123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792 |
- /*
- * Copyright (c) Ian F. Darwin 1986-1995.
- * Software written by Ian F. Darwin and others;
- * maintained 1995-present by Christos Zoulas and others.
- *
- * 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 immediately at the beginning of the file, without modification,
- * 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.
- */
- /*
- * compress routines:
- * zmagic() - returns 0 if not recognized, uncompresses and prints
- * information if recognized
- * uncompress(method, old, n, newch) - uncompress old into new,
- * using method, return sizeof new
- */
- #include "file.h"
- #ifndef lint
- FILE_RCSID("@(#)$File: compress.c,v 1.113 2018/10/15 16:29:16 christos Exp $")
- #endif
- #include "magic.h"
- #include <stdlib.h>
- #ifdef HAVE_UNISTD_H
- #include <unistd.h>
- #endif
- #include <string.h>
- #include <errno.h>
- #include <ctype.h>
- #include <stdarg.h>
- #include <signal.h>
- #ifndef HAVE_SIG_T
- typedef void (*sig_t)(int);
- #endif /* HAVE_SIG_T */
- #if !defined(__MINGW32__) && !defined(WIN32)
- #include <sys/ioctl.h>
- #endif
- #ifdef HAVE_SYS_WAIT_H
- #include <sys/wait.h>
- #endif
- #if defined(HAVE_SYS_TIME_H)
- #include <sys/time.h>
- #endif
- #if defined(HAVE_ZLIB_H) && defined(ZLIBSUPPORT)
- #define BUILTIN_DECOMPRESS
- #include <zlib.h>
- #endif
- #if defined(HAVE_BZLIB_H)
- #define BUILTIN_BZLIB
- #include <bzlib.h>
- #endif
- #ifdef DEBUG
- int tty = -1;
- #define DPRINTF(...) do { \
- if (tty == -1) \
- tty = open("/dev/tty", O_RDWR); \
- if (tty == -1) \
- abort(); \
- dprintf(tty, __VA_ARGS__); \
- } while (/*CONSTCOND*/0)
- #else
- #define DPRINTF(...)
- #endif
- #ifdef ZLIBSUPPORT
- /*
- * The following python code is not really used because ZLIBSUPPORT is only
- * defined if we have a built-in zlib, and the built-in zlib handles that.
- * That is not true for android where we have zlib.h and not -lz.
- */
- static const char zlibcode[] =
- "import sys, zlib; sys.stdout.write(zlib.decompress(sys.stdin.read()))";
- static const char *zlib_args[] = { "python", "-c", zlibcode, NULL };
- static int
- zlibcmp(const unsigned char *buf)
- {
- unsigned short x = 1;
- unsigned char *s = CAST(unsigned char *, CAST(void *, &x));
- if ((buf[0] & 0xf) != 8 || (buf[0] & 0x80) != 0)
- return 0;
- if (s[0] != 1) /* endianness test */
- x = buf[0] | (buf[1] << 8);
- else
- x = buf[1] | (buf[0] << 8);
- if (x % 31)
- return 0;
- return 1;
- }
- #endif
- #define gzip_flags "-cd"
- #define lrzip_flags "-do"
- #define lzip_flags gzip_flags
- static const char *gzip_args[] = {
- "gzip", gzip_flags, NULL
- };
- static const char *uncompress_args[] = {
- "uncompress", "-c", NULL
- };
- static const char *bzip2_args[] = {
- "bzip2", "-cd", NULL
- };
- static const char *lzip_args[] = {
- "lzip", lzip_flags, NULL
- };
- static const char *xz_args[] = {
- "xz", "-cd", NULL
- };
- static const char *lrzip_args[] = {
- "lrzip", lrzip_flags, NULL
- };
- static const char *lz4_args[] = {
- "lz4", "-cd", NULL
- };
- static const char *zstd_args[] = {
- "zstd", "-cd", NULL
- };
- #define do_zlib NULL
- #define do_bzlib NULL
- private const struct {
- const void *magic;
- size_t maglen;
- const char **argv;
- void *unused;
- } compr[] = {
- { "\037\235", 2, gzip_args, NULL }, /* compressed */
- /* Uncompress can get stuck; so use gzip first if we have it
- * Idea from Damien Clark, thanks! */
- { "\037\235", 2, uncompress_args, NULL }, /* compressed */
