* 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.
*/
/*
#define _GNU_SOURCE
#include <sys/types.h>
+#include <sys/stat.h>
#include <sys/file.h>
#include <stdbool.h>
#include <unistd.h>
#include <stdio.h>
#include <ctype.h>
#include <glob.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "uci.h"
+#include "uci_internal.h"
+
+#define LINEBUF 32
+#define LINEBUF_MAX 4096
+
+/*
+ * Fetch a new line from the input stream and resize buffer if necessary
+ */
+__private 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;
+ }
+ /* It takes 2 slots for fgets to read 1 char. */
+ if (offset >= pctx->bufsz - 1) {
+ pctx->bufsz *= 2;
+ pctx->buf = uci_realloc(ctx, pctx->buf, pctx->bufsz);
+ }
+
+ ofs = offset;
+ do {
+ p = &pctx->buf[ofs];
+ p[0] = 0;
+
+ p = fgets(p, pctx->bufsz - ofs, pctx->file);
+ if (!p || !*p)
+ return;
+
+ ofs += strlen(p);
+ if (pctx->buf[ofs - 1] == '\n') {
+ pctx->line++;
+ return;
+ }
+
+ if (pctx->bufsz > LINEBUF_MAX/2)
+ uci_parse_error(ctx, "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 bool parse_backslash(struct uci_context *ctx)
+{
+ struct uci_parse_context *pctx = ctx->pctx;
+
+ /* skip backslash */
+ pctx->pos += 1;
+
+ /* undecoded backslash at the end of line, fetch the next line */
+ if (!pctx_cur_char(pctx) ||
+ pctx_cur_char(pctx) == '\n' ||
+ (pctx_cur_char(pctx) == '\r' &&
+ pctx_char(pctx, pctx_pos(pctx) + 1) == '\n' &&
+ !pctx_char(pctx, pctx_pos(pctx) + 2))) {
+ uci_getln(ctx, pctx->pos);
+ 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)
+{
+ struct uci_parse_context *pctx = ctx->pctx;
+
+ while (pctx_cur_char(pctx) && isspace(pctx_cur_char(pctx)))
+ pctx->pos += 1;
+}
+
+static inline void addc(struct uci_context *ctx, int *pos_dest, int *pos_src)
+{
+ struct uci_parse_context *pctx = ctx->pctx;
+
+ pctx_char(pctx, *pos_dest) = pctx_char(pctx, *pos_src);
+ *pos_dest += 1;
+ *pos_src += 1;
+}
+
+/*
+ * parse a double quoted string argument from the command line
+ */
+static void parse_double_quote(struct uci_context *ctx, int *target)
+{
+ struct uci_parse_context *pctx = ctx->pctx;
+ char c;
+
+ /* skip quote character */
+ pctx->pos += 1;
+
+ while (1) {
+ c = pctx_cur_char(pctx);
+ switch(c) {
+ case '"':
+ pctx->pos += 1;
+ return;
+ case 0:
+ /* Multi-line str value */
+ uci_getln(ctx, pctx->pos);
+ if (!pctx_cur_char(pctx)) {
+ uci_parse_error(ctx, "EOF with unterminated \"");
+ }
+ break;
+ case '\\':
+ if (!parse_backslash(ctx))
+ continue;
+ /* fall through */
+ default:
+ addc(ctx, target, &pctx->pos);
+ break;
+ }
+ }
+}
+
+/*
+ * parse a single quoted string argument from the command line
+ */
+static void parse_single_quote(struct uci_context *ctx, int *target)
+{
+ struct uci_parse_context *pctx = ctx->pctx;
+ char c;
+ /* skip quote character */
+ pctx->pos += 1;
+
+ while (1) {
+ c = pctx_cur_char(pctx);
+ switch(c) {
+ case '\'':
+ pctx->pos += 1;
+ return;
+ case 0:
+ /* Multi-line str value */
