util: move all to shared/ and split external dependencies in separate internal libraries

Before:
  $ ldd /lib/systemd/systemd-timestamp
  linux-vdso.so.1 =>  (0x00007fffb05ff000)
  libselinux.so.1 => /lib64/libselinux.so.1 (0x00007f90aac57000)
  libcap.so.2 => /lib64/libcap.so.2 (0x00007f90aaa53000)
  librt.so.1 => /lib64/librt.so.1 (0x00007f90aa84a000)
  libc.so.6 => /lib64/libc.so.6 (0x00007f90aa494000)
  /lib64/ld-linux-x86-64.so.2 (0x00007f90aae90000)
  libdl.so.2 => /lib64/libdl.so.2 (0x00007f90aa290000)
  libattr.so.1 => /lib64/libattr.so.1 (0x00007f90aa08a000)
  libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f90a9e6e000)

After:
  $ ldd systemd-timestamp
  linux-vdso.so.1 =>  (0x00007fff3cbff000)
  libselinux.so.1 => /lib64/libselinux.so.1 (0x00007f5eaa1c3000)
  librt.so.1 => /lib64/librt.so.1 (0x00007f5ea9fbb000)
  libc.so.6 => /lib64/libc.so.6 (0x00007f5ea9c04000)
  /lib64/ld-linux-x86-64.so.2 (0x00007f5eaa3fc000)
  libdl.so.2 => /lib64/libdl.so.2 (0x00007f5ea9a00000)
  libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f5ea97e4000)

1 files changed, 852 insertions, 0 deletions

diff --git a/src/shared/conf-parser.c b/src/shared/conf-parser.c
new file mode 100644
index 0000000000..a9b01135e6
--- /dev/null
+++ b/src/shared/conf-parser.c
@@ -0,0 +1,852 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  systemd 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.
+
+  You should have received a copy of the GNU General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+#include <assert.h>
+#include <stdlib.h>
+
+#include "conf-parser.h"
+#include "util.h"
+#include "macro.h"
+#include "strv.h"
+#include "log.h"
+#include "utf8.h"
+
+int config_item_table_lookup(
+                void *table,
+                const char *section,
+                const char *lvalue,
+                ConfigParserCallback *func,
+                int *ltype,
+                void **data,
+                void *userdata) {
+
+        ConfigTableItem *t;
+
+        assert(table);
+        assert(lvalue);
+        assert(func);
+        assert(ltype);
+        assert(data);
+
+        for (t = table; t->lvalue; t++) {
+
+                if (!streq(lvalue, t->lvalue))
+                        continue;
+
+                if (!streq_ptr(section, t->section))
+                        continue;
+
+                *func = t->parse;
+                *ltype = t->ltype;
+                *data = t->data;
+                return 1;
+        }
+
+        return 0;
+}
+
+int config_item_perf_lookup(
+                void *table,
+                const char *section,
+                const char *lvalue,
+                ConfigParserCallback *func,
+                int *ltype,
+                void **data,
+                void *userdata) {
+
+        ConfigPerfItemLookup lookup = (ConfigPerfItemLookup) table;
+        const ConfigPerfItem *p;
+
+        assert(table);
+        assert(lvalue);
+        assert(func);
+        assert(ltype);
+        assert(data);
+
+        if (!section)
+                p = lookup(lvalue, strlen(lvalue));
+        else {
+                char *key;
+
+                key = join(section, ".", lvalue, NULL);
+                if (!key)
+                        return -ENOMEM;
+
+                p = lookup(key, strlen(key));
+                free(key);
+        }
+
+        if (!p)
+                return 0;
+
+        *func = p->parse;
+        *ltype = p->ltype;
+        *data = (uint8_t*) userdata + p->offset;
+        return 1;
+}
+
+/* Run the user supplied parser for an assignment */
+static int next_assignment(
+                const char *filename,
+                unsigned line,
+                ConfigItemLookup lookup,
+                void *table,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                bool relaxed,
+                void *userdata) {
+
+        ConfigParserCallback func = NULL;
+        int ltype = 0;
+        void *data = NULL;
+        int r;
+
+        assert(filename);
+        assert(line > 0);
+        assert(lookup);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = lookup(table, section, lvalue, &func, &ltype, &data, userdata);
+        if (r < 0)
+                return r;
+
+        if (r > 0) {
+                if (func)
+                        return func(filename, line, section, lvalue, ltype, rvalue, data, userdata);
+
+                return 0;
+        }
+
+        /* Warn about unknown non-extension fields. */
+        if (!relaxed && !startswith(lvalue, "X-"))
+                log_info("[%s:%u] Unknown lvalue '%s' in section '%s'. Ignoring.", filename, line, lvalue, section);
+
+        return 0;
+}
+
+/* Parse a variable assignment line */
+static int parse_line(
