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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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

55
applets/applets.c
View File

@ -343,22 +343,15 @@ static void check_suid (struct BB_applet *applet)
bb_error_msg_and_die ("You have no permission to run this applet!");
if ((sct->m_mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) { /* *both* have to be set for sgid */
if (setegid (sct->m_gid))
bb_error_msg_and_die
("BusyBox binary has insufficient rights to set proper GID for applet!");
} else
setgid (rgid); /* no sgid -> drop */
xsetgid(sct->m_gid);
} else xsetgid(rgid); /* no sgid -> drop */
if (sct->m_mode & S_ISUID) {
if (seteuid (sct->m_uid))
bb_error_msg_and_die
("BusyBox binary has insufficient rights to set proper UID for applet!");
} else
setuid (ruid); /* no suid -> drop */
if (sct->m_mode & S_ISUID) xsetuid(sct->m_uid);
else xsetuid(ruid); /* no suid -> drop */
} else {
/* default: drop all privileges */
setgid (rgid);
setuid (ruid);
xsetgid(rgid);
xsetuid(ruid);
}
return;
} else {
@ -374,11 +367,10 @@ static void check_suid (struct BB_applet *applet)
#endif
if (applet->need_suid == _BB_SUID_ALWAYS) {
if (geteuid () != 0)
bb_error_msg_and_die ("This applet requires root privileges!");
if (geteuid()) bb_error_msg_and_die("Applet requires root privileges!");
} else if (applet->need_suid == _BB_SUID_NEVER) {
setgid (rgid); /* drop all privileges */
setuid (ruid);
xsetgid(rgid); /* drop all privileges */
xsetuid(ruid);
}
}
#else
@ -419,14 +411,14 @@ static const char *unpack_usage_messages(void)
case -1: /* error */
exit(1);
case 0: /* child */
bb_full_write(input[1], packed_usage, sizeof(packed_usage));
full_write(input[1], packed_usage, sizeof(packed_usage));
exit(0);
}
/* parent */
close(input[1]);
buf = xmalloc(SIZEOF_usage_messages);
bb_full_read(output[0], buf, SIZEOF_usage_messages);
full_read(output[0], buf, SIZEOF_usage_messages);
return buf;
}
@ -454,33 +446,32 @@ void bb_show_usage (void)
exit (bb_default_error_retval);
}
static int applet_name_compare (const void *x, const void *y)
static int applet_name_compare(const void *name, const void *vapplet)
{
const char *name = x;
const struct BB_applet *applet = y;
const struct BB_applet *applet = vapplet;
return strcmp (name, applet->name);
return strcmp(name, applet->name);
}
extern const size_t NUM_APPLETS;
struct BB_applet *find_applet_by_name (const char *name)
struct BB_applet *find_applet_by_name(const char *name)
{
return bsearch (name, applets, NUM_APPLETS, sizeof (struct BB_applet),
return bsearch(name, applets, NUM_APPLETS, sizeof(struct BB_applet),
applet_name_compare);
}
void run_applet_by_name (const char *name, int argc, char **argv)
void run_applet_by_name(const char *name, int argc, char **argv)
{
if(ENABLE_FEATURE_SUID_CONFIG) parse_config_file ();
if (ENABLE_FEATURE_SUID_CONFIG) parse_config_file();
if(!strncmp(name, "busybox", 7)) busybox_main(argc, argv);
if (!strncmp(name, "busybox", 7)) busybox_main(argc, argv);
/* Do a binary search to find the applet entry given the name. */
applet_using = find_applet_by_name(name);
if(applet_using) {
if (applet_using) {
bb_applet_name = applet_using->name;
if(argc==2 && !strcmp(argv[1], "--help")) bb_show_usage ();
if(ENABLE_FEATURE_SUID) check_suid (applet_using);
exit ((*(applet_using->main)) (argc, argv));
if(argc==2 && !strcmp(argv[1], "--help")) bb_show_usage();
if(ENABLE_FEATURE_SUID) check_suid(applet_using);
exit((*(applet_using->main))(argc, argv));
}
}

