11556Srgrimes/*- 21556Srgrimes * Copyright (c) 1991, 1993 31556Srgrimes * The Regents of the University of California. All rights reserved. 41556Srgrimes * 51556Srgrimes * This code is derived from software contributed to Berkeley by 61556Srgrimes * Kenneth Almquist. 71556Srgrimes * 81556Srgrimes * Redistribution and use in source and binary forms, with or without 91556Srgrimes * modification, are permitted provided that the following conditions 101556Srgrimes * are met: 111556Srgrimes * 1. Redistributions of source code must retain the above copyright 121556Srgrimes * notice, this list of conditions and the following disclaimer. 131556Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141556Srgrimes * notice, this list of conditions and the following disclaimer in the 151556Srgrimes * documentation and/or other materials provided with the distribution. 161556Srgrimes * 4. Neither the name of the University nor the names of its contributors 171556Srgrimes * may be used to endorse or promote products derived from this software 181556Srgrimes * without specific prior written permission. 191556Srgrimes * 201556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 211556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 221556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 231556Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 241556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 251556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 261556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 271556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 281556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 291556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 301556Srgrimes * SUCH DAMAGE. 311556Srgrimes */ 321556Srgrimes 331556Srgrimes#ifndef lint 3436150Scharnier#if 0 3536150Scharnierstatic char sccsid[] = "@(#)output.c 8.2 (Berkeley) 5/4/95"; 3636150Scharnier#endif 371556Srgrimes#endif /* not lint */ 3899110Sobrien#include <sys/cdefs.h> 3999110Sobrien__FBSDID("$FreeBSD$"); 401556Srgrimes 411556Srgrimes/* 421556Srgrimes * Shell output routines. We use our own output routines because: 431556Srgrimes * When a builtin command is interrupted we have to discard 441556Srgrimes * any pending output. 451556Srgrimes * When a builtin command appears in back quotes, we want to 461556Srgrimes * save the output of the command in a region obtained 471556Srgrimes * via malloc, rather than doing a fork and reading the 481556Srgrimes * output of the command via a pipe. 491556Srgrimes */ 501556Srgrimes 511556Srgrimes#include <stdio.h> /* defines BUFSIZ */ 5217987Speter#include <string.h> 5317987Speter#include <stdarg.h> 541556Srgrimes#include <errno.h> 5517987Speter#include <unistd.h> 5617987Speter#include <stdlib.h> 571556Srgrimes 5817987Speter#include "shell.h" 5917987Speter#include "syntax.h" 6017987Speter#include "output.h" 6117987Speter#include "memalloc.h" 6217987Speter#include "error.h" 6397909Stjr#include "var.h" 641556Srgrimes 6517987Speter 661556Srgrimes#define OUTBUFSIZ BUFSIZ 67216380Sjilles#define MEM_OUT -2 /* output to dynamically allocated memory */ 681556Srgrimes#define OUTPUT_ERR 01 /* error occurred on output */ 691556Srgrimes 70213811Sobrienstatic int doformat_wr(void *, const char *, int); 711556Srgrimes 721556Srgrimesstruct output output = {NULL, 0, NULL, OUTBUFSIZ, 1, 0}; 73199629Sjillesstruct output errout = {NULL, 0, NULL, 256, 2, 0}; 741556Srgrimesstruct output memout = {NULL, 0, NULL, 0, MEM_OUT, 0}; 751556Srgrimesstruct output *out1 = &output; 761556Srgrimesstruct output *out2 = &errout; 771556Srgrimes 781556Srgrimes 