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system.c
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system.c
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#include <sys/stat.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <limits.h>
#include <errno.h>
#include <assert.h>
#include <string.h>
#include <dirent.h>
#include <ctype.h>
#ifndef __MINGW32__
#include <sys/types.h>
#include <sys/stat.h>
#include <pwd.h>
#include <unistd.h>
#ifdef HAVE_GLOB_H
#include <glob.h>
#endif
#else
#include <io.h>
#include <shlobj.h>
#endif
#ifdef WITH_LIBARCHIVE
#include <archive.h>
/* For backward compatibility. */
#if ARCHIVE_VERSION_NUMBER < 3001000
#define archive_read_free(...) \
archive_read_finish(__VA_ARGS__)
#define archive_read_support_filter_all(...) \
archive_read_support_compression_all(__VA_ARGS__)
#endif
#endif
#include "system.h"
#ifdef __MINGW32__
#define mkdir(a, b) mkdir(a)
#if MAX_PATH < PATH_MAX
#error MAX_PATH < PATH_MAX. You should use MAX_PATH.
#endif
#endif
static const char *fopen_mode(unsigned int mode)
{
static const char *modes[4][2] = {
{ "ab", "a" },
{ "w+b", "w+" },
{ "rb", "r" },
{ NULL, NULL }
};
const char *(*cmode)[2] = &modes[0];
if (!(mode & DGEN_APPEND)) {
++cmode;
if (!(mode & DGEN_WRITE)) {
++cmode;
if (!(mode & DGEN_READ))
++cmode;
}
}
return (*cmode)[(!!(mode & DGEN_TEXT))];
}
enum path_type {
PATH_TYPE_UNSPECIFIED,
PATH_TYPE_RELATIVE,
PATH_TYPE_ABSOLUTE
};
#ifdef __AMIGAOS4__
/**
* Check whether a path is absolute or relative.
*
* Examples:
* /foo/bar, \\foo\\bar are absolute,
* ./foo/bar, ., .., are relative.
*
* @param[in] path Path to parse.
* @param len Length of path.
* @return Path type (PATH_TYPE_ABSOLUTE, PATH_TYPE_RELATIVE or
* PATH_TYPE_UNSPECIFIED).
*/
enum path_type path_type(const char *path, size_t len)
{
if ((len == 0) || (path[0] == '\0'))
return PATH_TYPE_UNSPECIFIED;
if (path[0] == '/')
return PATH_TYPE_ABSOLUTE;
if ((path[0] == '.') &&
(((len == 1) || (path[1] == '\0') || (path[1] == '/')) ||
((path[1] == '.') &&
((len == 2) || (path[2] == '\0') || (path[2] == '/')))))
return PATH_TYPE_RELATIVE;
return PATH_TYPE_UNSPECIFIED;
}
#else //AMIGAOS4
#ifdef __MINGW32__
/**
* Check whether a path is absolute or relative.
*
* Examples:
* /foo/bar, \\foo\\bar, c:/foo/bar are absolute,
* ./foo/bar, ., .., are relative.
*
* @param[in] path Path to parse.
* @param len Length of path.
* @return Path type (PATH_TYPE_ABSOLUTE, PATH_TYPE_RELATIVE or
* PATH_TYPE_UNSPECIFIED).
*/
enum path_type path_type(const char *path, size_t len)
{
if ((len == 0) || (path[0] == '\0'))
return PATH_TYPE_UNSPECIFIED;
if ((path[0] == '\\') || (path[0] == '/'))
return PATH_TYPE_ABSOLUTE;
if ((path[0] == '.') &&
(((len == 1) ||
(path[1] == '\0') || (path[1] == '\\') || (path[1] == '/')) ||
((path[1] == '.') &&
((len == 2) ||
(path[2] == '\0') || (path[2] == '\\') || (path[2] == '/')))))
return PATH_TYPE_RELATIVE;
do {
if (*(++path) == ':')
return PATH_TYPE_ABSOLUTE;
--len;
}
while ((len) && (*path != '\0') && (*path != '\\') && (*path != '/'));
return PATH_TYPE_UNSPECIFIED;
}
#else /* __MINGW32__ */
/**
* Check whether a path is absolute or relative.
