mirror of
https://github.com/fish-shell/fish-shell.git
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463 lines
9.6 KiB
C++
463 lines
9.6 KiB
C++
/** \file wutil.c
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Wide character equivalents of various standard unix
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functions.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <wchar.h>
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#include <wctype.h>
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#include <string.h>
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#include <dirent.h>
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#include <stdarg.h>
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#include <limits.h>
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#include <libgen.h>
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#include <pthread.h>
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#include <string>
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#include <map>
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#if HAVE_LIBINTL_H
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#include <libintl.h>
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#endif
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#include "fallback.h"
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#include "util.h"
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#include "common.h"
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#include "wutil.h"
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typedef std::string cstring;
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/**
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Minimum length of the internal covnersion buffers
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*/
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#define TMP_LEN_MIN 256
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#ifndef PATH_MAX
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#ifdef MAXPATHLEN
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#define PATH_MAX MAXPATHLEN
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#else
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/**
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Fallback length of MAXPATHLEN. Just a hopefully sane value...
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*/
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#define PATH_MAX 4096
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#endif
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#endif
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/* Lock to protect wgettext */
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static pthread_mutex_t wgettext_lock;
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/* Maps string keys to (immortal) pointers to string values */
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typedef std::map<wcstring, wcstring *> wgettext_map_t;
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static std::map<wcstring, wcstring *> wgettext_map;
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void wutil_init()
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{
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}
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void wutil_destroy()
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{
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}
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bool wreaddir_resolving(DIR *dir, const std::wstring &dir_path, std::wstring &out_name, bool *out_is_dir)
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{
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struct dirent *d = readdir(dir);
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if (!d) return false;
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out_name = str2wcstring(d->d_name);
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if (out_is_dir)
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{
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/* The caller cares if this is a directory, so check */
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bool is_dir;
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if (d->d_type == DT_DIR)
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{
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is_dir = true;
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}
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else if (d->d_type == DT_LNK || d->d_type == DT_UNKNOWN)
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{
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/* We want to treat symlinks to directories as directories. Use stat to resolve it. */
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cstring fullpath = wcs2string(dir_path);
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fullpath.push_back('/');
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fullpath.append(d->d_name);
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struct stat buf;
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if (stat(fullpath.c_str(), &buf) != 0)
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{
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is_dir = false;
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}
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else
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{
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is_dir = !!(S_ISDIR(buf.st_mode));
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}
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}
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else
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{
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is_dir = false;
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}
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*out_is_dir = is_dir;
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}
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return true;
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}
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bool wreaddir(DIR *dir, std::wstring &out_name)
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{
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struct dirent *d = readdir(dir);
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if (!d) return false;
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out_name = str2wcstring(d->d_name);
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return true;
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}
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wchar_t *wgetcwd(wchar_t *buff, size_t sz)
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{
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char *buffc = (char *)malloc(sz*MAX_UTF8_BYTES);
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char *res;
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wchar_t *ret = 0;
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if (!buffc)
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{
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errno = ENOMEM;
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return 0;
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}
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res = getcwd(buffc, sz*MAX_UTF8_BYTES);
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if (res)
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{
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if ((size_t)-1 != mbstowcs(buff, buffc, sizeof(wchar_t) * sz))
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{
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ret = buff;
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}
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}
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free(buffc);
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return ret;
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}
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int wchdir(const wcstring &dir)
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{
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cstring tmp = wcs2string(dir);
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return chdir(tmp.c_str());
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}
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FILE *wfopen(const wcstring &path, const char *mode)
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{
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int permissions = 0, options = 0;
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size_t idx = 0;
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switch (mode[idx++])
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{
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case 'r':
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permissions = O_RDONLY;
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break;
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case 'w':
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permissions = O_WRONLY;
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options = O_CREAT | O_TRUNC;
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break;
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case 'a':