- { "\037\213", 2, gzip_args, do_zlib }, /* gzipped */
- { "\037\236", 2, gzip_args, NULL }, /* frozen */
- { "\037\240", 2, gzip_args, NULL }, /* SCO LZH */
- /* the standard pack utilities do not accept standard input */
- { "\037\036", 2, gzip_args, NULL }, /* packed */
- { "PK\3\4", 4, gzip_args, NULL }, /* pkzipped, */
- /* ...only first file examined */
- { "BZh", 3, bzip2_args, do_bzlib }, /* bzip2-ed */
- { "LZIP", 4, lzip_args, NULL }, /* lzip-ed */
- { "\3757zXZ\0", 6, xz_args, NULL }, /* XZ Utils */
- { "LRZI", 4, lrzip_args, NULL }, /* LRZIP */
- { "\004\"M\030",4, lz4_args, NULL }, /* LZ4 */
- { "\x28\xB5\x2F\xFD", 4, zstd_args, NULL }, /* zstd */
- #ifdef ZLIBSUPPORT
- { RCAST(const void *, zlibcmp), 0, zlib_args, NULL }, /* zlib */
- #endif
- };
- #define OKDATA 0
- #define NODATA 1
- #define ERRDATA 2
- private ssize_t swrite(int, const void *, size_t);
- #if HAVE_FORK
- private size_t ncompr = sizeof(compr) / sizeof(compr[0]);
- private int uncompressbuf(int, size_t, size_t, const unsigned char *,
- unsigned char **, size_t *);
- #ifdef BUILTIN_DECOMPRESS
- private int uncompresszlib(const unsigned char *, unsigned char **, size_t,
- size_t *, int);
- private int uncompressgzipped(const unsigned char *, unsigned char **, size_t,
- size_t *);
- #endif
- #ifdef BUILTIN_BZLIB
- private int uncompressbzlib(const unsigned char *, unsigned char **, size_t,
- size_t *, int);
- #endif
- static int makeerror(unsigned char **, size_t *, const char *, ...)
- __attribute__((__format__(__printf__, 3, 4)));
- private const char *methodname(size_t);
- private int
- format_decompression_error(struct magic_set *ms, size_t i, unsigned char *buf)
- {
- unsigned char *p;
- int mime = ms->flags & MAGIC_MIME;
- if (!mime)
- return file_printf(ms, "ERROR:[%s: %s]", methodname(i), buf);
- for (p = buf; *p; p++)
- if (!isalnum(*p))
- *p = '-';
- return file_printf(ms, "application/x-decompression-error-%s-%s",
- methodname(i), buf);
- }
- protected int
- file_zmagic(struct magic_set *ms, const struct buffer *b, const char *name)
- {
- unsigned char *newbuf = NULL;
- size_t i, nsz;
- char *rbuf;
- file_pushbuf_t *pb;
- int urv, prv, rv = 0;
- int mime = ms->flags & MAGIC_MIME;
- int fd = b->fd;
- const unsigned char *buf = CAST(const unsigned char *, b->fbuf);
- size_t nbytes = b->flen;
- sig_t osigpipe;
- if ((ms->flags & MAGIC_COMPRESS) == 0)
- return 0;
- osigpipe = signal(SIGPIPE, SIG_IGN);
- for (i = 0; i < ncompr; i++) {
- int zm;
- if (nbytes < compr[i].maglen)
- continue;
- #ifdef ZLIBSUPPORT
- if (compr[i].maglen == 0)
- zm = (RCAST(int (*)(const unsigned char *),
- CCAST(void *, compr[i].magic)))(buf);
- else
- #endif
- zm = memcmp(buf, compr[i].magic, compr[i].maglen) == 0;
- if (!zm)
- continue;
- nsz = nbytes;
- urv = uncompressbuf(fd, ms->bytes_max, i, buf, &newbuf, &nsz);
- DPRINTF("uncompressbuf = %d, %s, %" SIZE_T_FORMAT "u\n", urv,
- (char *)newbuf, nsz);
- switch (urv) {
- case OKDATA:
- case ERRDATA:
- ms->flags &= ~MAGIC_COMPRESS;
- if (urv == ERRDATA)
- prv = format_decompression_error(ms, i, newbuf);
- else
- prv = file_buffer(ms, -1, name, newbuf, nsz);
- if (prv == -1)
- goto error;
- rv = 1;
- if ((ms->flags & MAGIC_COMPRESS_TRANSP) != 0)
- goto out;
- if (mime != MAGIC_MIME && mime != 0)
- goto out;
- if ((file_printf(ms,
- mime ? " compressed-encoding=" : " (")) == -1)
- goto error;
- if ((pb = file_push_buffer(ms)) == NULL)
- goto error;
- /*
- * XXX: If file_buffer fails here, we overwrite
- * the compressed text. FIXME.
