#include <sys/types.h>
#include <sys/stat.h>
#include <stdbool.h>
+#include <unistd.h>
+#include <fcntl.h>
#include <stdio.h>
#include <ctype.h>
-#define LINEBUF 128
+#define LINEBUF 32
#define LINEBUF_MAX 4096
+static void uci_parse_error(struct uci_context *ctx, char *pos, char *reason)
+{
+ struct uci_parse_context *pctx = ctx->pctx;
+
+ pctx->reason = reason;
+ pctx->byte = pos - pctx->buf;
+ UCI_THROW(ctx, UCI_ERR_PARSE);
+}
+
/*
* Fetch a new line from the input stream and resize buffer if necessary
*/
p[ofs] = 0;
p = fgets(p, pctx->bufsz - ofs, pctx->file);
- if (!p || !p[ofs])
+ if (!p || !*p)
return;
ofs += strlen(p);
return;
}
- if (pctx->bufsz > LINEBUF_MAX/2) {
- pctx->reason = "line too long";
- pctx->byte = LINEBUF_MAX;
- UCI_THROW(ctx, UCI_ERR_PARSE);
- }
+ 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);
}
/*
- * Clean up all extra memory used by the parser
+ * Clean up all extra memory used by the parser and exporter
*/
-static void uci_parse_cleanup(struct uci_context *ctx)
+static void uci_file_cleanup(struct uci_context *ctx)
{
struct uci_parse_context *pctx;
+ if (ctx->buf) {
+ free(ctx->buf);
+ ctx->buf = NULL;
+ ctx->bufsz = 0;
+ }
+
pctx = ctx->pctx;
if (!pctx)
return;
ctx->pctx = NULL;
- if (pctx->cfg) {
- uci_list_del(&pctx->cfg->list);
- uci_drop_config(pctx->cfg);
- }
+ if (pctx->package)
+ uci_free_package(&pctx->package);
+
if (pctx->buf)
free(pctx->buf);
- if (pctx->file)
- fclose(pctx->file);
free(pctx);
}
break;
}
}
- ctx->pctx->reason = "unterminated \"";
- ctx->pctx->byte = *str - ctx->pctx->buf;
- UCI_THROW(ctx, UCI_ERR_PARSE);
+ uci_parse_error(ctx, *str, "unterminated \"");
}
/*
addc(target, str);
}
}
- ctx->pctx->reason = "unterminated '";
- ctx->pctx->byte = *str - ctx->pctx->buf;
- UCI_THROW(ctx, UCI_ERR_PARSE);
+ uci_parse_error(ctx, *str, "unterminated '");
}
/*
/*
* extract the next argument from the command line
*/
-static char *next_arg(struct uci_context *ctx, char **str, bool required)
+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);
parse_str(ctx, str, &ptr);
- if (required && !*val) {
- ctx->pctx->reason = "insufficient arguments";
- ctx->pctx->byte = *str - ctx->pctx->buf;
- UCI_THROW(ctx, UCI_ERR_PARSE);
- }
+ if (required && !*val)
+ uci_parse_error(ctx, *str, "insufficient arguments");
+ if (name && !uci_validate_name(val))
+ uci_parse_error(ctx, val, "invalid character in field");
- return uci_strdup(ctx, val);
+ return val;
}
/*
{
char *tmp;
- tmp = next_arg(ctx, str, false);
- if (tmp && *tmp) {
- ctx->pctx->reason = "too many arguments";
- ctx->pctx->byte = tmp - ctx->pctx->buf;
- UCI_THROW(ctx, UCI_ERR_PARSE);
- }
+ tmp = next_arg(ctx, str, false, false);
+ if (tmp && *tmp)
+ uci_parse_error(ctx, *str, "too many arguments");
}
/*
static void uci_switch_config(struct uci_context *ctx)
{
struct uci_parse_context *pctx;
+ struct uci_element *e;
const char *name;
pctx = ctx->pctx;
