#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
+#include <stdlib.h>
#include <string.h>
#include "util.h"
+char *argv0;
+
+static void
+verr(const char *fmt, va_list ap)
+{
+ if (argv0 && strncmp(fmt, "usage", sizeof("usage") - 1)) {
+ fprintf(stderr, "%s: ", argv0);
+ }
+
+ vfprintf(stderr, fmt, ap);
+
+ if (fmt[0] && fmt[strlen(fmt) - 1] == ':') {
+ fputc(' ', stderr);
+ perror(NULL);
+ } else {
+ fputc('\n', stderr);
+ }
+}
+
+void
+warn(const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ verr(fmt, ap);
+ va_end(ap);
+}
+
+void
+die(const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ verr(fmt, ap);
+ va_end(ap);
+
+ exit(1);
+}
+
const char *
bprintf(const char *fmt, ...)
{
va_start(ap, fmt);
if ((ret = vsnprintf(buf, sizeof(buf), fmt, ap)) < 0) {
- fprintf(stderr, "vsnprintf: %s\n", strerror(errno));
+ warn("vsnprintf:");
} else if ((size_t)ret >= sizeof(buf)) {
- fprintf(stderr, "vsnprintf: Output truncated\n");
+ warn("vsnprintf: Output truncated");
}
va_end(ap);
return buf;
}
+const char *
+fmt_scaled(size_t bytes)
+{
+ unsigned int i;
+ float scaled;
+ const char *units[] = { "B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB",
+ "ZiB", "YiB" };
+
+ scaled = bytes;
+ for (i = 0; i < LEN(units) && scaled >= 1024; i++) {
+ scaled /= 1024.0;
+ }
+
+ return bprintf("%.1f%s", scaled, units[i]);
+}
+
int
pscanf(const char *path, const char *fmt, ...)
{
int n;
if (!(fp = fopen(path, "r"))) {
- fprintf(stderr, "fopen '%s': %s\n", path, strerror(errno));
+ warn("fopen '%s':", path);
return -1;
}
va_start(ap, fmt);