Split into multiple files

[slstatus.git] / util.c

diff --git a/util.c b/util.c
new file mode 100644 (file)
index 0000000..98c5fc5
--- /dev/null
+++ b/util.c
@@ -0,0 +1,42 @@
+#include <err.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "util.h"
+
+const char *
+bprintf(const char *fmt, ...)
+{
+       va_list ap;
+       size_t len;
+
+       va_start(ap, fmt);
+       len = vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
+       va_end(ap);
+
+       if (len >= sizeof(buf))
+               buf[sizeof(buf)-1] = '\0';
+
+       return buf;
+}
+
+int
+pscanf(const char *path, const char *fmt, ...)
+{
+       FILE *fp;
+       va_list ap;
+       int n;
+
+       if (!(fp = fopen(path, "r"))) {
+               warn("fopen %s: %s\n", path, strerror(errno));
+               return -1;
+       }
+       va_start(ap, fmt);
+       n = vfscanf(fp, fmt, ap);
+       va_end(ap);
+       fclose(fp);
+
+       return (n == EOF) ? -1 : n;
+}