From 33cc3b9dd7bf3dae1c6cf86e46bb4923f96e7fff Mon Sep 17 00:00:00 2001 From: トトも <85485984+ElectronicsArchiver@users.noreply.github.com> Date: Sat, 16 Apr 2022 20:18:56 +0200 Subject: Source / Include Folder (#88) Moved Source Files Into `src` Folder --- util.c | 510 ----------------------------------------------------------------- 1 file changed, 510 deletions(-) delete mode 100644 util.c (limited to 'util.c') diff --git a/util.c b/util.c deleted file mode 100644 index a62e66c..0000000 --- a/util.c +++ /dev/null @@ -1,510 +0,0 @@ -/**************************************************************************** - * bfs * - * Copyright (C) 2016-2022 Tavian Barnes * - * * - * Permission to use, copy, modify, and/or distribute this software for any * - * purpose with or without fee is hereby granted. * - * * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * - ****************************************************************************/ - -#include "util.h" -#include "dstring.h" -#include "xregex.h" -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#if BFS_HAS_SYS_PARAM -# include -#endif - -#if BFS_HAS_SYS_SYSMACROS -# include -#elif BFS_HAS_SYS_MKDEV -# include -#endif - -#if BFS_HAS_UTIL -# include -#endif - -char *xreadlinkat(int fd, const char *path, size_t size) { - ssize_t len; - char *name = NULL; - - if (size == 0) { - size = 64; - } else { - ++size; // NUL terminator - } - - while (true) { - char *new_name = realloc(name, size); - if (!new_name) { - goto error; - } - name = new_name; - - len = readlinkat(fd, path, name, size); - if (len < 0) { - goto error; - } else if ((size_t)len >= size) { - size *= 2; - } else { - break; - } - } - - name[len] = '\0'; - return name; - -error: - free(name); - return NULL; -} - -int dup_cloexec(int fd) { -#ifdef F_DUPFD_CLOEXEC - return fcntl(fd, F_DUPFD_CLOEXEC, 0); -#else - int ret = dup(fd); - if (ret < 0) { - return -1; - } - - if (fcntl(ret, F_SETFD, FD_CLOEXEC) == -1) { - close_quietly(ret); - return -1; - } - - return ret; -#endif -} - -int pipe_cloexec(int pipefd[2]) { -#if __linux__ || (BSD && !__APPLE__) - return pipe2(pipefd, O_CLOEXEC); -#else - if (pipe(pipefd) != 0) { - return -1; - } - - if (fcntl(pipefd[0], F_SETFD, FD_CLOEXEC) == -1 || fcntl(pipefd[1], F_SETFD, FD_CLOEXEC) == -1) { - close_quietly(pipefd[1]); - close_quietly(pipefd[0]); - return -1; - } - - return 0; -#endif -} - -/** Get the single character describing the given file type. */ -static char type_char(mode_t mode) { - switch (mode & S_IFMT) { - case S_IFREG: - return '-'; - case S_IFBLK: - return 'b'; - case S_IFCHR: - return 'c'; - case S_IFDIR: - return 'd'; - case S_IFLNK: - return 'l'; - case S_IFIFO: - return 'p'; - case S_IFSOCK: - return 's'; -#ifdef S_IFDOOR - case S_IFDOOR: - return 'D'; -#endif -#ifdef S_IFPORT - case S_IFPORT: - return 'P'; -#endif -#ifdef S_IFWHT - case S_IFWHT: - return 'w'; -#endif - } - - return '?'; -} - -void xstrmode(mode_t mode, char str[11]) { - strcpy(str, "----------"); - - str[0] = type_char(mode); - - if (mode & 00400) { - str[1] = 'r'; - } - if (mode & 00200) { - str[2] = 'w'; - } - if ((mode & 04100) == 04000) { - str[3] = 'S'; - } else if (mode & 04000) { - str[3] = 's'; - } else if (mode & 00100) { - str[3] = 'x'; - } - - if (mode & 00040) { - str[4] = 'r'; - } - if (mode & 00020) { - str[5] = 'w'; - } - if ((mode & 02010) == 02000) { - str[6] = 'S'; - } else if (mode & 02000) { - str[6] = 's'; - } else if (mode & 00010) { - str[6] = 'x'; - } - - if (mode & 00004) { - str[7] = 'r'; - } - if (mode & 00002) { - str[8] = 'w'; - } - if ((mode & 01001) == 01000) { - str[9] = 'T'; - } else if (mode & 01000) { - str[9] = 't'; - } else if (mode & 00001) { - str[9] = 'x'; - } -} - -const char *xbasename(const char *path) { - const char *i; - - // Skip trailing slashes - for (i = path + strlen(path); i > path && i[-1] == '/'; --i); - - // Find the beginning of the name - for (; i > path && i[-1] != '/'; --i); - - // Skip leading slashes - for (; i[0] == '/' && i[1]; ++i); - - return i; -} - -int xfaccessat(int fd, const char *path, int amode) { - int ret = faccessat(fd, path, amode, 0); - -#ifdef AT_EACCESS - // Some platforms, like Hurd, only support AT_EACCESS. Other platforms, - // like Android, don't support AT_EACCESS at all. - if (ret != 0 && (errno == EINVAL || errno == ENOTSUP)) { - ret = faccessat(fd, path, amode, AT_EACCESS); - } -#endif - - return ret; -} - -int xstrtofflags(const char **str, unsigned long long *set, unsigned long long *clear) { -#if BSD && !