bfstd: Rename from util and reorganize it

1 files changed, 0 insertions, 512 deletions

diff --git a/src/util.c b/src/util.c
deleted file mode 100644
index da54040..0000000
--- a/src/util.c
+++ /dev/null
@@ -1,512 +0,0 @@
-/****************************************************************************
- * bfs                                                                      *
- * Copyright (C) 2016-2022 Tavian Barnes <tavianator@tavianator.com>        *
- *                                                                          *
- * 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 "config.h"
-#include "dstring.h"
-#include "xregex.h"
-#include <assert.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <langinfo.h>
-#include <nl_types.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <wchar.h>
-
-#if BFS_USE_SYS_SYSMACROS_H
-#	include <sys/sysmacros.h>
-#elif BFS_USE_SYS_MKDEV_H
-#	include <sys/mkdev.h>
-#endif
-
-#if BFS_USE_UTIL_H
-#	include <util.h>
-#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(&regex, 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) {
-#if __ANDROID__
-	errno = ENOTSUP;
-	return NULL;
-#else
-	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;
-#endif // !__ANDROID__
-}
-
-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;
-}