*
* Examples:
* /foo/bar, \\foo\\bar are absolute,
* ./foo/bar, ., .., are relative.
*
* @param[in] path Path to parse.
* @param len Length of path.
* @return Path type (PATH_TYPE_ABSOLUTE, PATH_TYPE_RELATIVE or
* PATH_TYPE_UNSPECIFIED).
*/
enum path_type path_type(const char *path, size_t len)
{
if ((len == 0) || (path[0] == '\0'))
return PATH_TYPE_UNSPECIFIED;
if (path[0] == '/')
return PATH_TYPE_ABSOLUTE;
if ((path[0] == '.') &&
(((len == 1) || (path[1] == '\0') || (path[1] == '/')) ||
((path[1] == '.') &&
((len == 2) || (path[2] == '\0') || (path[2] == '/')))))
return PATH_TYPE_RELATIVE;
return PATH_TYPE_UNSPECIFIED;
}
#endif /* __MINGW32__ */
#endif //AMIGAOS4
/**
* Return user's home directory.
* The returned string doesn't have a trailing '/' and must be freed using
* free() (unless "buf" is provided).
*
* @param[in,out] buf Used to store path in. If NULL, memory is allocated.
* @param[in,out] size Size of "buf" when provided, then the returned path
* size.
* @return User's home directory (either as "buf" or a new buffer),
* NULL in case of error.
*/
char *dgen_userdir(char *buf, size_t *size)
{
char *path;
size_t sz_dir;
size_t sz;
#ifdef __AMIGAOS4__
sz_dir = strlen("PROGDIR:");
#else
#ifndef __MINGW32__
struct passwd *pwd = getpwuid(geteuid());
if ((pwd == NULL) || (pwd->pw_dir == NULL))
return NULL;
sz_dir = strlen(pwd->pw_dir);
#endif
#endif //AMIGAOS4
if (buf != NULL) {
sz = *size;
#ifdef __MINGW32__
if (sz < PATH_MAX)
return NULL;
#else
if (sz < (sz_dir + 1))
return NULL;
#endif
path = buf;
}
else {
#ifdef __MINGW32__
sz = PATH_MAX;
#else
sz = (sz_dir + 1);
#endif
if ((path = malloc(sz)) == NULL)
return NULL;
}
#ifdef __AMIGAOS4__
strncpy(path, "PROGDIR:", sz_dir);
#else
#ifndef __MINGW32__
strncpy(path, pwd->pw_dir, sz_dir);
#else
if (SHGetFolderPath(NULL, (CSIDL_PROFILE | CSIDL_FLAG_CREATE),
0, 0, path) != S_OK) {
if (buf == NULL)
free(path);
return NULL;
}
sz_dir = strlen(path);
if (sz < (sz_dir + 1)) {
if (buf == NULL)
free(path);
return NULL;
}
#endif
#endif //AMIGAOS4
path[sz_dir] = '\0';
if (size != NULL)
*size = sz_dir;
return path;
}
/**
* Return DGen's home directory with an optional subdirectory (or file).
* The returned string doesn't have a trailing '/' and must be freed using
* free() (unless "buf" is provided).
*
* @param[in,out] buf Buffer to store result in. If NULL, memory is allocated.
* @param[in,out] size Size of "buf" when provided, then the returned path
* size.
* @param[in] sub NUL-terminated string to append to the path.
* @return DGen's home directory (either as "buf" or a new buffer),
* NULL in case of error.
