Better file structure and build system

[sysstatus.git] / src / tools / tools.c

diff --git a/src/tools/tools.c b/src/tools/tools.c
new file mode 100644 (file)
index 0000000..abb8a0d
--- /dev/null
+++ b/src/tools/tools.c
@@ -0,0 +1,60 @@
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include "tools.h"
+
+char powerToChar(int power)
+{
+  switch(power)
+  {
+    case 0:
+      return 'b';
+    case 1:
+      return 'k';
+    case 2:
+      return 'M';
+    case 3:
+      return 'G';
+    case 4:
+      return 'T';
+    case 5:
+      return 'P';
+    case 6:
+      return 'E';
+  }
+
+  return '?';
+}
+
+
+void statusError(char *where, char *what, char *extra)
+{
+  fprintf(stderr, "%s: %s", where, what);
+  if (extra) {
+    fprintf(stderr, " -- %s", extra);
+  }
+  fputs("\n", stderr);
+}
+
+
+ssize_t fileRead(char *buf, size_t bufsize, char *file)
+{
+  int fd;
+  int readbytes;
+
+  fd = open(file, 0);
+  if (fd < 0) {
+    return -1;
+  }
+
+  readbytes = read(fd, buf, bufsize - 1);
+  close(fd);
+
+  if (readbytes > 0) {
+    buf[readbytes] = '\0';
+  } else {
+    buf[0] = '\0';
+  }
+
+  return readbytes;
+}