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rewrite path normalize function

This commit is contained in:
sunphsjtu 2021-04-29 17:10:26 +08:00
parent 5d13421ae8
commit af847cc62e
2 changed files with 72 additions and 80 deletions
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146
fs/shared/src/iot-vfs.c
View File

@ -59,94 +59,86 @@ static struct MountPoint *GetMountPoint(const char *path)
return mp;
}
char *GetAbsolutePath(const char *parent, const char *filename)
char *GetAbsolutePath(const char *path)
{
char *abspath;
char *dst0, *dst, *src;
char *abspath, *tmp;
char *prev, *curr;
int len;
NULL_PARAM_CHECK(filename != NULL);
NULL_PARAM_CHECK(path);
if (parent == NULL)
parent = working_dir;
if (filename[0] != '/') {
abspath = (char *)malloc(strlen(parent) + strlen(filename) + 2);
if (abspath == NULL)
if (path[0] == '/') {
len = strlen(path) + 1;
tmp = (char *)malloc(len);
if (tmp == NULL)
return NULL;
snprintf(abspath, strlen(parent) + strlen(filename) + 2,
"%s/%s", parent, filename);
strcpy(tmp, path);
} else {
abspath = strdup(filename);
if (abspath == NULL)
len = strlen(working_dir) + strlen(path) + 2;
tmp = (char *)malloc(len);
if (tmp == NULL)
return NULL;
strcpy(tmp, working_dir);
strcat(tmp, "/");
strcat(tmp, path);
}
src = abspath;
dst = abspath;
abspath = (char *)malloc(len);
if (abspath == NULL) {
free(tmp);
return NULL;
}
memset(abspath, 0, len);
dst0 = dst;
while (1) {
char c = *src;
for (curr = tmp; curr < tmp + len; curr++)
if (*curr == '/')
*curr = '\0';
if (c == '.') {
if (!src[1]) {
src++;
} else if (src[1] == '/') {
src += 2;
while ((*src == '/') && (*src != '\0'))
src ++;
continue;
} else if (src[1] == '.') {
if (!src[2]) {
src += 2;
goto up_one;
} else if (src[2] == '/') {
src += 3;
while ((*src == '/') && (*src != '\0'))
src ++;
goto up_one;
curr = tmp;
while (curr < tmp + len) {
if (*curr == '\0') {
curr++;
continue;
}
if (*curr == '.') {
if (strlen(curr) == 1) {
*curr = '\0';
curr++;
} else if (strlen(curr) == 2 && *(curr + 1) == '.') {
prev = curr - 1;
while (prev >= tmp && *prev == '\0')
prev--;
if (prev >= tmp) {
while (prev > tmp && *(prev - 1) != '\0')
prev--;
memset(prev, 0, strlen(prev));
}
*curr = *(curr + 1) = '\0';
curr += 2;
}
} else {
curr += strlen(curr);
}
while ((c = *src++) != '\0' && c != '/')
*dst++ = c;
if (c == '/') {
*dst ++ = '/';
while (c == '/')
c = *src++;
src --;
} else if (!c) {
break;
}
continue;
up_one:
dst--;
if (dst < dst0) {
free(abspath);
return NULL;
}
while (dst0 < dst && dst[-1] != '/')
dst --;
}
*dst = '\0';
curr = tmp;
while (curr < tmp + len) {
if (*curr == '\0') {
curr++;
} else {
strcat(abspath, "/");
strcat(abspath, curr);
curr += strlen(curr);
}
}
dst --;
if ((dst != abspath) && (*dst == '/'))
*dst = '\0';
if ('\0' == abspath[0]) {
if (abspath[0] == '\0') {
abspath[0] = '/';
abspath[1] = '\0';
}
free(tmp);
return abspath;
}
@ -453,7 +445,7 @@ int open(const char *path, int flags, ...)
return -1;
}
abspath = GetAbsolutePath(NULL, path);
abspath = GetAbsolutePath(path);
mp = GetMountPoint(abspath);
if (mp == NULL) {
SYS_ERR("%s: mount point not found\n", __func__);
@ -647,8 +639,8 @@ int rename(const char *from, const char *to)
return -1;
}
abs_from = GetAbsolutePath(NULL, from);
abs_to = GetAbsolutePath(NULL, to);
abs_from = GetAbsolutePath(from);
abs_to = GetAbsolutePath(to);
mp_from = GetMountPoint(abs_from);
mp_to = GetMountPoint(abs_to);
if (mp_from == NULL || mp_from != mp_to) {
@ -692,7 +684,7 @@ int unlink(const char *path)
return -1;
}
abspath = GetAbsolutePath(NULL, path);
abspath = GetAbsolutePath(path);
mp = GetMountPoint(abspath);
if (mp == NULL) {
SYS_ERR("%s: no mount point found\n", __func__);
@ -734,7 +726,7 @@ int stat(const char *path, struct stat *buf)
return -1;
}
abspath = GetAbsolutePath(NULL, path);
abspath = GetAbsolutePath(path);
if (strcmp(abspath, "/") == 0) {
buf->st_dev = 0;
@ -879,7 +871,7 @@ int mkdir(const char *path, mode_t mode)
return -1;
}
abspath = GetAbsolutePath(NULL, path);
abspath = GetAbsolutePath(path);
mp = GetMountPoint(abspath);
if (mp == NULL) {
SYS_ERR("%s: no mount point found\n", __func__);
@ -929,7 +921,7 @@ DIR *opendir(const char *path)
}
memset(fdp, 0, sizeof(struct FileDescriptor));
abspath = GetAbsolutePath(NULL, path);
abspath = GetAbsolutePath(path);
mp = GetMountPoint(abspath);
if (mp == NULL) {
SYS_ERR("%s: no mount point found\n", __func__);
@ -1054,7 +1046,7 @@ int chdir(const char *path)
}
closedir(dirp);
abspath = GetAbsolutePath(NULL, path);
abspath = GetAbsolutePath(path);
KMutexObtain(working_dir_lock, WAITING_FOREVER);
strcpy(working_dir, abspath);
@ -1126,7 +1118,7 @@ int statfs(const char *path, struct statfs *buf)
return -1;
}
abspath = GetAbsolutePath(NULL, path);
abspath = GetAbsolutePath(path);
mp = GetMountPoint(abspath);
if (mp == NULL) {
SYS_ERR("%s: no mount point found\n", __func__);

6
tool/shell/letter-shell/file_ext/msh_file.c
View File

@ -168,10 +168,10 @@ static int copy(const char *from, const char *to)
int abs_from_len, abs_to_len;
char *last_name;
int last_name_len;
char *GetAbsolutePath(const char *parent, const char *filename);
char *GetAbsolutePath(const char *path);
abs_from = GetAbsolutePath(NULL, from);
abs_to = GetAbsolutePath(NULL, to);
abs_from = GetAbsolutePath(from);
abs_to = GetAbsolutePath(to);
if (abs_from == NULL || abs_to == NULL)
goto err;