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-rw-r--r--source3/utils/net_usershare.c212
1 files changed, 151 insertions, 61 deletions
diff --git a/source3/utils/net_usershare.c b/source3/utils/net_usershare.c
index 19fa8fad2f..f95b1bdc6e 100644
--- a/source3/utils/net_usershare.c
+++ b/source3/utils/net_usershare.c
@@ -127,12 +127,17 @@ int net_usershare_usage(int argc, const char **argv)
/***************************************************************************
***************************************************************************/
-static void get_basepath(pstring basepath)
+static char *get_basepath(TALLOC_CTX *ctx)
{
- pstrcpy(basepath, lp_usershare_path());
+ char *basepath = talloc_strdup(ctx, lp_usershare_path());
+
+ if (!basepath) {
+ return NULL;
+ }
if ((basepath[0] != '\0') && (basepath[strlen(basepath)-1] == '/')) {
basepath[strlen(basepath)-1] = '\0';
}
+ return basepath;
}
/***************************************************************************
@@ -141,7 +146,7 @@ static void get_basepath(pstring basepath)
static int net_usershare_delete(int argc, const char **argv)
{
- pstring us_path;
+ char *us_path;
char *sharename;
if (argc != 1) {
@@ -161,9 +166,14 @@ static int net_usershare_delete(int argc, const char **argv)
return -1;
}
- pstrcpy(us_path, lp_usershare_path());
- pstrcat(us_path, "/");
- pstrcat(us_path, sharename);
+ us_path = talloc_asprintf(talloc_tos(),
+ "%s/%s",
+ lp_usershare_path(),
+ sharename);
+ if (!us_path) {
+ SAFE_FREE(sharename);
+ return -1;
+ }
if (unlink(us_path) != 0) {
d_fprintf(stderr, "net usershare delete: unable to remove usershare %s. "
@@ -196,9 +206,11 @@ static int get_share_list(TALLOC_CTX *ctx, const char *wcard, bool only_ours)
SMB_STRUCT_DIRENT *de;
uid_t myuid = geteuid();
struct file_list *fl = NULL;
- pstring basepath;
+ char *basepath = get_basepath(ctx);
- get_basepath(basepath);
+ if (!basepath) {
+ return -1;
+ }
dp = sys_opendir(basepath);
if (!dp) {
d_fprintf(stderr, "get_share_list: cannot open usershare directory %s. Error %s\n",
@@ -208,7 +220,7 @@ static int get_share_list(TALLOC_CTX *ctx, const char *wcard, bool only_ours)
while((de = sys_readdir(dp)) != 0) {
SMB_STRUCT_STAT sbuf;
- pstring path;
+ char *path;
const char *n = de->d_name;
/* Ignore . and .. */
@@ -222,9 +234,14 @@ static int get_share_list(TALLOC_CTX *ctx, const char *wcard, bool only_ours)
d_fprintf(stderr, "get_share_list: ignoring bad share name %s\n",n);
continue;
}
- pstrcpy(path, basepath);
- pstrcat(path, "/");
- pstrcat(path, n);
+ path = talloc_asprintf(ctx,
+ "%s/%s",
+ basepath,
+ n);
+ if (!path) {
+ sys_closedir(dp);
+ return -1;
+ }
if (sys_lstat(path, &sbuf) != 0) {
d_fprintf(stderr, "get_share_list: can't lstat file %s. Error was %s\n",
@@ -246,13 +263,15 @@ static int get_share_list(TALLOC_CTX *ctx, const char *wcard, bool only_ours)
continue;
}
- /* (Finally) - add to list. */
+ /* (Finally) - add to list. */
fl = TALLOC_P(ctx, struct file_list);
if (!fl) {
+ sys_closedir(dp);
return -1;
}
fl->pathname = talloc_strdup(ctx, n);
if (!fl->pathname) {
+ sys_closedir(dp);
return -1;
}
@@ -299,10 +318,10 @@ static int info_fn(struct file_list *fl, void *priv)
int fd = -1;
int numlines = 0;
SEC_DESC *psd = NULL;
- pstring basepath;
+ char *basepath;
char *sharepath = NULL;
char *comment = NULL;
- pstring acl_str;
+ char *acl_str;
int num_aces;
char sep_str[2];
enum usershare_err us_err;
@@ -311,9 +330,16 @@ static int info_fn(struct file_list *fl, void *priv)
sep_str[0] = *lp_winbind_separator();