name = pctx->name;
/* add the last config to main config file list */
- if (pctx->cfg) {
- uci_list_add(&ctx->root, &pctx->cfg->list);
+ if (pctx->package) {
+ uci_list_add(&ctx->root, &pctx->package->e.list);
- pctx->cfg = NULL;
+ pctx->package = NULL;
pctx->section = NULL;
}
* if an older config under the same name exists, unload it
* ignore errors here, e.g. if the config was not found
*/
- UCI_TRAP_SAVE(ctx, ignore);
- uci_unload(ctx, name);
- UCI_TRAP_RESTORE(ctx);
-ignore:
- ctx->errno = 0;
-
- pctx->cfg = uci_alloc_config(ctx, name);
+ e = uci_lookup_list(ctx, &ctx->root, name);
+ if (e)
+ UCI_THROW(ctx, UCI_ERR_DUPLICATE);
+ pctx->package = uci_alloc_package(ctx, name);
}
/*
* parse the 'package' uci command (next config package)
*/
-static void uci_parse_package(struct uci_context *ctx, char **str)
+static void uci_parse_package(struct uci_context *ctx, char **str, bool single)
{
char *name = NULL;
/* command string null-terminated by strtok */
*str += strlen(*str) + 1;
- UCI_TRAP_SAVE(ctx, error);
- name = next_arg(ctx, str, true);
+ name = next_arg(ctx, str, true, true);
assert_eol(ctx, str);
+ if (single)
+ return;
+
ctx->pctx->name = name;
uci_switch_config(ctx);
- UCI_TRAP_RESTORE(ctx);
- return;
-
-error:
- if (name)
- free(name);
- UCI_THROW(ctx, ctx->errno);
}
/*
char *name = NULL;
char *type = NULL;
- if (!ctx->pctx->cfg) {
- if (!ctx->pctx->name) {
- ctx->pctx->byte = *str - ctx->pctx->buf;
- ctx->pctx->reason = "attempting to import a file without a package name";
- UCI_THROW(ctx, UCI_ERR_PARSE);
- }
+ if (!ctx->pctx->package) {
+ if (!ctx->pctx->name)
+ uci_parse_error(ctx, *str, "attempting to import a file without a package name");
+
uci_switch_config(ctx);
}
/* command string null-terminated by strtok */
*str += strlen(*str) + 1;
- UCI_TRAP_SAVE(ctx, error);
- type = next_arg(ctx, str, true);
- name = next_arg(ctx, str, false);
+ type = next_arg(ctx, str, true, true);
+ name = next_arg(ctx, str, false, true);
assert_eol(ctx, str);
- ctx->pctx->section = uci_add_section(ctx->pctx->cfg, type, name);
- UCI_TRAP_RESTORE(ctx);
- return;
-
-error:
- if (name)
- free(name);
- if (type)
- free(type);
- UCI_THROW(ctx, ctx->errno);
+ ctx->pctx->section = uci_alloc_section(ctx->pctx->package, type, name);
}
/*
char *name = NULL;
char *value = NULL;
- if (!ctx->pctx->section) {
- ctx->pctx->byte = *str - ctx->pctx->buf;
- ctx->pctx->reason = "option command found before the first section";
- UCI_THROW(ctx, UCI_ERR_PARSE);
- }
+ if (!ctx->pctx->section)
+ uci_parse_error(ctx, *str, "option command found before the first section");
+
/* command string null-terminated by strtok */
*str += strlen(*str) + 1;
- UCI_TRAP_SAVE(ctx, error);
- name = next_arg(ctx, str, true);
- value = next_arg(ctx, str, true);
+ name = next_arg(ctx, str, true, true);
+ value = next_arg(ctx, str, true, false);
assert_eol(ctx, str);
- uci_add_option(ctx->pctx->section, name, value);
