compat/unsetenv.c

   1 #include "../git-compat-util.h"
   2
   3 void gitunsetenv (const char *name)
   4 {
   5      int src, dst;
   6      size_t nmln;
   7
   8      nmln = strlen(name);
   9
  10      for (src = dst = 0; environ[src]; ++src) {
  11           size_t enln;
  12           enln = strlen(environ[src]);
  13           if (enln > nmln) {
  14                /* might match, and can test for '=' safely */
  15                if (0 == strncmp (environ[src], name, nmln)
  16                    && '=' == environ[src][nmln])
  17                     /* matches, so skip */
  18                     continue;
  19           }
  20           environ[dst] = environ[src];
  21           ++dst;
  22      }
  23      environ[dst] = NULL;
  24 }