sep_str[1] = '\0';
- get_basepath(basepath);
- pstrcat(basepath, "/");
- pstrcat(basepath, fl->pathname);
+ basepath = get_basepath(ctx);
+ if (!basepath) {
+ return -1;
+ }
+ basepath = talloc_asprintf_append(basepath,
+ "/%s",
+ fl->pathname);
+ if (!basepath) {
+ return -1;
+ }
#ifdef O_NOFOLLOW
fd = sys_open(basepath, O_RDONLY|O_NOFOLLOW, 0);
@@ -366,7 +392,10 @@ static int info_fn(struct file_list *fl, void *priv)
return -1;
}
- pstrcpy(acl_str, "usershare_acl=");
+ acl_str = talloc_strdup(ctx, "usershare_acl=");
+ if (!acl_str) {
+ return -1;
+ }
for (num_aces = 0; num_aces < psd->dacl->num_aces; num_aces++) {
const char *domain;
@@ -377,30 +406,53 @@ static int info_fn(struct file_list *fl, void *priv)
if (NT_STATUS_IS_OK(ntstatus)) {
if (domain && *domain) {
- pstrcat(acl_str, domain);
- pstrcat(acl_str, sep_str);
+ acl_str = talloc_asprintf_append(acl_str,
+ "%s%s",
+ domain,
+ sep_str);
+ if (!acl_str) {
+ return -1;
+ }
}
- pstrcat(acl_str,name);
+ acl_str = talloc_asprintf_append(acl_str,
+ "%s",
+ name);
+ if (!acl_str) {
+ return -1;
+ }
+
} else {
fstring sidstr;
sid_to_string(sidstr, &psd->dacl->aces[num_aces].trustee);
- pstrcat(acl_str,sidstr);
+ acl_str = talloc_asprintf_append(acl_str,
+ "%s",
+ sidstr);
+ if (!acl_str) {
+ return -1;
+ }
+ }
+ acl_str = talloc_asprintf_append(acl_str, ":");
+ if (!acl_str) {
+ return -1;
}
- pstrcat(acl_str, ":");
if (psd->dacl->aces[num_aces].type == SEC_ACE_TYPE_ACCESS_DENIED) {
- pstrcat(acl_str, "D,");
+ acl_str = talloc_asprintf_append(acl_str, "D,");
+ if (!acl_str) {
+ return -1;
+ }
} else {
if (psd->dacl->aces[num_aces].access_mask & GENERIC_ALL_ACCESS) {
- pstrcat(acl_str, "F,");
+ acl_str = talloc_asprintf_append(acl_str, "F,");
} else {
- pstrcat(acl_str, "R,");
+ acl_str = talloc_asprintf_append(acl_str, "R,");
+ }
+ if (!acl_str) {
+ return -1;
}
}
}
- acl_str[strlen(acl_str)-1] = '\0';
-
if (pi->op == US_INFO_OP) {
d_printf("[%s]\n", fl->pathname );
d_printf("path=%s\n", sharepath );
@@ -466,10 +518,14 @@ static int count_num_usershares(void)
{
SMB_STRUCT_DIR *dp;
SMB_STRUCT_DIRENT *de;
- pstring basepath;
int num_usershares = 0;
+ TALLOC_CTX *ctx = talloc_tos();
+ char *basepath = get_basepath(ctx);
+
+ if (!basepath) {
+ return -1;
+ }
- get_basepath(basepath);
dp = sys_opendir(basepath);
if (!dp) {
d_fprintf(stderr, "count_num_usershares: cannot open usershare directory %s. Error %s\n",
@@ -479,7 +535,7 @@ static int count_num_usershares(void)
while((de = sys_readdir(dp)) != 0) {
SMB_STRUCT_STAT sbuf;
- pstring path;
+ char *path;
const char *n = de->d_name;
/* Ignore . and .. */
@@ -493,9 +549,14 @@ static int count_num_usershares(void)
d_fprintf(stderr, "count_num_usershares: ignoring bad share name %s\n",n);
continue;
}
- pstrcpy(path, basepath);
- pstrcat(path, "/");
- pstrcat(path, n);
+ path = talloc_asprintf(ctx,
+ "%s/%s",
+ basepath,
+ n);
+ if (!path) {
+ sys_closedir(dp);
+ return -1;
+ }
if (sys_lstat(path, &sbuf) != 0) {
d_fprintf(stderr, "count_num_usershares: can't lstat file %s. Error was %s\n",
@@ -521,12 +582,12 @@ static int count_num_usershares(void)
static int net_usershare_add(int argc, const char **argv)
{
- TALLOC_CTX *ctx = NULL;
+ TALLOC_CTX *ctx = talloc_stackframe();
SMB_STRUCT_STAT sbuf;
SMB_STRUCT_STAT lsbuf;
char *sharename;
- pstring full_path;
- pstring full_path_tmp;
+ char *full_path;
+ char *full_path_tmp;
const char *us_path;
const char *us_comment;
const char *arg_acl;
@@ -573,6 +634,7 @@ static int net_usershare_add(int argc, const char **argv)