- UCI_TRAP_RESTORE(ctx);
- return;
-
-error:
- if (name)
- free(name);
- if (value)
- free(value);
- UCI_THROW(ctx, ctx->errno);
+ uci_alloc_option(ctx->pctx->section, name, value);
}
/*
* parse a complete input line, split up combined commands by ';'
*/
-static void uci_parse_line(struct uci_context *ctx)
+static void uci_parse_line(struct uci_context *ctx, bool single)
{
struct uci_parse_context *pctx = ctx->pctx;
- char *word, *brk;
+ char *word, *brk = NULL;
for (word = strtok_r(pctx->buf, ";", &brk);
word;
word = strtok_r(NULL, ";", &brk)) {
- char *pbrk;
+ char *pbrk = NULL;
word = strtok_r(word, " \t", &pbrk);
switch(word[0]) {
case 'p':
if ((word[1] == 0) || !strcmp(word + 1, "ackage"))
- uci_parse_package(ctx, &word);
+ uci_parse_package(ctx, &word, single);
break;
case 'c':
if ((word[1] == 0) || !strcmp(word + 1, "onfig"))
uci_parse_option(ctx, &word);
break;
default:
- pctx->reason = "unterminated command";
- pctx->byte = word - pctx->buf;
- UCI_THROW(ctx, UCI_ERR_PARSE);
+ uci_parse_error(ctx, word, "unterminated command");
break;
}
}
}
-int uci_import(struct uci_context *ctx, FILE *stream, const char *name, struct uci_config **cfg)
+/* max number of characters that escaping adds to the string */
+#define UCI_QUOTE_ESCAPE "'\\''"
+
+/*
+ * escape an uci string for export
+ */
+static char *uci_escape(struct uci_context *ctx, char *str)
+{
+ char *s, *p;
+ int pos = 0;
+
+ if (!ctx->buf) {
+ ctx->bufsz = LINEBUF;
+ ctx->buf = malloc(LINEBUF);
+ }
+
+ s = str;
+ p = strchr(str, '\'');
+ if (!p)
+ return str;
+
+ do {
+ int len = p - s;
+ if (len > 0) {
+ if (p + sizeof(UCI_QUOTE_ESCAPE) - str >= ctx->bufsz) {
+ ctx->bufsz *= 2;
+ ctx->buf = realloc(ctx->buf, ctx->bufsz);
+ if (!ctx->buf)
+ UCI_THROW(ctx, UCI_ERR_MEM);
+ }
+ memcpy(&ctx->buf[pos], s, len);
+ pos += len;
+ }
+ strcpy(&ctx->buf[pos], UCI_QUOTE_ESCAPE);
+ pos += sizeof(UCI_QUOTE_ESCAPE);
+ s = p + 1;
+ } while ((p = strchr(s, '\'')));
+
+ return ctx->buf;
+}
+
+
+/*
+ * export a single config package to a file stream
+ */
+static void uci_export_package(struct uci_package *p, FILE *stream, bool header)
+{
+ struct uci_context *ctx = p->ctx;
+ struct uci_element *s, *o;
+
+ if (header)
+ 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, " '%s'\n", uci_escape(ctx, sec->e.name));
+ uci_foreach_element(&sec->options, o) {
+ struct uci_option *opt = uci_to_option(o);
+ fprintf(stream, "\toption '%s'", uci_escape(ctx, opt->e.name));
+ fprintf(stream, " '%s'\n", uci_escape(ctx, opt->value));
+ }
+ }
+ fprintf(stream, "\n");
+}
+
+int uci_export(struct uci_context *ctx, FILE *stream, struct uci_package *package, bool header)
+{
+ struct uci_element *e;
+
+ UCI_HANDLE_ERR(ctx);
+ UCI_ASSERT(ctx, stream != NULL);
+
+ if (package)
+ uci_export_package(package, stream, header);
+ else {
+ uci_foreach_element(&ctx->root, e) {
+ uci_export_package(uci_to_package(e), stream, header);
+ }