+ uci_getln(ctx, pctx->pos);
+ if (!pctx_cur_char(pctx))
+ uci_parse_error(ctx, "EOF with unterminated '");
+
+ break;
+ default:
+ addc(ctx, target, &pctx->pos);
+ }
+ }
+}
+
+/*
+ * parse a string from the command line and detect the quoting style
+ */
+static void parse_str(struct uci_context *ctx, int *target)
+{
+ struct uci_parse_context *pctx = ctx->pctx;
+ bool next = true;
+ do {
+ switch(pctx_cur_char(pctx)) {
+ case '\'':
+ parse_single_quote(ctx, target);
+ break;
+ case '"':
+ parse_double_quote(ctx, target);
+ break;
+ case '#':
+ pctx_cur_char(pctx) = 0;
+ /* fall through */
+ case 0:
+ goto done;
+ case ';':
+ next = false;
+ goto done;
+ case '\\':
+ if (!parse_backslash(ctx))
+ continue;
+ /* fall through */
+ default:
+ addc(ctx, target, &pctx->pos);
+ break;
+ }
+ } while (pctx_cur_char(pctx) && !isspace(pctx_cur_char(pctx)));
+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 (pctx_cur_char(pctx) && next)
+ pctx->pos += 1;
+
+ /* terminate the parsed string */
+ pctx_char(pctx, *target) = 0;
+}
+
+/*
+ * extract the next argument from the command line
+ */
+static int next_arg(struct uci_context *ctx, bool required, bool name, bool package)
+{
+ struct uci_parse_context *pctx = ctx->pctx;
+ int val, ptr;
+
+ skip_whitespace(ctx);
+ val = ptr = pctx_pos(pctx);
+ if (pctx_cur_char(pctx) == ';') {
+ pctx_cur_char(pctx) = 0;
+ pctx->pos += 1;
+ } else {
+ parse_str(ctx, &ptr);
+ }
+ if (!pctx_char(pctx, val)) {
+ if (required)
+ uci_parse_error(ctx, "insufficient arguments");
+ goto done;
+ }
+
+ if (name && !uci_validate_str(pctx_str(pctx, val), name, package))
+ uci_parse_error(ctx, "invalid character in name field");
+
+done:
+ return val;
+}
+
+int uci_parse_argument(struct uci_context *ctx, FILE *stream, char **str, char **result)
+{
+ int ofs_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) {
+ ctx->pctx->pos = 0;
+ uci_getln(ctx, 0);
+ }
+
+ ofs_result = next_arg(ctx, false, false, false);
+ *result = pctx_str(ctx->pctx, ofs_result);
+ *str = pctx_cur_str(ctx->pctx);
+
+ return 0;
+}
+
+static int
+uci_fill_ptr(struct uci_context *ctx, struct uci_ptr *ptr, struct uci_element *e)
+{
+ UCI_ASSERT(ctx, ptr != NULL);
+ UCI_ASSERT(ctx, e != NULL);
+
+ memset(ptr, 0, sizeof(struct uci_ptr));
+ switch(e->type) {
+ case UCI_TYPE_OPTION:
+ ptr->o = uci_to_option(e);
+ goto fill_option;
+ case UCI_TYPE_SECTION:
+ ptr->s = uci_to_section(e);
+ goto fill_section;
+ case UCI_TYPE_PACKAGE:
+ ptr->p = uci_to_package(e);
+ goto fill_package;
+ default:
+ UCI_THROW(ctx, UCI_ERR_INVAL);
+ }
+
+fill_option:
+ ptr->option = ptr->o->e.name;
+ ptr->s = ptr->o->section;
+fill_section:
+ ptr->section = ptr->s->e.name;
+ ptr->p = ptr->s->package;
+fill_package:
+ ptr->package = ptr->p->e.name;
+
+ ptr->flags |= UCI_LOOKUP_DONE;
+
+ return 0;
+}
+
-static struct uci_backend uci_file_backend;
/*
* verify that the end of the line or command is reached.