arg_acl = "S-1-1-0:R";
}
if (!strnequal(argv[4], "guest_ok=", 9)) {
+ TALLOC_FREE(ctx);
return net_usershare_add_usage(argc, argv);
}
switch (argv[4][9]) {
@@ -584,7 +646,8 @@ static int net_usershare_add(int argc, const char **argv)
case 'N':
guest_ok = False;
break;
- default:
+ default:
+ TALLOC_FREE(ctx);
return net_usershare_add_usage(argc, argv);
}
break;
@@ -595,6 +658,7 @@ static int net_usershare_add(int argc, const char **argv)
if (num_usershares >= lp_usershare_max_shares()) {
d_fprintf(stderr, "net usershare add: maximum number of allowed usershares (%d) reached\n",
lp_usershare_max_shares() );
+ TALLOC_FREE(ctx);
SAFE_FREE(sharename);
return -1;
}
@@ -603,6 +667,7 @@ static int net_usershare_add(int argc, const char **argv)
d_fprintf(stderr, "net usershare add: share name %s contains "
"invalid characters (any of %s)\n",
sharename, INVALID_SHARENAME_CHARS);
+ TALLOC_FREE(ctx);
SAFE_FREE(sharename);
return -1;
}
@@ -611,21 +676,41 @@ static int net_usershare_add(int argc, const char **argv)
if (getpwnam(sharename)) {
d_fprintf(stderr, "net usershare add: share name %s is already a valid system user name\n",
sharename );
+ TALLOC_FREE(ctx);
SAFE_FREE(sharename);
return -1;
}
/* Construct the full path for the usershare file. */
- get_basepath(full_path);
- pstrcat(full_path, "/");
- pstrcpy(full_path_tmp, full_path);
- pstrcat(full_path, sharename);
- pstrcat(full_path_tmp, ":tmpXXXXXX");
+ full_path = get_basepath(ctx);
+ if (!full_path) {
+ TALLOC_FREE(ctx);
+ SAFE_FREE(sharename);
+ return -1;
+ }
+ full_path_tmp = talloc_asprintf(ctx,
+ "%s/:tmpXXXXXX",
+ full_path);
+ if (!full_path_tmp) {
+ TALLOC_FREE(ctx);
+ SAFE_FREE(sharename);
+ return -1;
+ }
+
+ full_path = talloc_asprintf_append(full_path,
+ "/%s",
+ sharename);
+ if (!full_path) {
+ TALLOC_FREE(ctx);
+ SAFE_FREE(sharename);
+ return -1;
+ }
/* The path *must* be absolute. */
if (us_path[0] != '/') {
d_fprintf(stderr,"net usershare add: path %s is not an absolute path.\n",
us_path);
+ TALLOC_FREE(ctx);
SAFE_FREE(sharename);
return -1;
}
@@ -635,6 +720,7 @@ static int net_usershare_add(int argc, const char **argv)
d_fprintf(stderr, "net usershare add: cannot stat path %s to ensure "
"this is a directory. Error was %s\n",
us_path, strerror(errno) );
+ TALLOC_FREE(ctx);
SAFE_FREE(sharename);
return -1;
}
@@ -642,6 +728,7 @@ static int net_usershare_add(int argc, const char **argv)
if (!S_ISDIR(sbuf.st_mode)) {
d_fprintf(stderr, "net usershare add: path %s is not a directory.\n",
us_path );
+ TALLOC_FREE(ctx);
SAFE_FREE(sharename);
return -1;
}
@@ -655,6 +742,7 @@ static int net_usershare_add(int argc, const char **argv)
"\tAsk the administrator to add the line \"usershare owner only = False\" \n"
"\tto the [global] section of the smb.conf to allow this.\n",
us_path );
+ TALLOC_FREE(ctx);
SAFE_FREE(sharename);
return -1;
}
@@ -663,10 +751,12 @@ static int net_usershare_add(int argc, const char **argv)
acl string. Convert names to SID's as needed. Then run it through
parse_usershare_acl to ensure it's valid. */
- ctx = talloc_init("share_info");
-
/* Start off the string we'll append to. */
us_acl = talloc_strdup(ctx, "");
+ if (!us_acl) {
+ TALLOC_FREE(ctx);
+ return -1;
+ }
pacl = arg_acl;
num_aces = 1;
@@ -682,7 +772,7 @@ static int net_usershare_add(int argc, const char **argv)
if (pcolon == NULL) {
d_fprintf(stderr, "net usershare add: malformed acl %s (missing ':').\n",
pacl );
- talloc_destroy(ctx);
+ TALLOC_FREE(ctx);
SAFE_FREE(sharename);
return -1;
}
@@ -698,7 +788,7 @@ static int net_usershare_add(int argc, const char **argv)
