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authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2008-07-10 17:43:01 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2008-07-10 17:43:01 +0000
commitb6052724ffc9d45894147b70e7aff226938bd2d3 (patch)
treee39d062e16d85da315cdb8cc0a96a03f15c10a23
parent0e2c93fc0b5f335d731ff712ce8f42d8616f05b9 (diff)
downloadbusybox-b6052724ffc9d45894147b70e7aff226938bd2d3.tar.gz
busybox-b6052724ffc9d45894147b70e7aff226938bd2d3.tar.bz2
open_transformer: do not return fd, it does not change
libbb: adopt zipped read from modprobe-small function old new delta getoptscmd 708 713 +5 qgravechar 106 109 +3 huft_build 1165 1168 +3 tr_main 474 472 -2 open_transformer 91 89 -2 evalvar 1376 1374 -2 rpm_main 1691 1688 -3 qrealloc 36 33 -3 get_header_tar_lzma 55 52 -3 get_header_tar_gz 100 97 -3 get_header_tar_bz2 55 52 -3 get_header_tar_Z 89 86 -3 find_main 418 406 -12 prepare 302 283 -19 xmalloc_open_zipped_read_close 161 135 -26 xmalloc_read 248 199 -49 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/13 up/down: 11/-130) Total: -119 bytes
-rw-r--r--archival/libunarchive/Kbuild2
-rw-r--r--archival/libunarchive/get_header_tar_bz2.c2
-rw-r--r--archival/libunarchive/get_header_tar_gz.c2
-rw-r--r--archival/libunarchive/get_header_tar_lzma.c2
-rw-r--r--archival/libunarchive/open_transformer.c19
-rw-r--r--archival/rpm.c2
-rw-r--r--archival/tar.c2
-rw-r--r--include/libbb.h9
-rw-r--r--include/unarchive.h6
-rw-r--r--libbb/read.c62
-rw-r--r--modutils/modprobe-small.c28
11 files changed, 70 insertions, 66 deletions
diff --git a/archival/libunarchive/Kbuild b/archival/libunarchive/Kbuild
index 1bc054a96..609bc50cb 100644
--- a/archival/libunarchive/Kbuild
+++ b/archival/libunarchive/Kbuild
@@ -43,6 +43,8 @@ lib-$(CONFIG_FEATURE_DEB_TAR_GZ) += open_transformer.o
lib-$(CONFIG_FEATURE_DEB_TAR_BZ2) += open_transformer.o
lib-$(CONFIG_FEATURE_DEB_TAR_LZMA) += open_transformer.o
+lib-$(CONFIG_FEATURE_MODPROBE_SMALL_ZIPPED) += open_transformer.o decompress_unzip.o decompress_bunzip2.o
+
lib-$(CONFIG_AR) += get_header_ar.o unpack_ar_archive.o
lib-$(CONFIG_BUNZIP2) += decompress_bunzip2.o
lib-$(CONFIG_UNLZMA) += decompress_unlzma.o
diff --git a/archival/libunarchive/get_header_tar_bz2.c b/archival/libunarchive/get_header_tar_bz2.c
index cfdc016d6..035c10bfb 100644
--- a/archival/libunarchive/get_header_tar_bz2.c
+++ b/archival/libunarchive/get_header_tar_bz2.c
@@ -11,7 +11,7 @@ char FAST_FUNC get_header_tar_bz2(archive_handle_t *archive_handle)
/* Can't lseek over pipes */
archive_handle->seek = seek_by_read;
- archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_bz2_stream, "bunzip2");
+ open_transformer(archive_handle->src_fd, unpack_bz2_stream, "bunzip2");
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS)
continue;
diff --git a/archival/libunarchive/get_header_tar_gz.c b/archival/libunarchive/get_header_tar_gz.c
index 33c62729e..086c6df42 100644
--- a/archival/libunarchive/get_header_tar_gz.c
+++ b/archival/libunarchive/get_header_tar_gz.c
@@ -25,7 +25,7 @@ char FAST_FUNC get_header_tar_gz(archive_handle_t *archive_handle)
}
#endif
- archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_gz_stream, "gunzip");
+ open_transformer(archive_handle->src_fd, unpack_gz_stream, "gunzip");
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS)
continue;
diff --git a/archival/libunarchive/get_header_tar_lzma.c b/archival/libunarchive/get_header_tar_lzma.c
index 730c1b1bb..03b1b792d 100644
--- a/archival/libunarchive/get_header_tar_lzma.c
+++ b/archival/libunarchive/get_header_tar_lzma.c
@@ -14,7 +14,7 @@ char FAST_FUNC get_header_tar_lzma(archive_handle_t *archive_handle)
/* Can't lseek over pipes */
archive_handle->seek = seek_by_read;
- archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_lzma_stream, "unlzma");
+ open_transformer(archive_handle->src_fd, unpack_lzma_stream, "unlzma");
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS)
continue;
diff --git a/archival/libunarchive/open_transformer.c b/archival/libunarchive/open_transformer.c
index a5ee97167..42fdd96a6 100644
--- a/archival/libunarchive/open_transformer.c
+++ b/archival/libunarchive/open_transformer.c
@@ -11,7 +11,7 @@
* On MMU machine, the transform_prog is removed by macro magic
* in include/unarchive.h. On NOMMU, transformer is removed.
