* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * GNU Lesser General Public License for more details.
*/
/*
* This file contains misc utility functions and wrappers to standard
* functions, which throw exceptions upon failure.
*/
+#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <unistd.h>
#include <ctype.h>
#include <fcntl.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <libgen.h>
-#define LINEBUF 32
-#define LINEBUF_MAX 4096
+#include "uci.h"
+#include "uci_internal.h"
-__plugin void *uci_malloc(struct uci_context *ctx, size_t size)
+__private void *uci_malloc(struct uci_context *ctx, size_t size)
{
void *ptr;
return ptr;
}
-__plugin void *uci_realloc(struct uci_context *ctx, void *ptr, size_t size)
+__private void *uci_realloc(struct uci_context *ctx, void *ptr, size_t size)
{
ptr = realloc(ptr, size);
if (!ptr)
return ptr;
}
-__plugin char *uci_strdup(struct uci_context *ctx, const char *str)
+__private char *uci_strdup(struct uci_context *ctx, const char *str)
{
char *ptr;
return ptr;
}
-/* Based on an efficient hash function published by D. J. Bernstein */
-static unsigned int djbhash(unsigned int hash, char *str)
-{
- int len = strlen(str);
- int i;
-
- /* initial value */
- if (hash == ~0)
- hash = 5381;
-
- for(i = 0; i < len; i++) {
- hash = ((hash << 5) + hash) + str[i];
- }
- return (hash & 0x7FFFFFFF);
-}
-
/*
* validate strings for names and types, reject special characters
* for names, only alphanum and _ is allowed (shell compatibility)
* for types, we allow more characters
*/
-__plugin bool uci_validate_str(const char *str, bool name)
+__private bool uci_validate_str(const char *str, bool name, bool package)
{
if (!*str)
return false;
- while (*str) {
+ for (; *str; str++) {
unsigned char c = *str;
- if (!isalnum(c) && c != '_') {
- if (name || (c < 33) || (c > 126))
- return false;
- }
- str++;
- }
- return true;
-}
-static inline bool uci_validate_package(const char *str)
-{
- return uci_validate_str(str, false);
-}
+ if (isalnum(c) || c == '_')
+ continue;
-static inline bool uci_validate_type(const char *str)
-{
- return uci_validate_str(str, false);
-}
+ if (c == '-' && package)
+ continue;
-static inline bool uci_validate_name(const char *str)
-{
- return uci_validate_str(str, true);
+ if (name || (c < 33) || (c > 126))
+ return false;
+ }
+ return true;
}
bool uci_validate_text(const char *str)
{
while (*str) {
unsigned char c = *str;
- if ((c == '\r') || (c == '\n') ||
- ((c < 32) && (c != '\t')))
+
+ if (c < 32 && c != '\t' && c != '\n' && c != '\r')
return false;
+
str++;
}
return true;
}
-static void uci_alloc_parse_context(struct uci_context *ctx)
+__private void uci_alloc_parse_context(struct uci_context *ctx)
{
ctx->pctx = (struct uci_parse_context *) uci_malloc(ctx, sizeof(struct uci_parse_context));
}
}
-static void uci_parse_error(struct uci_context *ctx, char *pos, char *reason)
+__private void uci_parse_error(struct uci_context *ctx, char *reason)
{
struct uci_parse_context *pctx = ctx->pctx;
pctx->reason = reason;
- pctx->byte = pos - pctx->buf;
+ pctx->byte = pctx_pos(pctx);
UCI_THROW(ctx, UCI_ERR_PARSE);
}
-/*
- * Fetch a new line from the input stream and resize buffer if necessary
- */
-static void uci_getln(struct uci_context *ctx, int offset)
-{
- struct uci_parse_context *pctx = ctx->pctx;
- char *p;
- int ofs;
-
- if (pctx->buf == NULL) {
- pctx->buf = uci_malloc(ctx, LINEBUF);
- pctx->bufsz = LINEBUF;
- }
-
- ofs = offset;
- do {
- p = &pctx->buf[ofs];
- p[ofs] = 0;
-
- p = fgets(p, pctx->bufsz - ofs, pctx->file);
- if (!p || !*p)
- return;
-
- ofs += strlen(p);
- if (pctx->buf[ofs - 1] == '\n') {
- pctx->line++;
- pctx->buf[ofs - 1] = 0;
- return;
- }
-
- if (pctx->bufsz > LINEBUF_MAX/2)
- uci_parse_error(ctx, p, "line too long");
-
- pctx->bufsz *= 2;
- pctx->buf = uci_realloc(ctx, pctx->buf, pctx->bufsz);
- } while (1);
-}
-
-/*
- * parse a character escaped by '\'
- * returns true if the escaped character is to be parsed
- * returns false if the escaped character is to be ignored
- */
-static inline bool parse_backslash(struct uci_context *ctx, char **str)
-{
- /* skip backslash */
- *str += 1;
-
- /* undecoded backslash at the end of line, fetch the next line */
- if (!**str) {
- *str += 1;
- uci_getln(ctx, *str - ctx->pctx->buf);
- return false;
- }
-
- /* FIXME: decode escaped char, necessary? */
- return true;
-}
-
-/*
- * move the string pointer forward until a non-whitespace character or
- * EOL is reached
- */
-static void skip_whitespace(struct uci_context *ctx, char **str)
-{
-restart:
- while (**str && isspace(**str))
- *str += 1;
-
