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author | Yuqian Yang <crupest@crupest.life> | 2025-02-28 23:13:39 +0800 |
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committer | Yuqian Yang <crupest@crupest.life> | 2025-02-28 23:13:39 +0800 |
commit | dc1f0c4c0096013799416664894c5194dc7e1f52 (patch) | |
tree | 2f5d235f778cd720f4c39ec3e56b77ba6d99f375 /store/works/life/operating-system-course-design/read-file.c | |
parent | 7299d424d90b1effb6db69e3476ddd5af72eeba4 (diff) | |
download | crupest-dc1f0c4c0096013799416664894c5194dc7e1f52.tar.gz crupest-dc1f0c4c0096013799416664894c5194dc7e1f52.tar.bz2 crupest-dc1f0c4c0096013799416664894c5194dc7e1f52.zip |
chore(store): move everything to store.
Diffstat (limited to 'store/works/life/operating-system-course-design/read-file.c')
-rw-r--r-- | store/works/life/operating-system-course-design/read-file.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/store/works/life/operating-system-course-design/read-file.c b/store/works/life/operating-system-course-design/read-file.c new file mode 100644 index 0000000..fe71f94 --- /dev/null +++ b/store/works/life/operating-system-course-design/read-file.c @@ -0,0 +1,25 @@ +#include <bits/types.h> +#include <fcntl.h> +#include <sys/stat.h> +#include <unistd.h> +#include <stdio.h> + +int main() { + int fd = open("/mnt/fat-test/big", O_RDONLY); + if (fd < 0) + return 1; + + __off_t size = lseek(fd, 0, SEEK_END); + if (size < 0) + return 2; + + for (__off_t i = 512; i <= size; i += 512) { + if (lseek(fd, size - i, SEEK_SET) < 0) + return 3; + char buffer[512]; + if (read(fd, buffer, 512) < 0) + return 4; + } + + return 0; +} |