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procps/src/sysctl.c
Craig Small dd60d6d6e8 misc: Move all binaries to src 
*.c -> src/
ps/* src/ps/
top/* src/top/

Signed-off-by: Craig Small <csmall@dropbear.xyz>
2022-08-29 18:29:28 +10:00

1069 lines
25 KiB
C
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/*
* Sysctl 1.01 - A utility to read and manipulate the sysctl parameters
*
* "Copyright 1999 George Staikos
*
* This program 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.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Part of this code comes from systemd, especially sysctl.c
* Changelog:
* v1.01:
* - added -p <preload> to preload values from a file
* Horms:
* - added -q to be quiet when modifying values
*
* Changes by Albert Cahalan, 2002.
*/
#include <dirent.h>
#include <errno.h>
#include <getopt.h>
#include <glob.h>
#include <libgen.h>
#include <limits.h>
#include <regex.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <ctype.h>
#include "c.h"
#include "fileutils.h"
#include "nls.h"
#include "xalloc.h"
#include "procio.h"
/*
* Globals...
*/
static const char PROC_PATH[] = "/proc/sys/";
static const char DEFAULT_PRELOAD[] = "/etc/sysctl.conf";
static const char *DEPRECATED[] = {
"base_reachable_time",
"retrans_time",
""
};
static bool IgnoreDeprecated;
static bool NameOnly;
static bool PrintName;
static bool PrintNewline;
static bool IgnoreError;
static bool Quiet;
static bool DryRun;
static char *pattern;
#define LINELEN 4096
static char *iobuf;
static size_t iolen = LINELEN;
typedef struct SysctlSetting {
char *key;
char *path;
char *value;
bool ignore_failure;
bool glob_exclude;
struct SysctlSetting *next;
} SysctlSetting;
typedef struct SettingList {
struct SysctlSetting *head;
struct SysctlSetting *tail;
} SettingList;
#define GLOB_CHARS "*?["
static inline bool string_is_glob(const char *p)
{
return !!strpbrk(p, GLOB_CHARS);
}
/* Function prototypes. */
static int pattern_match(const char *string, const char *pat);
static int DisplayAll(const char *restrict const path);
static inline bool is_proc_path(
const char *path)
{
char *resolved_path;
if ( (resolved_path = realpath(path, NULL)) == NULL)
return false;
if (strncmp(PROC_PATH, resolved_path, strlen(PROC_PATH)) == 0) {
free(resolved_path);
return true;
}
xwarnx(_("Path is not under %s: %s"), PROC_PATH, path);
free(resolved_path);
return false;
}
static void slashdot(char *restrict p, char old, char new)
{
int warned = 1;
p = strpbrk(p, "/.");
if (!p)
/* nothing -- can't be, but oh well */
return;
if (*p == new)
/* already in desired format */
return;
while (p) {
char c = *p;
if ((*(p + 1) == '/' || *(p + 1) == '.') && warned) {
xwarnx(_("separators should not be repeated: %s"), p);
warned = 0;
}
if (c == old)
*p = new;
if (c == new)
*p = old;
p = strpbrk(p + 1, "/.");
}
}
#if 0 // avoid '-Wunused-function' warning
static void setting_free(SysctlSetting *s) {
if (!s)
return;
free(s->key);
free(s->path);
free(s->value);
free(s);
}
#endif
static SysctlSetting *setting_new(
const char *key,
const char *value,
bool ignore_failure,
bool glob_exclude) {
SysctlSetting *s = NULL;
char *path = NULL;
int proc_len;
proc_len = strlen(PROC_PATH);
/* used to open the file */
path = xmalloc(strlen(key) + proc_len + 2);
strcpy(path, PROC_PATH);
if (key[0] == '-')
strcat(path + proc_len, key+1);
else
strcat(path + proc_len, key);
/* change . to / for path */
slashdot(path + proc_len, '.', '/');
s = xmalloc(sizeof(SysctlSetting));
*s = (SysctlSetting) {
.key = strdup(key),
.path = path,
