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Cleaup read() and write() variants, plus a couple of new functions like

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xlseek and fdlength() for the new mkswap.
This commit is contained in:
Rob Landley
2006-07-16 08:14:35 +00:00
parent afb94ecf2b
commit 534374755d
39 changed files with 208 additions and 228 deletions
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61
archival/unzip.c
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@@ -32,28 +32,10 @@
#include "unarchive.h"
#include "busybox.h"
#if BB_BIG_ENDIAN
static inline unsigned short
__swap16(unsigned short x) {
return (((uint16_t)(x) & 0xFF) << 8) | (((uint16_t)(x) & 0xFF00) >> 8);
}
static inline uint32_t
__swap32(uint32_t x) {
return (((x & 0xFF) << 24) |
((x & 0xFF00) << 8) |
((x & 0xFF0000) >> 8) |
((x & 0xFF000000) >> 24));
}
#else /* it's little-endian */
# define __swap16(x) (x)
# define __swap32(x) (x)
#endif /* BB_BIG_ENDIAN */
#define ZIP_FILEHEADER_MAGIC __swap32(0x04034b50)
#define ZIP_CDS_MAGIC __swap32(0x02014b50)
#define ZIP_CDS_END_MAGIC __swap32(0x06054b50)
#define ZIP_DD_MAGIC __swap32(0x08074b50)
#define ZIP_FILEHEADER_MAGIC SWAP_LE32(0x04034b50)
#define ZIP_CDS_MAGIC SWAP_LE32(0x02014b50)
#define ZIP_CDS_END_MAGIC SWAP_LE32(0x06054b50)
#define ZIP_DD_MAGIC SWAP_LE32(0x08074b50)
extern unsigned int gunzip_crc;
extern unsigned int gunzip_bytes_out;
@@ -83,13 +65,6 @@ static void unzip_skip(int fd, off_t skip)
}
}
static void unzip_read(int fd, void *buf, size_t count)
{
if (bb_xread(fd, buf, count) != count) {
bb_error_msg_and_die(bb_msg_read_error);
}
}
static void unzip_create_leading_dirs(char *fn)
{
/* Create all leading directories */
@@ -248,7 +223,7 @@ int unzip_main(int argc, char **argv)
unsigned int magic;
/* Check magic number */
unzip_read(src_fd, &magic, 4);
xread(src_fd, &magic, 4);
if (magic == ZIP_CDS_MAGIC) {
break;
} else if (magic != ZIP_FILEHEADER_MAGIC) {
@@ -256,19 +231,17 @@ int unzip_main(int argc, char **argv)
}
/* Read the file header */
unzip_read(src_fd, zip_header.raw, 26);
#if BB_BIG_ENDIAN
zip_header.formated.version = __swap16(zip_header.formated.version);
zip_header.formated.flags = __swap16(zip_header.formated.flags);
zip_header.formated.method = __swap16(zip_header.formated.method);
zip_header.formated.modtime = __swap16(zip_header.formated.modtime);
zip_header.formated.moddate = __swap16(zip_header.formated.moddate);
zip_header.formated.crc32 = __swap32(zip_header.formated.crc32);
zip_header.formated.cmpsize = __swap32(zip_header.formated.cmpsize);
zip_header.formated.ucmpsize = __swap32(zip_header.formated.ucmpsize);
zip_header.formated.filename_len = __swap16(zip_header.formated.filename_len);
zip_header.formated.extra_len = __swap16(zip_header.formated.extra_len);
#endif /* BB_BIG_ENDIAN */
xread(src_fd, zip_header.raw, 26);
zip_header.formated.version = SWAP_LE32(zip_header.formated.version);
zip_header.formated.flags = SWAP_LE32(zip_header.formated.flags);
zip_header.formated.method = SWAP_LE32(zip_header.formated.method);
zip_header.formated.modtime = SWAP_LE32(zip_header.formated.modtime);
zip_header.formated.moddate = SWAP_LE32(zip_header.formated.moddate);
zip_header.formated.crc32 = SWAP_LE32(zip_header.formated.crc32);
zip_header.formated.cmpsize = SWAP_LE32(zip_header.formated.cmpsize);
zip_header.formated.ucmpsize = SWAP_LE32(zip_header.formated.ucmpsize);
zip_header.formated.filename_len = SWAP_LE32(zip_header.formated.filename_len);
zip_header.formated.extra_len = SWAP_LE32(zip_header.formated.extra_len);
if ((zip_header.formated.method != 0) && (zip_header.formated.method != 8)) {
bb_error_msg_and_die("Unsupported compression method %d", zip_header.formated.method);
}
@@ -276,7 +249,7 @@ int unzip_main(int argc, char **argv)
/* Read filename */
free(dst_fn);
dst_fn = xzalloc(zip_header.formated.filename_len + 1);
unzip_read(src_fd, dst_fn, zip_header.formated.filename_len);
xread(src_fd, dst_fn, zip_header.formated.filename_len);
/* Skip extra header bytes */
unzip_skip(src_fd, zip_header.formated.extra_len);