+ }
+
+ return 0;
+}
+
+int uci_import(struct uci_context *ctx, FILE *stream, const char *name, struct uci_package **package, bool single)
{
struct uci_parse_context *pctx;
/* make sure no memory from previous parse attempts is leaked */
- uci_parse_cleanup(ctx);
+ uci_file_cleanup(ctx);
pctx = (struct uci_parse_context *) uci_malloc(ctx, sizeof(struct uci_parse_context));
ctx->pctx = pctx;
while (!feof(pctx->file)) {
uci_getln(ctx, 0);
+ UCI_TRAP_SAVE(ctx, error);
if (pctx->buf[0])
- uci_parse_line(ctx);
+ uci_parse_line(ctx, single);
+ UCI_TRAP_RESTORE(ctx);
+ continue;
+error:
+ if (ctx->flags & UCI_FLAG_PERROR)
+ uci_perror(ctx, NULL);
+ if ((ctx->errno != UCI_ERR_PARSE) ||
+ (ctx->flags & UCI_FLAG_STRICT))
+ UCI_THROW(ctx, ctx->errno);
}
- if (cfg)
- *cfg = pctx->cfg;
+ if (package)
+ *package = pctx->package;
pctx->name = NULL;
uci_switch_config(ctx);
/* no error happened, we can get rid of the parser context now */
- uci_parse_cleanup(ctx);
+ uci_file_cleanup(ctx);
return 0;
}
-int uci_load(struct uci_context *ctx, const char *name, struct uci_config **cfg)
+/*
+ * 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)
{
struct stat statbuf;
+ FILE *file = NULL;
+ int fd, ret;
+ int mode = (write ? O_RDWR : O_RDONLY);
+
+ if (create)
+ mode |= O_CREAT;
+
+ if (!write && ((stat(filename, &statbuf) < 0) ||
+ ((statbuf.st_mode & S_IFMT) != S_IFREG))) {
+ UCI_THROW(ctx, UCI_ERR_NOTFOUND);
+ }
+
+ fd = open(filename, mode, UCI_FILEMODE);
+ if (fd <= 0)
+ goto error;
+
+ if (flock(fd, (write ? LOCK_EX : LOCK_SH)) < 0)
+ goto error;
+
+ ret = lseek(fd, 0, pos);
+
+ if (ret < 0)
+ goto error;
+
+ file = fdopen(fd, (write ? "w+" : "r"));
+ if (file)
+ goto done;
+
+error:
+ UCI_THROW(ctx, UCI_ERR_IO);
+done:
+ return file;
+}
+
+static void uci_close_stream(FILE *stream)
+{
+ int fd;
+
+ if (!stream)
+ return;
+
+ fd = fileno(stream);
+ flock(fd, LOCK_UN);
+ fclose(stream);
+}
+
+static void uci_parse_history_line(struct uci_context *ctx, struct uci_package *p, char *buf)
+{
+ bool delete = false;
+ char *package = NULL;
+ char *section = NULL;
+ char *option = NULL;
+ char *value = NULL;
+
+ if (buf[0] == '-') {
+ delete = true;
+ buf++;
+ }
+
+ UCI_INTERNAL(uci_parse_tuple, ctx, buf, &package, §ion, &option, &value);
+ if (!package || !section || (!delete && !value))
+ goto error;
+ if (strcmp(package, p->e.name) != 0)
+ goto error;
+ if (!uci_validate_name(section))
+ goto error;
+ if (option && !uci_validate_name(option))
+ goto error;
+
+ if (delete)
+ UCI_INTERNAL(uci_del, ctx, p, section, option);
+ else
+ UCI_INTERNAL(uci_set, ctx, p, section, option, value);
+
+ return;
+error:
+ UCI_THROW(ctx, UCI_ERR_PARSE);
+}
+
+static void uci_parse_history(struct uci_context *ctx, FILE *stream, struct uci_package *p)
+{
+ struct uci_parse_context *pctx;
+
+ /* make sure no memory from previous parse attempts is leaked */
+ uci_file_cleanup(ctx);
+
