https://github.com/git/git
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Tip revision: 3b827444811d7eddeddd44850f5dbbb4d59747f5 authored by Junio C Hamano on 30 July 2017, 22:02:37 UTC
Git 2.11.3
Tip revision: 3b82744
pread.c
#include "../git-compat-util.h"

ssize_t git_pread(int fd, void *buf, size_t count, off_t offset)
{
        off_t current_offset;
        ssize_t rc;

        current_offset = lseek(fd, 0, SEEK_CUR);

        if (lseek(fd, offset, SEEK_SET) < 0)
                return -1;

        rc = read_in_full(fd, buf, count);

        if (current_offset != lseek(fd, current_offset, SEEK_SET))
                return -1;
        return rc;
}
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