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Diffstat (limited to 'lib/mlibc/options/posix/generic/wordexp-stubs.cpp')
-rw-r--r--lib/mlibc/options/posix/generic/wordexp-stubs.cpp342
1 files changed, 0 insertions, 342 deletions
diff --git a/lib/mlibc/options/posix/generic/wordexp-stubs.cpp b/lib/mlibc/options/posix/generic/wordexp-stubs.cpp
deleted file mode 100644
index 8443527..0000000
--- a/lib/mlibc/options/posix/generic/wordexp-stubs.cpp
+++ /dev/null
@@ -1,342 +0,0 @@
-/*
- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
- *
- * code taken from OPNSense, with modifications
- *
- * Copyright (c) 2002 Tim J. Robbins.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <wordexp.h>
-#include <fcntl.h>
-#include <sys/wait.h>
-#include <unistd.h>
-#include <errno.h>
-#include <string.h>
-#include <stdlib.h>
-#include <signal.h>
-#include <stdint.h>
-
-#define SHELL_PATH "/bin/sh"
-#define SHELL_NAME "sh"
-
-static size_t we_read_fully(int fd, char *buffer, size_t len) {
- size_t done = 0;
-
- do {
- ssize_t nread = read(fd, buffer + done, len - done);
- if(nread == -1 && errno == EINTR)
- continue;
- if(nread <= 0)
- break;
- done += nread;
- } while (done != len);
-
- return done;
-}
-
-static int we_askshell(const char *words, wordexp_t *we, int flags) {
- int pdes[2]; /* pipe to child */
- char bbuf[9]; /* buffer for byte count */
- char wbuf[9]; /* buffer for word count */
- size_t nwords = 0; /* number of words from child */
- size_t nbytes = 0; /* number of bytes from child */
- size_t sofs = 0; /* offset into we->we_strings */
- size_t vofs = 0; /* offset into we->we_wordv */
- pid_t pid; /* PID of child */
- pid_t wpid; /* waitpid return value */
- int status; /* child exit status */
- int error; /* our return value */
- int serrno; /* errno to return */
- char *np, *p; /* handy pointers */
- char *nstrings; /* temporary for realloc() */
- char **new_wordv; /* temporary for realloc() */
- sigset_t newsigblock;
- sigset_t oldsigblock;
- const char *ifs = getenv("IFS");
-
- serrno = errno;
-
- if(pipe2(pdes, O_CLOEXEC) < 0)
- return WRDE_NOSPACE;
-
- (void)sigemptyset(&newsigblock);
- (void)sigaddset(&newsigblock, SIGCHLD);
- (void)sigprocmask(SIG_BLOCK, &newsigblock, &oldsigblock);
-
- if((pid = fork()) < 0) {
- serrno = errno;
- close(pdes[0]);
- close(pdes[1]);
- (void)sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
- errno = serrno;
- return WRDE_NOSPACE;
- } else if(pid == 0) {
- /*
- * We are the child; make /bin/sh expand `words'.
- */
- (void)sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
- if((pdes[1] != STDOUT_FILENO ? dup2(pdes[1], STDOUT_FILENO) : fcntl(pdes[1], F_SETFD, 0)) < 0)
- _exit(1);
-
- execl(SHELL_PATH, SHELL_NAME, flags & WRDE_UNDEF ? "-u" : "+u",
- "-c", "IFS=$1;eval \"$2\";eval \"set -- $3\";IFS=;a=\"$*\";"
- "printf '%08x' \"$#\" \"${#a}\";printf '%s\\0' \"$@\"", "",
- ifs != NULL ? ifs : " \t\n",
- flags & WRDE_SHOWERR ? "" : "exec 2>/dev/null",
- words,
- (char *)NULL);
- _exit(1);
- }
-
- /*
- * We are the parent; read the output of the shell wordexp function,
- * which is a 32-bit hexadecimal word count, a 32-bit hexadecimal
- * byte count (not including terminating null bytes), followed by
- * the expanded words separated by nulls.
- */
- close(pdes[1]);
- if(we_read_fully(pdes[0], wbuf, 8) != 8 || we_read_fully(pdes[0], bbuf, 8) != 8) {
- error = flags & WRDE_UNDEF ? WRDE_BADVAL : WRDE_SYNTAX;
- serrno = errno;
- goto cleanup;
- }
- wbuf[8] = bbuf[8] = '\0';
- nwords = strtol(wbuf, NULL, 16);
- nbytes = strtol(bbuf, NULL, 16) + nwords;
-
- /*
- * Allocate or reallocate (when flags & WRDE_APPEND) the word vector
- * and string storage buffers for the expanded words we're about to
- * read from the child.