+                const char *filename,
+                unsigned line,
+                const char *sections,
+                ConfigItemLookup lookup,
+                void *table,
+                bool relaxed,
+                char **section,
+                char *l,
+                void *userdata) {
+
+        char *e;
+
+        assert(filename);
+        assert(line > 0);
+        assert(lookup);
+        assert(l);
+
+        l = strstrip(l);
+
+        if (!*l)
+                return 0;
+
+        if (strchr(COMMENTS, *l))
+                return 0;
+
+        if (startswith(l, ".include ")) {
+                char *fn;
+                int r;
+
+                fn = file_in_same_dir(filename, strstrip(l+9));
+                if (!fn)
+                        return -ENOMEM;
+
+                r = config_parse(fn, NULL, sections, lookup, table, relaxed, userdata);
+                free(fn);
+
+                return r;
+        }
+
+        if (*l == '[') {
+                size_t k;
+                char *n;
+
+                k = strlen(l);
+                assert(k > 0);
+
+                if (l[k-1] != ']') {
+                        log_error("[%s:%u] Invalid section header.", filename, line);
+                        return -EBADMSG;
+                }
+
+                n = strndup(l+1, k-2);
+                if (!n)
+                        return -ENOMEM;
+
+                if (sections && !nulstr_contains(sections, n)) {
+
+                        if (!relaxed)
+                                log_info("[%s:%u] Unknown section '%s'. Ignoring.", filename, line, n);
+
+                        free(n);
+                        *section = NULL;
+                } else {
+                        free(*section);
+                        *section = n;
+                }
+
+                return 0;
+        }
+
+        if (sections && !*section) {
+
+                if (!relaxed)
+                        log_info("[%s:%u] Assignment outside of section. Ignoring.", filename, line);
+
+                return 0;
+        }
+
+        e = strchr(l, '=');
+        if (!e) {
+                log_error("[%s:%u] Missing '='.", filename, line);
+                return -EBADMSG;
+        }
+
+        *e = 0;
+        e++;
+
+        return next_assignment(
+                        filename,
+                        line,
+                        lookup,
+                        table,
+                        *section,
+                        strstrip(l),
+                        strstrip(e),
+                        relaxed,
+                        userdata);
+}
+
+/* Go through the file and parse each line */
+int config_parse(
+                const char *filename,
+                FILE *f,
+                const char *sections,
+                ConfigItemLookup lookup,
+                void *table,
+                bool relaxed,
+                void *userdata) {
+
+        unsigned line = 0;
+        char *section = NULL;
+        int r;
+        bool ours = false;
+        char *continuation = NULL;
+
+        assert(filename);
+        assert(lookup);
+
+        if (!f) {
+                f = fopen(filename, "re");
+                if (!f) {
+                        r = -errno;
+                        log_error("Failed to open configuration file '%s': %s", filename, strerror(-r));
+                        goto finish;
+                }
+
+                ours = true;
+        }
+
+        while (!feof(f)) {
+                char l[LINE_MAX], *p, *c = NULL, *e;
+                bool escaped = false;
+
+                if (!fgets(l, sizeof(l), f)) {
+                        if (feof(f))
+                                break;
+
+                        r = -errno;
+                        log_error("Failed to read configuration file '%s': %s", filename, strerror(-r));
+                        goto finish;
+                }
+
+                truncate_nl(l);
+
+                if (continuation) {
+                        c = strappend(continuation, l);
+                        if (!c) {
+                                r = -ENOMEM;
+                                goto finish;
+                        }
+
+                        free(continuation);
+                        continuation = NULL;
+                        p = c;
+                } else
+                        p = l;
+
+                for (e = p; *e; e++) {
+                        if (escaped)
+                                escaped = false;
+                        else if (*e == '\\')
+                                escaped = true;
+                }
+
+                if (escaped) {
+                        *(e-1) = ' ';
+
+                        if (c)