*/
char *dgen_dir(char *buf, size_t *size, const char *sub)
{
char *path;
size_t sz_dir;
size_t sz_sub;
const size_t sz_bd = strlen(DGEN_BASEDIR);
size_t sz;
#ifdef __AMIGAOS4__
sz_dir = strlen("PROGDIR:");
#else
#ifndef __MINGW32__
struct passwd *pwd = getpwuid(geteuid());
if ((pwd == NULL) || (pwd->pw_dir == NULL))
return NULL;
sz_dir = strlen(pwd->pw_dir);
#endif
#endif //AMIGAOS
if (sub != NULL)
sz_sub = strlen(sub);
else
sz_sub = 0;
if (buf != NULL) {
sz = *size;
#ifdef __MINGW32__
if (sz < PATH_MAX)
return NULL;
#else
if (sz < (sz_dir + 1 + sz_bd + !!sz_sub + sz_sub + 1))
return NULL;
#endif
path = buf;
}
else {
#ifdef __MINGW32__
sz = PATH_MAX;
#else
sz = (sz_dir + 1 + sz_bd + !!sz_sub + sz_sub + 1);
#endif
if ((path = malloc(sz)) == NULL)
return NULL;
}
#ifdef __AMIGAOS4__
strncpy(path, "PROGDIR:", sz_dir);
#else
#ifndef __MINGW32__
strncpy(path, pwd->pw_dir, sz_dir);
#else
if (SHGetFolderPath(NULL, (CSIDL_APPDATA | CSIDL_FLAG_CREATE),
0, 0, path) != S_OK) {
if (buf == NULL)
free(path);
return NULL;
}
sz_dir = strlen(path);
if (sz < (sz_dir + 1 + sz_bd + !!sz_sub + sz_sub + 1)) {
if (buf == NULL)
free(path);
return NULL;
}
#endif
#endif //AMIGAOS4
#ifndef __AMIGAOS4__
path[(sz_dir++)] = DGEN_DIRSEP[0];
#endif
memcpy(&path[sz_dir], DGEN_BASEDIR, sz_bd);
sz_dir += sz_bd;
if (sz_sub) {
path[(sz_dir++)] = DGEN_DIRSEP[0];
memcpy(&path[sz_dir], sub, sz_sub);
sz_dir += sz_sub;
}
path[sz_dir] = '\0';
if (size != NULL)
*size = sz_dir;
return path;
}
/**
* Open a file relative to DGen's home directory (when "relative" is NULL or
* path_type(relative) returns PATH_TYPE_UNSPECIFIED) and create the directory
* hierarchy if necessary, unless the file name is already relative to
* something or found in the current directory if mode contains DGEN_CURRENT.
*
* @param[in] relative Subdirectory to look in.
* @param[in] file File name to open.
* @param mode Mode flags to use (DGEN_READ, DGEN_WRITE and others).
* @return File pointer, or NULL in case of error.
* @see dgen_freopen()
* @see system.h
*/
FILE *dgen_fopen(const char *relative, const char *file, unsigned int mode)
{
return dgen_freopen(relative, file, mode, NULL);
}
/**
* @see dgen_fopen()
*/
FILE *dgen_freopen(const char *relative, const char *file, unsigned int mode,
FILE *f)
{
size_t size;
size_t file_size;
char *tmp;
int e = errno;
const char *fmode = fopen_mode(mode);
char *path = NULL;
if ((file == NULL) || (file[0] == '\0') || (fmode == NULL))
goto error;
/*
Try to open the file in the current directory if DGEN_CURRENT
is specified.
*/
if (mode & DGEN_CURRENT) {
FILE *fd;
if (f == NULL)
fd = fopen(file, fmode);
else
fd = freopen(file, fmode, f);
if (fd != NULL)
return fd;
}
if (path_type(file, ~0u) != PATH_TYPE_UNSPECIFIED)
size = 0;
else if ((relative == NULL) ||
(path_type(relative, ~0u) == PATH_TYPE_UNSPECIFIED)) {
if ((path = dgen_dir(NULL, &size, relative)) == NULL)
goto error;
}
else {
if ((path = strdup(relative)) == NULL)
goto error;
size = strlen(path);
}
if ((mode & (DGEN_WRITE | DGEN_APPEND)) && (path != NULL))
mkdir(path, 0777); /* XXX make that recursive */
file_size = strlen(file);
if ((tmp = realloc(path, (size + !!size + file_size + 1))) == NULL)
goto error;
path = tmp;
if (size)
path[(size++)] = DGEN_DIRSEP[0];
memcpy(&path[size], file, file_size);
size += file_size;
path[size] = '\0';
errno = e;
if (f == NULL)
f = fopen(path, fmode);
else
f = freopen(path, fmode, f);
e = errno;
free(path);
errno = e;
return f;
error:
free(path);
errno = EACCES;
return NULL;
}
/**
* Return the base name in path, like basename() but without allocating
* anything nor modifying the "path" argument.
