adding implementation of err/errx for non-linux builds

diff --git a/bsdiff.c b/bsdiff.c
index 35aa742..2ff30c1 100644 (file)
--- a/bsdiff.c
+++ b/bsdiff.c
@@ -31,13 +31,49 @@ __FBSDID("$FreeBSD: src/usr.bin/bsdiff/bsdiff/bsdiff.c,v 1.1 2005/08/06 01:59:05
 #include <sys/types.h>
 
 #include <bzlib.h>
-#include <err.h>
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
+#if defined(__linux__)
+#include <err.h>
+#else
+static int err(int eval, const char* fmt, ...)
+{
+       const char* errortext;
+       char* strp;
+       va_list args;
+
+       errortext = strerror(errno);
+       if (fmt != NULL || strcmp(fmt,"") != 0) {
+               strp = (char*)malloc(1024 * sizeof(char));
+               va_start(args, fmt);
+               vsnprintf(strp, 1023, fmt, args);
+               va_end(args);
+               fprintf(stderr, "%s: %s\b", strp, errortext);
+               free(strp);
+       } else {
+               fprintf(stderr, "%s\n", errortext);
+       }
+
+       exit(eval);
+       return 0;
+}
+
+static int errx(int eval, const char* fmt, ...)
+{
+       va_list args;
+       va_start(args, fmt);
+       vfprintf(stderr, fmt, args);
+       va_end(args);
+
+       exit(eval);
+       return 0;
+}
+#endif
+
 #define MIN(x,y) (((x)<(y)) ? (x) : (y))
 
 static void split(off_t *I,off_t *V,off_t start,off_t len,off_t h)