d_fprintf(stderr, "net usershare add: malformed acl %s "
"(access control must be 'r', 'f', or 'd')\n",
pacl );
- talloc_destroy(ctx);
+ TALLOC_FREE(ctx);
SAFE_FREE(sharename);
return -1;
}
@@ -706,7 +796,7 @@ static int net_usershare_add(int argc, const char **argv)
if (pcolon[2] != ',' && pcolon[2] != '\0') {
d_fprintf(stderr, "net usershare add: malformed terminating character for acl %s\n",
pacl );
- talloc_destroy(ctx);
+ TALLOC_FREE(ctx);
SAFE_FREE(sharename);
return -1;
}
@@ -714,7 +804,7 @@ static int net_usershare_add(int argc, const char **argv)
/* Get the name */
if ((name = talloc_strndup(ctx, pacl, pcolon - pacl)) == NULL) {
d_fprintf(stderr, "talloc_strndup failed\n");
- talloc_destroy(ctx);
+ TALLOC_FREE(ctx);
SAFE_FREE(sharename);
return -1;
}
@@ -729,7 +819,7 @@ static int net_usershare_add(int argc, const char **argv)
} else {
d_fprintf(stderr, "\n");
}
- talloc_destroy(ctx);
+ TALLOC_FREE(ctx);
SAFE_FREE(sharename);
return -1;
}
@@ -749,7 +839,7 @@ static int net_usershare_add(int argc, const char **argv)
d_fprintf(stderr, "net usershare add: guest_ok=y requested "
"but the \"usershare allow guests\" parameter is not enabled "
"by this server.\n");
- talloc_destroy(ctx);
+ TALLOC_FREE(ctx);
SAFE_FREE(sharename);
return -1;
}
@@ -760,7 +850,7 @@ static int net_usershare_add(int argc, const char **argv)
if (tmpfd == -1) {
d_fprintf(stderr, "net usershare add: cannot create tmp file %s\n",
full_path_tmp );
- talloc_destroy(ctx);
+ TALLOC_FREE(ctx);
SAFE_FREE(sharename);
return -1;
}
@@ -769,7 +859,7 @@ static int net_usershare_add(int argc, const char **argv)
if (sys_lstat(full_path_tmp, &lsbuf) != 0) {
d_fprintf(stderr, "net usershare add: cannot lstat tmp file %s\n",
full_path_tmp );
- talloc_destroy(ctx);
+ TALLOC_FREE(ctx);
SAFE_FREE(sharename);
return -1;
}
@@ -778,7 +868,7 @@ static int net_usershare_add(int argc, const char **argv)
if (sys_fstat(tmpfd, &sbuf) != 0) {
d_fprintf(stderr, "net usershare add: cannot fstat tmp file %s\n",
full_path_tmp );
- talloc_destroy(ctx);
+ TALLOC_FREE(ctx);
SAFE_FREE(sharename);
return -1;
}
@@ -786,15 +876,15 @@ static int net_usershare_add(int argc, const char **argv)
if (!S_ISREG(sbuf.st_mode) || sbuf.st_dev != lsbuf.st_dev || sbuf.st_ino != lsbuf.st_ino) {
d_fprintf(stderr, "net usershare add: tmp file %s is not a regular file ?\n",
full_path_tmp );
- talloc_destroy(ctx);
+ TALLOC_FREE(ctx);
SAFE_FREE(sharename);
return -1;
}
-
+
if (fchmod(tmpfd, 0644) == -1) {
d_fprintf(stderr, "net usershare add: failed to fchmod tmp file %s to 0644n",
full_path_tmp );
- talloc_destroy(ctx);
+ TALLOC_FREE(ctx);
SAFE_FREE(sharename);
return -1;
}
@@ -810,7 +900,7 @@ static int net_usershare_add(int argc, const char **argv)
d_fprintf(stderr, "net usershare add: failed to write %u bytes to file %s. Error was %s\n",
(unsigned int)to_write, full_path_tmp, strerror(errno));
unlink(full_path_tmp);
- talloc_destroy(ctx);
+ TALLOC_FREE(ctx);
SAFE_FREE(sharename);
return -1;
}
@@ -820,14 +910,13 @@ static int net_usershare_add(int argc, const char **argv)
unlink(full_path_tmp);
d_fprintf(stderr, "net usershare add: failed to add share %s. Error was %s\n",
sharename, strerror(errno));
- talloc_destroy(ctx);
+ TALLOC_FREE(ctx);
close(tmpfd);
SAFE_FREE(sharename);
return -1;
}
close(tmpfd);
- talloc_destroy(ctx);
if (opt_long_list_entries) {
const char *my_argv[2];
@@ -837,6 +926,7 @@ static int net_usershare_add(int argc, const char **argv)
}
SAFE_FREE(sharename);
+ TALLOC_FREE(ctx);
return 0;
}