- */
- if (file_buffer(ms, -1, NULL, buf, nbytes) == -1) {
- if (file_pop_buffer(ms, pb) != NULL)
- abort();
- goto error;
- }
- if ((rbuf = file_pop_buffer(ms, pb)) != NULL) {
- if (file_printf(ms, "%s", rbuf) == -1) {
- free(rbuf);
- goto error;
- }
- free(rbuf);
- }
- if (!mime && file_printf(ms, ")") == -1)
- goto error;
- /*FALLTHROUGH*/
- case NODATA:
- break;
- default:
- abort();
- /*NOTREACHED*/
- error:
- rv = -1;
- break;
- }
- }
- out:
- DPRINTF("rv = %d\n", rv);
- (void)signal(SIGPIPE, osigpipe);
- free(newbuf);
- ms->flags |= MAGIC_COMPRESS;
- DPRINTF("Zmagic returns %d\n", rv);
- return rv;
- }
- #endif
- /*
- * `safe' write for sockets and pipes.
- */
- private ssize_t
- swrite(int fd, const void *buf, size_t n)
- {
- ssize_t rv;
- size_t rn = n;
- do
- switch (rv = write(fd, buf, n)) {
- case -1:
- if (errno == EINTR)
- continue;
- return -1;
- default:
- n -= rv;
- buf = CAST(const char *, buf) + rv;
- break;
- }
- while (n > 0);
- return rn;
- }
- /*
- * `safe' read for sockets and pipes.
- */
- protected ssize_t
- sread(int fd, void *buf, size_t n, int canbepipe __attribute__((__unused__)))
- {
- ssize_t rv;
- #ifdef FIONREAD
- int t = 0;
- #endif
- size_t rn = n;
- if (fd == STDIN_FILENO)
- goto nocheck;
- #ifdef FIONREAD
- if (canbepipe && (ioctl(fd, FIONREAD, &t) == -1 || t == 0)) {
- #ifdef FD_ZERO
- ssize_t cnt;
- for (cnt = 0;; cnt++) {
- fd_set check;
- struct timeval tout = {0, 100 * 1000};
- int selrv;
- FD_ZERO(&check);
- FD_SET(fd, &check);
- /*
- * Avoid soft deadlock: do not read if there
- * is nothing to read from sockets and pipes.
