| /* |
| * Converts filenames from decomposed unicode into precomposed unicode. |
| * Used on MacOS X. |
| */ |
| |
| #define PRECOMPOSE_UNICODE_C |
| |
| #include "cache.h" |
| #include "utf8.h" |
| #include "precompose_utf8.h" |
| |
| typedef char *iconv_ibp; |
| static const char *repo_encoding = "UTF-8"; |
| static const char *path_encoding = "UTF-8-MAC"; |
| |
| static size_t has_non_ascii(const char *s, size_t maxlen, size_t *strlen_c) |
| { |
| const uint8_t *ptr = (const uint8_t *)s; |
| size_t strlen_chars = 0; |
| size_t ret = 0; |
| |
| if (!ptr || !*ptr) |
| return 0; |
| |
| while (*ptr && maxlen) { |
| if (*ptr & 0x80) |
| ret++; |
| strlen_chars++; |
| ptr++; |
| maxlen--; |
| } |
| if (strlen_c) |
| *strlen_c = strlen_chars; |
| |
| return ret; |
| } |
| |
| |
| void probe_utf8_pathname_composition(void) |
| { |
| struct strbuf path = STRBUF_INIT; |
| static const char *auml_nfc = "\xc3\xa4"; |
| static const char *auml_nfd = "\x61\xcc\x88"; |
| int output_fd; |
| if (precomposed_unicode != -1) |
| return; /* We found it defined in the global config, respect it */ |
| git_path_buf(&path, "%s", auml_nfc); |
| output_fd = open(path.buf, O_CREAT|O_EXCL|O_RDWR, 0600); |
| if (output_fd >= 0) { |
| close(output_fd); |
| git_path_buf(&path, "%s", auml_nfd); |
| precomposed_unicode = access(path.buf, R_OK) ? 0 : 1; |
| git_config_set("core.precomposeunicode", |
| precomposed_unicode ? "true" : "false"); |
| git_path_buf(&path, "%s", auml_nfc); |
| if (unlink(path.buf)) |
| die_errno(_("failed to unlink '%s'"), path.buf); |
| } |
| strbuf_release(&path); |
| } |
| |
| |
| void precompose_argv(int argc, const char **argv) |
| { |
| int i = 0; |
| const char *oldarg; |
| char *newarg; |
| iconv_t ic_precompose; |
| |
| if (precomposed_unicode != 1) |
| return; |
| |
| ic_precompose = iconv_open(repo_encoding, path_encoding); |
| if (ic_precompose == (iconv_t) -1) |
| return; |
| |
| while (i < argc) { |
| size_t namelen; |
| oldarg = argv[i]; |
| if (has_non_ascii(oldarg, (size_t)-1, &namelen)) { |
| newarg = reencode_string_iconv(oldarg, namelen, ic_precompose, NULL); |
| if (newarg) |
| argv[i] = newarg; |
| } |
| i++; |
| } |
| iconv_close(ic_precompose); |
| } |
| |
| |
| PREC_DIR *precompose_utf8_opendir(const char *dirname) |
| { |
| PREC_DIR *prec_dir = xmalloc(sizeof(PREC_DIR)); |
| prec_dir->dirent_nfc = xmalloc(sizeof(dirent_prec_psx)); |
| prec_dir->dirent_nfc->max_name_len = sizeof(prec_dir->dirent_nfc->d_name); |
| |
| prec_dir->dirp = opendir(dirname); |
| if (!prec_dir->dirp) { |
| free(prec_dir->dirent_nfc); |
| free(prec_dir); |
| return NULL; |
| } else { |
| int ret_errno = errno; |
| prec_dir->ic_precompose = iconv_open(repo_encoding, path_encoding); |
| /* if iconv_open() fails, die() in readdir() if needed */ |
| errno = ret_errno; |
| } |
| |
| return prec_dir; |
| } |
| |
| struct dirent_prec_psx *precompose_utf8_readdir(PREC_DIR *prec_dir) |
| { |
| struct dirent *res; |
| res = readdir(prec_dir->dirp); |
| if (res) { |
| size_t namelenz = strlen(res->d_name) + 1; /* \0 */ |
| size_t new_maxlen = namelenz; |
| |
| int ret_errno = errno; |
| |
| if (new_maxlen > prec_dir->dirent_nfc->max_name_len) { |
| size_t new_len = sizeof(dirent_prec_psx) + new_maxlen - |
| sizeof(prec_dir->dirent_nfc->d_name); |
| |
| prec_dir->dirent_nfc = xrealloc(prec_dir->dirent_nfc, new_len); |
| prec_dir->dirent_nfc->max_name_len = new_maxlen; |
| } |
| |
| prec_dir->dirent_nfc->d_ino = res->d_ino; |
| prec_dir->dirent_nfc->d_type = res->d_type; |
| |
| if ((precomposed_unicode == 1) && has_non_ascii(res->d_name, (size_t)-1, NULL)) { |
| if (prec_dir->ic_precompose == (iconv_t)-1) { |
| die("iconv_open(%s,%s) failed, but needed:\n" |
| " precomposed unicode is not supported.\n" |
| " If you want to use decomposed unicode, run\n" |
| " \"git config core.precomposeunicode false\"\n", |
| repo_encoding, path_encoding); |
| } else { |
| iconv_ibp cp = (iconv_ibp)res->d_name; |
| size_t inleft = namelenz; |
| char *outpos = &prec_dir->dirent_nfc->d_name[0]; |
| size_t outsz = prec_dir->dirent_nfc->max_name_len; |
| errno = 0; |
| iconv(prec_dir->ic_precompose, &cp, &inleft, &outpos, &outsz); |
| if (errno || inleft) { |
| /* |
| * iconv() failed and errno could be E2BIG, EILSEQ, EINVAL, EBADF |
| * MacOS X avoids illegal byte sequences. |
| * If they occur on a mounted drive (e.g. NFS) it is not worth to |
| * die() for that, but rather let the user see the original name |
| */ |
| namelenz = 0; /* trigger strlcpy */ |
| } |
| } |
| } else |
| namelenz = 0; |
| |
| if (!namelenz) |
| strlcpy(prec_dir->dirent_nfc->d_name, res->d_name, |
| prec_dir->dirent_nfc->max_name_len); |
| |
| errno = ret_errno; |
| return prec_dir->dirent_nfc; |
| } |
| return NULL; |
| } |
| |
| |
| int precompose_utf8_closedir(PREC_DIR *prec_dir) |
| { |
| int ret_value; |
| int ret_errno; |
| ret_value = closedir(prec_dir->dirp); |
| ret_errno = errno; |
| if (prec_dir->ic_precompose != (iconv_t)-1) |
| iconv_close(prec_dir->ic_precompose); |
| free(prec_dir->dirent_nfc); |
| free(prec_dir); |
| errno = ret_errno; |
| return ret_value; |
| } |