__GNU__ - char *str_arg = (char *)*str; - unsigned long set_arg = 0; - unsigned long clear_arg = 0; - -#if __NetBSD__ - int ret = string_to_flags(&str_arg, &set_arg, &clear_arg); -#else - int ret = strtofflags(&str_arg, &set_arg, &clear_arg); -#endif - - *str = str_arg; - *set = set_arg; - *clear = clear_arg; - - if (ret != 0) { - errno = EINVAL; - } - return ret; -#else // !BSD - errno = ENOTSUP; - return -1; -#endif -} - -size_t xstrwidth(const char *str) { - size_t len = strlen(str); - size_t ret = 0; - - mbstate_t mb; - memset(&mb, 0, sizeof(mb)); - - while (len > 0) { - wchar_t wc; - size_t mblen = mbrtowc(&wc, str, len, &mb); - int cwidth; - if (mblen == (size_t)-1) { - // Invalid byte sequence, assume a single-width '?' - mblen = 1; - cwidth = 1; - memset(&mb, 0, sizeof(mb)); - } else if (mblen == (size_t)-2) { - // Incomplete byte sequence, assume a single-width '?' - mblen = len; - cwidth = 1; - } else { - cwidth = wcwidth(wc); - if (cwidth < 0) { - cwidth = 0; - } - } - - str += mblen; - len -= mblen; - ret += cwidth; - } - - return ret; -} - -bool is_nonexistence_error(int error) { - return error == ENOENT || errno == ENOTDIR; -} - -/** Compile and execute a regular expression for xrpmatch(). */ -static int xrpregex(nl_item item, const char *response) { - const char *pattern = nl_langinfo(item); - if (!pattern) { - return -1; - } - - struct bfs_regex *regex; - int ret = bfs_regcomp(®ex, pattern, BFS_REGEX_POSIX_EXTENDED, 0); - if (ret == 0) { - ret = bfs_regexec(regex, response, 0); - } - - bfs_regfree(regex); - return ret; -} - -/** Check if a response is affirmative or negative. */ -static int xrpmatch(const char *response) { - int ret = xrpregex(NOEXPR, response); - if (ret > 0) { - return 0; - } else if (ret < 0) { - return -1; - } - - ret = xrpregex(YESEXPR, response); - if (ret > 0) { - return 1; - } else if (ret < 0) { - return -1; - } - - // Failsafe: always handle y/n - char c = response[0]; - if (c == 'n' || c == 'N') { - return 0; - } else if (c == 'y' || c == 'Y') { - return 1; - } else { - return -1; - } -} - -int ynprompt(void) { - fflush(stderr); - - char *line = xgetdelim(stdin, '\n'); - int ret = line ? xrpmatch(line) : -1; - free(line); - return ret; -} - -dev_t bfs_makedev(int ma, int mi) { -#ifdef makedev - return makedev(ma, mi); -#else - return (ma << 8) | mi; -#endif -} - -int bfs_major(dev_t dev) { -#ifdef major - return major(dev); -#else - return dev >> 8; -#endif -} - -int bfs_minor(dev_t dev) { -#ifdef minor - return minor(dev); -#else - return dev & 0xFF; -#endif -} - -size_t xread(int fd, void *buf, size_t nbytes) { - size_t count = 0; - - while (count < nbytes) { - ssize_t ret = read(fd, (char *)buf + count, nbytes - count); - if (ret < 0) { - if (errno == EINTR) { - continue; - } else { - break; - } - } else if (ret == 0) { - // EOF - errno = 0; - break; - } else { - count += ret; - } - } - - return count; -} - -size_t xwrite(int fd, const void *buf, size_t nbytes) { - size_t count = 0; - - while (count < nbytes) { - ssize_t ret = write(fd, (const char *)buf + count, nbytes - count); - if (ret < 0) { - if (errno == EINTR) { - continue; - } else { - break; - } - } else if (ret == 0) { - // EOF? - errno = 0; - break; - } else { - count += ret; - } - } - - return count; -} - -char *xconfstr(int name) { - size_t len = confstr(name, NULL, 0); - if (len == 0) { - return NULL; - } - - char *str = malloc(len); - if (!str) { - return NULL; - } - - if (confstr(name, str, len) != len) { - free(str); - return NULL; - } - - return str; -} - -char *xgetdelim(FILE *file, char delim) { - char *chunk = NULL; - size_t n = 0; - ssize_t len = getdelim(&chunk, &n, delim, file); - if (len >= 0) { - if (chunk[len] == delim) { - chunk[len] = '\0'; - } - return chunk; - } else { - free(chunk); - if (!ferror(file)) { - errno = 0; - } - return NULL; - } -} - -FILE *xfopen(const char *path, int flags) { - char mode[4]; - - switch (flags & O_ACCMODE) { - case O_RDONLY: - strcpy(mode, "rb"); - break; - case O_WRONLY: - strcpy(mode, "wb"); - break; - case O_RDWR: - strcpy(mode, "r+b"); - break; - default: - assert(!"Invalid access mode"); - errno = EINVAL; - return NULL; - } - - if (flags & O_APPEND) { - mode[0] = 'a'; - } - - int fd; - if (flags & O_CREAT) { - fd = open(path, flags, 0666); - } else { - fd = open(path, flags); - } - - if (fd < 0) { - return NULL; - } - - FILE *ret = fdopen(fd, mode); - if (!ret) { - close_quietly(fd); - return NULL; - } - - return ret; -} - -int xclose(int fd) { - int ret = close(fd); - if (ret != 0) { - assert(errno != EBADF); - } - return ret; -} - -void close_quietly(int fd) { - int error = errno; - xclose(fd); - errno = error; -} -- cgit v1.2.3