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SCP: Allow all external environment variable expansion

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as discussed in #1057
This commit is contained in:
Mark Pizzolato 2021-07-29 21:17:44 -07:00
parent 5f8a8cca9d
commit 9ef08cba0d
1 changed files with 18 additions and 1 deletions
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19
scp.c
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@ -660,6 +660,11 @@ static t_bool sim_if_result[MAX_DO_NEST_LVL+1];
static t_bool sim_if_result_last[MAX_DO_NEST_LVL+1];
static t_bool sim_cptr_is_action[MAX_DO_NEST_LVL+1];
static DEVICE *sim_failed_reset_dptr = NULL;
static struct deleted_env_var {
char *name;
char *value;
} *sim_external_env = NULL;
static int sim_external_env_count = 0;
t_stat sim_last_cmd_stat; /* Command Status */
struct timespec cmd_time; /* */
@ -2781,9 +2786,16 @@ for (i = 0; cmd_table[i].name; i++) {
while (alias_len > 1) {
cmd_name[alias_len] = '\0'; /* Possible short form command name */
--alias_len;
if (getenv (cmd_name)) /* Externally defined command alias? */
if (getenv (cmd_name)) { /* Externally defined command alias? */
++sim_external_env_count;
sim_external_env = (struct deleted_env_var *)realloc (sim_external_env, sim_external_env_count * sizeof (*sim_external_env));
sim_external_env[sim_external_env_count - 1].name = (char *)malloc (1 + strlen (cmd_name));
strcpy (sim_external_env[sim_external_env_count - 1].name, cmd_name);
sim_external_env[sim_external_env_count - 1].value = (char *)malloc (1 + strlen (getenv (cmd_name)));
strcpy (sim_external_env[sim_external_env_count - 1].value, getenv (cmd_name));
unsetenv (cmd_name); /* Remove it to protect against possibly malicious aliases */
}
}
free (cmd_name);
}
setenv ("SIM_NAME", sim_name, 1); /* Publish simulator name */
@ -4275,6 +4287,7 @@ free (tstr);
static const char *
_sim_get_env_special (const char *gbuf, char *rbuf, size_t rbuf_size)
{
int i;
const char *ap;
const char *fixup_needed = strchr (gbuf, ':');
char *tgbuf = NULL;
@ -4285,6 +4298,10 @@ if (fixup_needed) {
memcpy (tgbuf, gbuf, (fixup_needed - gbuf));
gbuf = tgbuf;
}
for (i = 0; i < sim_external_env_count; i++) {
if (0 == strcmp (gbuf, sim_external_env[i].name))
return sim_external_env[i].value;
}
ap = _sim_gen_env_uplowcase (gbuf, rbuf, rbuf_size);/* Look for environment variable */
if (!ap) { /* no environment variable found? */
time_t now = (time_t)cmd_time.tv_sec;