791556Srgrimes 801556Srgrimes#ifdef mkinit 811556Srgrimes 821556SrgrimesINCLUDE "output.h" 831556SrgrimesINCLUDE "memalloc.h" 841556Srgrimes 851556SrgrimesRESET { 861556Srgrimes out1 = &output; 871556Srgrimes out2 = &errout; 881556Srgrimes if (memout.buf != NULL) { 891556Srgrimes ckfree(memout.buf); 901556Srgrimes memout.buf = NULL; 911556Srgrimes } 921556Srgrimes} 931556Srgrimes 941556Srgrimes#endif 951556Srgrimes 961556Srgrimes 971556Srgrimesvoid 98215567Sjillesoutcslow(int c, struct output *file) 99215567Sjilles{ 100215567Sjilles outc(c, file); 101215567Sjilles} 102215567Sjilles 103215567Sjillesvoid 10490111Simpout1str(const char *p) 10590111Simp{ 1061556Srgrimes outstr(p, out1); 1071556Srgrimes} 1081556Srgrimes 10997815Stjrvoid 11097815Stjrout1qstr(const char *p) 11197815Stjr{ 11297815Stjr outqstr(p, out1); 11397815Stjr} 1141556Srgrimes 1151556Srgrimesvoid 11690111Simpout2str(const char *p) 11790111Simp{ 1181556Srgrimes outstr(p, out2); 1191556Srgrimes} 1201556Srgrimes 12197815Stjrvoid 12297815Stjrout2qstr(const char *p) 12397815Stjr{ 12497815Stjr outqstr(p, out2); 12597815Stjr} 1261556Srgrimes 1271556Srgrimesvoid 12890111Simpoutstr(const char *p, struct output *file) 12990111Simp{ 130215303Sjilles outbin(p, strlen(p), file); 1311556Srgrimes} 1321556Srgrimes 13397815Stjr/* Like outstr(), but quote for re-input into the shell. */ 13497815Stjrvoid 13597815Stjroutqstr(const char *p, struct output *file) 13697815Stjr{ 13797815Stjr char ch; 138194516Sjilles int inquotes; 1391556Srgrimes 140153245Sstefanf if (p[0] == '\0') { 141153245Sstefanf outstr("''", file); 142153245Sstefanf return; 143153245Sstefanf } 144194516Sjilles /* Caller will handle '=' if necessary */ 145194516Sjilles if (p[strcspn(p, "|&;<>()$`\\\"' \t\n*?[~#")] == '\0' || 146194516Sjilles strcmp(p, "[") == 0) { 14797909Stjr outstr(p, file); 14897909Stjr return; 14997909Stjr } 15097909Stjr 151194516Sjilles inquotes = 0; 15297815Stjr while ((ch = *p++) != '\0') { 15397815Stjr switch (ch) { 15497815Stjr case '\'': 155194516Sjilles /* Can't quote single quotes inside single quotes. */ 156194516Sjilles if (inquotes) 157215567Sjilles outcslow('\'', file); 158194516Sjilles inquotes = 0; 159194516Sjilles outstr("\\'", file); 16097815Stjr break; 16197815Stjr default: 162194516Sjilles if (!inquotes) 163215567Sjilles outcslow('\'', file); 164194516Sjilles inquotes = 1; 16597815Stjr outc(ch, file); 16697815Stjr } 16797815Stjr } 168194516Sjilles if (inquotes) 169215567Sjilles outcslow('\'', file); 17097815Stjr} 17197815Stjr 172215303Sjillesvoid 173215303Sjillesoutbin(const void *data, size_t len, struct output *file) 174215303Sjilles{ 175215303Sjilles const char *p; 176215303Sjilles 177215303Sjilles p = data; 178215303Sjilles while (len-- > 0) 179215303Sjilles outc(*p++, file); 180215303Sjilles} 181215303Sjilles 1821556Srgrimesvoid 18390111Simpemptyoutbuf(struct output *dest) 18490111Simp{ 1851556Srgrimes int offset; 1861556Srgrimes 187216380Sjilles if (dest->buf == NULL) { 1881556Srgrimes INTOFF; 1891556Srgrimes dest->buf = ckmalloc(dest->bufsize); 1901556Srgrimes dest->nextc = dest->buf; 1911556Srgrimes dest->nleft = dest->bufsize; 1921556Srgrimes INTON; 1931556Srgrimes } else if (dest->fd == MEM_OUT) { 1941556Srgrimes offset = dest->bufsize; 1951556Srgrimes INTOFF; 1961556Srgrimes dest->bufsize <<= 1; 1971556Srgrimes dest->buf = ckrealloc(dest->buf, dest->bufsize); 1981556Srgrimes dest->nleft = dest->bufsize - offset; 1991556Srgrimes dest->nextc = dest->buf + offset; 2001556Srgrimes INTON; 2011556Srgrimes } else { 2021556Srgrimes flushout(dest); 2031556Srgrimes } 2041556Srgrimes dest->nleft--; 