- if (**str == '\\') {
- if (!parse_backslash(ctx, str))
- goto restart;
- }
-}
-
-static inline void addc(char **dest, char **src)
-{
- **dest = **src;
- *dest += 1;
- *src += 1;
-}
-
-/*
- * parse a double quoted string argument from the command line
- */
-static void parse_double_quote(struct uci_context *ctx, char **str, char **target)
-{
- char c;
-
- /* skip quote character */
- *str += 1;
-
- while ((c = **str)) {
- switch(c) {
- case '"':
- **target = 0;
- *str += 1;
- return;
- case '\\':
- if (!parse_backslash(ctx, str))
- continue;
- /* fall through */
- default:
- addc(target, str);
- break;
- }
- }
- uci_parse_error(ctx, *str, "unterminated \"");
-}
-
-/*
- * parse a single quoted string argument from the command line
- */
-static void parse_single_quote(struct uci_context *ctx, char **str, char **target)
-{
- char c;
- /* skip quote character */
- *str += 1;
-
- while ((c = **str)) {
- switch(c) {
- case '\'':
- **target = 0;
- *str += 1;
- return;
- default:
- addc(target, str);
- }
- }
- uci_parse_error(ctx, *str, "unterminated '");
-}
-
-/*
- * parse a string from the command line and detect the quoting style
- */
-static void parse_str(struct uci_context *ctx, char **str, char **target)
-{
- bool next = true;
- do {
- switch(**str) {
- case '\'':
- parse_single_quote(ctx, str, target);
- break;
- case '"':
- parse_double_quote(ctx, str, target);
- break;
- case '#':
- **str = 0;
- /* fall through */
- case 0:
- goto done;
- case ';':
- next = false;
- goto done;
- case '\\':
- if (!parse_backslash(ctx, str))
- continue;
- /* fall through */
- default:
- addc(target, str);
- break;
- }
- } while (**str && !isspace(**str));
-done:
-
- /*
- * if the string was unquoted and we've stopped at a whitespace
- * character, skip to the next one, because the whitespace will
- * be overwritten by a null byte here
- */
- if (**str && next)
- *str += 1;
-
- /* terminate the parsed string */
- **target = 0;
-}
-
-/*
- * extract the next argument from the command line
- */
-static char *next_arg(struct uci_context *ctx, char **str, bool required, bool name)
-{
- char *val;
- char *ptr;
-
- val = ptr = *str;
- skip_whitespace(ctx, str);
- if(*str[0] == ';') {
- *str[0] = 0;
- *str += 1;
- } else {
- parse_str(ctx, str, &ptr);
- }
- if (!*val) {
- if (required)
- uci_parse_error(ctx, *str, "insufficient arguments");
- goto done;
- }
-
- if (name && !uci_validate_name(val))
- uci_parse_error(ctx, val, "invalid character in field");
-
-done:
- return val;
-}
-
-int uci_parse_argument(struct uci_context *ctx, FILE *stream, char **str, char **result)
-{
- UCI_HANDLE_ERR(ctx);
- UCI_ASSERT(ctx, str != NULL);
- UCI_ASSERT(ctx, result != NULL);
-
- if (ctx->pctx && (ctx->pctx->file != stream))
- uci_cleanup(ctx);
-
- if (!ctx->pctx)
- uci_alloc_parse_context(ctx);
-
- ctx->pctx->file = stream;
-
- if (!*str) {
- uci_getln(ctx, 0);
- *str = ctx->pctx->buf;
- }
-
- *result = next_arg(ctx, str, false, false);
-
- return 0;
-}
-
/*
* open a stream and go to the right position
* note: when opening for write and seeking to the beginning of
* the stream, truncate the file
*/
-static FILE *uci_open_stream(struct uci_context *ctx, const char *filename, int pos, bool write, bool create)
+__private FILE *uci_open_stream(struct uci_context *ctx, const char *filename, const char *origfilename, int pos, bool write, bool create)
{
struct stat statbuf;
FILE *file = NULL;
int fd, ret;
- int mode = (write ? O_RDWR : O_RDONLY);
+ int flags = (write ? O_RDWR : O_RDONLY);
+ mode_t mode = UCI_FILEMODE;
+ char *name = NULL;
+ char *filename2 = NULL;
+
+ if (create) {
+ flags |= O_CREAT;
+ if (origfilename) {
+ name = basename((char *) origfilename);
+ } else {
+ name = basename((char *) filename);
+ }
+ if ((asprintf(&filename2, "%s/%s", ctx->confdir, name) < 0) || !filename2) {
+ UCI_THROW(ctx, UCI_ERR_MEM);
+ } else {
+ if (stat(filename2, &statbuf) == 0)
+ mode = statbuf.st_mode;
- if (create)
- mode |= O_CREAT;
+ free(filename2);
+ }
+ }
if (!write && ((stat(filename, &statbuf) < 0) ||
- ((statbuf.st_mode & S_IFMT) != S_IFREG))) {
+ ((statbuf.st_mode & S_IFMT) != S_IFREG))) {
UCI_THROW(ctx, UCI_ERR_NOTFOUND);
}
- fd = open(filename, mode, UCI_FILEMODE);
+ fd = open(filename, flags, mode);
if (fd < 0)
goto error;
- if (flock(fd, (write ? LOCK_EX : LOCK_SH)) < 0)
+ ret = flock(fd, (write ? LOCK_EX : LOCK_SH));
+ if ((ret < 0) && (errno != ENOSYS))
goto error;
ret = lseek(fd, 0, pos);
return file;
}
-static void uci_close_stream(FILE *stream)
+__private void uci_close_stream(FILE *stream)
{
int fd;
projects / project / uci.git / blobdiff