+                                continuation = c;
+                        else {
+                                continuation = strdup(l);
+                                if (!continuation) {
+                                        r = -ENOMEM;
+                                        goto finish;
+                                }
+                        }
+
+                        continue;
+                }
+
+                r = parse_line(filename,
+                                ++line,
+                                sections,
+                                lookup,
+                                table,
+                                relaxed,
+                                &section,
+                                p,
+                                userdata);
+                free(c);
+
+                if (r < 0)
+                        goto finish;
+        }
+
+        r = 0;
+
+finish:
+        free(section);
+        free(continuation);
+
+        if (f && ours)
+                fclose(f);
+
+        return r;
+}
+
+int config_parse_int(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        int *i = data;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if ((r = safe_atoi(rvalue, i)) < 0) {
+                log_error("[%s:%u] Failed to parse numeric value, ingoring: %s", filename, line, rvalue);
+                return 0;
+        }
+
+        return 0;
+}
+
+int config_parse_long(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        long *i = data;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if ((r = safe_atoli(rvalue, i)) < 0) {
+                log_error("[%s:%u] Failed to parse numeric value, ignoring: %s", filename, line, rvalue);
+                return 0;
+        }
+
+        return 0;
+}
+
+int config_parse_uint64(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        uint64_t *u = data;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if ((r = safe_atou64(rvalue, u)) < 0) {
+                log_error("[%s:%u] Failed to parse numeric value, ignoring: %s", filename, line, rvalue);
+                return 0;
+        }
+
+        return 0;
+}
+
+int config_parse_unsigned(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        unsigned *u = data;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if ((r = safe_atou(rvalue, u)) < 0) {
+                log_error("[%s:%u] Failed to parse numeric value: %s", filename, line, rvalue);
+                return r;
+        }
+
+        return 0;
+}
+
+int config_parse_bytes_size(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        size_t *sz = data;
+        off_t o;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (parse_bytes(rvalue, &o) < 0 || (off_t) (size_t) o != o) {
+                log_error("[%s:%u] Failed to parse byte value, ignoring: %s", filename, line, rvalue);
+                return 0;
+        }
+
+        *sz = (size_t) o;
+        return 0;
+}
+
+
+int config_parse_bytes_off(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        off_t *bytes = data;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        assert_cc(sizeof(off_t) == sizeof(uint64_t));
+
+        if (parse_bytes(rvalue, bytes) < 0) {
+                log_error("[%s:%u] Failed to parse bytes value, ignoring: %s", filename, line, rvalue);
+                return 0;
+        }
+
+        return 0;
+}
+
+int config_parse_bool(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        int k;
+        bool *b = data;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if ((k = parse_boolean(rvalue)) < 0) {
+                log_error("[%s:%u] Failed to parse boolean value, ignoring: %s", filename, line, rvalue);
+                return 0;
+        }
+
+        *b = !!k;
+        return 0;
+}
+
+int config_parse_tristate(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        int k;
+        int *b = data;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        /* Tristates are like booleans, but can also take the 'default' value, i.e. "-1" */
+
+        k = parse_boolean(rvalue);
+        if (k < 0) {
+                log_error("[%s:%u] Failed to parse boolean value, ignoring: %s", filename, line, rvalue);
+                return 0;
+        }
+
+        *b = !!k;
+        return 0;
+}
+
+int config_parse_string(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        char **s = data;
+        char *n;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        n = cunescape(rvalue);
+        if (!n)
+                return -ENOMEM;
+
+        if (!utf8_is_valid(n)) {
+                log_error("[%s:%u] String is not UTF-8 clean, ignoring assignment: %s", filename, line, rvalue);
+                free(n);
+                return 0;
+        }
