patch) | |
tree | 6577e57ca2aab59b4b6ed8f21dfdbe349c028e49 /libpam/pam_modutil_ioloop.c | |
download | linux-pam-7e99712021a572e6ca85ff8454d3b322bfbeaa6e.tar.gz |
Tarball conversion
Diffstat (limited to 'libpam/pam_modutil_ioloop.c')
-rw-r--r-- | libpam/pam_modutil_ioloop.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/libpam/pam_modutil_ioloop.c b/libpam/pam_modutil_ioloop.c new file mode 100644 index 0000000..54ab0e5 --- /dev/null +++ b/libpam/pam_modutil_ioloop.c @@ -0,0 +1,53 @@ +/* + * $Id$ + * + * These functions provides common methods for ensure a complete read or + * write occurs. It handles EINTR and partial read/write returns. + */ + +#include "pam_modutil_private.h" + +#include <unistd.h> +#include <errno.h> + +int +pam_modutil_read(int fd, char *buffer, int count) +{ + int block, offset = 0; + + while (count > 0) { + block = read(fd, &buffer[offset], count); + + if (block < 0) { + if (errno == EINTR) continue; + return block; + } + if (block == 0) return offset; + + offset += block; + count -= block; + } + + return offset; +} + +int +pam_modutil_write(int fd, const char *buffer, int count) +{ + int block, offset = 0; + + while (count > 0) { + block = write(fd, &buffer[offset], count); + + if (block < 0) { + if (errno == EINTR) continue; + return block; + } + if (block == 0) return offset; + + offset += block; + count -= block; + } + + return offset; +} |