compat/setenv.c

   1 #include "../git-compat-util.h"
   2
   3 int gitsetenv(const char *name, const char *value, int replace)
   4 {
   5         int out;
   6         size_t namelen, valuelen;
   7         char *envstr;
   8
   9         if (!name || !value) return -1;
  10         if (!replace) {
  11                 char *oldval = NULL;
  12                 oldval = getenv(name);
  13                 if (oldval) return 0;
  14         }
  15
  16         namelen = strlen(name);
  17         valuelen = strlen(value);
  18         envstr = malloc((namelen + valuelen + 2));
  19         if (!envstr) return -1;
  20
  21         memcpy(envstr, name, namelen);
  22         envstr[namelen] = '=';
  23         memcpy(envstr + namelen + 1, value, valuelen);
  24         envstr[namelen + valuelen + 1] = 0;
  25
  26         out = putenv(envstr);
  27         /* putenv(3) makes the argument string part of the environment,
  28          * and changing that string modifies the environment --- which
  29          * means we do not own that storage anymore.  Do not free
  30          * envstr.
  31          */
  32
  33         return out;
  34 }