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authorYuqian Yang <crupest@crupest.life>2025-02-28 23:13:39 +0800
committerYuqian Yang <crupest@crupest.life>2025-02-28 23:13:39 +0800
commit99e2e923d0c77b02f3fb4ff648ea916954868606 (patch)
treeec8e03f6f2cd1ce43990fb4fe6cd631967d0237e /store/works/life/operating-system-course-design/read-file.c
parent1cee979f5d36b311a03cc7397a036ba11caf3d42 (diff)
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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.c25
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;
+}