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-rw-r--r--source3/client/mount.cifs.c106
1 files changed, 70 insertions, 36 deletions
diff --git a/source3/client/mount.cifs.c b/source3/client/mount.cifs.c
index eb45ae5b4a..917942dbc3 100644
--- a/source3/client/mount.cifs.c
+++ b/source3/client/mount.cifs.c
@@ -79,6 +79,40 @@ static char * mountpassword = NULL;
char * domain_name = NULL;
char * prefixpath = NULL;
+/* glibc doesn't have strlcpy, strlcat. Ensure we do. JRA. We
+ * don't link to libreplace so need them here. */
+
+/* like strncpy but does not 0 fill the buffer and always null
+ * terminates. bufsize is the size of the destination buffer */
+size_t strlcpy(char *d, const char *s, size_t bufsize)
+{
+ size_t len = strlen(s);
+ size_t ret = len;
+ if (bufsize <= 0) return 0;
+ if (len >= bufsize) len = bufsize-1;
+ memcpy(d, s, len);
+ d[len] = 0;
+ return ret;
+}
+
+/* like strncat but does not 0 fill the buffer and always null
+ * terminates. bufsize is the length of the buffer, which should
+ * be one more than the maximum resulting string length */
+size_t strlcat(char *d, const char *s, size_t bufsize)
+{
+ size_t len1 = strlen(d);
+ size_t len2 = strlen(s);
+ size_t ret = len1 + len2;
+
+ if (len1+len2 >= bufsize) {
+ len2 = bufsize - (len1+1);
+ }
+ if (len2 > 0) {
+ memcpy(d+len1, s, len2);
+ d[len1+len2] = 0;
+ }
+ return ret;
+}
/* BB finish BB
@@ -498,7 +532,7 @@ static int parse_options(char ** optionsp, int * filesys_flags)
printf("bad user name \"%s\"\n", value);
exit(1);
}
- sprintf(temp, "%u", pw->pw_uid);
+ snprintf(temp, sizeof(temp), "%u", pw->pw_uid);
value = temp;
endpwent();
}
@@ -514,7 +548,7 @@ static int parse_options(char ** optionsp, int * filesys_flags)
printf("bad group name \"%s\"\n", value);
exit(1);
}
- sprintf(temp, "%u", gr->gr_gid);
+ snprintf(temp, sizeof(temp), "%u", gr->gr_gid);
value = temp;
endpwent();
}
@@ -612,9 +646,9 @@ static int parse_options(char ** optionsp, int * filesys_flags)
if (out_len)
out[out_len++] = ',';
if (value)
- sprintf(out + out_len, "%s=%s", data, value);
+ snprintf(out + out_len, word_len + 2, "%s=%s", data, value);
else
- sprintf(out + out_len, "%s", data);
+ snprintf(out + out_len, word_len + 2, "%s", data);
out_len = strlen(out);
nocopy:
@@ -893,6 +927,7 @@ int main(int argc, char ** argv)
int gid = 0;
int optlen = 0;
int orgoptlen = 0;
+ size_t options_size = 0;
int retry = 0; /* set when we have to retry mount with uppercase */
struct stat statbuf;
struct utsname sysinfo;
@@ -1162,38 +1197,38 @@ mount_retry:
optlen += strlen(mountpassword) + 6;
if(options)
free(options);
- options = (char *)malloc(optlen + 10 + 64 /* space for commas in password */ + 8 /* space for domain= , domain name itself was counted as part of the length username string above */);
+ options_size = optlen + 10 + 64;
+ options = (char *)malloc(options_size /* space for commas in password */ + 8 /* space for domain= , domain name itself was counted as part of the length username string above */);
if(options == NULL) {
printf("Could not allocate memory for mount options\n");
return -1;
}
-
options[0] = 0;
- strncat(options,"unc=",4);
- strcat(options,share_name);
+ strlcpy(options,"unc=",options_size);
+ strlcat(options,share_name,options_size);