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permissions = O_WRONLY;
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options = O_CREAT | O_APPEND;
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break;
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default:
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errno = EINVAL;
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return NULL;
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break;
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}
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/* Skip binary */
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if (mode[idx] == 'b')
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idx++;
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/* Consider append option */
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if (mode[idx] == '+')
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permissions = O_RDWR;
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int fd = wopen_cloexec(path, permissions | options, 0666);
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if (fd < 0)
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return NULL;
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FILE *result = fdopen(fd, mode);
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if (result == NULL)
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close(fd);
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return result;
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}
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FILE *wfreopen(const wcstring &path, const char *mode, FILE *stream)
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{
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cstring tmp = wcs2string(path);
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return freopen(tmp.c_str(), mode, stream);
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}
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bool set_cloexec(int fd)
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{
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int flags = fcntl(fd, F_GETFD, 0);
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if (flags < 0)
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{
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return false;
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}
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else if (flags & FD_CLOEXEC)
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{
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return true;
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}
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else
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{
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return fcntl(fd, F_SETFD, flags | FD_CLOEXEC) >= 0;
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}
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}
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static int wopen_internal(const wcstring &pathname, int flags, mode_t mode, bool cloexec)
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{
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ASSERT_IS_NOT_FORKED_CHILD();
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cstring tmp = wcs2string(pathname);
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/* Prefer to use O_CLOEXEC. It has to both be defined and nonzero */
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#ifdef O_CLOEXEC
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if (cloexec && O_CLOEXEC)
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{
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flags |= O_CLOEXEC;
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cloexec = false;
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}
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#endif
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int fd = ::open(tmp.c_str(), flags, mode);
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if (cloexec && fd >= 0 && ! set_cloexec(fd))
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{
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close(fd);
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fd = -1;
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}
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return fd;
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}
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int wopen(const wcstring &pathname, int flags, mode_t mode)
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{
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// off the main thread, always use wopen_cloexec
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ASSERT_IS_MAIN_THREAD();
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ASSERT_IS_NOT_FORKED_CHILD();
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return wopen_internal(pathname, flags, mode, false);
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}
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int wopen_cloexec(const wcstring &pathname, int flags, mode_t mode)
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{
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return wopen_internal(pathname, flags, mode, true);
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}
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int wcreat(const wcstring &pathname, mode_t mode)
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{
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cstring tmp = wcs2string(pathname);
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return creat(tmp.c_str(), mode);
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}
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DIR *wopendir(const wcstring &name)
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{
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cstring tmp = wcs2string(name);
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return opendir(tmp.c_str());
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}
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int wstat(const wcstring &file_name, struct stat *buf)
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{
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cstring tmp = wcs2string(file_name);
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return stat(tmp.c_str(), buf);
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}
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int lwstat(const wcstring &file_name, struct stat *buf)
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{
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// fprintf(stderr, "%s\n", __PRETTY_FUNCTION__);
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cstring tmp = wcs2string(file_name);
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return lstat(tmp.c_str(), buf);
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}
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int waccess(const wcstring &file_name, int mode)
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{
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cstring tmp = wcs2string(file_name);
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return access(tmp.c_str(), mode);
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}
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int wunlink(const wcstring &file_name)
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{
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cstring tmp = wcs2string(file_name);
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return unlink(tmp.c_str());
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}
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void wperror(const wcstring &s)
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{
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int e = errno;
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if (!s.empty())
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{
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fwprintf(stderr, L"%ls: ", s.c_str());
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}
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fwprintf(stderr, L"%s\n", strerror(e));
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}
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#ifdef HAVE_REALPATH_NULL
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wchar_t *wrealpath(const wcstring &pathname, wchar_t *resolved_path)
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{
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cstring tmp = wcs2string(pathname);
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char *narrow_res = realpath(tmp.c_str(), 0);
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wchar_t *res;
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if (!narrow_res)
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return 0;
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if (resolved_path)
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{
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wchar_t *tmp2 = str2wcs(narrow_res);
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wcslcpy(resolved_path, tmp2, PATH_MAX);
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free(tmp2);
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res = resolved_path;