*/
-int FAST_FUNC open_transformer(int src_fd,
+void FAST_FUNC open_transformer(int fd,
USE_DESKTOP(long long) int FAST_FUNC (*transformer)(int src_fd, int dst_fd),
const char *transform_prog)
{
@@ -32,20 +32,20 @@ int FAST_FUNC open_transformer(int src_fd,
if (pid == 0) {
/* child process */
- close(fd_pipe.rd); /* We don't want to read from the parent */
+ close(fd_pipe.rd); /* we don't want to read from the parent */
// FIXME: error check?
#if BB_MMU
- transformer(src_fd, fd_pipe.wr);
+ transformer(fd, fd_pipe.wr);
if (ENABLE_FEATURE_CLEAN_UP) {
- close(fd_pipe.wr); /* Send EOF */
- close(src_fd);
+ close(fd_pipe.wr); /* send EOF */
+ close(fd);
}
/* must be _exit! bug was actually seen here */
_exit(EXIT_SUCCESS);
#else
{
char *argv[4];
- xmove_fd(src_fd, 0);
+ xmove_fd(fd, 0);
xmove_fd(fd_pipe.wr, 1);
argv[0] = (char*)transform_prog;
argv[1] = (char*)"-cf";
@@ -59,9 +59,6 @@ int FAST_FUNC open_transformer(int src_fd,
}
/* parent process */
- close(fd_pipe.wr); /* Don't want to write to the child */
-
-//TODO: get rid of return value (become void)?
- xmove_fd(fd_pipe.rd, src_fd);
- return src_fd;
+ close(fd_pipe.wr); /* don't want to write to the child */
+ xmove_fd(fd_pipe.rd, fd);
}
diff --git a/archival/rpm.c b/archival/rpm.c
index b3d7cd5f7..e6dd3d853 100644
--- a/archival/rpm.c
+++ b/archival/rpm.c
@@ -236,7 +236,7 @@ static void extract_cpio_gz(int fd)
}
xchdir("/"); /* Install RPM's to root */
- archive_handle->src_fd = open_transformer(archive_handle->src_fd, xformer, xformer_prog);
+ open_transformer(archive_handle->src_fd, xformer, xformer_prog);
archive_handle->offset = 0;
while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
continue;
diff --git a/archival/tar.c b/archival/tar.c
index 13cdbd930..a46442f8e 100644
--- a/archival/tar.c
+++ b/archival/tar.c
@@ -692,7 +692,7 @@ static char FAST_FUNC get_header_tar_Z(archive_handle_t *archive_handle)
bb_error_msg_and_die("invalid magic");
}
- archive_handle->src_fd = open_transformer(archive_handle->src_fd, uncompress, "uncompress");
+ open_transformer(archive_handle->src_fd, uncompress, "uncompress");
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS)
continue;
diff --git a/include/libbb.h b/include/libbb.h
index 2dfdded5b..671584b43 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -583,15 +583,18 @@ extern unsigned char xread_char(int fd) FAST_FUNC;
// Reads one line a-la fgets (but doesn't save terminating '\n').
// Uses single full_read() call, works only on seekable streams.
extern char *reads(int fd, char *buf, size_t count) FAST_FUNC;
+extern ssize_t read_close(int fd, void *buf, size_t maxsz) FAST_FUNC;
+extern ssize_t open_read_close(const char *filename, void *buf, size_t maxsz) FAST_FUNC;
// Reads one line a-la fgets (but doesn't save terminating '\n').
// Reads byte-by-byte. Useful when it is important to not read ahead.
