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Do tilde expansion in resolve_config_filename()

This commit is contained in:
Přemysl Eric Janouch 2015-07-01 23:22:07 +02:00
parent 439bc3acd3
commit 34569e2b62
1 changed files with 42 additions and 0 deletions
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liberty.c
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@ -46,6 +46,7 @@
#include <syslog.h>
#include <fnmatch.h>
#include <iconv.h>
#include <pwd.h>
#include <sys/socket.h>
#include <sys/types.h>
@ -2193,6 +2194,37 @@ get_xdg_config_dirs (struct str_vector *out)
split_str_ignore_empty (xdg_config_dirs, ':', out);
}
static char *
try_expand_tilde (const char *filename)
{
size_t until_slash = strcspn (filename, "/");
if (!until_slash)
{
struct str expanded;
str_init (&expanded);
str_append_env_path (&expanded, "HOME", false);
str_append (&expanded, filename);
return str_steal (&expanded);
}
int buf_len = sysconf (_SC_GETPW_R_SIZE_MAX);
if (buf_len < 0)
buf_len = 1024;
struct passwd pwd, *success = NULL;
char *user = xstrndup (filename, until_slash);
char *buf = xmalloc (buf_len);
while (getpwnam_r (user, &pwd, buf, buf_len, &success) == ERANGE)
buf = xrealloc (buf, buf_len <<= 1);
free (user);
char *result = NULL;
if (success)
result = xstrdup_printf ("%s%s", pwd.pw_dir, filename + until_slash);
free (buf);
return result;
}
static char *
resolve_config_filename (const char *filename)
{
@ -2200,6 +2232,16 @@ resolve_config_filename (const char *filename)
if (*filename == '/')
return xstrdup (filename);
// We don't want to use wordexp() for this as it may execute /bin/sh
if (*filename == '~')
{
// Paths to home directories ought to be absolute
char *expanded = try_expand_tilde (filename + 1);
if (expanded)
return expanded;
print_debug ("failed to expand the home directory in `%s'", filename);
}
struct str_vector paths;
str_vector_init (&paths);
get_xdg_config_dirs (&paths);