2
archival/ar.c
View File

@ -88,7 +88,7 @@ int ar_main(int argc, char **argv)
llist_add_to(&(archive_handle->accept), argv[optind++]);
}
archive_xread_all(archive_handle, magic, 7);
xread(archive_handle->src_fd, magic, 7);
if (strncmp(magic, "!<arch>", 7) != 0) {
bb_error_msg_and_die("Invalid ar magic");
}

4
archival/gunzip.c
View File

@ -112,10 +112,10 @@ int gunzip_main(int argc, char **argv)
}
/* do the decompression, and cleanup */
if (bb_xread_char(src_fd) == 0x1f) {
if (xread_char(src_fd) == 0x1f) {
unsigned char magic2;
magic2 = bb_xread_char(src_fd);
magic2 = xread_char(src_fd);
#ifdef CONFIG_FEATURE_GUNZIP_UNCOMPRESS
if (magic2 == 0x9d) {
status = uncompress(src_fd, dst_fd);

1
archival/libunarchive/Makefile.in
View File

@ -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 \

21
archival/libunarchive/archive_xread_all.c
View File

@ -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;
}

2
archival/libunarchive/archive_xread_all_eof.c
View File

@ -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);
}

14
archival/libunarchive/check_header_gzip.c
View File

@ -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;

2
archival/libunarchive/data_extract_to_buffer.c
View File

@ -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);
}

2
archival/libunarchive/decompress_uncompress.c
View File

@ -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;

7
archival/libunarchive/decompress_unzip.c
View File

@ -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++) {

4
archival/libunarchive/get_header_ar.c
View File

@ -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 */

5
archival/libunarchive/get_header_cpio.c
View File

@ -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 {

12
archival/libunarchive/get_header_tar.c
View File

@ -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;

2
archival/libunarchive/get_header_tar_gz.c
View File

@ -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");
}

2
archival/libunarchive/unpack_ar_archive.c
View File

@ -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");
}

2
archival/rpm.c
View File

@ -193,7 +193,7 @@ void extract_cpio_gz(int fd) {
archive_handle->src_fd = fd;
archive_handle->offset = 0;
bb_xread_all(archive_handle->src_fd, &magic, 2);
xread(archive_handle->src_fd, &magic, 2);
if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
bb_error_msg_and_die("Invalid gzip magic");
}

6
archival/rpm2cpio.c
View File

@ -40,7 +40,7 @@ static void skip_header(int rpm_fd)
{
struct rpm_header header;
bb_xread_all(rpm_fd, &header, sizeof(struct rpm_header));
xread(rpm_fd, &header, sizeof(struct rpm_header));
if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC, 3) != 0) {
bb_error_msg_and_die("Invalid RPM header magic"); /* Invalid magic */
}
@ -66,7 +66,7 @@ int rpm2cpio_main(int argc, char **argv)
rpm_fd = bb_xopen(argv[1], O_RDONLY);
}
bb_xread_all(rpm_fd, &lead, sizeof(struct rpm_lead));
xread(rpm_fd, &lead, sizeof(struct rpm_lead));
if (strncmp((char *) &lead.magic, RPM_MAGIC, 4) != 0) {
bb_error_msg_and_die("Invalid RPM magic"); /* Just check the magic, the rest is irrelevant */
}
@ -78,7 +78,7 @@ int rpm2cpio_main(int argc, char **argv)
/* Skip the main header */
skip_header(rpm_fd);
bb_xread_all(rpm_fd, &magic, 2);
xread(rpm_fd, &magic, 2);
if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
bb_error_msg_and_die("Invalid gzip magic");
}