*
* @param[in] path Path to extract the last component from.
* @return Last component from "path".
*/
const char *dgen_basename(const char *path)
{
char *tmp;
while ((tmp = strpbrk(path, DGEN_DIRSEP)) != NULL)
path = (tmp + 1);
return path;
}
#define CHUNK_SIZE BUFSIZ
struct chunk {
size_t size;
struct chunk *next;
struct chunk *prev;
uint8_t data[];
};
/**
* Unload pointer returned by load().
*
* @param[in] data Pointer to unload.
*/
void unload(uint8_t *data)
{
struct chunk *chunk = ((struct chunk *)data - 1);
assert(chunk->next == chunk);
assert(chunk->prev == chunk);
free(chunk);
}
#ifdef HAVE_FTELLO
#define FTELL(f) ftello(f)
#define FSEEK(f, o, w) fseeko((f), (o), (w))
#define FOFFT off_t
#else
#define FTELL(f) ftell(f)
#define FSEEK(f, o, w) fseek((f), (o), (w))
#define FOFFT long
#endif
/**
* Call this when you're done with your file.
*
* @param[in,out] context Context returned by load().
*/
void load_finish(void **context)
{
#ifdef WITH_LIBARCHIVE
struct archive *archive = *context;
if (archive != NULL)
archive_read_free(archive);
#endif
*context = NULL;
}
/**
* Return the remaining file size from the current file offset.
*
* @param[in] file File pointer.
*/
static size_t load_size(FILE *file)
{
FOFFT old = FTELL(file);
FOFFT pos;
size_t ret = 0;
if ((old == (FOFFT)-1) ||
(FSEEK(file, 0, SEEK_END) == -1))
return 0;
if (((pos = FTELL(file)) != (FOFFT)-1) && (pos >= old))
ret = (size_t)(pos - old);
FSEEK(file, old, SEEK_SET);
return ret;
}
/**
* Allocate a buffer and stuff the file inside using transparent decompression
* if libarchive is available. If file_size is non-NULL, store the final size
* there. If max_size is nonzero, refuse to load anything larger.
* In case the returned value is NULL, errno should contain the error.
*
* If an error is returned but errno is 0, EOF has been reached.
*
* @param[in,out] context On first call of load() this should point to NULL.
* @param[out] file_size Final size.
* @param[in] file File pointer to load data from.
* @param max_size If nonzero, refuse to load anything larger.
* @return Buffer containing loaded data.
*/
uint8_t *load(void **context,
size_t *file_size, FILE *file, size_t max_size)
{
size_t pos;
size_t size = 0;
struct chunk *chunk;
struct chunk head = { 0, &head, &head };
size_t chunk_size = load_size(file);
int error = 0;
#ifdef WITH_LIBARCHIVE
struct archive *archive = *context;
struct archive_entry *archive_entry;
if (archive != NULL)
goto init_ok;
archive = archive_read_new();
*context = archive;
if (archive == NULL) {
error = ENOMEM;
goto error;
}
archive_read_support_filter_all(archive);
archive_read_support_format_all(archive);
archive_read_support_format_raw(archive);
if (archive_read_open_FILE(archive, file) != ARCHIVE_OK) {
error = EIO;
goto error;
}
init_ok:
switch (archive_read_next_header(archive, &archive_entry)) {
case ARCHIVE_OK:
break;
case ARCHIVE_EOF:
error = 0;
goto error;
default:
error = EIO;
goto error;
}
#else
*context = (void *)0xffff;
#endif
if (chunk_size == 0)
chunk_size = CHUNK_SIZE;
else if ((max_size != 0) && (chunk_size > max_size))
chunk_size = max_size;
while (1) {
pos = 0;
chunk = malloc(sizeof(*chunk) + chunk_size);
if (chunk == NULL) {
error = errno;
goto error;
}
chunk->size = chunk_size;
chunk->next = &head;
chunk->prev = head.prev;
chunk->prev->next = chunk;
head.prev = chunk;
do {
size_t i;
#ifdef WITH_LIBARCHIVE
ssize_t j;
j = archive_read_data(archive, &chunk->data[pos],
(chunk->size - pos));
/*
Don't bother with ARCHIVE_WARN and ARCHIVE_RETRY,
consider any negative value an error.
