Mark
63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
#include <sys/fcntl.h>
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#include <unistd.h>
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#include <stdint.h>
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#include <errno.h>
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#include <stdio.h>
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int main(int argc, char **argv) {
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char c;
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puts("Hello, World!");
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struct stat test_stat;
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if (stat("/init", &test_stat) == 0) {
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printf("stat(\"/init\"):\n");
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printf(" st_size = %u\n", test_stat.st_size);
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printf(" st_mode = %d%d%d\n", (test_stat.st_mode >> 6) & 0x7,
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(test_stat.st_mode >> 3) & 0x7,
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test_stat.st_mode & 0x7);
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}
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if (stat("/1etc/file.txt", &test_stat) == 0) {
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printf("stat(\"/etc/file.txt\"):\n");
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printf(" st_size = %u\n", test_stat.st_size);
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printf(" st_mode = %d%d%d\n", (test_stat.st_mode >> 6) & 0x7,
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(test_stat.st_mode >> 3) & 0x7,
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test_stat.st_mode & 0x7);
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} else {
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perror("stat()");
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}
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int fd = open("/etc/file.txt", O_RDONLY, 0);
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if (fd >= 0) {
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printf("Opened /etc/file.txt\n");
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char buf[512];
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ssize_t count;
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if ((count = read(fd, buf, sizeof(buf))) > 0) {
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printf("Read data from file:\n");
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write(STDOUT_FILENO, buf, count);
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printf("\n");
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}
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close(fd);
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}
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while (1) {
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if (read(STDIN_FILENO, &c, 1) < 0) {
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break;
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}
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if (c == '\n') {
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break;
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}
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printf("Typed: %c\n", c);
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}
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printf("Exited\n");
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return 0;
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}
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