12
archival/tar.c
View File

@ -269,9 +269,9 @@ static inline int writeTarHeader(struct TarBallInfo *tbInfo,
putOctal(header.chksum, 7, chksum);
/* Now write the header out to disk */
if ((size =
bb_full_write(tbInfo->tarFd, (char *) &header,
sizeof(struct TarHeader))) < 0) {
if ((size = full_write(tbInfo->tarFd, (char *) &header,
sizeof(struct TarHeader))) < 0)
{
bb_error_msg(bb_msg_io_error, real_name);
return (FALSE);
}
@ -475,7 +475,7 @@ static inline int writeTarFile(const int tar_fd, const int verboseFlag,
while (1) {
char buf;
int n = bb_full_read(gzipStatusPipe[0], &buf, 1);
int n = full_read(gzipStatusPipe[0], &buf, 1);
if (n == 0 && vfork_exec_errno != 0) {
errno = vfork_exec_errno;
@ -562,8 +562,8 @@ static char get_header_tar_Z(archive_handle_t *archive_handle)
archive_handle->seek = seek_by_char;
/* do the decompression, and cleanup */
if (bb_xread_char(archive_handle->src_fd) != 0x1f ||
bb_xread_char(archive_handle->src_fd) != 0x9d)
if (xread_char(archive_handle->src_fd) != 0x1f ||
xread_char(archive_handle->src_fd) != 0x9d)
{
bb_error_msg_and_die("Invalid magic");
}

2
archival/uncompress.c
View File

@ -70,7 +70,7 @@ int uncompress_main(int argc, char **argv)
}
/* do the decompression, and cleanup */
if ((bb_xread_char(src_fd) != 0x1f) || (bb_xread_char(src_fd) != 0x9d)) {
if ((xread_char(src_fd) != 0x1f) || (xread_char(src_fd) != 0x9d)) {
bb_error_msg_and_die("Invalid magic");
}

61
archival/unzip.c
View File

@ -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);

14
console-tools/loadkmap.c
View File

@ -45,15 +45,15 @@ int loadkmap_main(int argc, char **argv)
fd = bb_xopen(CURRENT_VC, O_RDWR);
if ((bb_full_read(0, buff, 7) != 7) || (strncmp(buff, BINARY_KEYMAP_MAGIC, 7) != 0))
xread(0, buff, 7);
if (strncmp(buff, BINARY_KEYMAP_MAGIC, 7))
bb_error_msg_and_die("This is not a valid binary keymap.");
if (bb_full_read(0, flags, MAX_NR_KEYMAPS) != MAX_NR_KEYMAPS)
bb_perror_msg_and_die("Error reading keymap flags");
xread(0, flags, MAX_NR_KEYMAPS);
for (i = 0; i < MAX_NR_KEYMAPS; i++) {
if (flags[i] == 1) {
bb_full_read(0, ibuff, NR_KEYS * sizeof(u_short));
xread(0, ibuff, NR_KEYS * sizeof(u_short));
for (j = 0; j < NR_KEYS; j++) {
ke.kb_index = j;
ke.kb_table = i;
@ -63,8 +63,6 @@ int loadkmap_main(int argc, char **argv)
}
}
/* Don't bother to close files. Exit does that
* automagically, so we can save a few bytes */
/* close(fd); */
return EXIT_SUCCESS;
if (ENABLE_FEATURE_CLEAN_UP) close(fd);
return 0;
}

12
coreutils/dd.c
View File

@ -196,26 +196,20 @@ int dd_main(int argc, char **argv)
tmp += d;
oc += d;
if (oc == obs) {
if (bb_full_write(ofd, obuf, obs) < 0) {
bb_perror_msg_and_die("%s", outfile);
}
xwrite(ofd, obuf, obs);
out_full++;
oc = 0;
}
}
} else {
if ((n = bb_full_write(ofd, ibuf, n)) < 0) {
bb_perror_msg_and_die("%s", outfile);
}
xwrite(ofd, ibuf, n);
if (n == ibs) out_full++;
else out_part++;
}
}
if (ENABLE_FEATURE_DD_IBS_OBS && oc) {
if (bb_full_write(ofd, obuf, oc) < 0) {
bb_perror_msg_and_die("%s", outfile);
}
xwrite(ofd, obuf, oc);
out_part++;
}
if (close (ifd) < 0) {

