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-rw-r--r--lib/libc/gen/wordexp.c354
1 files changed, 0 insertions, 354 deletions
diff --git a/lib/libc/gen/wordexp.c b/lib/libc/gen/wordexp.c
deleted file mode 100644
index bcab1f5..0000000
--- a/lib/libc/gen/wordexp.c
+++ /dev/null
@@ -1,354 +0,0 @@
-/*-
- * 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 "namespace.h"
-#include <sys/cdefs.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <paths.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <wordexp.h>
-#include "un-namespace.h"
-
-__FBSDID("$FreeBSD$");
-
-static int we_askshell(const char *, wordexp_t *, int);
-static int we_check(const char *, int);
-
-/*
- * wordexp --
- * Perform shell word expansion on `words' and place the resulting list
- * of words in `we'. See wordexp(3).
- *
- * Specified by IEEE Std. 1003.1-2001.
- */
-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);
-}
-
-static size_t
-we_read_fully(int fd, char *buffer, size_t len)
-{
- size_t done;
- ssize_t nread;
-
- done = 0;
- do {
- nread = _read(fd, buffer + done, len - done);
- if (nread == -1 && errno == EINTR)
- continue;
- if (nread <= 0)
- break;
- done += nread;
- } while (done != len);
- return done;
-}
-
-/*
- * we_askshell --
- * Use the `wordexp' /bin/sh builtin function to do most of the work
- * in expanding the word string. This function is complicated by
- * memory management.
- */
-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 */
- long nwords, nbytes; /* Number of words, bytes from child */
- long i; /* Handy integer */
- size_t sofs; /* Offset into we->we_strings */
- size_t vofs; /* Offset into we->we_wordv */
- pid_t pid; /* Process ID of child */
- pid_t wpid; /* waitpid return value */
- int status; /* Child exit status */
- int error; /* Our return value */
- int serrno; /* errno to return */
- char *ifs; /* IFS env. var. */
- char *np, *p; /* Handy pointers */
- char *nstrings; /* Temporary for realloc() */
- char **nwv; /* Temporary for realloc() */
- sigset_t newsigblock, oldsigblock;
-
- serrno = errno;
- if ((ifs = getenv("IFS")) == NULL)
- ifs = " \t\n";
-
- if (pipe(pdes) < 0)
- return (WRDE_NOSPACE); /* XXX */
- (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); /* XXX */
- }
- else if (pid == 0) {
- /*
- * We are the child; just get /bin/sh to run the wordexp
- * builtin on `words'.
- */
- int devnull;
- char *cmd;
-
- (void)_sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
- _close(pdes[0]);
- if (_dup2(pdes[1], STDOUT_FILENO) < 0)
- _exit(1);
- _close(pdes[1]);
- if (asprintf(&cmd, "wordexp%c%s\n", *ifs, words) < 0)
- _exit(1);
- if ((flags & WRDE_SHOWERR) == 0) {
- if ((devnull = _open(_PATH_DEVNULL, O_RDWR, 0666)) < 0)
- _exit(1);
- if (_dup2(devnull, STDERR_FILENO) < 0)
- _exit(1);
- _close(devnull);
- }
- execl(_PATH_BSHELL, "sh", flags & WRDE_UNDEF ? "-u" : "+u",
- "-c", cmd, (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 ((nwv = 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 = nwv;
- if ((nstrings = realloc(we->we_strings, we->we_nbytes)) == NULL) {
- error = WRDE_NOSPACE;
- goto cleanup;
- }
- for (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 = memchr(p, '\0', nbytes)) == NULL)
- return (WRDE_NOSPACE); /* XXX */
- 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 '\\':
- 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);
-}
-
-/*
- * wordfree --
- * Free the result of wordexp(). See wordexp(3).
- *
- * Specified by IEEE Std. 1003.1-2001.
- */
-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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