--- /dev/null
+#include "tools.h"
+#include "talloc/talloc.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+
+static int close_no_errno(int fd)
+{
+ int ret = 0, serrno = errno;
+ if (close(fd) < 0)
+ ret = errno;
+ errno = serrno;
+ return ret;
+}
+
+void *grab_fd(const void *ctx, int fd)
+{
+ int ret;
+ unsigned int max = 16384, size = 0;
+ char *buffer;
+
+ buffer = talloc_array(ctx, char, max+1);
+ while ((ret = read(fd, buffer + size, max - size)) > 0) {
+ size += ret;
+ if (size == max)
+ buffer = talloc_realloc(ctx, buffer, char, max*=2 + 1);
+ }
+ if (ret < 0) {
+ talloc_free(buffer);
+ buffer = NULL;
+ } else
+ buffer[size] = '\0';
+
+ return buffer;
+}
+
+/* This version adds one byte (for nul term) */
+void *grab_file(const void *ctx, const char *filename)
+{
+ int fd;
+ char *buffer;
+
+ if (streq(filename, "-"))
+ fd = dup(STDIN_FILENO);
+ else
+ fd = open(filename, O_RDONLY, 0);
+
+ if (fd < 0)
+ return NULL;
+
+ buffer = grab_fd(ctx, fd);
+ close_no_errno(fd);
+ return buffer;
+}
+