* throw an error if extra arguments are given on the command line
*/
-static void assert_eol(struct uci_context *ctx, char **str)
+static void assert_eol(struct uci_context *ctx)
{
char *tmp;
+ int ofs_tmp;
- skip_whitespace(ctx, str);
- tmp = next_arg(ctx, str, false, false);
+ skip_whitespace(ctx);
+ ofs_tmp = next_arg(ctx, false, false, false);
+ tmp = pctx_str(ctx->pctx, ofs_tmp);
if (*tmp && (ctx->flags & UCI_FLAG_STRICT))
- uci_parse_error(ctx, *str, "too many arguments");
+ uci_parse_error(ctx, "too many arguments");
}
-/*
+/*
* switch to a different config, either triggered by uci_load, or by a
* 'package <...>' statement in the import file
*/
if (!name)
return;
- /*
+ /*
* if an older config under the same name exists, unload it
* ignore errors here, e.g. if the config was not found
*/
/*
* parse the 'package' uci command (next config package)
*/
-static void uci_parse_package(struct uci_context *ctx, char **str, bool single)
+static void uci_parse_package(struct uci_context *ctx, bool single)
{
- char *name = NULL;
+ struct uci_parse_context *pctx = ctx->pctx;
+ int ofs_name;
+ char *name;
/* command string null-terminated by strtok */
- *str += strlen(*str) + 1;
+ pctx->pos += strlen(pctx_cur_str(pctx)) + 1;
- name = next_arg(ctx, str, true, true);
- assert_eol(ctx, str);
+ ofs_name = next_arg(ctx, true, true, true);
+ name = pctx_str(pctx, ofs_name);
+ assert_eol(ctx);
if (single)
return;
/*
* parse the 'config' uci command (open a section)
*/
-static void uci_parse_config(struct uci_context *ctx, char **str)
+static void uci_parse_config(struct uci_context *ctx)
{
struct uci_parse_context *pctx = ctx->pctx;
struct uci_element *e;
struct uci_ptr ptr;
- char *name = NULL;
- char *type = NULL;
+ int ofs_name, ofs_type;
+ char *name;
+ char *type;
uci_fixup_section(ctx, ctx->pctx->section);
if (!ctx->pctx->package) {
if (!ctx->pctx->name)
- uci_parse_error(ctx, *str, "attempting to import a file without a package name");
+ uci_parse_error(ctx, "attempting to import a file without a package name");
uci_switch_config(ctx);
}
/* command string null-terminated by strtok */
- *str += strlen(*str) + 1;
+ pctx->pos += strlen(pctx_cur_str(pctx)) + 1;
- type = next_arg(ctx, str, true, false);
+ ofs_type = next_arg(ctx, true, false, false);
+ type = pctx_str(pctx, ofs_type);
if (!uci_validate_type(type))
- uci_parse_error(ctx, type, "invalid character in field");
- name = next_arg(ctx, str, false, true);
- assert_eol(ctx, str);
+ uci_parse_error(ctx, "invalid character in type field");
- if (!name) {
+ ofs_name = next_arg(ctx, false, true, false);
+ type = pctx_str(pctx, ofs_type);
+ name = pctx_str(pctx, ofs_name);
+ assert_eol(ctx);
+
+ if (!name || !name[0]) {
ctx->internal = !pctx->merge;
UCI_NESTED(uci_add_section, ctx, pctx->package, type, &pctx->section);
} else {
- UCI_NESTED(uci_fill_ptr, ctx, &ptr, &pctx->package->e, false);
+ uci_fill_ptr(ctx, &ptr, &pctx->package->e);
e = uci_lookup_list(&pctx->package->sections, name);
if (e)
ptr.s = uci_to_section(e);
/*
* parse the 'option' uci command (open a value)
*/
-static void uci_parse_option(struct uci_context *ctx, char **str, bool list)
+static void uci_parse_option(struct uci_context *ctx, bool list)
{
struct uci_parse_context *pctx = ctx->pctx;
struct uci_element *e;
struct uci_ptr ptr;
+ int ofs_name, ofs_value;
char *name = NULL;
char *value = NULL;
if (!pctx->section)
- uci_parse_error(ctx, *str, "option/list command found before the first section");
+ uci_parse_error(ctx, "option/list command found before the first section");
/* command string null-terminated by strtok */
- *str += strlen(*str) + 1;
+ pctx->pos += strlen(pctx_cur_str(pctx)) + 1;
- name = next_arg(ctx, str, true, true);
