static void vg_cleanup_env(void)
{
HChar **envp = (HChar**)*_NSGetEnviron();
env_unsetenv(envp, "VALGRIND_LAUNCHER");
env_unsetenv(envp, "DYLD_SHARED_REGION");
// GrP fixme should be more like mash_colon_env()
env_unsetenv(envp, "DYLD_INSERT_LIBRARIES");
}
int start_command(struct child_process *cmd)
{
int need_in, need_out;
int fdin[2] = { -1, -1 };
int fdout[2] = { -1, -1 };
const char **env = (const char **)environ;
need_in = !cmd->no_stdin && cmd->in < 0;
if (need_in) {
if (pipe(fdin) < 0)
return -ERR_RUN_COMMAND_PIPE;
cmd->in = fdin[1];
cmd->close_in = 1;
}
need_out = !cmd->no_stdout
&& !cmd->stdout_to_stderr
&& cmd->out < 0;
if (need_out) {
if (pipe(fdout) < 0) {
if (need_in)
close_pair(fdin);
return -ERR_RUN_COMMAND_PIPE;
}
cmd->out = fdout[0];
cmd->close_out = 1;
}
{
if (cmd->no_stdin)
fdin[0] = open("/dev/null", O_RDWR);
else if (need_in) {
/* nothing */
} else if (cmd->in) {
fdin[0] = cmd->in;
}
if (cmd->no_stdout)
fdout[1] = open("/dev/null", O_RDWR);
else if (cmd->stdout_to_stderr)
fdout[1] = dup(2);
else if (need_out) {
/* nothing */
} else if (cmd->out > 1) {
fdout[1] = cmd->out;
}
if (cmd->dir)
die("chdir in start_command() not implemented");
if (cmd->dir && chdir(cmd->dir))
die("exec %s: cd to %s failed (%s)", cmd->argv[0],
cmd->dir, strerror(errno));
if (cmd->env) {
if (cmd->merge_env) {
env = copy_environ();
for (; *cmd->env; cmd->env++) {
if (strchr(*cmd->env, '='))
die("setting environment in start_command() not implemented");
else
env_unsetenv(env, *cmd->env);
}
}
else
env = cmd->env;
}
if (cmd->git_cmd) {
cmd->pid = spawnve_git_cmd(cmd->argv, fdin, fdout, env);
} else {
cmd->pid = spawnvpe_pipe(cmd->cmd ? cmd->cmd : cmd->argv[0], cmd->argv, env, fdin, fdout);
}
}
if (cmd->pid < 0) {
if (need_in)
close_pair(fdin);
if (need_out)
close_pair(fdout);
return -ERR_RUN_COMMAND_FORK;
}
return 0;
}