*/
if (j < 0) {
error = EIO;
goto error;
}
i = (size_t)j;
#else
i = fread(&chunk->data[pos], 1, (chunk->size - pos),
file);
#endif
if (i == 0) {
chunk->size = pos;
#ifndef WITH_LIBARCHIVE
if (ferror(file)) {
error = EIO;
goto error;
}
assert(feof(file));
#endif
goto process;
}
pos += i;
size += i;
if ((max_size != 0) && (size > max_size)) {
error = EFBIG;
goto error;
}
}
while (pos != chunk->size);
chunk_size = CHUNK_SIZE;
}
process:
chunk = realloc(head.next, (sizeof(*chunk) + size));
if (chunk == NULL) {
error = errno;
goto error;
}
chunk->next->prev = chunk;
head.next = chunk;
pos = chunk->size;
chunk->size = size;
chunk = chunk->next;
while (chunk != &head) {
struct chunk *next = chunk->next;
memcpy(&head.next->data[pos], chunk->data, chunk->size);
pos += chunk->size;
chunk->next->prev = chunk->prev;
chunk->prev->next = chunk->next;
free(chunk);
chunk = next;
}
chunk = head.next;
chunk->prev = chunk;
chunk->next = chunk;
if (file_size != NULL)
*file_size = chunk->size;
return chunk->data;
error:
#ifdef WITH_LIBARCHIVE
load_finish(context);
#endif
chunk = head.next;
while (chunk != &head) {
struct chunk *next = chunk->next;
free(chunk);
chunk = next;
}
errno = error;
return NULL;
}
/**
* Free NULL-terminated list of strings and set source pointer to NULL.
* This function can skip a given number of indices (starting from 0)
* which won't be freed.
*
* @param[in,out] pppc Pointer to an array of strings.
* @param skip Number of indices to skip in *pppc[].
*/
static void free_pppc(char ***pppc, size_t skip)
{
char **p = *pppc;
size_t i;
if (p == NULL)
return;
*pppc = NULL;
for (i = 0; (p[i] != NULL); ++i) {
if (skip == 0)
free(p[i]);
else
--skip;
}
free(p);
}
/**
* Return a list of path names that match "len" characters of "path" on the
* file system, or NULL if none was found or if an error occured.
*
* @param[in] path Path name to match.
* @param len Number of characters in "path" to match.
* @return List of matching path names or NULL.