+ pctx = (struct uci_parse_context *) uci_malloc(ctx, sizeof(struct uci_parse_context));
+ ctx->pctx = pctx;
+ pctx->file = stream;
+
+ while (!feof(pctx->file)) {
+ uci_getln(ctx, 0);
+ if (!pctx->buf[0])
+ continue;
+
+ /*
+ * ignore parse errors in single lines, we want to preserve as much
+ * history as possible
+ */
+ UCI_TRAP_SAVE(ctx, error);
+ uci_parse_history_line(ctx, p, pctx->buf);
+ UCI_TRAP_RESTORE(ctx);
+error:
+ continue;
+ }
+
+ /* no error happened, we can get rid of the parser context now */
+ uci_file_cleanup(ctx);
+}
+
+static void uci_load_history(struct uci_context *ctx, struct uci_package *p, bool flush)
+{
+ char *filename = NULL;
+ FILE *f = NULL;
+
+ if (!p->confdir)
+ return;
+ if ((asprintf(&filename, "%s/%s", UCI_SAVEDIR, p->e.name) < 0) || !filename)
+ UCI_THROW(ctx, UCI_ERR_MEM);
+
+ UCI_TRAP_SAVE(ctx, done);
+ f = uci_open_stream(ctx, filename, SEEK_SET, flush, false);
+ uci_parse_history(ctx, f, p);
+ UCI_TRAP_RESTORE(ctx);
+
+done:
+ if (flush && f) {
+ rewind(f);
+ ftruncate(fileno(f), 0);
+ }
+ if (filename)
+ free(filename);
+ uci_close_stream(f);
+ ctx->errno = 0;
+}
+
+
+int uci_load(struct uci_context *ctx, const char *name, struct uci_package **package)
+{
char *filename;
- bool confpath;
- FILE *file;
+ bool confdir;
+ FILE *file = NULL;
UCI_HANDLE_ERR(ctx);
UCI_ASSERT(ctx, name != NULL);
-ignore:
- ctx->errno = 0;
-
switch (name[0]) {
case '.':
+ /* relative path outside of /etc/config */
+ if (name[1] != '/')
+ UCI_THROW(ctx, UCI_ERR_NOTFOUND);
+ /* fall through */
case '/':
- /* absolute/relative path outside of /etc/config */
- filename = (char *) name;
- confpath = false;
+ /* absolute path outside of /etc/config */
+ filename = uci_strdup(ctx, name);
+ name = strrchr(name, '/') + 1;
+ confdir = false;
break;
default:
+ /* config in /etc/config */
+ if (strchr(name, '/'))
+ UCI_THROW(ctx, UCI_ERR_INVAL);
filename = uci_malloc(ctx, strlen(name) + sizeof(UCI_CONFDIR) + 2);
sprintf(filename, UCI_CONFDIR "/%s", name);
- confpath = true;
+ confdir = true;
break;
}
- if ((stat(filename, &statbuf) < 0) ||
- ((statbuf.st_mode & S_IFMT) != S_IFREG)) {
- UCI_THROW(ctx, UCI_ERR_NOTFOUND);
+ file = uci_open_stream(ctx, filename, SEEK_SET, false, false);
+ ctx->errno = 0;
+ UCI_TRAP_SAVE(ctx, done);
+ uci_import(ctx, file, name, package, true);
+ UCI_TRAP_RESTORE(ctx);
+
+ if (*package) {
+ (*package)->path = filename;
+ (*package)->confdir = confdir;
+ uci_load_history(ctx, *package, false);
}
- file = fopen(filename, "r");
- if (filename != name)
+done:
+ uci_close_stream(file);
+ return ctx->errno;
+}
+
+int uci_save(struct uci_context *ctx, struct uci_package *p)
+{
+ FILE *f = NULL;
+ char *filename = NULL;
+ struct uci_element *e, *tmp;
+
+ UCI_HANDLE_ERR(ctx);
+ UCI_ASSERT(ctx, p != NULL);
+
+ /*
+ * if the config file was outside of the /etc/config path,
+ * don't save the history to a file, update the real file
+ * directly.
