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insmod_ng_main: -80 bytes. Stopp mmapping, use xmalloc_open_read_close().

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This commit is contained in:
Denis Vlasenko 2006-11-21 11:58:14 +00:00
parent a8381948da
commit 9229794ab3
3 changed files with 33 additions and 31 deletions
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13
archival/libunarchive/archive_xread_all_eof.c
View File

@ -3,19 +3,18 @@
* 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"
ssize_t archive_xread_all_eof(archive_handle_t *archive_handle, unsigned char *buf, size_t count)
ssize_t archive_xread_all_eof(archive_handle_t *archive_handle,
unsigned char *buf, size_t count)
{
ssize_t size;
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);
if (size != 0 && size != count) {
bb_error_msg_and_die("short read: %u of %u",
(unsigned)size, (unsigned)count);
}
return(size);
return size;
}

3
include/libbb.h
View File

@ -60,7 +60,7 @@
#define PATH_MAX 256
#endif
/* Not (yet) used, but tested to work correctly
/* Tested to work correctly (IIRC :]) */
#define MAXINT(T) (T)( \
((T)-1) > 0 \
? (T)-1 \
@ -72,7 +72,6 @@
? (T)0 \
: ((T)1 << (sizeof(T)*8-1)) \
)
*/
/* Large file support */
/* Note that CONFIG_LFS forces bbox to be built with all common ops

48
modutils/insmod.c
View File

@ -4263,38 +4263,32 @@ static const char *moderror(int err)
}
}
int insmod_ng_main( int argc, char **argv)
int insmod_ng_main(int argc, char **argv)
{
int i;
int fd;
long int ret;
struct stat st;
unsigned long len;
long ret;
size_t len;
void *map;
char *filename, *options = xstrdup("");
char *filename, *options;
filename = argv[1];
if (!filename) {
filename = *++argv;
if (!filename)
bb_show_usage();
return -1;
}
/* Rest is options */
for (i = 2; i < argc; i++) {
options = xrealloc(options, strlen(options) + 2 + strlen(argv[i]) + 2);
options = xstrdup("");
while (*++argv) {
int optlen = strlen(options);
options = xrealloc(options, optlen + 2 + strlen(*argv) + 2);
/* Spaces handled by "" pairs, but no way of escaping quotes */
if (strchr(argv[i], ' ')) {
strcat(options, "\"");
strcat(options, argv[i]);
strcat(options, "\"");
} else {
strcat(options, argv[i]);
}
strcat(options, " ");
sprintf(options + optlen, (strchr(*argv,' ') ? "\"%s\" " : "%s "), *argv);
}
#if 0
/* Any special reason why mmap? It isn't performace critical... */
int fd;
struct stat st;
unsigned long len;
fd = xopen(filename, O_RDONLY);
fstat(fd, &st);
len = st.st_size;
map = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
@ -4302,6 +4296,16 @@ int insmod_ng_main( int argc, char **argv)
bb_perror_msg_and_die("cannot mmap '%s'", filename);
}
/* map == NULL on Blackfin, probably on other MMU-less systems too. Workaround. */
if (map == NULL) {
map = xmalloc(len);
xread(fd, map, len);
}
#else
len = MAXINT(ssize_t);
map = xmalloc_open_read_close(filename, &len);
#endif
ret = syscall(__NR_init_module, map, len, options);
if (ret != 0) {
bb_perror_msg_and_die("cannot insert '%s': %s (%li)",