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}
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else
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{
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res = str2wcs(narrow_res);
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}
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free(narrow_res);
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return res;
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}
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#else
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wchar_t *wrealpath(const wcstring &pathname, wchar_t *resolved_path)
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{
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cstring tmp = wcs2string(pathname);
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char narrow_buff[PATH_MAX];
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char *narrow_res = realpath(tmp.c_str(), narrow_buff);
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wchar_t *res;
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if (!narrow_res)
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return 0;
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if (resolved_path)
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{
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wchar_t *tmp2 = str2wcs(narrow_res);
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wcslcpy(resolved_path, tmp2, PATH_MAX);
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free(tmp2);
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res = resolved_path;
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}
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else
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{
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res = str2wcs(narrow_res);
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}
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return res;
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}
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#endif
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wcstring wdirname(const wcstring &path)
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{
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char *tmp = wcs2str(path.c_str());
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char *narrow_res = dirname(tmp);
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wcstring result = format_string(L"%s", narrow_res);
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free(tmp);
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return result;
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}
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wcstring wbasename(const wcstring &path)
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{
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char *tmp = wcs2str(path.c_str());
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char *narrow_res = basename(tmp);
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wcstring result = format_string(L"%s", narrow_res);
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free(tmp);
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return result;
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}
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/* Really init wgettext */
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static void wgettext_really_init()
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{
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pthread_mutex_init(&wgettext_lock, NULL);
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bindtextdomain(PACKAGE_NAME, LOCALEDIR);
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textdomain(PACKAGE_NAME);
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}
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/**
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For wgettext: Internal init function. Automatically called when a translation is first requested.
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*/
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static void wgettext_init_if_necessary()
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{
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static pthread_once_t once = PTHREAD_ONCE_INIT;
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pthread_once(&once, wgettext_really_init);
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}
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const wchar_t *wgettext(const wchar_t *in)
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{
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if (!in)
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return in;
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// preserve errno across this since this is often used in printing error messages
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int err = errno;
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wgettext_init_if_necessary();
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wcstring key = in;
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scoped_lock lock(wgettext_lock);
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wcstring *& val = wgettext_map[key];
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if (val == NULL)
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{
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cstring mbs_in = wcs2string(key);
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char *out = gettext(mbs_in.c_str());
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val = new wcstring(format_string(L"%s", out));
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}
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errno = err;
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return val->c_str();
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}
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wcstring wgettext2(const wcstring &in)
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{
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wgettext_init_if_necessary();
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std::string mbs_in = wcs2string(in);
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char *out = gettext(mbs_in.c_str());
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wcstring result = format_string(L"%s", out);
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return result;
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}
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const wchar_t *wgetenv(const wcstring &name)
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{
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ASSERT_IS_MAIN_THREAD();
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cstring name_narrow = wcs2string(name);
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char *res_narrow = getenv(name_narrow.c_str());
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static wcstring out;
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if (!res_narrow)
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return 0;
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out = format_string(L"%s", res_narrow);
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return out.c_str();
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}
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int wmkdir(const wcstring &name, int mode)
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{
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cstring name_narrow = wcs2string(name);
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return mkdir(name_narrow.c_str(), mode);
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}
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int wrename(const wcstring &old, const wcstring &newv)
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{
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cstring old_narrow = wcs2string(old);
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cstring new_narrow =wcs2string(newv);
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return rename(old_narrow.c_str(), new_narrow.c_str());
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}
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int fish_wcstoi(const wchar_t *str, wchar_t ** endptr, int base)
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{
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long ret = wcstol(str, endptr, base);
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if (ret > INT_MAX)
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{
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ret = INT_MAX;
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errno = ERANGE;
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}
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else if (ret < INT_MIN)
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{
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ret = INT_MIN;
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errno = ERANGE;
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}
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return (int)ret;
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}
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