mirror of
https://github.com/freebsd/freebsd-src
synced 2024-09-06 09:10:28 +00:00
various cleanups including:
+ check a possible buffer overflow when creating a temp file, submitted by Christoph Mallon + remove stale struct definitions + clarify the use of dflag and remove useless checks MFC after: 3 days
This commit is contained in:
parent
14560a3610
commit
9cb138bb35
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=186827
|
@ -57,37 +57,19 @@
|
|||
#define MAXRECSIZE 1024
|
||||
#define check(val) if ((error = (val)) != 0) break
|
||||
|
||||
#ifndef min
|
||||
#define min(a,b) (((a)<(b)) ? (a) : (b))
|
||||
#endif
|
||||
static int dflag; /* do not create a hint file, only write on stdout */
|
||||
static int verbose;
|
||||
|
||||
struct mod_info {
|
||||
char* mi_name;
|
||||
int mi_ver;
|
||||
SLIST_ENTRY(mod_info) mi_next;
|
||||
};
|
||||
|
||||
#ifdef notnow
|
||||
struct kld_info {
|
||||
char* k_filename;
|
||||
SLIST_HEAD(mod_list_head, mod_info) k_modules;
|
||||
SLIST_ENTRY(kld_info) k_next;
|
||||
};
|
||||
|
||||
SLIST_HEAD(kld_list_head, kld_info) kldlist;
|
||||
#endif
|
||||
|
||||
static int dflag, verbose;
|
||||
|
||||
FILE *fxref;
|
||||
static FILE *fxref; /* current hints file */
|
||||
|
||||
static const char *xref_file = "linker.hints";
|
||||
|
||||
/*
|
||||
* A record is stored in the static buffer recbuf before going to disk.
|
||||
*/
|
||||
static char recbuf[MAXRECSIZE];
|
||||
static int recpos, reccnt;
|
||||
|
||||
FILE *maketempfile(char *, const char *);
|
||||
static void usage(void);
|
||||
static int recpos; /* current write position */
|
||||
static int reccnt; /* total record written to this file so far */
|
||||
|
||||
static void
|
||||
intalign(void)
|
||||
|
@ -105,7 +87,7 @@ record_start(void)
|
|||
static int
|
||||
record_end(void)
|
||||
{
|
||||
if (dflag || recpos == 0)
|
||||
if (recpos == 0)
|
||||
return 0;
|
||||
reccnt++;
|
||||
intalign();
|
||||
|
@ -123,6 +105,9 @@ record_buf(const void *buf, int size)
|
|||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* An int is stored in host order and aligned
|
||||
*/
|
||||
static int
|
||||
record_int(int val)
|
||||
{
|
||||
|
@ -130,21 +115,21 @@ record_int(int val)
|
|||
return record_buf(&val, sizeof(val));
|
||||
}
|
||||
|
||||
static int
|
||||
record_byte(u_char val)
|
||||
{
|
||||
return record_buf(&val, sizeof(val));
|
||||
}
|
||||
|
||||
/*
|
||||
* A string is stored as 1-byte length plus data, no padding
|
||||
*/
|
||||
static int
|
||||
record_string(const char *str)
|
||||
{
|
||||
int len = strlen(str);
|
||||
int error;
|
||||
|
||||
int len, error;
|
||||
u_char val;
|
||||
|
||||
if (dflag)
|
||||
return 0;
|
||||
error = record_byte(len);
|
||||
val = len = strlen(str);
|
||||
if (len > 255)
|
||||
errx(1, "string %s too long", str);
|
||||
error = record_buf(&val, sizeof(val));
|
||||
if (error)
|
||||
return error;
|
||||
return record_buf(str, len);
|
||||
|
@ -170,21 +155,23 @@ parse_entry(struct mod_metadata *md, const char *cval,
|
|||
break;
|
||||
case MDT_VERSION:
|
||||
check(EF_SEG_READ(ef, data, sizeof(mdv), &mdv));
|
||||
record_int(MDT_VERSION);
|
||||
record_string(cval);
|
||||
record_int(mdv.mv_version);
|
||||
record_string(kldname);
|
||||
if (!dflag)
|
||||
break;
|
||||
printf(" interface %s.%d\n", cval, mdv.mv_version);
|
||||
if (dflag) {
|
||||
printf(" interface %s.%d\n", cval, mdv.mv_version);
|
||||
} else {
|
||||
record_int(MDT_VERSION);
|
||||
record_string(cval);
|
||||
record_int(mdv.mv_version);
|
||||
record_string(kldname);
|
||||
}
|
||||
break;
|
||||
case MDT_MODULE:
|
||||
record_int(MDT_MODULE);
|
||||
record_string(cval);
|
||||
record_string(kldname);
|
||||
if (!dflag)
|
||||
break;
|
||||
printf(" module %s\n", cval);
|
||||
if (dflag) {
|
||||
printf(" module %s\n", cval);
|
||||
} else {
|
||||
record_int(MDT_MODULE);
|
||||
record_string(cval);
|
||||
record_string(kldname);
|
||||
}
|
||||
break;
|
||||
default:
|
||||
warnx("unknown metadata record %d in file %s", md->md_type, kldname);
|
||||
|
@ -199,8 +186,6 @@ read_kld(char *filename, char *kldname)
|
|||
{
|
||||
struct mod_metadata md;
|
||||