- value = next_arg(ctx, str, false, false);
- assert_eol(ctx, str);
+ ofs_name = next_arg(ctx, true, true, false);
+ ofs_value = next_arg(ctx, false, false, false);
+ name = pctx_str(pctx, ofs_name);
+ value = pctx_str(pctx, ofs_value);
+ assert_eol(ctx);
- UCI_NESTED(uci_fill_ptr, ctx, &ptr, &pctx->section->e, false);
+ uci_fill_ptr(ctx, &ptr, &pctx->section->e);
e = uci_lookup_list(&pctx->section->options, name);
if (e)
ptr.o = uci_to_option(e);
static void uci_parse_line(struct uci_context *ctx, bool single)
{
struct uci_parse_context *pctx = ctx->pctx;
- char *word, *brk;
+ char *word;
- word = pctx->buf;
+ /* Skip whitespace characters at the start of line */
+ skip_whitespace(ctx);
do {
- brk = NULL;
- word = strtok_r(word, " \t", &brk);
+ word = strtok(pctx_cur_str(pctx), " \t");
if (!word)
return;
return;
case 'p':
if ((word[1] == 0) || !strcmp(word + 1, "ackage"))
- uci_parse_package(ctx, &word, single);
+ uci_parse_package(ctx, single);
else
goto invalid;
break;
case 'c':
if ((word[1] == 0) || !strcmp(word + 1, "onfig"))
- uci_parse_config(ctx, &word);
+ uci_parse_config(ctx);
else
goto invalid;
break;
case 'o':
if ((word[1] == 0) || !strcmp(word + 1, "ption"))
- uci_parse_option(ctx, &word, false);
+ uci_parse_option(ctx, false);
else
goto invalid;
break;
case 'l':
if ((word[1] == 0) || !strcmp(word + 1, "ist"))
- uci_parse_option(ctx, &word, true);
+ uci_parse_option(ctx, true);
else
goto invalid;
break;
}
continue;
invalid:
- uci_parse_error(ctx, word, "invalid command");
+ uci_parse_error(ctx, "invalid command");
} while (1);
}
/*
* escape an uci string for export
*/
-static char *uci_escape(struct uci_context *ctx, const char *str)
+static const char *uci_escape(struct uci_context *ctx, const char *str)
{
const char *end;
int ofs = 0;
if (!ctx->buf) {
ctx->bufsz = LINEBUF;
ctx->buf = malloc(LINEBUF);
+
+ if (!ctx->buf)
+ return str;
}
while (1) {
struct uci_element *s, *o, *i;
if (header)
- fprintf(stream, "package '%s'\n", uci_escape(ctx, p->e.name));
+ fprintf(stream, "package %s\n", uci_escape(ctx, p->e.name));
uci_foreach_element(&p->sections, s) {
struct uci_section *sec = uci_to_section(s);
- fprintf(stream, "\nconfig '%s'", uci_escape(ctx, sec->type));
+ fprintf(stream, "\nconfig %s", uci_escape(ctx, sec->type));
if (!sec->anonymous || (ctx->flags & UCI_FLAG_EXPORT_NAME))
fprintf(stream, " '%s'", uci_escape(ctx, sec->e.name));
fprintf(stream, "\n");
struct uci_option *opt = uci_to_option(o);
switch(opt->type) {
case UCI_TYPE_STRING:
- fprintf(stream, "\toption '%s'", uci_escape(ctx, opt->e.name));
+ fprintf(stream, "\toption %s", uci_escape(ctx, opt->e.name));
fprintf(stream, " '%s'\n", uci_escape(ctx, opt->v.string));
break;
case UCI_TYPE_LIST:
uci_foreach_element(&opt->v.list, i) {
- fprintf(stream, "\tlist '%s'", uci_escape(ctx, opt->e.name));
+ fprintf(stream, "\tlist %s", uci_escape(ctx, opt->e.name));
fprintf(stream, " '%s'\n", uci_escape(ctx, i->name));
}
break;
uci_alloc_parse_context(ctx);
pctx = ctx->pctx;
pctx->file = stream;
- if (*package && single) {
+ if (package && *package && single) {
pctx->package = *package;
pctx->merge = true;
}
}
while (!feof(pctx->file)) {
+ pctx->pos = 0;
uci_getln(ctx, 0);
UCI_TRAP_SAVE(ctx, error);
if (pctx->buf[0])
return filename;
}
-void uci_file_commit(struct uci_context *ctx, struct uci_package **package, bool overwrite)
+static void uci_file_commit(struct uci_context *ctx, struct uci_package **package, bool overwrite)
{
struct uci_package *p = *package;
- FILE *f = NULL;
+ FILE *f1, *f2 = NULL;
char *name = NULL;
char *path = NULL;
+ char *filename = NULL;
+ struct stat statbuf;
+ bool do_rename = false;
if (!p->path) {
if (overwrite)
UCI_THROW(ctx, UCI_ERR_INVAL);
}
