Initial commit

kapitel13/filinfo-portabel.c

@@ -0,0 +1,39 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#if __STDC_VERSION__ >= 199901L
+#define C99
+#include <inttypes.h>
+#endif
+
+int main(int argc, char *argv[])
+{
+    struct stat fileinfo;
+    if (argc != 2)
+    {
+        fprintf(stderr, "Usage: %s path/to/file\n", argv[0]);
+        return 1;
+    }
+
+    stat(argv[1], &fileinfo);
+
+    #ifdef C99
+    printf("C99 (or newer)\n");
+    printf("Inode number: %ju\n",
+           (uintmax_t)fileinfo.st_ino);
+    printf("Size in bytes: %jd (%.2f kilobytes)\n",
+           (intmax_t)fileinfo.st_size,
+           (double)fileinfo.st_size / 1024);
+    #else
+    printf("C89\n");
+    printf("Inode number: %lu\n", (unsigned long int)fileinfo.st_ino);
+    printf("Size in bytes: %lu (%.2f kilobytes)\n",
+           (unsigned long int)fileinfo.st_size,
+           (float)fileinfo.st_size / 1024);
+    #endif
+    printf("User-ID: %d\n", fileinfo.st_uid);
+    printf("Group-ID: %d\n", fileinfo.st_gid);
+
+    return 0;
+}