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util-lib: move /proc/cmdline parsing code to proc-cmdline.[ch]

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This commit is contained in:
Lennart Poettering 2015-10-27 00:06:29 +01:00
parent d4510856a0
commit 4e731273ed
24 changed files with 199 additions and 126 deletions
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2
Makefile.am
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@ -799,6 +799,8 @@ libbasic_la_SOURCES = \
src/basic/xattr-util.h \
src/basic/chattr-util.c \
src/basic/chattr-util.h \
src/basic/proc-cmdline.c \
src/basic/proc-cmdline.h \
src/basic/fs-util.c \
src/basic/fs-util.h \
src/basic/stat-util.c \

3
src/backlight/backlight.c
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@ -25,10 +25,11 @@
#include "escape.h"
#include "fileio.h"
#include "mkdir.h"
#include "parse-util.h"
#include "proc-cmdline.h"
#include "string-util.h"
#include "udev-util.h"
#include "util.h"
#include "parse-util.h"
static struct udev_device *find_pci_or_platform_parent(struct udev_device *device) {
struct udev_device *parent;

1
src/basic/cgroup-util.c
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@ -49,6 +49,7 @@
#include "unit-name.h"
#include "user-util.h"
#include "util.h"
#include "proc-cmdline.h"
int cg_enumerate_processes(const char *controller, const char *path, FILE **_f) {
_cleanup_free_ char *fs = NULL;

3
src/basic/log.c
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@ -36,6 +36,8 @@
#include "log.h"
#include "macro.h"
#include "missing.h"
#include "parse-util.h"
#include "proc-cmdline.h"
#include "process-util.h"
#include "signal-util.h"
#include "socket-util.h"
@ -43,7 +45,6 @@
#include "string-util.h"
#include "terminal-util.h"
#include "util.h"
#include "parse-util.h"
#define SNDBUF_SIZE (8*1024*1024)

144
src/basic/proc-cmdline.c Normal file
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@ -0,0 +1,144 @@
/*-*- 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 Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include "extract-word.h"
#include "fileio.h"
#include "macro.h"
#include "parse-util.h"
#include "proc-cmdline.h"
#include "process-util.h"
#include "string-util.h"
#include "util.h"
#include "virt.h"
int proc_cmdline(char **ret) {
assert(ret);
if (detect_container() > 0)
return get_process_cmdline(1, 0, false, ret);
else
return read_one_line_file("/proc/cmdline", ret);
}
int parse_proc_cmdline(int (*parse_item)(const char *key, const char *value)) {
_cleanup_free_ char *line = NULL;
const char *p;
int r;
assert(parse_item);
r = proc_cmdline(&line);
if (r < 0)
return r;
p = line;
for (;;) {
_cleanup_free_ char *word = NULL;
char *value = NULL;
r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_RELAX);
if (r < 0)
return r;
if (r == 0)
break;
/* Filter out arguments that are intended only for the
* initrd */
if (!in_initrd() && startswith(word, "rd."))
continue;
value = strchr(word, '=');
if (value)
*(value++) = 0;
r = parse_item(word, value);
if (r < 0)
return r;
}
return 0;
}
int get_proc_cmdline_key(const char *key, char **value) {
_cleanup_free_ char *line = NULL, *ret = NULL;
bool found = false;
const char *p;
int r;
assert(key);
r = proc_cmdline(&line);
if (r < 0)
return r;
p = line;
for (;;) {
_cleanup_free_ char *word = NULL;
const char *e;
r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_RELAX);
if (r < 0)
return r;
if (r == 0)
break;
/* Filter out arguments that are intended only for the
* initrd */
if (!in_initrd() && startswith(word, "rd."))
continue;
if (value) {
e = startswith(word, key);
if (!e)
continue;
r = free_and_strdup(&ret, e);
if (r < 0)
return r;
found = true;
} else {
if (streq(word, key))
found = true;
}
}
if (value) {
*value = ret;
ret = NULL;
}
return found;
}
int shall_restore_state(void) {
_cleanup_free_ char *value = NULL;
int r;
r = get_proc_cmdline_key("systemd.restore_state=", &value);
if (r < 0)
return r;
if (r == 0)
return true;
return parse_boolean(value) != 0;
}

