#include "cvs.h"
#include <sys/types.h>
List *variable_list;
static void variable_delproc (Node *);
static void
variable_delproc (Node *node)
{
free (node->data);
}
void
variable_set (char *nameval)
{
char *p;
char *name;
Node *node;
p = nameval;
while (isalnum ((unsigned char) *p) || *p == '_')
++p;
if (*p != '=')
error (1, 0, "invalid 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'))
error (1, 0, "linefeed in user variable value in %s", nameval);
if (!variable_list)
variable_list = getlist ();
node = findnode (variable_list, name);
if (!node)
{
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);
}
}
static const char *
expand_variable (const char *name, const char *cvsroot,
const char *file, int line)
{
if (!strcmp (name, CVSROOT_ENV))
return cvsroot;
else if (!strcmp (name, "RCSBIN"))
{
error (0, 0, "RCSBIN internal variable is no longer supported");
return NULL;
}
else if (!strcmp (name, EDITOR1_ENV))
return Editor;
else if (!strcmp (name, EDITOR2_ENV))
return Editor;
else if (!strcmp (name, EDITOR3_ENV))
return Editor;
else if (!strcmp (name, "USER"))
return getcaller ();
else if (!strcmp (name, "SESSIONID")
|| !strcmp (name, "COMMITID"))
return global_session_id;
else if (isalpha (name[0]))
{
if (line)
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)
{
if (line)
error (0, 0, "%s:%d: no such user variable ${%s}",
file, line, name);
else
error (0, 0, "%s: no such user variable ${%s}",
file, name);
return NULL;
}
return node->data;
}
else
{
if (line)
error (0, 0, "%s:%d: unrecognized variable syntax %s",
file, line, name);
else
error (0, 0, "%s: unrecognized variable syntax %s",
file, name);
return NULL;
}
}
char *
expand_path (const char *name, const char *cvsroot, bool formatsafe,
const char *file, int line)
{
size_t s, d, p;
const char *e;
char *mybuf = NULL;
size_t mybuf_size = 0;
char *buf = NULL;
size_t buf_size = 0;
char inquotes = '\0';
char *result;
s = d = 0;
expand_string (&mybuf, &mybuf_size, d + 1);
while ((mybuf[d++] = name[s]) != '\0')
{
if (name[s] == '\\')
{
if (name[++s])
{
expand_string (&mybuf, &mybuf_size, d + 1);
mybuf[d++] = name[s++];
}
}
else if (inquotes == '\'')
{
if (name[s++] == '\'')
{
inquotes = '\0';
}
}
else if (name[s] == '\'')
{
s++;
inquotes = '\'';
}
else if (name[s] == '"')
{
s++;
if (inquotes) inquotes = '\0';
else inquotes = '"';
}
else if (name[s++] == '$')
{
int flag = (name[s] == '{');
p = d;
expand_string (&mybuf, &mybuf_size, d + 1);
for (; (mybuf[d++] = name[s]); s++)
{
if (flag
? name[s] =='}'
: !isalnum (name[s]) && name[s] != '_')
break;
expand_string (&mybuf, &mybuf_size, d + 1);
}
mybuf[--d] = '\0';
e = expand_variable (&mybuf[p+flag], cvsroot, file, line);
if (e)
{
expand_string (&mybuf, &mybuf_size, d + 1);
for (d = p - 1; (mybuf[d++] = *e++); )
{
expand_string (&mybuf, &mybuf_size, d + 1);
if (mybuf[d-1] == '"')
{
if (inquotes)
{
mybuf[d-1] = '\\';
expand_string (&mybuf, &mybuf_size, d + 1);
mybuf[d++] = '"';
}
}
else if (formatsafe && mybuf[d-1] == '%')
{
expand_string (&mybuf, &mybuf_size, d + 1);
mybuf[d] = '%';
d++;
}
}
--d;
if (flag && name[s])
s++;
}
else
goto error_exit;
}
expand_string (&mybuf, &mybuf_size, d + 1);
}
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)
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);
goto error_exit;
#else
struct passwd *ps;
ps = getpwnam (buf + d);
if (ps == NULL)
{
if (line)
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);
goto error_exit;
}
e = ps->pw_dir;
#endif
}
if (!e)
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) free (mybuf);
if (buf) free (buf);
return NULL;
}