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

xlseek and fdlength() for the new mkswap.

12 files changed, 24 insertions, 50 deletions

diff --git a/archival/libunarchive/Makefile.in b/archival/libunarchive/Makefile.in
index 928e5bf8b..46c50f81d 100644
--- a/archival/libunarchive/Makefile.in
+++ b/archival/libunarchive/Makefile.in
@@ -29,7 +29,6 @@ LIBUNARCHIVE-y:= \
         header_list.o \
         header_verbose_list.o \
 \
-        archive_xread_all.o \
         archive_xread_all_eof.o \
 \
         seek_by_char.o \
diff --git a/archival/libunarchive/archive_xread_all.c b/archival/libunarchive/archive_xread_all.c
deleted file mode 100644
index bed8641a2..000000000
--- a/archival/libunarchive/archive_xread_all.c
+++ /dev/null
@@ -1,21 +0,0 @@
-/* vi: set sw=4 ts=4: */
-/*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "unarchive.h"
-#include "libbb.h"
-
-void archive_xread_all(const archive_handle_t *archive_handle, void *buf, const size_t count)
-{
-        ssize_t size;
-
-        size = bb_full_read(archive_handle->src_fd, buf, count);
-        if (size != count) {
-                bb_error_msg_and_die("Short read");
-        }
-        return;
-}
diff --git a/archival/libunarchive/archive_xread_all_eof.c b/archival/libunarchive/archive_xread_all_eof.c
index df9c88a56..e03fb0caa 100644
--- a/archival/libunarchive/archive_xread_all_eof.c
+++ b/archival/libunarchive/archive_xread_all_eof.c
@@ -13,7 +13,7 @@ ssize_t archive_xread_all_eof(archive_handle_t *archive_handle, unsigned char *b
 {
         ssize_t size;
 
-        size = bb_full_read(archive_handle->src_fd, buf, count);
+        size = full_read(archive_handle->src_fd, buf, count);
         if ((size != 0) && (size != count)) {
                 bb_perror_msg_and_die("Short read, read %ld of %ld", (long)size, (long)count);
         }
diff --git a/archival/libunarchive/check_header_gzip.c b/archival/libunarchive/check_header_gzip.c
index 79477c610..77e1e6a46 100644
--- a/archival/libunarchive/check_header_gzip.c
+++ b/archival/libunarchive/check_header_gzip.c
@@ -20,7 +20,7 @@ void check_header_gzip(int src_fd)
                 } formated;
         } header;
 
-        bb_xread_all(src_fd, header.raw, 8);
+        xread(src_fd, header.raw, 8);
 
         /* Check the compression method */
         if (header.formated.method != 8) {
@@ -32,10 +32,10 @@ void check_header_gzip(int src_fd)
                 /* bit 2 set: extra field present */
                 unsigned char extra_short;
 
-                extra_short = bb_xread_char(src_fd) + (bb_xread_char(src_fd) << 8);
+                extra_short = xread_char(src_fd) + (xread_char(src_fd) << 8);
                 while (extra_short > 0) {
                         /* Ignore extra field */
-                        bb_xread_char(src_fd);
+                        xread_char(src_fd);
                         extra_short--;
                 }
         }
@@ -43,19 +43,19 @@ void check_header_gzip(int src_fd)
         /* Discard original name if any */
         if (header.formated.flags & 0x08) {
                 /* bit 3 set: original file name present */
-                while(bb_xread_char(src_fd) != 0);
+                while(xread_char(src_fd) != 0);
         }
 
         /* Discard file comment if any */
         if (header.formated.flags & 0x10) {
                 /* bit 4 set: file comment present */
-                while(bb_xread_char(src_fd) != 0);
+                while(xread_char(src_fd) != 0);
         }
 
         /* Read the header checksum */
         if (header.formated.flags & 0x02) {
-                bb_xread_char(src_fd);
-                bb_xread_char(src_fd);
+                xread_char(src_fd);
+                xread_char(src_fd);
         }
 
         return;
diff --git a/archival/libunarchive/data_extract_to_buffer.c b/archival/libunarchive/data_extract_to_buffer.c
index fe76971df..95cb8f576 100644
--- a/archival/libunarchive/data_extract_to_buffer.c
+++ b/archival/libunarchive/data_extract_to_buffer.c
@@ -14,5 +14,5 @@ void data_extract_to_buffer(archive_handle_t *archive_handle)
 
         archive_handle->buffer = xzalloc(size + 1);
 