28
src/basic/proc-cmdline.h Normal file
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@ -0,0 +1,28 @@
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
#pragma once
/***
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 Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
int proc_cmdline(char **ret);
int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
int get_proc_cmdline_key(const char *parameter, char **value);
int shall_restore_state(void);

114
src/basic/util.c
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@ -963,120 +963,6 @@ bool id128_is_valid(const char *s) {
return true;
}
int shall_restore_state(void) {
_cleanup_free_ char *value = NULL;
int r;
r = get_proc_cmdline_key("systemd.restore_state=", &value);
if (r < 0)
return r;
if (r == 0)
return true;
return parse_boolean(value) != 0;
}
int proc_cmdline(char **ret) {
assert(ret);
if (detect_container() > 0)
return get_process_cmdline(1, 0, false, ret);
else
return read_one_line_file("/proc/cmdline", ret);
}
int parse_proc_cmdline(int (*parse_item)(const char *key, const char *value)) {
_cleanup_free_ char *line = NULL;
const char *p;
int r;
assert(parse_item);
r = proc_cmdline(&line);
if (r < 0)
return r;
p = line;
for (;;) {
_cleanup_free_ char *word = NULL;
char *value = NULL;
r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_RELAX);
if (r < 0)
return r;
if (r == 0)
break;
/* Filter out arguments that are intended only for the
* initrd */
if (!in_initrd() && startswith(word, "rd."))
continue;
value = strchr(word, '=');
if (value)
*(value++) = 0;
r = parse_item(word, value);
if (r < 0)
return r;
}
return 0;
}
int get_proc_cmdline_key(const char *key, char **value) {
_cleanup_free_ char *line = NULL, *ret = NULL;
bool found = false;
const char *p;
int r;
assert(key);
r = proc_cmdline(&line);
if (r < 0)
return r;
p = line;
for (;;) {
_cleanup_free_ char *word = NULL;
const char *e;
r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_RELAX);
if (r < 0)
return r;
if (r == 0)
break;
/* Filter out arguments that are intended only for the
* initrd */
if (!in_initrd() && startswith(word, "rd."))
continue;
if (value) {
e = startswith(word, key);
if (!e)
continue;
r = free_and_strdup(&ret, e);
if (r < 0)
return r;
found = true;
} else {
if (streq(word, key))
found = true;
}
}
if (value) {
*value = ret;
ret = NULL;
}
return found;
}
int container_get_leader(const char *machine, pid_t *pid) {
_cleanup_free_ char *s = NULL, *class = NULL;
const char *p;

6
src/basic/util.h
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@ -288,8 +288,6 @@ static inline unsigned log2u_round_up(unsigned x) {
bool id128_is_valid(const char *s) _pure_;
int shall_restore_state(void);
/**
* Normal qsort requires base to be nonnull. Here were require
* that only if nmemb > 0.
@ -302,10 +300,6 @@ static inline void qsort_safe(void *base, size_t nmemb, size_t size, comparison_
qsort(base, nmemb, size, compar);
}
int proc_cmdline(char **ret);
int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
int get_proc_cmdline_key(const char *parameter, char **value);
int container_get_leader(const char *machine, pid_t *pid);
int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *userns_fd, int *root_fd);

1
src/core/main.c
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@ -69,6 +69,7 @@
#include "mount-setup.h"
#include "pager.h"
#include "parse-util.h"
#include "proc-cmdline.h"
#include "process-util.h"
#include "rlimit-util.h"
#include "selinux-setup.h"

1
src/cryptsetup/cryptsetup-generator.c
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@ -31,6 +31,7 @@
#include "mkdir.h"
#include "parse-util.h"
#include "path-util.h"
#include "proc-cmdline.h"
#include "string-util.h"
#include "strv.h"
#include "unit-name.h"

