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Win32: fix environment memory leaks
All functions that modify the environment have memory leaks. Disable gitunsetenv in the Makefile and use env_setenv (via mingw_putenv) instead (this frees removed environment entries). Move xstrdup from env_setenv to make_augmented_environ, so that mingw_putenv no longer copies the environment entries (according to POSIX [1], "the string [...] shall become part of the environment"). This also fixes the memory leak in gitsetenv, which expects a POSIX compliant putenv. [1] http://pubs.opengroup.org/onlinepubs/009695399/functions/putenv.html Note: This patch depends on taking control of char **environ and having our own mingw_putenv (both introduced in "Win32: Unicode environment (incoming)"). Signed-off-by: Karsten Blees <blees@dcon.de> Signed-off-by: Stepan Kasal <kasal@ucw.cz> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -1220,14 +1220,14 @@ static char **env_setenv(char **env, const char *name)
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for (i = 0; env[i]; i++)
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;
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env = xrealloc(env, (i+2)*sizeof(*env));
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env[i] = xstrdup(name);
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env[i] = (char*) name;
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env[i+1] = NULL;
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}
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}
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else {
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free(env[i]);
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if (*eq)
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env[i] = xstrdup(name);
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env[i] = (char*) name;
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else
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for (; env[i]; i++)
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env[i] = env[i+1];
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@ -1242,8 +1242,10 @@ char **make_augmented_environ(const char *const *vars)
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{
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char **env = copy_environ();
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while (*vars)
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env = env_setenv(env, *vars++);
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while (*vars) {
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const char *v = *vars++;
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env = env_setenv(env, strchr(v, '=') ? xstrdup(v) : v);
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}
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return env;
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}
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@ -209,6 +209,7 @@ char *mingw_getenv(const char *name);
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#define getenv mingw_getenv
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int mingw_putenv(const char *namevalue);
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#define putenv mingw_putenv
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#define unsetenv mingw_putenv
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int mingw_gethostname(char *host, int namelen);
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#define gethostname mingw_gethostname
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@ -326,7 +326,6 @@ ifeq ($(uname_S),Windows)
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NO_IPV6 = YesPlease
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NO_UNIX_SOCKETS = YesPlease
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NO_SETENV = YesPlease
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NO_UNSETENV = YesPlease
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NO_STRCASESTR = YesPlease
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NO_STRLCPY = YesPlease
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NO_MEMMEM = YesPlease
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@ -479,7 +478,6 @@ ifneq (,$(findstring MINGW,$(uname_S)))
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NO_SYMLINK_HEAD = YesPlease
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NO_UNIX_SOCKETS = YesPlease
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NO_SETENV = YesPlease
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NO_UNSETENV = YesPlease
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NO_STRCASESTR = YesPlease
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NO_STRLCPY = YesPlease
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NO_MEMMEM = YesPlease
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