// Bytes are appended to pfx (which must be malloced, or NULL).
extern char *xmalloc_reads(int fd, char *pfx, size_t *maxsz_p) FAST_FUNC;
-extern ssize_t read_close(int fd, void *buf, size_t maxsz) FAST_FUNC;
-extern ssize_t open_read_close(const char *filename, void *buf, size_t maxsz) FAST_FUNC;
-extern void *xmalloc_read(int fd, size_t *sizep) FAST_FUNC;
+/* Reads block up to *maxsz_p (default: MAX_INT(ssize_t)) */
+extern void *xmalloc_read(int fd, size_t *maxsz_p) FAST_FUNC;
/* Returns NULL if file can't be opened */
extern void *xmalloc_open_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC;
+/* Autodetects .gz etc */
+extern void *xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p) FAST_FUNC;
/* Never returns NULL */
extern void *xmalloc_xopen_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC;
diff --git a/include/unarchive.h b/include/unarchive.h
index 1fab570c3..0e380db08 100644
--- a/include/unarchive.h
+++ b/include/unarchive.h
@@ -126,12 +126,12 @@ extern USE_DESKTOP(long long) int unpack_gz_stream(int src_fd, int dst_fd) FAST_
extern USE_DESKTOP(long long) int unpack_lzma_stream(int src_fd, int dst_fd) FAST_FUNC;
#if BB_MMU
-extern int open_transformer(int src_fd,
+extern void open_transformer(int fd,
USE_DESKTOP(long long) int FAST_FUNC (*transformer)(int src_fd, int dst_fd)) FAST_FUNC;
-#define open_transformer(src_fd, transformer, transform_prog) open_transformer(src_fd, transformer)
+#define open_transformer(fd, transformer, transform_prog) open_transformer(fd, transformer)
#else
extern int open_transformer(int src_fd, const char *transform_prog) FAST_FUNC;
-#define open_transformer(src_fd, transformer, transform_prog) open_transformer(src_fd, transform_prog)
+#define open_transformer(fd, transformer, transform_prog) open_transformer(fd, transform_prog)
#endif
#if __GNUC_PREREQ(4,1)
diff --git a/libbb/read.c b/libbb/read.c
index e67bbfb7e..7af895207 100644
--- a/libbb/read.c
+++ b/libbb/read.c
@@ -8,6 +8,9 @@
*/
#include "libbb.h"
+#if ENABLE_FEATURE_MODPROBE_SMALL_ZIPPED
+#include "unarchive.h"
+#endif
ssize_t FAST_FUNC safe_read(int fd, void *buf, size_t count)
{
@@ -206,14 +209,14 @@ ssize_t FAST_FUNC open_read_close(const char *filename, void *buf, size_t size)
// Read (potentially big) files in one go. File size is estimated
// by stat. Extra '\0' byte is appended.
-void* FAST_FUNC xmalloc_read(int fd, size_t *sizep)
+void* FAST_FUNC xmalloc_read(int fd, size_t *maxsz_p)
{
char *buf;
size_t size, rd_size, total;
- off_t to_read;
+ size_t to_read;
struct stat st;
- to_read = sizep ? *sizep : MAXINT(ssize_t); /* max to read */
+ to_read = maxsz_p ? *maxsz_p : MAXINT(ssize_t); /* max to read */
/* Estimate file size */
st.st_size = 0; /* in case fstat fails, assume 0 */
@@ -229,16 +232,16 @@ void* FAST_FUNC xmalloc_read(int fd, size_t *sizep)
size = to_read;
buf = xrealloc(buf, total + size + 1);
rd_size = full_read(fd, buf + total, size);
- if ((ssize_t)rd_size < 0) { /* error */
+ if ((ssize_t)rd_size == (ssize_t)(-1)) { /* error */
free(buf);
return NULL;
}
total += rd_size;
if (rd_size < size) /* EOF */
break;
- to_read -= rd_size;
- if (to_read <= 0)
+ if (to_read <= rd_size)
break;
+ to_read -= rd_size;
/* grow by 1/8, but in [1k..64k] bounds */
size = ((total / 8) | 0x3ff) + 1;
if (size > 64*1024)
@@ -247,8 +250,8 @@ void* FAST_FUNC xmalloc_read(int fd, size_t *sizep)
xrealloc(buf, total + 1);
buf[total] = '\0';
- if (sizep)
- *sizep = total;
+ if (maxsz_p)
+ *maxsz_p = total;
return buf;
}
@@ -260,7 +263,7 @@ void* FAST_FUNC xmalloc_read(int fd, size_t *sizep)
// Read (potentially big) files in one go. File size is estimated by
// lseek to end.
