X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?a=blobdiff_plain;f=lib.c;h=bd40ee08ab77376f74b1ce5715b9740a16c82e71;hb=39247dfa3b672c958ecfdfe9e104bfcb2d267db6;hp=6c3cd0aff62924cd3e98449ae30616b54ce164a4;hpb=9f56f874416db295bdb50d448bd99cdd34db969d;p=userv.git

diff --git a/lib.c b/lib.c
index 6c3cd0a..bd40ee0 100644
--- a/lib.c
+++ b/lib.c
@@ -2,7 +2,7 @@
  * userv - lib.c
  * useful utility routines, used in daemon, but not very dependent on it
  *
- * Copyright (C)1996-1997 Ian Jackson
+ * Copyright (C)1996-1997,1999 Ian Jackson
  *
  * This is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by
@@ -25,8 +25,11 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
+#include <assert.h>
+#include <sys/types.h>
 
 #include "config.h"
+#include "common.h"
 #include "lib.h"
 
 char *xstrcat3save(const char *a, const char *b, const char *c) {
@@ -67,10 +70,12 @@ void *xrealloc(void *p, size_t s) {
   return p;
 }
 
-void makeroom(char **buffer, int *size, int needed) {
-  if (*size >= needed) return;
+int makeroom(char **buffer, int *size, int needed) {
+  if (needed > MAX_GENERAL_STRING) return -1;
+  if (*size >= needed) return 0;
   *buffer= xrealloc(*buffer,needed);
   *size= needed;
+  return 0;
 }
 
 void vsnyprintf(char *buffer, size_t size, const char *fmt, va_list al) {
@@ -108,3 +113,19 @@ void snytprintfcat(char *buffer, size_t size, const char *fmt, ...) {
   vsnytprintfcat(buffer,size,fmt,al);
   va_end(al);
 }
+
+#ifndef HAVE_SETENV
+int setenv(const char *name, const char *value, int overwrite) {
+  static char *buffer= 0;
+  static int avail= 0;
+
+  int r;
+  
+  assert(overwrite==1);
+  r= makeroom(&buffer,&avail,strlen(name)+strlen(value)+2);
+  if (r) { errno= EINVAL; return -1; }
+
+  sprintf(buffer,"%s=%s",name,value);
+  return putenv(buffer);
+}
+#endif /* HAVE_SETENV */