+
+        free(*s);
+        if (*n)
+                *s = n;
+        else {
+                free(n);
+                *s = NULL;
+        }
+
+        return 0;
+}
+
+int config_parse_path(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        char **s = data;
+        char *n;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (!utf8_is_valid(rvalue)) {
+                log_error("[%s:%u] Path is not UTF-8 clean, ignoring assignment: %s", filename, line, rvalue);
+                return 0;
+        }
+
+        if (!path_is_absolute(rvalue)) {
+                log_error("[%s:%u] Not an absolute path, ignoring: %s", filename, line, rvalue);
+                return 0;
+        }
+
+        n = strdup(rvalue);
+        if (!n)
+                return -ENOMEM;
+
+        path_kill_slashes(n);
+
+        free(*s);
+        *s = n;
+
+        return 0;
+}
+
+int config_parse_strv(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        char*** sv = data;
+        char **n;
+        char *w;
+        unsigned k;
+        size_t l;
+        char *state;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        k = strv_length(*sv);
+        FOREACH_WORD_QUOTED(w, l, rvalue, state)
+                k++;
+
+        n = new(char*, k+1);
+        if (!n)
+                return -ENOMEM;
+
+        if (*sv)
+                for (k = 0; (*sv)[k]; k++)
+                        n[k] = (*sv)[k];
+        else
+                k = 0;
+
+        FOREACH_WORD_QUOTED(w, l, rvalue, state) {
+                n[k] = cunescape_length(w, l);
+                if (!n[k]) {
+                        r = -ENOMEM;
+                        goto fail;
+                }
+
+                if (!utf8_is_valid(n[k])) {
+                        log_error("[%s:%u] String is not UTF-8 clean, ignoring assignment: %s", filename, line, rvalue);
+                        free(n[k]);
+                        continue;
+                }
+
+                k++;
+        }
+
+        n[k] = NULL;
+        free(*sv);
+        *sv = n;
+
+        return 0;
+
+fail:
+        for (; k > 0; k--)
+                free(n[k-1]);
+        free(n);
+
+        return r;
+}
+
+int config_parse_path_strv(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        char*** sv = data;
+        char **n;
+        char *w;
+        unsigned k;
+        size_t l;
+        char *state;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        k = strv_length(*sv);
+        FOREACH_WORD_QUOTED(w, l, rvalue, state)
+                k++;
+
+        n = new(char*, k+1);
+        if (!n)
+                return -ENOMEM;
+
+        k = 0;
+        if (*sv)
+                for (; (*sv)[k]; k++)
+                        n[k] = (*sv)[k];
+
+        FOREACH_WORD_QUOTED(w, l, rvalue, state) {
+                n[k] = strndup(w, l);
+                if (!n[k]) {
+                        r = -ENOMEM;
+                        goto fail;
+                }
+
+                if (!utf8_is_valid(n[k])) {
+                        log_error("[%s:%u] Path is not UTF-8 clean, ignoring assignment: %s", filename, line, rvalue);
+                        free(n[k]);
+                        continue;
+                }
+
+                if (!path_is_absolute(n[k])) {
+                        log_error("[%s:%u] Not an absolute path, ignoring: %s", filename, line, rvalue);
+                        free(n[k]);
+                        continue;
+                }
+
+                path_kill_slashes(n[k]);
+                k++;
+        }
+
+        n[k] = NULL;
+        free(*sv);
+        *sv = n;
+
+        return 0;
+
+fail:
+        for (; k > 0; k--)
+                free(n[k-1]);
+        free(n);
+
+        return r;
+}
+
+int config_parse_usec(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        usec_t *usec = data;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (parse_usec(rvalue, usec) < 0) {
+                log_error("[%s:%u] Failed to parse time value, ignoring: %s", filename, line, rvalue);
+                return 0;
+        }
+
+        return 0;
+}
+
+int config_parse_mode(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        mode_t *m = data;
+        long l;
+        char *x = NULL;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        errno = 0;
+        l = strtol(rvalue, &x, 8);
+        if (!x || *x || errno) {
+                log_error("[%s:%u] Failed to parse mode value, ignoring: %s", filename, line, rvalue);
+                return 0;
+        }
+
+        if (l < 0000 || l > 07777) {
+                log_error("[%s:%u] mode value out of range, ignoring: %s", filename, line, rvalue);
+                return 0;
+        }
+
+        *m = (mode_t) l;
+        return 0;
+}