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#include <stdio.h>
#include <errno.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
int main() {
struct stat s;
int modes[] = {O_RDONLY, O_WRONLY, O_RDWR};
char nonexistent_name[] = "/noexist-##";
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 16; j++) {
int flags = modes[i];
if (j & 0x1) flags |= O_CREAT;
if (j & 0x2) flags |= O_EXCL;
if (j & 0x4) flags |= O_TRUNC;
if (j & 0x8) flags |= O_APPEND;
printf("EXISTING FILE %d,%d\n", i, j);
printf("success: %d\n", open("/test-file", flags, 0777) != -1);
printf("errno: %d\n", errno);
stat("/test-file", &s);
printf("st_mode: 0%o\n", s.st_mode & 037777777000);
memset(&s, 0, sizeof s);
printf("\n");
errno = 0;
printf("EXISTING FOLDER %d,%d\n", i, j);
printf("success: %d\n", open("/test-folder", flags, 0777) != -1);
printf("errno: %d\n", errno);
stat("/test-folder", &s);
printf("st_mode: 0%o\n", s.st_mode & 037777777000);
memset(&s, 0, sizeof s);
printf("\n");
errno = 0;
nonexistent_name[9] = 'a' + i;
nonexistent_name[10] = 'a' + j;
printf("NON-EXISTING %d,%d\n", i, j);
printf("success: %d\n", open(nonexistent_name, flags, 0777) != -1);
printf("errno: %d\n", errno);
stat(nonexistent_name, &s);
printf("st_mode: 0%o\n", s.st_mode & 037777777000);
memset(&s, 0, sizeof s);
printf("\n");
errno = 0;
}
}
printf("CREAT\n");
printf("success: %d\n", creat("/creat-me", 0777) != -1);
printf("errno: %d\n", errno);
return 0;
}
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