9
src/debug-generator/debug-generator.c
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@ -19,12 +19,13 @@
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include "util.h"
#include "mkdir.h"
#include "parse-util.h"
#include "proc-cmdline.h"
#include "string-util.h"
#include "strv.h"
#include "unit-name.h"
#include "mkdir.h"
#include "string-util.h"
#include "parse-util.h"
#include "util.h"
static const char *arg_dest = "/tmp";
static char **arg_mask = NULL;

1
src/fsck/fsck.c
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@ -40,6 +40,7 @@
#include "fs-util.h"
#include "parse-util.h"
#include "path-util.h"
#include "proc-cmdline.h"
#include "process-util.h"
#include "signal-util.h"
#include "socket-util.h"

1
src/fstab-generator/fstab-generator.c
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@ -35,6 +35,7 @@
#include "mount-util.h"
#include "parse-util.h"
#include "path-util.h"
#include "proc-cmdline.h"
#include "special.h"
#include "stat-util.h"
#include "string-util.h"

1
src/gpt-auto-generator/gpt-auto-generator.c
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@ -41,6 +41,7 @@
#include "mount-util.h"
#include "parse-util.h"
#include "path-util.h"
#include "proc-cmdline.h"
#include "special.h"
#include "stat-util.h"
#include "string-util.h"

1
src/hibernate-resume/hibernate-resume-generator.c
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@ -25,6 +25,7 @@
#include "fstab-util.h"
#include "log.h"
#include "mkdir.h"
#include "proc-cmdline.h"
#include "special.h"
#include "string-util.h"
#include "unit-name.h"

1
src/journal/journald-server.c
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@ -58,6 +58,7 @@
#include "missing.h"
#include "mkdir.h"
#include "parse-util.h"
#include "proc-cmdline.h"
#include "process-util.h"
#include "rm-rf.h"
#include "selinux-util.h"

1
src/modules-load/modules-load.c
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@ -30,6 +30,7 @@
#include "fd-util.h"
#include "fileio.h"
#include "log.h"
#include "proc-cmdline.h"
#include "string-util.h"
#include "strv.h"
#include "util.h"

1
src/quotacheck/quotacheck.c
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@ -29,6 +29,7 @@
#include "signal-util.h"
#include "string-util.h"
#include "util.h"
#include "proc-cmdline.h"
static bool arg_skip = false;
static bool arg_force = false;

1
src/rfkill/rfkill.c
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@ -31,6 +31,7 @@
#include "io-util.h"
#include "mkdir.h"
#include "parse-util.h"
#include "proc-cmdline.h"
#include "string-table.h"
#include "string-util.h"
#include "udev-util.h"

1
src/shared/bus-util.c
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@ -47,6 +47,7 @@
#include "unit-name.h"
#include "utf8.h"
#include "util.h"
#include "proc-cmdline.h"
static int name_owner_change_callback(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
sd_event *e = userdata;

1
src/shared/condition.c
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@ -39,6 +39,7 @@
#include "mount-util.h"
#include "parse-util.h"
#include "path-util.h"
#include "proc-cmdline.h"
#include "selinux-util.h"
#include "smack-util.h"
#include "stat-util.h"

1
src/test/test-util.c
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@ -44,6 +44,7 @@
#include "mkdir.h"
#include "parse-util.h"
#include "path-util.h"
#include "proc-cmdline.h"
#include "process-util.h"
#include "rm-rf.h"
#include "signal-util.h"

1
src/udev/net/link-config.c
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@ -36,6 +36,7 @@
#include "network-internal.h"
#include "parse-util.h"
#include "path-util.h"
#include "proc-cmdline.h"
#include "random-util.h"
#include "stat-util.h"
#include "string-table.h"

1
src/udev/udevd.c
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@ -55,6 +55,7 @@
#include "io-util.h"
#include "netlink-util.h"
#include "parse-util.h"
#include "proc-cmdline.h"
#include "process-util.h"
#include "selinux-util.h"
#include "signal-util.h"