-void* FAST_FUNC xmalloc_open_read_close(const char *filename, size_t *sizep)
+void* FAST_FUNC xmalloc_open_read_close(const char *filename, size_t *maxsz_p)
{
char *buf;
size_t size;
@@ -277,7 +280,7 @@ void* FAST_FUNC xmalloc_open_read_close(const char *filename, size_t *sizep)
len = lseek(fd, 0, SEEK_END) | 0x3ff; /* + up to 1k */
if (len != (off_t)-1) {
xlseek(fd, 0, SEEK_SET);
- size = sizep ? *sizep : INT_MAX;
+ size = maxsz_p ? *maxsz_p : INT_MAX;
if (len < size)
size = len;
}
@@ -291,15 +294,15 @@ void* FAST_FUNC xmalloc_open_read_close(const char *filename, size_t *sizep)
xrealloc(buf, size + 1);
buf[size] = '\0';
- if (sizep)
- *sizep = size;
+ if (maxsz_p)
+ *maxsz_p = size;
return buf;
}
#endif
// Read (potentially big) files in one go. File size is estimated
// by stat.
-void* FAST_FUNC xmalloc_open_read_close(const char *filename, size_t *sizep)
+void* FAST_FUNC xmalloc_open_read_close(const char *filename, size_t *maxsz_p)
{
char *buf;
int fd;
@@ -308,15 +311,42 @@ void* FAST_FUNC xmalloc_open_read_close(const char *filename, size_t *sizep)
if (fd < 0)
return NULL;
- buf = xmalloc_read(fd, sizep);
+ buf = xmalloc_read(fd, maxsz_p);
close(fd);
return buf;
}
-void* FAST_FUNC xmalloc_xopen_read_close(const char *filename, size_t *sizep)
+void* FAST_FUNC xmalloc_xopen_read_close(const char *filename, size_t *maxsz_p)
{
- void *buf = xmalloc_open_read_close(filename, sizep);
+ void *buf = xmalloc_open_read_close(filename, maxsz_p);
if (!buf)
bb_perror_msg_and_die("can't read '%s'", filename);
return buf;
}
+
+#if ENABLE_FEATURE_MODPROBE_SMALL_ZIPPED
+void* FAST_FUNC xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p)
+{
+ char *image;
+ char *suffix;
+
+ int fd = open(fname, O_RDONLY);
+ if (fd < 0)
+ return NULL;
+
+ suffix = strrchr(fname, '.');
+ if (suffix) {
+ if (strcmp(suffix, ".gz") == 0)
+ open_transformer(fd, unpack_gz_stream, "gunzip");
+ else if (strcmp(suffix, ".bz2") == 0)
+ open_transformer(fd, unpack_bz2_stream, "bunzip2");
+ }
+
+ image = xmalloc_read(fd, maxsz_p);
+ if (!image)
+ bb_perror_msg("read error from '%s'", fname);
+ close(fd);
+
+ return image;
+}
+#endif
diff --git a/modutils/modprobe-small.c b/modutils/modprobe-small.c
index f28c42558..517c103d5 100644
--- a/modutils/modprobe-small.c
+++ b/modutils/modprobe-small.c
@@ -143,34 +143,6 @@ static char* str_2_list(const char *str)
}
#if ENABLE_FEATURE_MODPROBE_SMALL_ZIPPED
-static char *xmalloc_open_zipped_read_close(const char *fname, size_t *sizep)
-{
- size_t len;
- char *image;
- char *suffix;
-
- int fd = open_or_warn(fname, O_RDONLY);
- if (fd < 0)
- return NULL;
-
- suffix = strrchr(fname, '.');
- if (suffix) {
- if (strcmp(suffix, ".gz") == 0)
- fd = open_transformer(fd, unpack_gz_stream, "gunzip");
- else if (strcmp(suffix, ".bz2") == 0)
- fd = open_transformer(fd, unpack_bz2_stream, "bunzip2");
- }
-
- len = (sizep) ? *sizep : 64 * 1024 * 1024;
- image = xmalloc_read(fd, &len);
- if (!image)
- bb_perror_msg("read error from '%s'", fname);
- close(fd);
-
- if (sizep)
- *sizep = len;
- return image;
-}
# define read_module xmalloc_open_zipped_read_close
#else
# define read_module xmalloc_open_read_close