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-rw-r--r--bin/sh/output.c375
1 files changed, 375 insertions, 0 deletions
diff --git a/bin/sh/output.c b/bin/sh/output.c
new file mode 100644
index 000000000000..39b722fdba23
--- /dev/null
+++ b/bin/sh/output.c
@@ -0,0 +1,375 @@
+/*-
+ * Copyright (c) 1991, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Kenneth Almquist.
+ *
+ * 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.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)output.c 8.2 (Berkeley) 5/4/95";
+#endif
+#endif /* not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * Shell output routines. We use our own output routines because:
+ * When a builtin command is interrupted we have to discard
+ * any pending output.
+ * When a builtin command appears in back quotes, we want to
+ * save the output of the command in a region obtained
+ * via malloc, rather than doing a fork and reading the
+ * output of the command via a pipe.
+ */
+
+#include <stdio.h> /* defines BUFSIZ */
+#include <string.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <wchar.h>
+#include <wctype.h>
+
+#include "shell.h"
+#include "syntax.h"
+#include "output.h"
+#include "memalloc.h"
+#include "error.h"
+#include "var.h"
+
+
+#define OUTBUFSIZ BUFSIZ
+#define MEM_OUT -2 /* output to dynamically allocated memory */
+#define OUTPUT_ERR 01 /* error occurred on output */
+
+static int doformat_wr(void *, const char *, int);
+
+struct output output = {NULL, 0, NULL, OUTBUFSIZ, 1, 0};
+struct output errout = {NULL, 0, NULL, 256, 2, 0};
+struct output memout = {NULL, 0, NULL, 0, MEM_OUT, 0};
+struct output *out1 = &output;
+struct output *out2 = &errout;
+
+void
+outcslow(int c, struct output *file)
+{
+ outc(c, file);
+}
+
+void
+out1str(const char *p)
+{
+ outstr(p, out1);
+}
+
+void
+out1qstr(const char *p)
+{
+ outqstr(p, out1);
+}
+
+void
+out2str(const char *p)
+{
+ outstr(p, out2);
+}
+
+void
+out2qstr(const char *p)
+{
+ outqstr(p, out2);
+}
+
+void
+outstr(const char *p, struct output *file)
+{
+ outbin(p, strlen(p), file);
+}
+
+static void
+byteseq(int ch, struct output *file)
+{
+ char seq[4];
+
+ seq[0] = '\\';
+ seq[1] = (ch >> 6 & 0x3) + '0';
+ seq[2] = (ch >> 3 & 0x7) + '0';
+ seq[3] = (ch & 0x7) + '0';
+ outbin(seq, 4, file);
+}
+
+static void
+outdqstr(const char *p, struct output *file)
+{
+ const char *end;
+ mbstate_t mbs;
+ size_t clen;
+ wchar_t wc;
+
+ memset(&mbs, '\0', sizeof(mbs));
+ end = p + strlen(p);
+ outstr("$'", file);
+ while ((clen = mbrtowc(&wc, p, end - p + 1, &mbs)) != 0) {
+ if (clen == (size_t)-2) {
+ while (p < end)
+ byteseq(*p++, file);
+ break;
+ }
+ if (clen == (size_t)-1) {
+ memset(&mbs, '\0', sizeof(mbs));
+ byteseq(*p++, file);
+ continue;
+ }
+ if (wc == L'\n')
+ outcslow('\n', file), p++;
+ else if (wc == L'\r')
+ outstr("\\r", file), p++;
+ else if (wc == L'\t')
+ outstr("\\t", file), p++;
+ else if (!iswprint(wc)) {
+ for (; clen > 0; clen--)
+ byteseq(*p++, file);
+ } else {
+ if (wc == L'\'' || wc == L'\\')
+ outcslow('\\', file);
+ outbin(p, clen, file);
+ p += clen;
+ }
+ }
+ outcslow('\'', file);
+}
+
+/* Like outstr(), but quote for re-input into the shell. */