3
coreutils/tail.c
View File

@ -54,9 +54,8 @@ static void tail_xprint_header(const char *fmt, const char *filename)
static void tail_xbb_full_write(const char *buf, size_t len)
{
/* If we get a write error, there is really no sense in continuing. */
if (bb_full_write(STDOUT_FILENO, buf, len) < 0) {
if (full_write(STDOUT_FILENO, buf, len) < 0)
bb_perror_nomsg_and_die();
}
}
static ssize_t tail_read(int fd, char *buf, size_t count)

12
include/libbb.h
View File

@ -133,9 +133,9 @@ extern DIR *bb_xopendir(const char *path);
extern int remove_file(const char *path, int flags);
extern int copy_file(const char *source, const char *dest, int flags);
extern ssize_t safe_read(int fd, void *buf, size_t count);
extern ssize_t bb_full_read(int fd, void *buf, size_t len);
extern ssize_t full_read(int fd, void *buf, size_t len);
extern ssize_t safe_write(int fd, const void *buf, size_t count);
extern ssize_t bb_full_write(int fd, const void *buf, size_t len);
extern ssize_t full_write(int fd, const void *buf, size_t len);
extern int recursive_action(const char *fileName, int recurse,
int followLinks, int depthFirst,
int (*fileAction) (const char *fileName, struct stat* statbuf, void* userData),
@ -187,6 +187,7 @@ extern void itoa_to_buf(int n, char *buf, unsigned buflen);
extern char *itoa(int n);
extern void xsetgid(gid_t gid);
extern void xsetuid(uid_t uid);
extern off_t fdlength(int fd);
#define BB_GETOPT_ERROR 0x80000000UL
extern const char *bb_opt_complementally;
@ -477,9 +478,10 @@ extern int obscure(const char *old, const char *newval, const struct passwd *pwd
extern int bb_xopen(const char *pathname, int flags);
extern int bb_xopen3(const char *pathname, int flags, int mode);
extern ssize_t bb_xread(int fd, void *buf, size_t count);
extern void bb_xread_all(int fd, void *buf, size_t count);
extern unsigned char bb_xread_char(int fd);
extern void xread(int fd, void *buf, size_t count);
extern unsigned char xread_char(int fd);
extern void xlseek(int fd, off_t offset, int whence);
extern void xwrite(int fd, void *buf, size_t count);
#ifndef COMM_LEN
#ifdef TASK_COMM_LEN

1
include/unarchive.h
View File

@ -96,7 +96,6 @@ extern char get_header_tar_gz(archive_handle_t *archive_handle);
extern void seek_by_jump(const archive_handle_t *archive_handle, const unsigned int amount);
extern void seek_by_char(const archive_handle_t *archive_handle, const unsigned int amount);
extern void archive_xread_all(const archive_handle_t *archive_handle, void *buf, const size_t count);
extern ssize_t archive_xread_all_eof(archive_handle_t *archive_handle, unsigned char *buf, size_t count);
extern void data_align(archive_handle_t *archive_handle, const unsigned short boundary);

6
init/init.c
View File

@ -221,7 +221,7 @@ static void message(int device, const char *fmt, ...)
}
}
if ((device & LOG) && (log_fd >= 0)) {
bb_full_write(log_fd, msg, l);
full_write(log_fd, msg, l);
}
#endif
@ -230,7 +230,7 @@ static void message(int device, const char *fmt, ...)
O_WRONLY | O_NOCTTY | O_NONBLOCK);
/* Always send console messages to /dev/console so people will see them. */
if (fd >= 0) {
bb_full_write(fd, msg, l);
full_write(fd, msg, l);
close(fd);
#if ENABLE_DEBUG_INIT
/* all descriptors may be closed */
@ -536,7 +536,7 @@ static pid_t run(const struct init_action *a)
messageD(LOG, "Waiting for enter to start '%s'"
"(pid %d, terminal %s)\n",
cmdpath, getpid(), a->terminal);
bb_full_write(1, press_enter, sizeof(press_enter) - 1);
full_write(1, press_enter, sizeof(press_enter) - 1);
while(read(0, &c, 1) == 1 && c != '\n')
;
}

