/* include readn */
#include    "unp.h"##  1 ##src/lib/readn.c##

ssize_t                         /* Read "n" bytes from a descriptor. */##  2 ##src/lib/readn.c##
readn(int fd, void *vptr, size_t n)##  3 ##src/lib/readn.c##
{##  4 ##src/lib/readn.c##
    size_t  nleft;##  5 ##src/lib/readn.c##
    ssize_t nread;##  6 ##src/lib/readn.c##
    char   *ptr;##  7 ##src/lib/readn.c##

    ptr = vptr;##  8 ##src/lib/readn.c##
    nleft = n;##  9 ##src/lib/readn.c##
    while (nleft > 0) {## 10 ##src/lib/readn.c##
        if ((nread = read(fd, ptr, nleft)) < 0) {## 11 ##src/lib/readn.c##
            if (errno == EINTR)## 12 ##src/lib/readn.c##
                nread = 0;      /* and call read() again */## 13 ##src/lib/readn.c##
            else## 14 ##src/lib/readn.c##
                return (-1);## 15 ##src/lib/readn.c##
        } else if (nread == 0)## 16 ##src/lib/readn.c##
            break;              /* EOF */## 17 ##src/lib/readn.c##

        nleft -= nread;## 18 ##src/lib/readn.c##
        ptr += nread;## 19 ##src/lib/readn.c##
    }## 20 ##src/lib/readn.c##
    return (n - nleft);         /* return >= 0 */## 21 ##src/lib/readn.c##
}## 22 ##src/lib/readn.c##
/* end readn */

ssize_t## 23 ##src/lib/readn.c##
Readn(int fd, void *ptr, size_t nbytes)## 24 ##src/lib/readn.c##
{## 25 ##src/lib/readn.c##
    ssize_t n;## 26 ##src/lib/readn.c##

    if ((n = readn(fd, ptr, nbytes)) < 0)## 27 ##src/lib/readn.c##
        err_sys("readn error");## 28 ##src/lib/readn.c##
    return (n);## 29 ##src/lib/readn.c##
}## 30 ##src/lib/readn.c##