+void
+outqstr(const char *p, struct output *file)
+{
+ int i;
+
+ if (p[0] == '\0') {
+ outstr("''", file);
+ return;
+ }
+ for (i = 0; p[i] != '\0'; i++) {
+ if ((p[i] > '\0' && p[i] < ' ' && p[i] != '\n') ||
+ (p[i] & 0x80) != 0 || p[i] == '\'') {
+ outdqstr(p, file);
+ return;
+ }
+ }
+
+ if (p[strcspn(p, "|&;<>()$`\\\" \n*?[~#=")] == '\0' ||
+ strcmp(p, "[") == 0) {
+ outstr(p, file);
+ return;
+ }
+
+ outcslow('\'', file);
+ outstr(p, file);
+ outcslow('\'', file);
+}
+
+void
+outbin(const void *data, size_t len, struct output *file)
+{
+ const char *p;
+
+ p = data;
+ while (len-- > 0)
+ outc(*p++, file);
+}
+
+void
+emptyoutbuf(struct output *dest)
+{
+ int offset;
+
+ if (dest->buf == NULL) {
+ INTOFF;
+ dest->buf = ckmalloc(dest->bufsize);
+ dest->nextc = dest->buf;
+ dest->nleft = dest->bufsize;
+ INTON;
+ } else if (dest->fd == MEM_OUT) {
+ offset = dest->bufsize;
+ INTOFF;
+ dest->bufsize <<= 1;
+ dest->buf = ckrealloc(dest->buf, dest->bufsize);
+ dest->nleft = dest->bufsize - offset;
+ dest->nextc = dest->buf + offset;
+ INTON;
+ } else {
+ flushout(dest);
+ }
+ dest->nleft--;
+}
+
+
+void
+flushall(void)
+{
+ flushout(&output);
+ flushout(&errout);
+}
+
+
+void
+flushout(struct output *dest)
+{
+
+ if (dest->buf == NULL || dest->nextc == dest->buf || dest->fd < 0)
+ return;
+ if (xwrite(dest->fd, dest->buf, dest->nextc - dest->buf) < 0)
+ dest->flags |= OUTPUT_ERR;
+ dest->nextc = dest->buf;
+ dest->nleft = dest->bufsize;
+}
+
+
+void
+freestdout(void)
+{
+ INTOFF;
+ if (output.buf) {
+ ckfree(output.buf);
+ output.buf = NULL;
+ output.nleft = 0;
+ }
+ INTON;
+}
+
+
+int
+outiserror(struct output *file)
+{
+ return (file->flags & OUTPUT_ERR);
+}
+
+
+void
+outclearerror(struct output *file)
+{
+ file->flags &= ~OUTPUT_ERR;
+}
+
+
+void
+outfmt(struct output *file, const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ doformat(file, fmt, ap);
+ va_end(ap);
+}
+
+
+void
+out1fmt(const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ doformat(out1, fmt, ap);
+ va_end(ap);
+}
+
+void
+out2fmt_flush(const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ doformat(out2, fmt, ap);
+ va_end(ap);
+ flushout(out2);
+}
+
+void
+fmtstr(char *outbuf, int length, const char *fmt, ...)
+{
+ va_list ap;
+
+ INTOFF;
+ va_start(ap, fmt);
+ vsnprintf(outbuf, length, fmt, ap);
+ va_end(ap);
+ INTON;
+}
+
+static int
+doformat_wr(void *cookie, const char *buf, int len)
+{
+ struct output *o;
+
+ o = (struct output *)cookie;
+ outbin(buf, len, o);
+
+ return (len);
+}
+
+void
+doformat(struct output *dest, const char *f, va_list ap)
+{
+ FILE *fp;
+
+ if ((fp = fwopen(dest, doformat_wr)) != NULL) {
+ vfprintf(fp, f, ap);
+ fclose(fp);
+ }
+}
+
+/*
+ * Version of write which resumes after a signal is caught.
+ */
+
+int
+xwrite(int fd, const char *buf, int nbytes)
+{
+ int ntry;
+ int i;
+ int n;
+
+ n = nbytes;
+ ntry = 0;
+ for (;;) {
+ i = write(fd, buf, n);
+ if (i > 0) {
+ if ((n -= i) <= 0)
+ return nbytes;
+ buf += i;
+ ntry = 0;
+ } else if (i == 0) {
+ if (++ntry > 10)
+ return nbytes - n;
+ } else if (errno != EINTR) {
+ return -1;
+ }
+ }
+}