*/
static char **complete_path_simple(const char *path, size_t len)
{
size_t rlen;
const char *cpl;
char *root;
struct dirent *dent;
DIR *dir;
char **ret = NULL;
size_t ret_size = 256;
size_t ret_used = 0;
struct stat st;
if ((rlen = strlen(path)) < len)
len = rlen;
cpl = path;
while (((root = strpbrk(cpl, DGEN_DIRSEP)) != NULL) &&
(root < (path + len)))
cpl = (root + 1);
rlen = (cpl - path);
len -= rlen;
if (rlen == 0) {
path = "." DGEN_DIRSEP;
rlen = 2;
}
if ((root = malloc(rlen + 1)) == NULL)
return NULL;
memcpy(root, path, rlen);
root[rlen] = '\0';
if (((dir = opendir(root)) == NULL) ||
((ret = malloc(sizeof(*ret) * ret_size)) == NULL))
goto error;
ret[(ret_used++)] = NULL;
while ((dent = readdir(dir)) != NULL) {
size_t i;
char *t;
if ((cpl[0] != '\0') && (strncmp(cpl, dent->d_name, len)))
continue;
/* Remove "." and ".." entries. */
if ((dent->d_name[0] == '.') &&
((dent->d_name[1] == '\0') ||
((dent->d_name[1] == '.') && (dent->d_name[2] == '\0'))))
continue;
if (ret_used == ret_size) {
char **rt;
ret_size *= 2;
if ((rt = realloc(ret,
(sizeof(*rt) * ret_size))) == NULL)
break;
ret = rt;
}
i = strlen(dent->d_name);
/* Allocate one extra char in case it's a directory. */
if ((t = malloc(rlen + i + 1 + 1)) == NULL)
break;
memcpy(t, root, rlen);
memcpy(&t[rlen], dent->d_name, i);
t[(rlen + i)] = '\0';
if ((stat(t, &st) != -1) && (S_ISDIR(st.st_mode))) {
t[(rlen + (i++))] = DGEN_DIRSEP[0];
t[(rlen + i)] = '\0';
}
for (i = 0; (ret[i] != NULL); ++i)
if (strcmp(dent->d_name, &ret[i][rlen]) < 0)
break;
memmove(&ret[(i + 1)], &ret[i],
(sizeof(*ret) * (ret_used - i)));
ret[i] = t;
++ret_used;
}
closedir(dir);
free(root);
if (ret[0] != NULL)
return ret;
free(ret);
return NULL;
error:
if (dir != NULL)
closedir(dir);
free(root);
if (ret != NULL) {
while (*ret != NULL)
free(*(ret++));
free(ret);
}
return NULL;
}
#if defined(HAVE_GLOB_H) && !defined(__MINGW32__)
#define COMPLETE_USERDIR_TILDE 0x01
#define COMPLETE_USERDIR_EXACT 0x02
#define COMPLETE_USERDIR_ALL 0x04
/**
* Return the list of home directories that match "len" characters of a
* user's name ("prefix").
* COMPLETE_USERDIR_TILDE - Instead of directories, the returned strings are
* tilde-prefixed user names.
* COMPLETE_USERDIR_EXACT - Prefix must exactly match a user name.
* COMPLETE_USERDIR_ALL - When prefix length is 0, return all user names
* instead of the current user only.
*
* @param[in] prefix Path name to match.
* @param len Number of characters to match in "path".
* @return List of home directories that match "len" characters of "prefix".
*/
static char **complete_userdir(const char *prefix, size_t len, int flags)
{
char **ret = NULL;
char *s;
struct passwd *pwd;
size_t n;
size_t i;
int tilde = !!(flags & COMPLETE_USERDIR_TILDE);
int exact = !!(flags & COMPLETE_USERDIR_EXACT);
int all = !!(flags & COMPLETE_USERDIR_ALL);
setpwent();
if ((!all) && (len == 0)) {
if (((pwd = getpwuid(geteuid())) == NULL) ||
((ret = calloc(2, sizeof(ret[0]))) == NULL))
goto err;
if (tilde)
s = pwd->pw_name;
else
s = pwd->pw_dir;
i = strlen(s);
if ((ret[0] = calloc((tilde + i + 1),
sizeof(*ret[0]))) == NULL)
goto err;
if (tilde)
ret[0][0] = '~';
memcpy(&ret[0][tilde], s, i);
ret[0][(tilde + i)] = '\0';
goto end;
}
n = 64;
if ((ret = calloc(n, sizeof(ret[0]))) == NULL)
goto err;
i = 0;
while ((pwd = getpwent()) != NULL) {
size_t j;
if (exact) {
if (strncmp(pwd->pw_name, prefix,
strlen(pwd->pw_name)))
continue;
}
else if (strncmp(pwd->pw_name, prefix, len))
continue;
if (i == (n - 1)) {
char **tmp;
n += 64;
if ((tmp = realloc(ret, (sizeof(ret[0]) * n))) == NULL)
goto end;
ret = tmp;
}
if (tilde)
s = pwd->pw_name;
else
s = pwd->pw_dir;
j = strlen(s);
if ((ret[i] = calloc((tilde + j + 1),
sizeof(*ret[0]))) == NULL)
break;
if (tilde)
ret[i][0] = '~';
memcpy(&ret[i][tilde], s, j);
ret[i][(tilde + j)] = '\0';
++i;
}
if (i == 0) {
free(ret);
ret = NULL;
}
end:
endpwent();
return ret;
err:
endpwent();
free_pppc(&ret, 0);
return NULL;
}
/**
* Return a list of pathnames that match "len" characters of "prefix" on the
* file system, or NULL if none was found or if an error occured. This is done
* using glob() in order to handle wildcard characters in "prefix".