- */
- selrv = select(fd + 1, &check, NULL, NULL, &tout);
- if (selrv == -1) {
- if (errno == EINTR || errno == EAGAIN)
- continue;
- } else if (selrv == 0 && cnt >= 5) {
- return 0;
- } else
- break;
- }
- #endif
- (void)ioctl(fd, FIONREAD, &t);
- }
- if (t > 0 && (size_t)t < n) {
- n = t;
- rn = n;
- }
- #endif
- nocheck:
- do
- switch ((rv = read(fd, buf, n))) {
- case -1:
- if (errno == EINTR)
- continue;
- return -1;
- case 0:
- return rn - n;
- default:
- n -= rv;
- buf = CAST(char *, CCAST(void *, buf)) + rv;
- break;
- }
- while (n > 0);
- return rn;
- }
- protected int
- file_pipe2file(struct magic_set *ms, int fd, const void *startbuf,
- size_t nbytes)
- {
- char buf[4096];
- ssize_t r;
- int tfd;
- (void)strlcpy(buf, "/tmp/file.XXXXXX", sizeof buf);
- #ifndef HAVE_MKSTEMP
- {
- char *ptr = mktemp(buf);
- tfd = open(ptr, O_RDWR|O_TRUNC|O_EXCL|O_CREAT, 0600);
- r = errno;
- (void)unlink(ptr);
- errno = r;
- }
- #else
- {
- int te;
- int ou = umask(0);
- tfd = mkstemp(buf);
- (void)umask(ou);
- te = errno;
- (void)unlink(buf);
- errno = te;
- }
- #endif
- if (tfd == -1) {
- file_error(ms, errno,
- "cannot create temporary file for pipe copy");
- return -1;
- }
- if (swrite(tfd, startbuf, nbytes) != (ssize_t)nbytes)
- r = 1;
- else {
- while ((r = sread(fd, buf, sizeof(buf), 1)) > 0)
- if (swrite(tfd, buf, (size_t)r) != r)
- break;
- }
- switch (r) {
- case -1:
- file_error(ms, errno, "error copying from pipe to temp file");
- return -1;
- case 0:
- break;
- default:
- file_error(ms, errno, "error while writing to temp file");
- return -1;
- }
- /*
- * We duplicate the file descriptor, because fclose on a
- * tmpfile will delete the file, but any open descriptors
- * can still access the phantom inode.
- */
- if ((fd = dup2(tfd, fd)) == -1) {
- file_error(ms, errno, "could not dup descriptor for temp file");
- return -1;
- }
- (void)close(tfd);
- if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) {
- file_badseek(ms);
- return -1;
- }
- return fd;
- }
- #if HAVE_FORK
- #ifdef BUILTIN_DECOMPRESS
- #define FHCRC (1 << 1)
- #define FEXTRA (1 << 2)
- #define FNAME (1 << 3)
- #define FCOMMENT (1 << 4)
- private int
- uncompressgzipped(const unsigned char *old, unsigned char **newch,
- size_t bytes_max, size_t *n)
- {
- unsigned char flg = old[3];
- size_t data_start = 10;
- if (flg & FEXTRA) {
- if (data_start + 1 >= *n)
- goto err;
- data_start += 2 + old[data_start] + old[data_start + 1] * 256;
- }
- if (flg & FNAME) {
- while(data_start < *n && old[data_start])
- data_start++;
- data_start++;
- }
- if (flg & FCOMMENT) {
- while(data_start < *n && old[data_start])
- data_start++;
- data_start++;
- }
- if (flg & FHCRC)
- data_start += 2;
- if (data_start >= *n)
- goto err;
- *n -= data_start;
- old += data_start;
- return uncompresszlib(old, newch, bytes_max, n, 0);
- err:
- return makeerror(newch, n, "File too short");
- }
- private int
- uncompresszlib(const unsigned char *old, unsigned char **newch,
- size_t bytes_max, size_t *n, int zlib)
- {
- int rc;
- z_stream z;
- if ((*newch = CAST(unsigned char *, malloc(bytes_max + 1))) == NULL)
- return makeerror(newch, n, "No buffer, %s", strerror(errno));
- z.next_in = CCAST(Bytef *, old);
- z.avail_in = CAST(uint32_t, *n);
- z.next_out = *newch;
- z.avail_out = CAST(unsigned int, bytes_max);
- z.zalloc = Z_NULL;
- z.zfree = Z_NULL;
- z.opaque = Z_NULL;
- /* LINTED bug in header macro */
- rc = zlib ? inflateInit(&z) : inflateInit2(&z, -15);
- if (rc != Z_OK)
- goto err;
- rc = inflate(&z, Z_SYNC_FLUSH);
- if (rc != Z_OK && rc != Z_STREAM_END)
- goto err;
- *n = (size_t)z.total_out;
- rc = inflateEnd(&z);
- if (rc != Z_OK)
- goto err;
- /* let's keep the nul-terminate tradition */
- (*newch)[*n] = '\0';
- return OKDATA;
- err:
- strlcpy((char *)*newch, z.msg ? z.msg : zError(rc), bytes_max);
- *n = strlen((char *)*newch);
- return ERRDATA;
- }
- #endif
- static int
- makeerror(unsigned char **buf, size_t *len, const char *fmt, ...)
