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Fix shell lexical chdir slash appending and fd leaks.

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This commit is contained in:
Jonas 'Sortie' Termansen 2015-02-15 12:58:42 +01:00
parent 0806a9dfb1
commit 8eae7f359a
1 changed files with 7 additions and 10 deletions
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17
sh/sh.cpp
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@ -1227,16 +1227,17 @@ int lexical_chdir(char* path)
assert(path[0] == '/');
int fd = open("/", O_RDONLY | O_DIRECTORY);
if ( fd < 0 )
return -1;
size_t input_index = 1;
size_t output_index = 1;
bool last_was_slash = true;
while ( path[input_index] )
{
if ( path[input_index] == '/' )
{
if ( !last_was_slash )
if ( output_index && path[output_index-1] != '/' )
path[output_index++] = path[input_index];
input_index++;
continue;
@ -1267,11 +1268,9 @@ int lexical_chdir(char* path)
lc = path[output_index];
path[output_index] = '\0';
int new_fd = open(path, O_RDONLY | O_DIRECTORY);
close(fd);
if ( new_fd < 0 )
{
close(fd);
return -1;
}
fd = new_fd;
path[output_index] = lc;
continue;
@ -1287,7 +1286,6 @@ int lexical_chdir(char* path)
for ( size_t i = 0; i < elem_length; i++ )
path[output_index++] = path[input_index++];
last_was_slash = false;
elem[elem_length] = lc;
}
@ -1296,12 +1294,11 @@ int lexical_chdir(char* path)
if ( 2 <= output_index && path[output_index-1] == '/' )
path[--output_index] = '\0';
if ( fd < 0 )
int fchdir_ret = fchdir(fd);
close(fd);
if ( fchdir_ret < 0 )
return -1;
if ( fchdir(fd) < 0 )
return close(fd), -1;
unsetenv("PWD");
setenv("PWD", path, 1);