#include "cvs.h"
#include <sys/types.h>
static char *expand_variable PROTO((const char *env, const char *file,
int line));
List *variable_list = NULL;
static void variable_delproc PROTO ((Node *));
static void
variable_delproc (node)
Node *node;
{
free (node->data);
}
void
variable_set (nameval)
char *nameval;
{
char *p;
char *name;
Node *node;
p = nameval;
while (isalnum ((unsigned char) *p) || *p == '_')
++p;
if (*p != '=')
error (1, 0, "illegal character in user variable name in %s", nameval);
if (p == nameval)
error (1, 0, "empty user variable name in %s", nameval);
name = xmalloc (p - nameval + 1);
strncpy (name, nameval, p - nameval);
name[p - nameval] = '\0';
++p;
if (strchr (p, '\012') != NULL)
error (1, 0, "linefeed in user variable value in %s", nameval);
if (variable_list == NULL)
variable_list = getlist ();
node = findnode (variable_list, name);
if (node == NULL)
{
node = getnode ();
node->type = VARIABLE;
node->delproc = variable_delproc;
node->key = name;
node->data = xstrdup (p);
(void) addnode (variable_list, node);
}
else
{
free (node->data);
node->data = xstrdup (p);
free (name);
}
}
char *
expand_path (name, file, line)
const char *name;
const char *file;
int line;
{
size_t s, d, p;
char *e;
char *mybuf = NULL;
size_t mybuf_size = 0;
char *buf = NULL;
size_t buf_size = 0;
char *result;
s = d = 0;
while (name[s] != '\0')
{
if (name[s] == '$')
{
p = d;
if (name[++s] == '{')
{
while (name[++s] != '}' && name[s] != '\0')
{
expand_string (&mybuf, &mybuf_size, p + 1);
mybuf[p++] = name[s];
}
if (name[s] == '}') ++s;
}
else
{
while (isalnum ((unsigned char) name[s]) || name[s] == '_')
{
expand_string (&mybuf, &mybuf_size, p + 1);
mybuf[p++] = name[s++];
}
}
expand_string (&mybuf, &mybuf_size, p + 1);
mybuf[p] = '\0';
e = expand_variable (mybuf + d, file, line);
if (e)
{
p = strlen(e);
expand_string (&mybuf, &mybuf_size, d + p);
memcpy(mybuf + d, e, p);
d += p;
}
else
goto error_exit;
}
else
{
expand_string (&mybuf, &mybuf_size, d + 1);
mybuf[d++] = name[s++];
}
}
expand_string (&mybuf, &mybuf_size, d + 1);
mybuf[d++] = '\0';
s = d = 0;
if (mybuf[s] == '~')
{
p = d;
while (mybuf[++s] != '/' && mybuf[s] != '\0')
{
expand_string (&buf, &buf_size, p + 1);
buf[p++] = name[s];
}
expand_string (&buf, &buf_size, p + 1);
buf[p] = '\0';
if (p == d)
e = get_homedir ();
else
{
#ifdef GETPWNAM_MISSING
if (line != 0)
error (0, 0,
"%s:%d:tilde expansion not supported on this system",
file, line);
else
error (0, 0, "%s:tilde expansion not supported on this system",
file);
return NULL;
#else
struct passwd *ps;
ps = getpwnam (buf + d);
if (ps == 0)
{
if (line != 0)
error (0, 0, "%s:%d: no such user %s",
file, line, buf + d);
else
error (0, 0, "%s: no such user %s", file, buf + d);
return NULL;
}
e = ps->pw_dir;
#endif
}
if (e == NULL)
error (1, 0, "cannot find home directory");
p = strlen(e);
expand_string (&buf, &buf_size, d + p);
memcpy(buf + d, e, p);
d += p;
}
p = strlen(mybuf + s) + 1;
expand_string (&buf, &buf_size, d + p);
memcpy(buf + d, mybuf + s, p);
free (mybuf);
result = xstrdup (buf);
free (buf);
return result;
error_exit:
if (mybuf != NULL)
free (mybuf);
if (buf != NULL)
free (buf);
return NULL;
}
static char *
expand_variable (name, file, line)
const char *name;
const char *file;
int line;
{
if (strcmp (name, CVSROOT_ENV) == 0)
return current_parsed_root->directory;
else if (strcmp (name, "RCSBIN") == 0)
{
error (0, 0, "RCSBIN internal variable is no longer supported");
return NULL;
}
else if (strcmp (name, EDITOR1_ENV) == 0)
return Editor;
else if (strcmp (name, EDITOR2_ENV) == 0)
return Editor;
else if (strcmp (name, EDITOR3_ENV) == 0)
return Editor;
else if (strcmp (name, "USER") == 0)
return getcaller ();
else if (isalpha ((unsigned char) name[0]))
{
if (line != 0)
error (0, 0, "%s:%d: no such internal variable $%s",
file, line, name);
else
error (0, 0, "%s: no such internal variable $%s",
file, name);
return NULL;
}
else if (name[0] == '=')
{
Node *node;
node = findnode (variable_list, name + 1);
if (node == NULL)
{
if (line != 0)
error (0, 0, "%s:%d: no such user variable ${%s}",
file, line, name);
else
error (0, 0, "%s: no such user variable ${%s}",
file, name);
return NULL;
}
return node->data;
}
else
{
if (line != 0)
error (0, 0, "%s:%d: unrecognized variable syntax %s",
file, line, name);
else
error (0, 0, "%s: unrecognized variable syntax %s",
file, name);
return NULL;
}
}