Use strbuf instead of fixed-sized buffers in real_path() in order to
avoid the size limitations of the latter.
Signed-off-by: Rene Scharfe <l....@web.de>
---
abspath.c | 69 +++++++++++++++++++++++----------------------------------------
1 file changed, 25 insertions(+), 44 deletions(-)
diff --git a/abspath.c b/abspath.c
index 911e931..16e7fa2 100644
--- a/abspath.c
+++ b/abspath.c
@@ -33,7 +33,7 @@ int is_directory(const char *path)
*/
static const char *real_path_internal(const char *path, int die_on_error)
{
- static char bufs[2][PATH_MAX + 1], *buf = bufs[0], *next_buf = bufs[1];
+ static struct strbuf sb = STRBUF_INIT;
char *retval = NULL;
/*
@@ -43,14 +43,12 @@ static const char *real_path_internal(const char *path, int
die_on_error)
*/
struct strbuf cwd = STRBUF_INIT;
- int buf_index = 1;
-
int depth = MAXDEPTH;
char *last_elem = NULL;
struct stat st;
/* We've already done it */
- if (path == buf || path == next_buf)
+ if (path == sb.buf)
return path;
if (!*path) {
@@ -60,26 +58,22 @@ static const char *real_path_internal(const char *path, int
die_on_error)
goto error_out;
}
- if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX) {
- if (die_on_error)
- die("Too long path: %.*s", 60, path);
- else
- goto error_out;
- }
+ strbuf_init(&sb, 0);
+ strbuf_addstr(&sb, path);
while (depth--) {
- if (!is_directory(buf)) {
- char *last_slash = find_last_dir_sep(buf);
+ if (!is_directory(sb.buf)) {
+ char *last_slash = find_last_dir_sep(sb.buf);
if (last_slash) {
last_elem = xstrdup(last_slash + 1);
- last_slash[1] = '\0';
+ strbuf_setlen(&sb, last_slash - sb.buf + 1);
} else {
- last_elem = xstrdup(buf);
- *buf = '\0';
+ last_elem = xmemdupz(sb.buf, sb.len);
+ strbuf_reset(&sb);
}
}
- if (*buf) {
+ if (sb.len) {
if (!cwd.len && strbuf_getcwd(&cwd)) {
if (die_on_error)
die_errno("Could not get current
working directory");
@@ -87,14 +81,15 @@ static const char *real_path_internal(const char *path, int
die_on_error)
goto error_out;
}
- if (chdir(buf)) {
+ if (chdir(sb.buf)) {
if (die_on_error)
- die_errno("Could not switch to '%s'",
buf);
+ die_errno("Could not switch to '%s'",
+ sb.buf);
else
goto error_out;
}
}
- if (!getcwd(buf, PATH_MAX)) {
+ if (strbuf_getcwd(&sb)) {
if (die_on_error)
die_errno("Could not get current working
directory");
else
@@ -102,44 +97,30 @@ static const char *real_path_internal(const char *path,
int die_on_error)
}
if (last_elem) {
- size_t len = strlen(buf);
- if (len + strlen(last_elem) + 2 > PATH_MAX) {
- if (die_on_error)
- die("Too long path name: '%s/%s'",
- buf, last_elem);
- else
- goto error_out;
- }
- if (len && !is_dir_sep(buf[len - 1]))
- buf[len++] = '/';
- strcpy(buf + len, last_elem);
+ if (sb.len && !is_dir_sep(sb.buf[sb.len - 1]))
+ strbuf_addch(&sb, '/');
+ strbuf_addstr(&sb, last_elem);
free(last_elem);
last_elem = NULL;
}
- if (!lstat(buf, &st) && S_ISLNK(st.st_mode)) {
- ssize_t len = readlink(buf, next_buf, PATH_MAX);
+ if (!lstat(sb.buf, &st) && S_ISLNK(st.st_mode)) {
+ struct strbuf next_sb = STRBUF_INIT;
+ ssize_t len = strbuf_readlink(&next_sb, sb.buf, 0);
if (len < 0) {
if (die_on_error)
- die_errno("Invalid symlink '%s'", buf);
- else
- goto error_out;
- }
- if (PATH_MAX <= len) {
- if (die_on_error)
- die("symbolic link too long: %s", buf);
+ die_errno("Invalid symlink '%s'",
+ sb.buf);
else
goto error_out;
}
- next_buf[len] = '\0';
- buf = next_buf;
- buf_index = 1 - buf_index;
- next_buf = bufs[buf_index];
+ strbuf_swap(&sb, &next_sb);
+ strbuf_release(&next_sb);
} else
break;
}
- retval = buf;
+ retval = sb.buf;
error_out:
free(last_elem);
if (cwd.len && chdir(cwd.buf))
--
2.0.2
--
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