6
libbb/change_identity.c
View File

@ -46,10 +46,8 @@ const char *change_identity_e2str ( const struct passwd *pw )
return "cannot set groups";
endgrent ( );
if ( setgid ( pw-> pw_gid ))
return "cannot set group id";
if ( setuid ( pw->pw_uid ))
return "cannot set user id";
xsetgid(pw-> pw_gid);
xsetuid(pw->pw_uid);
return NULL;
}

16
libbb/copyfd.c
View File

@ -30,24 +30,24 @@ static ssize_t bb_full_fd_action(int src_fd, int dst_fd, size_t size)
if (src_fd < 0) goto out;
while (!size || total < size)
{
ssize_t wrote, xread;
ssize_t wr, rd;
xread = safe_read(src_fd, buffer,
rd = safe_read(src_fd, buffer,
(!size || size - total > BUFSIZ) ? BUFSIZ : size - total);
if (xread > 0) {
if (rd > 0) {
/* A -1 dst_fd means we need to fake it... */
wrote = (dst_fd < 0) ? xread : bb_full_write(dst_fd, buffer, xread);
if (wrote < xread) {
wr = (dst_fd < 0) ? rd : full_write(dst_fd, buffer, rd);
if (wr < rd) {
bb_perror_msg(bb_msg_write_error);
break;
}
total += wrote;
total += wr;
if (total == size) status = 0;
} else if (xread < 0) {
} else if (rd < 0) {
bb_perror_msg(bb_msg_read_error);
break;
} else if (xread == 0) {
} else if (rd == 0) {
/* All done. */
status = 0;
break;

2
libbb/create_icmp6_socket.c
View File

@ -32,7 +32,7 @@ int create_icmp6_socket(void)
}
/* drop root privs if running setuid */
setuid(getuid());
xsetuid(getuid());
return sock;
}

2
libbb/create_icmp_socket.c
View File

@ -31,7 +31,7 @@ int create_icmp_socket(void)
}
/* drop root privs if running setuid */
setuid(getuid());
xsetuid(getuid());
return sock;
}

2
libbb/full_read.c
View File

@ -17,7 +17,7 @@
* Returns the amount read, or -1 on an error.
* A short read is returned on an end of file.
*/
ssize_t bb_full_read(int fd, void *buf, size_t len)
ssize_t full_read(int fd, void *buf, size_t len)
{
ssize_t cc;
ssize_t total;

2
libbb/full_write.c
View File

@ -16,7 +16,7 @@
* This does multiple writes as necessary.
* Returns the amount written, or -1 on an error.
*/
ssize_t bb_full_write(int fd, const void *buf, size_t len)
ssize_t full_write(int fd, const void *buf, size_t len)
{
ssize_t cc;
ssize_t total;

1
libbb/loop.c
View File

@ -3,6 +3,7 @@
* Utility routines.
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
* Copyright (C) 2005 by Rob Landley <rob@landley.net>
*
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/