-        archive_xread_all(archive_handle, archive_handle->buffer, size);
+        xread(archive_handle->src_fd, archive_handle->buffer, size);
 }
diff --git a/archival/libunarchive/decompress_uncompress.c b/archival/libunarchive/decompress_uncompress.c
index 81764a47f..0c4ab6dda 100644
--- a/archival/libunarchive/decompress_uncompress.c
+++ b/archival/libunarchive/decompress_uncompress.c
@@ -116,7 +116,7 @@ int uncompress(int fd_in, int fd_out)
 
         insize = 0;
 
-        inbuf[0] = bb_xread_char(fd_in);
+        inbuf[0] = xread_char(fd_in);
 
         maxbits = inbuf[0] & BIT_MASK;
         block_mode = inbuf[0] & BLOCK_MODE;
diff --git a/archival/libunarchive/decompress_unzip.c b/archival/libunarchive/decompress_unzip.c
index 46a26933b..8f33e6e6c 100644
--- a/archival/libunarchive/decompress_unzip.c
+++ b/archival/libunarchive/decompress_unzip.c
@@ -116,9 +116,8 @@ static unsigned int fill_bitbuffer(unsigned int bitbuffer, unsigned int *current
                         /* Leave the first 4 bytes empty so we can always unwind the bitbuffer
                          * to the front of the bytebuffer, leave 4 bytes free at end of tail
                          * so we can easily top up buffer in check_trailer_gzip() */
-                        if (!(bytebuffer_size = bb_xread(gunzip_src_fd, &bytebuffer[4], bytebuffer_max - 8))) {
+                        if (1 > (bytebuffer_size = safe_read(gunzip_src_fd, &bytebuffer[4], bytebuffer_max - 8)))
                                 bb_error_msg_and_die("unexpected end of file");
-                        }
                         bytebuffer_size += 4;
                         bytebuffer_offset = 4;
                 }
@@ -862,7 +861,7 @@ int inflate_unzip(int in, int out)
 
         while(1) {
                 int ret = inflate_get_next_window();
-                nwrote = bb_full_write(out, gunzip_window, gunzip_outbuf_count);
+                nwrote = full_write(out, gunzip_window, gunzip_outbuf_count);
                 if (nwrote == -1) {
                         bb_perror_msg("write");
                         return -1;
@@ -896,7 +895,7 @@ int inflate_gunzip(int in, int out)
         /* top up the input buffer with the rest of the trailer */
         count = bytebuffer_size - bytebuffer_offset;
         if (count < 8) {
-                bb_xread_all(in, &bytebuffer[bytebuffer_size], 8 - count);
+                xread(in, &bytebuffer[bytebuffer_size], 8 - count);
                 bytebuffer_size += 8 - count;
         }
         for (count = 0; count != 4; count++) {
diff --git a/archival/libunarchive/get_header_ar.c b/archival/libunarchive/get_header_ar.c
index 44d964287..48d7a5ad8 100644
--- a/archival/libunarchive/get_header_ar.c
+++ b/archival/libunarchive/get_header_ar.c
@@ -43,7 +43,7 @@ char get_header_ar(archive_handle_t *archive_handle)
         if (ar.raw[0] == '\n') {
                 /* fix up the header, we started reading 1 byte too early */
                 memmove(ar.raw, &ar.raw[1], 59);
-                ar.raw[59] = bb_xread_char(archive_handle->src_fd);
+                ar.raw[59] = xread_char(archive_handle->src_fd);
                 archive_handle->offset++;
         }
         archive_handle->offset += 60;
@@ -68,7 +68,7 @@ char get_header_ar(archive_handle_t *archive_handle)
                          * in static variable long_names for use in future entries */
                         ar_long_name_size = typed->size;
                         ar_long_names = xmalloc(ar_long_name_size);
-                        bb_xread_all(archive_handle->src_fd, ar_long_names, ar_long_name_size);
+                        xread(archive_handle->src_fd, ar_long_names, ar_long_name_size);
                         archive_handle->offset += ar_long_name_size;
                         /* This ar entries data section only contained filenames for other records
                          * they are stored in the static ar_long_names for future reference */
diff --git a/archival/libunarchive/get_header_cpio.c b/archival/libunarchive/get_header_cpio.c
index 725c4911a..28c743589 100644
--- a/archival/libunarchive/get_header_cpio.c
+++ b/archival/libunarchive/get_header_cpio.c
@@ -76,7 +76,8 @@ char get_header_cpio(archive_handle_t *archive_handle)
         }
 
         file_header->name = (char *) xzalloc(namesize + 1);
-        archive_xread_all(archive_handle, file_header->name, namesize); /* Read in filename */
+        /* Read in filename */
+        xread(archive_handle->src_fd, file_header->name, namesize);
         archive_handle->offset += namesize;
 