+ if ((asprintf(&filename, "%s/.%s.uci-XXXXXX", ctx->confdir, p->e.name) < 0) || !filename)
+ UCI_THROW(ctx, UCI_ERR_MEM);
+
+ if (!mktemp(filename))
+ *filename = 0;
+
+ if (!*filename) {
+ free(filename);
+ UCI_THROW(ctx, UCI_ERR_IO);
+ }
+
+ if ((stat(filename, &statbuf) == 0) && ((statbuf.st_mode & S_IFMT) != S_IFREG))
+ UCI_THROW(ctx, UCI_ERR_IO);
+
/* open the config file for writing now, so that it is locked */
- f = uci_open_stream(ctx, p->path, SEEK_SET, true, true);
+ f1 = uci_open_stream(ctx, p->path, NULL, SEEK_SET, true, true);
- /* flush unsaved changes and reload from history file */
+ /* flush unsaved changes and reload from delta file */
UCI_TRAP_SAVE(ctx, done);
- if (p->has_history) {
+ if (p->has_delta) {
if (!overwrite) {
name = uci_strdup(ctx, p->e.name);
path = uci_strdup(ctx, p->path);
- /* dump our own changes to the history file */
- if (!uci_list_empty(&p->history))
+ /* dump our own changes to the delta file */
+ if (!uci_list_empty(&p->delta))
UCI_INTERNAL(uci_save, ctx, p);
- /*
- * other processes might have modified the config
- * as well. dump and reload
+ /*
+ * other processes might have modified the config
+ * as well. dump and reload
*/
uci_free_package(&p);
uci_cleanup(ctx);
- UCI_INTERNAL(uci_import, ctx, f, name, &p, true);
+ UCI_INTERNAL(uci_import, ctx, f1, name, &p, true);
p->path = path;
- p->has_history = true;
+ p->has_delta = true;
*package = p;
/* freed together with the uci_package */
path = NULL;
-
- /* check for updated history, flush */
- if (!uci_load_history(ctx, p, true))
- goto done;
- } else {
- /* flush history */
- if (!uci_load_history(ctx, NULL, true))
- goto done;
}
+
+ /* flush delta */
+ if (!uci_load_delta(ctx, p, true))
+ goto done;
}
- rewind(f);
- ftruncate(fileno(f), 0);
+ f2 = uci_open_stream(ctx, filename, p->path, SEEK_SET, true, true);
+ uci_export(ctx, f2, p, false);
+
+ fflush(f2);
+ fsync(fileno(f2));
+ uci_close_stream(f2);
+
+ do_rename = true;
- uci_export(ctx, f, p, false);
UCI_TRAP_RESTORE(ctx);
done:
- if (name)
- free(name);
- if (path)
- free(path);
- uci_close_stream(f);
+ free(name);
+ free(path);
+ uci_close_stream(f1);
+ if (do_rename && rename(filename, p->path)) {
+ unlink(filename);
+ UCI_THROW(ctx, UCI_ERR_IO);
+ }
+ free(filename);
+ sync();
if (ctx->err)
UCI_THROW(ctx, ctx->err);
}
-/*
+/*
* This function returns the filename by returning the string
* after the last '/' character. By checking for a non-'\0'
* character afterwards, directories are ignored (glob marks
dir = uci_malloc(ctx, strlen(ctx->confdir) + 1 + sizeof("/*"));
sprintf(dir, "%s/*", ctx->confdir);
- if (glob(dir, GLOB_MARK, NULL, &globbuf) != 0)
+ if (glob(dir, GLOB_MARK, NULL, &globbuf) != 0) {
+ free(dir);
UCI_THROW(ctx, UCI_ERR_NOTFOUND);
+ }
size = sizeof(char *) * (globbuf.gl_pathc + 1);
for(i = 0; i < globbuf.gl_pathc; i++) {
buf += strlen(buf) + 1;
}
free(dir);
+ globfree(&globbuf);
return configs;
}
break;
}
- file = uci_open_stream(ctx, filename, SEEK_SET, false, false);
- ctx->err = 0;
UCI_TRAP_SAVE(ctx, done);
+ file = uci_open_stream(ctx, filename, NULL, SEEK_SET, false, false);
+ ctx->err = 0;
UCI_INTERNAL(uci_import, ctx, file, name, &package, true);
UCI_TRAP_RESTORE(ctx);
if (package) {
package->path = filename;
- package->has_history = confdir;
- uci_load_history(ctx, package, false);
+ package->has_delta = confdir;
+ uci_load_delta(ctx, package, false);
}
done:
uci_close_stream(file);
- if (ctx->err)
+ if (ctx->err) {
+ free(filename);
UCI_THROW(ctx, ctx->err);
+ }
return package;
}
-static UCI_BACKEND(uci_file_backend, "file",
+__private UCI_BACKEND(uci_file_backend, "file",
.load = uci_file_load,
.commit = uci_file_commit,
.list_configs = uci_list_config_files,
projects / project / uci.git / blobdiff