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-rw-r--r--coreutils/ls.c8
-rw-r--r--coreutils/rm.c2
-rw-r--r--include/libbb.h1
-rw-r--r--libbb/concat_subpath_file.c2
-rw-r--r--libbb/find_root_device.c59
-rw-r--r--libbb/simplify_path.c11
-rw-r--r--miscutils/devfsd.c2
-rw-r--r--networking/httpd.c10
-rw-r--r--shell/ash.c3
9 files changed, 71 insertions, 27 deletions
diff --git a/coreutils/ls.c b/coreutils/ls.c
index 7bbb19d6c..b9c07adf8 100644
--- a/coreutils/ls.c
+++ b/coreutils/ls.c
@@ -504,11 +504,11 @@ static struct dnode **list_dir(const char *path)
/* are we going to list the file- it may be . or .. or a hidden file */
if (entry->d_name[0] == '.') {
- if ((entry->d_name[1] == 0 || (
- entry->d_name[1] == '.'
- && entry->d_name[2] == 0))
- && !(all_fmt & DISP_DOT))
+ if ((!entry->d_name[1] || (entry->d_name[1] == '.' && !entry->d_name[2]))
+ && !(all_fmt & DISP_DOT)
+ ) {
continue;
+ }
if (!(all_fmt & DISP_HIDDEN))
continue;
}
diff --git a/coreutils/rm.c b/coreutils/rm.c
index 61e3e7010..e29073db8 100644
--- a/coreutils/rm.c
+++ b/coreutils/rm.c
@@ -40,7 +40,7 @@ int rm_main(int argc, char **argv)
do {
const char *base = bb_get_last_path_component(*argv);
- if ((base[0] == '.') && (!base[1] || ((base[1] == '.') && !base[2]))) {
+ if (DOT_OR_DOTDOT(base)) {
bb_error_msg("cannot remove '.' or '..'");
} else if (remove_file(*argv, flags) >= 0) {
continue;
diff --git a/include/libbb.h b/include/libbb.h
index 29ee8daae..212b048de 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -405,6 +405,7 @@ extern char *xasprintf(const char *format, ...) __attribute__ ((format (printf,
#define NOT_LONE_DASH(s) ((s)[0] != '-' || (s)[1])
#define LONE_CHAR(s,c) ((s)[0] == (c) && !(s)[1])
#define NOT_LONE_CHAR(s,c) ((s)[0] != (c) || (s)[1])
+#define DOT_OR_DOTDOT(s) ((s)[0] == '.' && (!(s)[1] || ((s)[1] == '.' && !(s)[2])))
/* dmalloc will redefine these to it's own implementation. It is safe
* to have the prototypes here unconditionally. */
diff --git a/libbb/concat_subpath_file.c b/libbb/concat_subpath_file.c
index 6bbe49ab5..1c0058889 100644
--- a/libbb/concat_subpath_file.c
+++ b/libbb/concat_subpath_file.c
@@ -17,7 +17,7 @@
char *concat_subpath_file(const char *path, const char *f)
{
- if (f && *f == '.' && (!f[1] || (f[1] == '.' && !f[2])))
+ if (f && DOT_OR_DOTDOT(f))
return NULL;
return concat_path_file(path, f);
}
diff --git a/libbb/find_root_device.c b/libbb/find_root_device.c
index ea360eae5..7182102c7 100644
--- a/libbb/find_root_device.c
+++ b/libbb/find_root_device.c
@@ -9,26 +9,65 @@
#include "libbb.h"
-char *find_block_device(const char *path)
+/* Find block device /dev/XXX which contains specified file
+ * We handle /dev/dir/dir/dir too, at a cost of ~80 more bytes code */
+
+/* Do not reallocate all this stuff on each recursion */
+enum { DEVNAME_MAX = 256 };
+struct arena {
+ struct stat st;
+ dev_t dev;
+ /* Was PATH_MAX, but we recurse _/dev_. We can assume
+ * people are not crazy enough to have mega-deep tree there */
+ char devpath[DEVNAME_MAX];
+};
+
+static char *find_block_device_in_dir(struct arena *ap)
{
DIR *dir;
struct dirent *entry;
- struct stat st;
- dev_t dev;
- char *retpath=NULL;
+ char *retpath = NULL;
+ int len, rem;
+
+ dir = opendir(ap->devpath);
+ if (!dir)
+ return NULL;
- if (stat(path, &st) || !(dir = opendir("/dev")))
+ len = strlen(ap->devpath);
+ rem = DEVNAME_MAX-2 - len;
+ if (rem <= 0)
return NULL;
- dev = (st.st_mode & S_IFMT) == S_IFBLK ? st.st_rdev : st.st_dev;