         /* Update offset amount and skip padding before file contents */
@@ -103,7 +104,7 @@ char get_header_cpio(archive_handle_t *archive_handle)
 
         if (S_ISLNK(file_header->mode)) {
                 file_header->link_name = (char *) xzalloc(file_header->size + 1);
-                archive_xread_all(archive_handle, file_header->link_name, file_header->size);
+                xread(archive_handle->src_fd, file_header->link_name, file_header->size);
                 archive_handle->offset += file_header->size;
                 file_header->size = 0; /* Stop possible seeks in future */
         } else {
diff --git a/archival/libunarchive/get_header_tar.c b/archival/libunarchive/get_header_tar.c
index 1cbde9543..4394d23ee 100644
--- a/archival/libunarchive/get_header_tar.c
+++ b/archival/libunarchive/get_header_tar.c
@@ -56,11 +56,7 @@ char get_header_tar(archive_handle_t *archive_handle)
         /* Align header */
         data_align(archive_handle, 512);
 
-        if (bb_full_read(archive_handle->src_fd, tar.raw, 512) != 512) {
-                /* Assume end of file */
-                bb_error_msg_and_die("Short header");
-                //return(EXIT_FAILURE);
-        }
+        xread(archive_handle->src_fd, tar.raw, 512);
         archive_handle->offset += 512;
 
         /* If there is no filename its an empty header */
@@ -69,7 +65,7 @@ char get_header_tar(archive_handle_t *archive_handle)
                         /* This is the second consecutive empty header! End of archive!
                          * Read until the end to empty the pipe from gz or bz2
                          */
-                        while (bb_full_read(archive_handle->src_fd, tar.raw, 512) == 512);
+                        while (full_read(archive_handle->src_fd, tar.raw, 512) == 512);
                         return(EXIT_FAILURE);
                 }
                 end = 1;
@@ -166,14 +162,14 @@ char get_header_tar(archive_handle_t *archive_handle)
 #ifdef CONFIG_FEATURE_TAR_GNU_EXTENSIONS
         case 'L': {
                         longname = xzalloc(file_header->size + 1);
-                        archive_xread_all(archive_handle, longname, file_header->size);
+                        xread(archive_handle->src_fd, longname, file_header->size);
                         archive_handle->offset += file_header->size;
 
                         return(get_header_tar(archive_handle));
                 }
         case 'K': {
                         linkname = xzalloc(file_header->size + 1);
-                        archive_xread_all(archive_handle, linkname, file_header->size);
+                        xread(archive_handle->src_fd, linkname, file_header->size);
                         archive_handle->offset += file_header->size;
 
                         file_header->name = linkname;
diff --git a/archival/libunarchive/get_header_tar_gz.c b/archival/libunarchive/get_header_tar_gz.c
index 3e1f466a7..ad26f465a 100644
--- a/archival/libunarchive/get_header_tar_gz.c
+++ b/archival/libunarchive/get_header_tar_gz.c
@@ -15,7 +15,7 @@ char get_header_tar_gz(archive_handle_t *archive_handle)
         /* Cant lseek over pipe's */
         archive_handle->seek = seek_by_char;
 
-        archive_xread_all(archive_handle, &magic, 2);
+        xread(archive_handle->src_fd, &magic, 2);
         if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
                 bb_error_msg_and_die("Invalid gzip magic");
         }
diff --git a/archival/libunarchive/unpack_ar_archive.c b/archival/libunarchive/unpack_ar_archive.c
index 47cf812ef..eed528391 100644
--- a/archival/libunarchive/unpack_ar_archive.c
+++ b/archival/libunarchive/unpack_ar_archive.c
@@ -12,7 +12,7 @@ void unpack_ar_archive(archive_handle_t *ar_archive)
 {
         char magic[7];
 
-        archive_xread_all(ar_archive, magic, 7);
+        xread(ar_archive->src_fd, magic, 7);
         if (strncmp(magic, "!<arch>", 7) != 0) {
                 bb_error_msg_and_die("Invalid ar magic");
         }