119 lines
2.7 KiB
C
119 lines
2.7 KiB
C
#include "cache.h"
|
|
|
|
/*
|
|
* Do not use this for inspecting *tracked* content. When path is a
|
|
* symlink to a directory, we do not want to say it is a directory when
|
|
* dealing with tracked content in the working tree.
|
|
*/
|
|
static int is_directory(const char *path)
|
|
{
|
|
struct stat st;
|
|
return (!stat(path, &st) && S_ISDIR(st.st_mode));
|
|
}
|
|
|
|
/* We allow "recursive" symbolic links. Only within reason, though. */
|
|
#define MAXDEPTH 5
|
|
|
|
const char *make_absolute_path(const char *path)
|
|
{
|
|
static char bufs[2][PATH_MAX + 1], *buf = bufs[0], *next_buf = bufs[1];
|
|
char cwd[1024] = "";
|
|
int buf_index = 1, len;
|
|
|
|
int depth = MAXDEPTH;
|
|
char *last_elem = NULL;
|
|
struct stat st;
|
|
|
|
if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
|
|
die ("Too long path: %.*s", 60, path);
|
|
|
|
while (depth--) {
|
|
if (!is_directory(buf)) {
|
|
char *last_slash = strrchr(buf, '/');
|
|
if (last_slash) {
|
|
*last_slash = '\0';
|
|
last_elem = xstrdup(last_slash + 1);
|
|
} else {
|
|
last_elem = xstrdup(buf);
|
|
*buf = '\0';
|
|
}
|
|
}
|
|
|
|
if (*buf) {
|
|
if (!*cwd && !getcwd(cwd, sizeof(cwd)))
|
|
die ("Could not get current working directory");
|
|
|
|
if (chdir(buf))
|
|
die ("Could not switch to '%s'", buf);
|
|
}
|
|
if (!getcwd(buf, PATH_MAX))
|
|
die ("Could not get current working directory");
|
|
|
|
if (last_elem) {
|
|
len = strlen(buf);
|
|
|
|
if (len + strlen(last_elem) + 2 > PATH_MAX)
|
|
die ("Too long path name: '%s/%s'",
|
|
buf, last_elem);
|
|
buf[len] = '/';
|
|
strcpy(buf + len + 1, last_elem);
|
|
free(last_elem);
|
|
last_elem = NULL;
|
|
}
|
|
|
|
if (!lstat(buf, &st) && S_ISLNK(st.st_mode)) {
|
|
len = readlink(buf, next_buf, PATH_MAX);
|
|
if (len < 0)
|
|
die ("Invalid symlink: %s", buf);
|
|
if (PATH_MAX <= len)
|
|
die("symbolic link too long: %s", buf);
|
|
next_buf[len] = '\0';
|
|
buf = next_buf;
|
|
buf_index = 1 - buf_index;
|
|
next_buf = bufs[buf_index];
|
|
} else
|
|
break;
|
|
}
|
|
|
|
if (*cwd && chdir(cwd))
|
|
die ("Could not change back to '%s'", cwd);
|
|
|
|
return buf;
|
|
}
|
|
|
|
static const char *get_pwd_cwd(void)
|
|
{
|
|
static char cwd[PATH_MAX + 1];
|
|
char *pwd;
|
|
struct stat cwd_stat, pwd_stat;
|
|
if (getcwd(cwd, PATH_MAX) == NULL)
|
|
return NULL;
|
|
pwd = getenv("PWD");
|
|
if (pwd && strcmp(pwd, cwd)) {
|
|
stat(cwd, &cwd_stat);
|
|
if (!stat(pwd, &pwd_stat) &&
|
|
pwd_stat.st_dev == cwd_stat.st_dev &&
|
|
pwd_stat.st_ino == cwd_stat.st_ino) {
|
|
strlcpy(cwd, pwd, PATH_MAX);
|
|
}
|
|
}
|
|
return cwd;
|
|
}
|
|
|
|
const char *make_nonrelative_path(const char *path)
|
|
{
|
|
static char buf[PATH_MAX + 1];
|
|
|
|
if (is_absolute_path(path)) {
|
|
if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
|
|
die("Too long path: %.*s", 60, path);
|
|
} else {
|
|
const char *cwd = get_pwd_cwd();
|
|
if (!cwd)
|
|
die("Cannot determine the current working directory");
|
|
if (snprintf(buf, PATH_MAX, "%s/%s", cwd, path) >= PATH_MAX)
|
|
die("Too long path: %.*s", 60, path);
|
|
}
|
|
return buf;
|
|
}
|