2051556Srgrimes} 2061556Srgrimes 2071556Srgrimes 2081556Srgrimesvoid 20990111Simpflushall(void) 21090111Simp{ 2111556Srgrimes flushout(&output); 2121556Srgrimes flushout(&errout); 2131556Srgrimes} 2141556Srgrimes 2151556Srgrimes 2161556Srgrimesvoid 21790111Simpflushout(struct output *dest) 21890111Simp{ 2191556Srgrimes 2201556Srgrimes if (dest->buf == NULL || dest->nextc == dest->buf || dest->fd < 0) 2211556Srgrimes return; 2221556Srgrimes if (xwrite(dest->fd, dest->buf, dest->nextc - dest->buf) < 0) 2231556Srgrimes dest->flags |= OUTPUT_ERR; 2241556Srgrimes dest->nextc = dest->buf; 2251556Srgrimes dest->nleft = dest->bufsize; 2261556Srgrimes} 2271556Srgrimes 2281556Srgrimes 2291556Srgrimesvoid 23090111Simpfreestdout(void) 23190111Simp{ 2321556Srgrimes INTOFF; 2331556Srgrimes if (output.buf) { 2341556Srgrimes ckfree(output.buf); 2351556Srgrimes output.buf = NULL; 2361556Srgrimes output.nleft = 0; 2371556Srgrimes } 2381556Srgrimes INTON; 2391556Srgrimes} 2401556Srgrimes 2411556Srgrimes 2421556Srgrimesvoid 24390111Simpoutfmt(struct output *file, const char *fmt, ...) 24490111Simp{ 2451556Srgrimes va_list ap; 2461556Srgrimes 2471556Srgrimes va_start(ap, fmt); 2481556Srgrimes doformat(file, fmt, ap); 2491556Srgrimes va_end(ap); 2501556Srgrimes} 2511556Srgrimes 2521556Srgrimes 2531556Srgrimesvoid 25490111Simpout1fmt(const char *fmt, ...) 25590111Simp{ 2561556Srgrimes va_list ap; 2571556Srgrimes 2581556Srgrimes va_start(ap, fmt); 2591556Srgrimes doformat(out1, fmt, ap); 2601556Srgrimes va_end(ap); 2611556Srgrimes} 2621556Srgrimes 2631556Srgrimesvoid 264199629Sjillesout2fmt_flush(const char *fmt, ...) 26590111Simp{ 2661556Srgrimes va_list ap; 2671556Srgrimes 2681556Srgrimes va_start(ap, fmt); 2691556Srgrimes doformat(out2, fmt, ap); 2701556Srgrimes va_end(ap); 2711556Srgrimes flushout(out2); 2721556Srgrimes} 2731556Srgrimes 2741556Srgrimesvoid 27590111Simpfmtstr(char *outbuf, int length, const char *fmt, ...) 27690111Simp{ 2771556Srgrimes va_list ap; 2781556Srgrimes 279216380Sjilles INTOFF; 2801556Srgrimes va_start(ap, fmt); 281216380Sjilles vsnprintf(outbuf, length, fmt, ap); 282104286Stjr va_end(ap); 283216380Sjilles INTON; 2841556Srgrimes} 2851556Srgrimes 286213811Sobrienstatic int 287104286Stjrdoformat_wr(void *cookie, const char *buf, int len) 288104286Stjr{ 289104286Stjr struct output *o; 2901556Srgrimes 291104286Stjr o = (struct output *)cookie; 292215303Sjilles outbin(buf, len, o); 2931556Srgrimes 294215303Sjilles return (len); 295104286Stjr} 2961556Srgrimes 2971556Srgrimesvoid 29890111Simpdoformat(struct output *dest, const char *f, va_list ap) 29990111Simp{ 300104286Stjr FILE *fp; 3011556Srgrimes 302104286Stjr if ((fp = fwopen(dest, doformat_wr)) != NULL) { 303104286Stjr vfprintf(fp, f, ap); 304104286Stjr fclose(fp); 3051556Srgrimes } 3061556Srgrimes} 3071556Srgrimes 3081556Srgrimes/* 3091556Srgrimes * Version of write which resumes after a signal is caught. 3101556Srgrimes */ 3111556Srgrimes 3121556Srgrimesint 313200956Sjillesxwrite(int fd, const char *buf, int nbytes) 31490111Simp{ 3151556Srgrimes int ntry; 3161556Srgrimes int i; 3171556Srgrimes int n; 3181556Srgrimes 3191556Srgrimes n = nbytes; 3201556Srgrimes ntry = 0; 3211556Srgrimes for (;;) { 3221556Srgrimes i = write(fd, buf, n); 3231556Srgrimes if (i > 0) { 3241556Srgrimes if ((n -= i) <= 0) 3251556Srgrimes return nbytes; 3261556Srgrimes buf += i; 3271556Srgrimes ntry = 0; 3281556Srgrimes } else if (i == 0) { 3291556Srgrimes if (++ntry > 10) 3301556Srgrimes return nbytes - n; 3311556Srgrimes } else if (errno != EINTR) { 3321556Srgrimes return -1; 3331556Srgrimes } 3341556Srgrimes } 3351556Srgrimes} 336