95
libbb/xfuncs.c
View File

@ -120,40 +120,55 @@ int bb_xopen3(const char *pathname, int flags, int mode)
#endif
#ifdef L_xread
ssize_t bb_xread(int fd, void *buf, size_t count)
// Die with an error message if we can't read the entire buffer.
void xread(int fd, void *buf, size_t count)
{
ssize_t size;
size = read(fd, buf, count);
if (size < 0) {
bb_perror_msg_and_die(bb_msg_read_error);
}
return(size);
}
#endif
#ifdef L_xread_all
void bb_xread_all(int fd, void *buf, size_t count)
{
ssize_t size;
while (count) {
if ((size = bb_xread(fd, buf, count)) == 0) { /* EOF */
ssize_t size;
if ((size = safe_read(fd, buf, count)) < 1)
bb_error_msg_and_die("Short read");
}
count -= size;
buf = ((char *) buf) + size;
}
return;
}
#endif
#ifdef L_xwrite
// Die with an error message if we can't write the entire buffer.
void xwrite(int fd, void *buf, size_t count)
{
while (count) {
ssize_t size;
if ((size = safe_write(fd, buf, count)) < 1)
bb_error_msg_and_die("Short write");
count -= size;
buf = ((char *) buf) + size;
}
}
#endif
#ifdef L_xlseek
// Die if we can't lseek to the right spot.
void xlseek(int fd, off_t offset, int whence)
{
if (whence != lseek(fd, offset, whence)) bb_error_msg_and_die("lseek");
}
#endif
#ifdef L_xread_char
unsigned char bb_xread_char(int fd)
unsigned char xread_char(int fd)
{
char tmp;
bb_xread_all(fd, &tmp, 1);
xread(fd, &tmp, 1);
return(tmp);
}
@ -294,3 +309,41 @@ void xsetuid(uid_t uid)
if (setuid(uid)) bb_error_msg_and_die("setuid");
}
#endif
#ifdef L_fdlength
off_t fdlength(int fd)
{
off_t bottom = 0, top = 0, pos;
long size;
// If the ioctl works for this, return it.
if (ioctl(fd, BLKGETSIZE, &size) >= 0) return size*512;
// If not, do a binary search for the last location we can read.
do {
char temp;
pos = bottom + (top - bottom) / 2;;
// If we can read from the current location, it's bigger.
if (lseek(fd, pos, 0)>=0 && safe_read(fd, &temp, 1)==1) {
if (bottom == top) bottom = top = (top+1) * 2;
else bottom = pos;
// If we can't, it's smaller.
} else {
if (bottom == top) {
if (!top) return 0;
bottom = top/2;
}
else top = pos;
}
} while (bottom + 1 != top);
return pos + 1;
}
#endif

2
miscutils/rx.c
View File

@ -212,7 +212,7 @@ static int receive(char *error_buf, size_t error_buf_size,
wantBlockNo++;
length += blockLength;
if (bb_full_write(filefd, blockBuf, blockLength) < 0) {
if (full_write(filefd, blockBuf, blockLength) < 0) {
note_error("write to file failed: %m");
goto fatal;
}

16
networking/httpd.c
View File

@ -961,7 +961,7 @@ static int sendHeaders(HttpResponseNum responseNum)
#if DEBUG
fprintf(stderr, "Headers: '%s'", buf);
#endif
return bb_full_write(a_c_w, buf, len);
return full_write(a_c_w, buf, len);
}
/****************************************************************************
@ -1222,7 +1222,7 @@ static int sendCgi(const char *url,
break;
}
} else if(post_readed_size > 0 && FD_ISSET(outFd, &writeSet)) {
count = bb_full_write(outFd, wbuf + post_readed_idx, post_readed_size);
count = full_write(outFd, wbuf + post_readed_idx, post_readed_size);
if(count > 0) {
post_readed_size -= count;
post_readed_idx += count;
@ -1263,14 +1263,14 @@ static int sendCgi(const char *url,
rbuf[count] = 0;
/* check to see if the user script added headers */
if(strncmp(rbuf, "HTTP/1.0 200 OK\r\n", 4) != 0) {
bb_full_write(s, "HTTP/1.0 200 OK\r\n", 17);
full_write(s, "HTTP/1.0 200 OK\r\n", 17);
}
if (strstr(rbuf, "ontent-") == 0) {
bb_full_write(s, "Content-type: text/plain\r\n\r\n", 28);
full_write(s, "Content-type: text/plain\r\n\r\n", 28);
}
firstLine = 0;
}
if (bb_full_write(s, rbuf, count) != count)
if (full_write(s, rbuf, count) != count)
break;
#if DEBUG
@ -1337,8 +1337,8 @@ static int sendFile(const char *url)
char *buf = config->buf;
sendHeaders(HTTP_OK);
while ((count = bb_full_read(f, buf, MAX_MEMORY_BUFF)) > 0) {
if (bb_full_write(a_c_w, buf, count) != count)
while ((count = full_read(f, buf, MAX_MEMORY_BUFF)) > 0) {
if (full_write(a_c_w, buf, count) != count)
break;
}
close(f);
@ -2000,7 +2000,7 @@ int httpd_main(int argc, char *argv[])
# ifdef CONFIG_FEATURE_HTTPD_SETUID
/* drop privileges */
if(uid > 0)
setuid(uid);
xsetuid(uid);
# endif
#endif