- {
- char *msg;
- va_list ap;
- int rv;
- va_start(ap, fmt);
- rv = vasprintf(&msg, fmt, ap);
- va_end(ap);
- if (rv < 0) {
- *buf = NULL;
- *len = 0;
- return NODATA;
- }
- *buf = (unsigned char *)msg;
- *len = strlen(msg);
- return ERRDATA;
- }
- static void
- closefd(int *fd, size_t i)
- {
- if (fd[i] == -1)
- return;
- (void) close(fd[i]);
- fd[i] = -1;
- }
- static void
- closep(int *fd)
- {
- size_t i;
- for (i = 0; i < 2; i++)
- closefd(fd, i);
- }
- static void
- copydesc(int i, int *fd)
- {
- int j = fd[i == STDIN_FILENO ? 0 : 1];
- if (j == i)
- return;
- if (dup2(j, i) == -1) {
- DPRINTF("dup(%d, %d) failed (%s)\n", j, i, strerror(errno));
- exit(1);
- }
- closep(fd);
- }
- static void
- writechild(int fdp[3][2], const void *old, size_t n)
- {
- int status;
- closefd(fdp[STDIN_FILENO], 0);
- /*
- * fork again, to avoid blocking because both
- * pipes filled
- */
- switch (fork()) {
- case 0: /* child */
- closefd(fdp[STDOUT_FILENO], 0);
- if (swrite(fdp[STDIN_FILENO][1], old, n) != (ssize_t)n) {
- DPRINTF("Write failed (%s)\n", strerror(errno));
- exit(1);
- }
- exit(0);
- /*NOTREACHED*/
- case -1:
- DPRINTF("Fork failed (%s)\n", strerror(errno));
- exit(1);
- /*NOTREACHED*/
- default: /* parent */
- if (wait(&status) == -1) {
- DPRINTF("Wait failed (%s)\n", strerror(errno));
- exit(1);
- }
- DPRINTF("Grandchild wait return %#x\n", status);
- }
- closefd(fdp[STDIN_FILENO], 1);
- }
- static ssize_t
- filter_error(unsigned char *ubuf, ssize_t n)
- {
- char *p;
- char *buf;
- ubuf[n] = '\0';
- buf = (char *)ubuf;
- while (isspace((unsigned char)*buf))
- buf++;
- DPRINTF("Filter error[[[%s]]]\n", buf);
- if ((p = strchr((char *)buf, '\n')) != NULL)
- *p = '\0';
- if ((p = strchr((char *)buf, ';')) != NULL)
- *p = '\0';
- if ((p = strrchr((char *)buf, ':')) != NULL) {
- ++p;
- while (isspace((unsigned char)*p))
- p++;
- n = strlen(p);
- memmove(ubuf, p, CAST(size_t, n + 1));
- }
- DPRINTF("Filter error after[[[%s]]]\n", (char *)ubuf);
- if (islower(*ubuf))
- *ubuf = toupper(*ubuf);
- return n;
- }
- private const char *
- methodname(size_t method)
- {
- #ifdef BUILTIN_DECOMPRESS
- /* FIXME: This doesn't cope with bzip2 */
- if (method == 2 || compr[method].maglen == 0)
- return "zlib";
- #endif
- return compr[method].argv[0];
- }
- private int
- uncompressbuf(int fd, size_t bytes_max, size_t method, const unsigned char *old,
- unsigned char **newch, size_t* n)
- {
- int fdp[3][2];
- int status, rv;
- size_t i;
- ssize_t r;
- #ifdef BUILTIN_DECOMPRESS
- /* FIXME: This doesn't cope with bzip2 */
- if (method == 2)