+ * does not modify the uci_package pointer
+ */
+ if (!p->confdir)
+ return uci_commit(ctx, &p);
+
+ if (uci_list_empty(&p->history))
+ return 0;
+
+ if ((asprintf(&filename, "%s/%s", UCI_SAVEDIR, p->e.name) < 0) || !filename)
+ UCI_THROW(ctx, UCI_ERR_MEM);
+
+ ctx->errno = 0;
+ UCI_TRAP_SAVE(ctx, done);
+ f = uci_open_stream(ctx, filename, SEEK_END, true, true);
+ UCI_TRAP_RESTORE(ctx);
+
+ uci_foreach_element_safe(&p->history, tmp, e) {
+ struct uci_history *h = uci_to_history(e);
+
+ if (h->cmd == UCI_CMD_REMOVE)
+ fprintf(f, "-");
+
+ fprintf(f, "%s.%s", p->e.name, h->section);
+ if (e->name)
+ fprintf(f, ".%s", e->name);
+
+ if (h->cmd == UCI_CMD_REMOVE)
+ fprintf(f, "\n");
+ else
+ fprintf(f, "=%s\n", h->value);
+ uci_free_history(h);
+ }
+
+done:
+ uci_close_stream(f);
+ if (filename)
free(filename);
+ if (ctx->errno)
+ UCI_THROW(ctx, ctx->errno);
+
+ return 0;
+}
- if (!file)
- UCI_THROW(ctx, UCI_ERR_IO);
+int uci_commit(struct uci_context *ctx, struct uci_package **package)
+{
+ struct uci_package *p;
+ FILE *f = NULL;
+ char *name = NULL;
+ char *path = NULL;
- return uci_import(ctx, file, name, cfg);
+ UCI_HANDLE_ERR(ctx);
+ UCI_ASSERT(ctx, package != NULL);
+ p = *package;
+
+ UCI_ASSERT(ctx, p != NULL);
+ UCI_ASSERT(ctx, p->path != NULL);
+
+ /* open the config file for writing now, so that it is locked */
+ f = uci_open_stream(ctx, p->path, SEEK_SET, true, true);
+
+ /* flush unsaved changes and reload from history file */
+ UCI_TRAP_SAVE(ctx, done);
+ if (p->confdir) {
+ name = uci_strdup(ctx, p->e.name);
+ path = uci_strdup(ctx, p->path);
+ if (!uci_list_empty(&p->history))
+ UCI_INTERNAL(uci_save, ctx, p);
+ uci_free_package(&p);
+ uci_file_cleanup(ctx);
+ UCI_INTERNAL(uci_import, ctx, f, name, &p, true);
+
+ p->path = path;
+ p->confdir = true;
+ *package = p;
+
+ /* freed together with the uci_package */
+ path = NULL;
+
+ /* check for updated history, just in case */
+ uci_load_history(ctx, p, true);
+ }
+
+ rewind(f);
+ ftruncate(fileno(f), 0);
+
+ uci_export(ctx, f, p, false);
+ UCI_TRAP_RESTORE(ctx);
+
+done:
+ if (name)
+ free(name);
+ if (path)
+ free(path);
+ uci_close_stream(f);
+ if (ctx->errno)
+ UCI_THROW(ctx, ctx->errno);
+
+ return 0;
+}
+
+
+/*
+ * 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
+ * those with a trailing '/'
+ */
+static inline char *get_filename(char *path)
+{
+ char *p;
+
+ p = strrchr(path, '/');
+ p++;
+ if (!*p)
+ return NULL;
+ return p;
+}
+
+int uci_list_configs(struct uci_context *ctx, char ***list)
+{
+ char **configs;
+ glob_t globbuf;
+ int size, i;
+ char *buf;
+
+ UCI_HANDLE_ERR(ctx);
+
+ if (glob(UCI_CONFDIR "/*", GLOB_MARK, NULL, &globbuf) != 0)
+ UCI_THROW(ctx, UCI_ERR_NOTFOUND);
+
+ size = sizeof(char *) * (globbuf.gl_pathc + 1);
+ for(i = 0; i < globbuf.gl_pathc; i++) {
+ char *p;
+
+ p = get_filename(globbuf.gl_pathv[i]);
+ if (!p)
+ continue;
+
+ size += strlen(p) + 1;
+ }
+
+ configs = uci_malloc(ctx, size);
+ buf = (char *) &configs[globbuf.gl_pathc + 1];
+ for(i = 0; i < globbuf.gl_pathc; i++) {
+ char *p;
+
+ p = get_filename(globbuf.gl_pathv[i]);
+ if (!p)
+ continue;
+
+ configs[i] = buf;
+ strcpy(buf, p);
+ buf += strlen(buf) + 1;
+ }
+ *list = configs;
+
+ return 0;
}
projects / project / uci.git / blobdiff