/* scan backwards and reverse direction of slash */
temp = strrchr(options, '/');
if(temp > options + 6)
*temp = '\\';
if(ipaddr) {
- strncat(options,",ip=",4);
- strcat(options,ipaddr);
+ strlcat(options,",ip=",options_size);
+ strlcat(options,ipaddr,options_size);
}
if(user_name) {
/* check for syntax like user=domain\user */
if(got_domain == 0)
domain_name = check_for_domain(&user_name);
- strncat(options,",user=",6);
- strcat(options,user_name);
+ strlcat(options,",user=",options_size);
+ strlcat(options,user_name,options_size);
}
if(retry == 0) {
- if(domain_name) {
+ if(domain_name) {
/* extra length accounted for in option string above */
- strncat(options,",domain=",8);
- strcat(options,domain_name);
+ strlcat(options,",domain=",options_size);
+ strlcat(options,domain_name,options_size);
}
}
if(mountpassword) {
@@ -1202,21 +1237,21 @@ mount_retry:
/* if(sep is not set)*/
if(retry == 0)
check_for_comma(&mountpassword);
- strncat(options,",pass=",6);
- strcat(options,mountpassword);
+ strlcat(options,",pass=",options_size);
+ strlcat(options,mountpassword,options_size);
}
- strncat(options,",ver=",5);
- strcat(options,MOUNT_CIFS_VERSION_MAJOR);
+ strlcat(options,",ver=",options_size);
+ strlcat(options,MOUNT_CIFS_VERSION_MAJOR,options_size);
if(orgoptions) {
- strcat(options,",");
- strcat(options,orgoptions);
+ strlcat(options,",",options_size);
+ strlcat(options,orgoptions,options_size);
}
if(prefixpath) {
- strncat(options,",prefixpath=",12);
- strcat(options,prefixpath); /* no need to cat the / */
- }
+ strlcat(options,",prefixpath=",options_size);
+ strlcat(options,prefixpath,options_size); /* no need to cat the / */
+ }
if(verboseflag)
printf("\nmount.cifs kernel mount options %s \n",options);
if(mount(share_name, mountpoint, "cifs", flags, options)) {
@@ -1253,30 +1288,30 @@ mount_retry:
pmntfile = setmntent(MOUNTED, "a+");
if(pmntfile) {
mountent.mnt_fsname = share_name;
- mountent.mnt_dir = mountpoint;
- mountent.mnt_type = CONST_DISCARD(char *,"cifs");
+ mountent.mnt_dir = mountpoint;
+ mountent.mnt_type = CONST_DISCARD(char *,"cifs");
mountent.mnt_opts = (char *)malloc(220);
if(mountent.mnt_opts) {
char * mount_user = getusername();
memset(mountent.mnt_opts,0,200);
if(flags & MS_RDONLY)
- strcat(mountent.mnt_opts,"ro");
+ strlcat(mountent.mnt_opts,"ro",220);
else
- strcat(mountent.mnt_opts,"rw");
+ strlcat(mountent.mnt_opts,"rw",220);
if(flags & MS_MANDLOCK)
- strcat(mountent.mnt_opts,",mand");
+ strlcat(mountent.mnt_opts,",mand",220);
if(flags & MS_NOEXEC)
- strcat(mountent.mnt_opts,",noexec");
+ strlcat(mountent.mnt_opts,",noexec",220);
if(flags & MS_NOSUID)
- strcat(mountent.mnt_opts,",nosuid");
+ strlcat(mountent.mnt_opts,",nosuid",220);
if(flags & MS_NODEV)
- strcat(mountent.mnt_opts,",nodev");
+ strlcat(mountent.mnt_opts,",nodev",220);
if(flags & MS_SYNCHRONOUS)
- strcat(mountent.mnt_opts,",synch");
+ strlcat(mountent.mnt_opts,",synch",220);
if(mount_user) {
if(getuid() != 0) {
- strcat(mountent.mnt_opts,",user=");
- strcat(mountent.mnt_opts,mount_user);
+ strlcat(mountent.mnt_opts,",user=",220);
+ strlcat(mountent.mnt_opts,mount_user,220);
}
/* free(mount_user); do not free static mem */
}
@@ -1317,4 +1352,3 @@ mount_exit:
}
return rc;
}
-
generated by cgit (git 2.34.1) at 2024-12-21 12:44:03 +0000