- */
- sofs = we->we_nbytes;
- vofs = we->we_wordc;
- if((flags & (WRDE_DOOFFS|WRDE_APPEND)) == (WRDE_DOOFFS | WRDE_APPEND))
- vofs += we->we_offs;
- we->we_wordc += nwords;
- we->we_nbytes += nbytes;
-
- if((new_wordv = (char **) realloc(we->we_wordv, (we->we_wordc + 1 + (flags & WRDE_DOOFFS ? we->we_offs : 0)) * sizeof(char *))) == NULL) {
- error = WRDE_NOSPACE;
- goto cleanup;
- }
-
- we->we_wordv = new_wordv;
-
- if((nstrings = (char *) realloc(we->we_strings, we->we_nbytes)) == NULL) {
- error = WRDE_NOSPACE;
- goto cleanup;
- }
-
- for(size_t i = 0; i < vofs; i++) {
- if(we->we_wordv[i] != NULL)
- we->we_wordv[i] += nstrings - we->we_strings;
- }
- we->we_strings = nstrings;
-
- if(we_read_fully(pdes[0], we->we_strings + sofs, nbytes) != nbytes) {
- error = flags & WRDE_UNDEF ? WRDE_BADVAL : WRDE_SYNTAX;
- serrno = errno;
- goto cleanup;
- }
-
- error = 0;
-cleanup:
- close(pdes[0]);
-
- do {
- wpid = waitpid(pid, &status, 0);
- } while(wpid < 0 && errno == EINTR);
-
- (void)sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
-
- if(error != 0) {
- errno = serrno;
- return error;
- }
-
- if(wpid < 0 || !WIFEXITED(status) || WEXITSTATUS(status) != 0)
- return flags & WRDE_UNDEF ? WRDE_BADVAL : WRDE_SYNTAX;
-
- /*
- * Break the null-terminated expanded word strings out into
- * the vector.
- */
- if(vofs == 0 && flags & WRDE_DOOFFS) {
- while (vofs < we->we_offs)
- we->we_wordv[vofs++] = NULL;
- }
-
- p = we->we_strings + sofs;
- while (nwords-- != 0) {
- we->we_wordv[vofs++] = p;
- if((np = (char *) memchr(p, '\0', nbytes)) == NULL)
- return WRDE_NOSPACE;
-
- nbytes -= np - p + 1;
- p = np + 1;
- }
-
- we->we_wordv[vofs] = NULL;
- return 0;
-}
-
-/*
- * we_check --
- * Check that the string contains none of the following unquoted
- * special characters: <newline> |&;<>(){}
- * or command substitutions when WRDE_NOCMD is set in flags.
- */
-static int we_check(const char *words, int flags)
-{
- char c;
- int dquote, level, quote, squote;
-
- quote = squote = dquote = 0;
- while ((c = *words++) != '\0') {
- switch (c) {
- case '\\': {
- if(squote == 0)
- quote ^= 1;
- continue;
- }
- case '\'': {
- if(quote + dquote == 0)
- squote ^= 1;
- break;
- }
- case '"': {
- if(quote + squote == 0)
- dquote ^= 1;
- break;
- }
- case '`': {
- if(quote + squote == 0 && flags & WRDE_NOCMD)
- return WRDE_CMDSUB;
- while ((c = *words++) != '\0' && c != '`')
- if(c == '\\' && (c = *words++) == '\0')
- break;
- if(c == '\0')
- return WRDE_SYNTAX;
- break;
- }
- case '|':
- case '&':
- case ';':
- case '<':
- case '>':
- case '{':
- case '}':
- case '(':
- case ')':
- case '\n': {
- if(quote + squote + dquote == 0)
- return WRDE_BADCHAR;
- break;
- }
- case '$': {
- if((c = *words++) == '\0')
- break;
- else if(quote + squote == 0 && c == '(') {
- if(flags & WRDE_NOCMD && *words != '(')
- return WRDE_CMDSUB;
- level = 1;
- while ((c = *words++) != '\0') {
- if(c == '\\') {
- if((c = *words++) == '\0')
- break;
- } else if(c == '(')
- level++;
- else if(c == ')' && --level == 0)
- break;
- }
- if(c == '\0' || level != 0)
- return WRDE_SYNTAX;
- } else if(quote + squote == 0 && c == '{') {
- level = 1;
- while ((c = *words++) != '\0') {
- if(c == '\\') {
- if((c = *words++) == '\0')
- break;
- } else if(c == '{')
- level++;
- else if(c == '}' && --level == 0)
- break;
- }
- if(c == '\0' || level != 0)
- return WRDE_SYNTAX;
- } else
- --words;
- break;
- }
- default: {
- break;
- }
- }
- quote = 0;
- }
-
- if(quote + squote + dquote != 0)
- return WRDE_SYNTAX;
-
- return 0;
-}
-
-int wordexp(const char * __restrict words, wordexp_t * __restrict we, int flags) {
- int error;
-
- if(flags & WRDE_REUSE)
- wordfree(we);
-
- if((flags & WRDE_APPEND) == 0) {
- we->we_wordc = 0;
- we->we_wordv = NULL;
- we->we_strings = NULL;
- we->we_nbytes = 0;
- }
-
- if((error = we_check(words, flags)) != 0) {
- wordfree(we);
- return error;
- }
-
- if((error = we_askshell(words, we, flags)) != 0) {
- wordfree(we);
- return error;
- }
-
- return 0;
-}
-
-void wordfree(wordexp_t *we) {
- if (we == NULL)
- return;
- free(we->we_wordv);
- free(we->we_strings);
- we->we_wordv = NULL;
- we->we_strings = NULL;
- we->we_nbytes = 0;
- we->we_wordc = 0;
-}
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