12
networking/nc.c
View File

@ -9,8 +9,6 @@
#include "busybox.h"
#define xread bb_xread
static void timeout(int signum)
{
bb_error_msg_and_die("Timed out");
@ -151,13 +149,14 @@ repeatyness:
for (fd = 0; fd < FD_SETSIZE; fd++) {
if (FD_ISSET(fd, &testfds)) {
nread = xread(fd, bb_common_bufsiz1, sizeof(bb_common_bufsiz1));
nread = safe_read(fd, bb_common_bufsiz1,
sizeof(bb_common_bufsiz1));
if (fd == cfd) {
if (!nread) exit(0);
if (nread<1) exit(0);
ofd = STDOUT_FILENO;
} else {
if (!nread) {
if (nread<1) {
// Close outgoing half-connection so they get EOF, but
// leave incoming alone so we can see response.
shutdown(cfd, 1);
@ -166,8 +165,7 @@ repeatyness:
ofd = cfd;
}
if (bb_full_write(ofd, bb_common_bufsiz1, nread) < 0)
bb_perror_msg_and_die(bb_msg_write_error);
xwrite(ofd, bb_common_bufsiz1, nread);
if (delay > 0) sleep(delay);
}
}

4
networking/tftp.c
View File

@ -249,7 +249,7 @@ static int tftp(const int cmd, const struct hostent *host,
block_nr++;
if ((cmd & tftp_cmd_put) && (opcode == TFTP_DATA)) {
len = bb_full_read(localfd, cp, tftp_bufsize - 4);
len = full_read(localfd, cp, tftp_bufsize - 4);
if (len < 0) {
bb_perror_msg(bb_msg_read_error);
@ -420,7 +420,7 @@ static int tftp(const int cmd, const struct hostent *host,
if (tmp == block_nr) {
len = bb_full_write(localfd, &buf[4], len - 4);
len = full_write(localfd, &buf[4], len - 4);
if (len < 0) {
bb_perror_msg(bb_msg_write_error);

10
shell/ash.c
View File

@ -3322,7 +3322,7 @@ evalcommand(union node *cmd, int flags)
}
sp = arglist.list;
}
bb_full_write(preverrout_fd, "\n", 1);
full_write(preverrout_fd, "\n", 1);
}
cmd_is_exec = 0;
@ -4559,7 +4559,7 @@ expandhere(union node *arg, int fd)
{
herefd = fd;
expandarg(arg, (struct arglist *)NULL, 0);
bb_full_write(fd, stackblock(), expdest - (char *)stackblock());
full_write(fd, stackblock(), expdest - (char *)stackblock());
}
@ -8378,7 +8378,7 @@ growstackstr(void)
{
size_t len = stackblocksize();
if (herefd >= 0 && len >= 1024) {
bb_full_write(herefd, stackblock(), len);
full_write(herefd, stackblock(), len);
return stackblock();
}
growstackblock();
@ -10973,7 +10973,7 @@ openhere(union node *redir)
if (redir->type == NHERE) {
len = strlen(redir->nhere.doc->narg.text);
if (len <= PIPESIZE) {
bb_full_write(pip[1], redir->nhere.doc->narg.text, len);
full_write(pip[1], redir->nhere.doc->narg.text, len);
goto out;
}
}
@ -10987,7 +10987,7 @@ openhere(union node *redir)
#endif
signal(SIGPIPE, SIG_DFL);
if (redir->type == NHERE)
bb_full_write(pip[1], redir->nhere.doc->narg.text, len);
full_write(pip[1], redir->nhere.doc->narg.text, len);
else
expandhere(redir->nhere.doc, pip[1]);
_exit(0);