*
* When "prefix" isn't explicitly relative nor absolute, if "relative" is
* non-NULL, then the path will be completed as if "prefix" was a subdirectory
* of "relative". If "relative" is NULL, DGen's home directory will be used.
*
* If "relative" isn't explicitly relative nor absolute, it will be considered
* a subdirectory of DGen's home directory.
*
* @param[in] prefix Path name to match.
* @param len Number of characters to match in "path".
* @param[in] relative If non-NULL, consider path relative to this.
* @return List of path names that match "len" characters of "prefix".
*/
char **complete_path(const char *prefix, size_t len, const char *relative)
{
char *s;
char **ret;
size_t i;
glob_t g;
size_t strip;
(void)complete_path_simple; /* unused */
if ((i = strlen(prefix)) < len)
len = i;
else
i = len;
if (((s = strchr(prefix, '/')) != NULL) && ((i = (s - prefix)) > len))
i = len;
if ((len == 0) ||
((prefix[0] != '~') &&
(strncmp(prefix, ".", i)) &&
(strncmp(prefix, "..", i)))) {
size_t n;
if ((relative == NULL) ||
(path_type(relative, ~0u) == PATH_TYPE_UNSPECIFIED)) {
char *x = dgen_dir(NULL, &n, relative);
if ((x == NULL) ||
((s = realloc(x, (n + 1 + len + 2))) == NULL)) {
free(x);
return NULL;
}
}
else {
n = strlen(relative);
if ((s = malloc(n + 1 + len + 2)) == NULL)
return NULL;
memcpy(s, relative, n);
}
s[(n++)] = '/';
strip = n;
memcpy(&s[n], prefix, len);
len += n;
s[(len++)] = '*';
s[len] = '\0';
}
else if (prefix[0] == '~') {
char **ud;
size_t n;
if (s == NULL)
return complete_userdir(&prefix[1], (i - 1),
(COMPLETE_USERDIR_TILDE |
COMPLETE_USERDIR_ALL));
ud = complete_userdir(&prefix[1], (i - 1),
COMPLETE_USERDIR_EXACT);
if (ud == NULL)
goto no_userdir;
n = strlen(ud[0]);
if ((s = realloc(ud[0], (n + (len - i) + 2))) == NULL) {
free_pppc(&ud, 0);
goto no_userdir;
}
free_pppc(&ud, 1);
len -= i;
strip = 0;
memcpy(&s[n], &prefix[i], len);
len += n;
s[(len++)] = '*';
s[len] = '\0';
}
else {
no_userdir:
if ((s = malloc(len + 2)) == NULL)
return NULL;
memcpy(s, prefix, len);
s[(len++)] = '*';
s[len] = '\0';
strip = 0;
}
switch (glob(s, (GLOB_MARK | GLOB_NOESCAPE), NULL, &g)) {
case 0:
break;
case GLOB_NOSPACE:
case GLOB_ABORTED:
case GLOB_NOMATCH:
default:
free(s);
return NULL;
}
free(s);
if ((ret = calloc((g.gl_pathc + 1), sizeof(ret[0]))) == NULL)
goto err;
for (i = 0; (g.gl_pathv[i] != NULL); ++i) {
size_t j;
len = strlen(g.gl_pathv[i]);
if (strip > len)
break;
j = (len - strip);
if ((ret[i] = calloc((j + 1), sizeof(ret[i][0]))) == NULL)
break;
memcpy(ret[i], &(g.gl_pathv[i][strip]), j);
ret[i][j] = '\0';
}
if (i == 0)
goto err;
globfree(&g);
return ret;
err:
globfree(&g);