struct elf_file ef;
|
||||
/* struct kld_info *kip;
|
||||
struct mod_info *mip;*/
|
||||
void **p, **orgp;
|
||||
int error, eftype, nmlen;
|
||||
long start, finish, entries;
|
||||
|
@ -224,8 +209,9 @@ read_kld(char *filename, char *kldname)
|
|||
}
|
||||
if (!dflag) {
|
||||
cp = strrchr(kldname, '.');
|
||||
nmlen = cp ? min(MAXMODNAME, cp - kldname) :
|
||||
min(MAXMODNAME, strlen(kldname));
|
||||
nmlen = (cp != NULL) ? cp - kldname : (int)strlen(kldname);
|
||||
if (nmlen > MAXMODNAME)
|
||||
nmlen = MAXMODNAME;
|
||||
strlcpy(kldmodname, kldname, nmlen);
|
||||
/* fprintf(fxref, "%s:%s:%d\n", kldmodname, kldname, 0);*/
|
||||
}
|
||||
|
@ -252,27 +238,43 @@ read_kld(char *filename, char *kldname)
|
|||
return error;
|
||||
}
|
||||
|
||||
FILE *
|
||||
/*
|
||||
* Create a temp file in directory root, make sure we don't
|
||||
* overflow the buffer for the destination name
|
||||
*/
|
||||
static FILE *
|
||||
maketempfile(char *dest, const char *root)
|
||||
{
|
||||
char *p;
|
||||
int fd;
|
||||
int n, fd;
|
||||
|
||||
strlcpy(dest, root, MAXPATHLEN);
|
||||
p = strrchr(root, '/');
|
||||
n = p != NULL ? p - root + 1 : 0;
|
||||
if (snprintf(dest, MAXPATHLEN, "%.*slhint.XXXXXX", n, root) >=
|
||||
MAXPATHLEN) {
|
||||
errno = ENAMETOOLONG;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if ((p = strrchr(dest, '/')) != 0)
|
||||
p++;
|
||||
else
|
||||
p = dest;
|
||||
strcpy(p, "lhint.XXXXXX");
|
||||
fd = mkstemp(dest);
|
||||
if (fd >= 0)
|
||||
fchmod(fd, 0644); /* nothing secret in the file */
|
||||
return ((fd == -1) ? NULL : fdopen(fd, "w+"));
|
||||
if (fd < 0)
|
||||
return NULL;
|
||||
fchmod(fd, 0644); /* nothing secret in the file */
|
||||
return fdopen(fd, "w+");
|
||||
}
|
||||
|
||||
static char xrefname[MAXPATHLEN], tempname[MAXPATHLEN];
|
||||
|
||||
static void
|
||||
usage(void)
|
||||
{
|
||||
|
||||
fprintf(stderr, "%s\n",
|
||||
"usage: kldxref [-Rdv] [-f hintsfile] path ..."
|
||||
);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
int
|
||||
main(int argc, char *argv[])
|
||||
{
|
||||
|
@ -282,20 +284,19 @@ main(int argc, char *argv[])
|
|||
struct stat sb;
|
||||
|
||||
fts_options = FTS_PHYSICAL;
|
||||
/* SLIST_INIT(&kldlist);*/
|
||||
|
||||
while ((opt = getopt(argc, argv, "Rdf:v")) != -1) {
|
||||
switch (opt) {
|
||||
case 'd':
|
||||
case 'd': /* no hint file, only print on stdout */
|
||||
dflag = 1;
|
||||
break;
|
||||
case 'f':
|
||||
case 'f': /* use this name instead of linker.hints */
|
||||
xref_file = optarg;
|
||||
break;
|
||||
case 'v':
|
||||
verbose++;
|
||||
break;
|
||||
case 'R':
|
||||
case 'R': /* recurse on directories */
|
||||
fts_options |= FTS_COMFOLLOW;
|
||||
break;
|
||||
default:
|
||||
|
@ -321,19 +322,22 @@ main(int argc, char *argv[])
|
|||
|
||||
for (;;) {
|
||||
p = fts_read(ftsp);
|
||||
if ((p == NULL || p->fts_info == FTS_D) && !dflag && fxref) {
|
||||
if ((p == NULL || p->fts_info == FTS_D) && fxref) {
|
||||
/* close and rename the current hint file */
|
||||
fclose(fxref);
|
||||
fxref = NULL;
|
||||
if (reccnt) {
|
||||
rename(tempname, xrefname);
|
||||
} else {
|
||||
/* didn't find any entry, ignore this file */
|
||||
unlink(tempname);
|
||||
unlink(xrefname);
|
||||
}
|
||||
}
|
||||
if (p == NULL)
|
||||
break;
|
||||
if (p && p->fts_info == FTS_D && !dflag) {
|
||||
if (p->fts_info == FTS_D && !dflag) {
|
||||
/* visiting a new directory, create a new hint file */
|
||||
snprintf(xrefname, sizeof(xrefname), "%s/%s",
|
||||
ftsp->fts_path, xref_file);
|
||||
fxref = maketempfile(tempname, ftsp->fts_path);
|
||||
|
@ -343,6 +347,7 @@ main(int argc, char *argv[])
|
|||
fwrite(&ival, sizeof(ival), 1, fxref);
|
||||
reccnt = 0;
|
||||
}
|
||||
/* skip non-files or .symbols entries */
|
||||
if (p->fts_info != FTS_F)
|
||||
continue;
|
||||
if (p->fts_namelen >= 8 &&
|
||||
|
@ -353,13 +358,3 @@ main(int argc, char *argv[])
|
|||
fts_close(ftsp);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
usage(void)
|
||||
{
|
||||
|
||||
fprintf(stderr, "%s\n",
|
||||
"usage: kldxref [-Rdv] [-f hintsfile] path ..."
|
||||
);
|
||||
exit(1);
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue