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-rw-r--r--src/util.c512
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;
-}
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