- return uncompressgzipped(old, newch, bytes_max, n);
- if (compr[method].maglen == 0)
- return uncompresszlib(old, newch, bytes_max, n, 1);
- #endif
- (void)fflush(stdout);
- (void)fflush(stderr);
- for (i = 0; i < __arraycount(fdp); i++)
- fdp[i][0] = fdp[i][1] = -1;
- if ((fd == -1 && pipe(fdp[STDIN_FILENO]) == -1) ||
- pipe(fdp[STDOUT_FILENO]) == -1 || pipe(fdp[STDERR_FILENO]) == -1) {
- closep(fdp[STDIN_FILENO]);
- closep(fdp[STDOUT_FILENO]);
- return makeerror(newch, n, "Cannot create pipe, %s",
- strerror(errno));
- }
- switch (fork()) {
- case 0: /* child */
- if (fd != -1) {
- fdp[STDIN_FILENO][0] = fd;
- (void) lseek(fd, (off_t)0, SEEK_SET);
- }
- for (i = 0; i < __arraycount(fdp); i++)
- copydesc(CAST(int, i), fdp[i]);
- (void)execvp(compr[method].argv[0],
- (char *const *)(intptr_t)compr[method].argv);
- dprintf(STDERR_FILENO, "exec `%s' failed, %s",
- compr[method].argv[0], strerror(errno));
- exit(1);
- /*NOTREACHED*/
- case -1:
- return makeerror(newch, n, "Cannot fork, %s",
- strerror(errno));
- default: /* parent */
- for (i = 1; i < __arraycount(fdp); i++)
- closefd(fdp[i], 1);
- /* Write the buffer data to the child, if we don't have fd */
- if (fd == -1)
- writechild(fdp, old, *n);
- *newch = CAST(unsigned char *, malloc(bytes_max + 1));
- if (*newch == NULL) {
- rv = makeerror(newch, n, "No buffer, %s",
- strerror(errno));
- goto err;
- }
- rv = OKDATA;
- if ((r = sread(fdp[STDOUT_FILENO][0], *newch, bytes_max, 0)) > 0)
- break;
- DPRINTF("Read stdout failed %d (%s)\n", fdp[STDOUT_FILENO][0],
- r != -1 ? strerror(errno) : "no data");
- rv = ERRDATA;
- if (r == 0 &&
- (r = sread(fdp[STDERR_FILENO][0], *newch, bytes_max, 0)) > 0)
- {
- r = filter_error(*newch, r);
- break;
- }
- free(*newch);
- if (r == 0)
- rv = makeerror(newch, n, "Read failed, %s",
- strerror(errno));
- else
- rv = makeerror(newch, n, "No data");
- goto err;
- }
- *n = r;
- /* NUL terminate, as every buffer is handled here. */
- (*newch)[*n] = '\0';
- err:
- closefd(fdp[STDIN_FILENO], 1);
- closefd(fdp[STDOUT_FILENO], 0);
- closefd(fdp[STDERR_FILENO], 0);
- if (wait(&status) == -1) {
- free(*newch);
- rv = makeerror(newch, n, "Wait failed, %s", strerror(errno));
- DPRINTF("Child wait return %#x\n", status);
- } else if (!WIFEXITED(status)) {
- DPRINTF("Child not exited (%#x)\n", status);
- } else if (WEXITSTATUS(status) != 0) {
- DPRINTF("Child exited (%#x)\n", WEXITSTATUS(status));
- }
- closefd(fdp[STDIN_FILENO], 0);
- DPRINTF("Returning %p n=%" SIZE_T_FORMAT "u rv=%d\n", *newch, *n, rv);
- return rv;
- }
- #endif
|