+ ap->devpath[len++] = '/';
+
while ((entry = readdir(dir)) != NULL) {
- char devpath[PATH_MAX];
- sprintf(devpath,"/dev/%s", entry->d_name);
- if (!stat(devpath, &st) && S_ISBLK(st.st_mode) && st.st_rdev == dev) {
- retpath = xstrdup(devpath);
+ safe_strncpy(ap->devpath + len, entry->d_name, rem);
+ if (stat(ap->devpath, &ap->st) != 0)
+ continue;
+ if (S_ISBLK(ap->st.st_mode) && ap->st.st_rdev == ap->dev) {
+ retpath = xstrdup(ap->devpath);
break;
}
+ if (S_ISDIR(ap->st.st_mode)) {
+ /* Do not recurse for '.' and '..' */
+ if (DOT_OR_DOTDOT(entry->d_name))
+ continue;
+ retpath = find_block_device_in_dir(ap);
+ if (retpath)
+ break;
+ }
}
closedir(dir);
return retpath;
}
+
+char *find_block_device(const char *path)
+{
+ struct arena a;
+
+ if (stat(path, &a.st) != 0)
+ return NULL;
+ a.dev = S_ISBLK(a.st.st_mode) ? a.st.st_rdev : a.st.st_dev;
+ strcpy(a.devpath, "/dev");
+ return find_block_device_in_dir(&a);
+}
diff --git a/libbb/simplify_path.c b/libbb/simplify_path.c
index 7e68e3911..29e371df6 100644
--- a/libbb/simplify_path.c
+++ b/libbb/simplify_path.c
@@ -26,13 +26,16 @@ char *bb_simplify_path(const char *path)
if (*p == '/') {
if (*s == '/') { /* skip duplicate (or initial) slash */
continue;
- } else if (*s == '.') {
- if (s[1] == '/' || s[1] == 0) { /* remove extra '.' */
+ }
+ if (*s == '.') {
+ if (s[1] == '/' || !s[1]) { /* remove extra '.' */
continue;
- } else if ((s[1] == '.') && (s[2] == '/' || s[2] == 0)) {
+ }
+ if ((s[1] == '.') && (s[2] == '/' || !s[2])) {
++s;
if (p > start) {
- while (*--p != '/'); /* omit previous dir */
+ while (*--p != '/') /* omit previous dir */
+ continue;
}
continue;
}
diff --git a/miscutils/devfsd.c b/miscutils/devfsd.c
index 0069b280e..d1a5163d2 100644
--- a/miscutils/devfsd.c
+++ b/miscutils/devfsd.c
@@ -1369,7 +1369,7 @@ static void dir_operation(int type, const char * dir_name, int var, unsigned lon
while ( (de = readdir (dp) ) != NULL )
{
- if(de->d_name && *de->d_name == '.' && (!de->d_name[1] || (de->d_name[1] == '.' && !de->d_name[2])))
+ if(de->d_name && DOT_OR_DOTDOT(de->d_name))
continue;
snprintf (path, sizeof (path), "%s/%s", dir_name, de->d_name);
debug_msg_logger(LOG_ERR, "%s: %s", __FUNCTION__, path);
diff --git a/networking/httpd.c b/networking/httpd.c
index d80df937a..1f7c886de 100644
--- a/networking/httpd.c
+++ b/networking/httpd.c
@@ -1573,7 +1573,7 @@ static void handleIncoming(void)
}
/* algorithm stolen from libbb bb_simplify_path(),
- but don't strdup and reducing trailing slash and protect out root */
+ * but don't strdup and reducing trailing slash and protect out root */
purl = test = url;
do {
if (*purl == '/') {
@@ -1583,18 +1583,18 @@ static void handleIncoming(void)
}
if (*test == '.') {
/* skip extra '.' */
- if (test[1] == '/' || test[1] == 0) {
+ if (test[1] == '/' || !test[1]) {
continue;
- } else
+ }
/* '..': be careful */
- if (test[1] == '.' && (test[2] == '/' || test[2] == 0)) {
+ if (test[1] == '.' && (test[2] == '/' || !test[2])) {
++test;
if (purl == url) {
/* protect out root */
goto BAD_REQUEST;
}
while (*--purl != '/') /* omit previous dir */;
- continue;
+ continue;
}
}
}
diff --git a/shell/ash.c b/shell/ash.c
index f8207a6cc..63f039df4 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -2293,7 +2293,8 @@ updatepwd(const char *dir)
break;
}
break;
- } else if (p[1] == '\0')
+ }
+ if (p[1] == '\0')
break;
/* fall through */
default:
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 22:01:47 +0000