.value = value? strdup(value): NULL,
.ignore_failure = ignore_failure,
.glob_exclude = glob_exclude,
.next = NULL,
};
return s;
}
static void settinglist_add(SettingList *l, SysctlSetting *s) {
SysctlSetting *old_tail;
if (!l)
return;
if (l->head == NULL)
l->head = s;
if (l->tail != NULL) {
old_tail = l->tail;
old_tail->next = s;
}
l->tail = s;
}
static SysctlSetting *settinglist_findpath(const SettingList *l, const char *path) {
SysctlSetting *node;
for (node=l->head; node != NULL; node = node->next) {
if (strcmp(node->path, path) == 0)
return node;
}
return NULL;
}
/* Function prototypes. */
static int pattern_match(const char *string, const char *pat);
static int DisplayAll(const char *restrict const path);
/*
* Display the usage format
*/
static void __attribute__ ((__noreturn__))
Usage(FILE * out)
{
fputs(USAGE_HEADER, out);
fprintf(out,
_(" %s [options] [variable[=value] ...]\n"),
program_invocation_short_name);
fputs(USAGE_OPTIONS, out);
fputs(_(" -a, --all display all variables\n"), out);
fputs(_(" -A alias of -a\n"), out);
fputs(_(" -X alias of -a\n"), out);
fputs(_(" --deprecated include deprecated parameters to listing\n"), out);
fputs(_(" --dry-run Print the key and values but do not write\n"), out);
fputs(_(" -b, --binary print value without new line\n"), out);
fputs(_(" -e, --ignore ignore unknown variables errors\n"), out);
fputs(_(" -N, --names print variable names without values\n"), out);
fputs(_(" -n, --values print only values of the given variable(s)\n"), out);
fputs(_(" -p, --load[=<file>] read values from file\n"), out);
fputs(_(" -f alias of -p\n"), out);
fputs(_(" --system read values from all system directories\n"), out);
fputs(_(" -r, --pattern <expression>\n"
" select setting that match expression\n"), out);
fputs(_(" -q, --quiet do not echo variable set\n"), out);
fputs(_(" -w, --write enable writing a value to variable\n"), out);
fputs(_(" -o does nothing\n"), out);
fputs(_(" -x does nothing\n"), out);
fputs(_(" -d alias of -h\n"), out);
fputs(USAGE_SEPARATOR, out);
fputs(USAGE_HELP, out);
fputs(USAGE_VERSION, out);
fprintf(out, USAGE_MAN_TAIL("sysctl(8)"));
exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
}
/*
* Strip left/leading side of a string
*/
static char *lstrip(char *line)
{
char *start;
if (!line || !*line)
return line;
start = line;
while(isspace(*start)) start++;
return start;
}
/*
* Strip right/trailing side of a string
* by placing a \0
*/
static void rstrip(char *line)
{
char *end;
if (!line || !*line)
return;
end = line + strlen(line) - 1;
while(end > line && isspace(*end)) end--;
end[1] = '\0';
}
#if 0 // avoid '-Wunused-function' warning
/*
* Strip the leading and trailing spaces from a string
*/
static char *StripLeadingAndTrailingSpaces(char *oneline)
{
char *t;
if (!oneline || !*oneline)
return oneline;
t = oneline;
t += strlen(oneline) - 1;
while ((*t == ' ' || *t == '\t' || *t == '\n' || *t == '\r') && t != oneline)
*t-- = 0;
t = oneline;
while ((*t == ' ' || *t == '\t') && *t != 0)
t++;
return t;
}
#endif
/*
* Read a sysctl setting
*/
static int ReadSetting(const char *restrict const name)
{
int rc = EXIT_SUCCESS;
char *restrict tmpname;
char *restrict outname;
ssize_t rlen;
FILE *restrict fp;
struct stat ts;
if (!name || !*name) {
xwarnx(_("\"%s\" is an unknown key"), name);
return -1;
}
/* used to display the output */
outname = xstrdup(name);
/* change / to . */
slashdot(outname, '/', '.');
/* used to open the file */
tmpname = xmalloc(strlen(name) + strlen(PROC_PATH) + 2);
strcpy(tmpname, PROC_PATH);
strcat(tmpname, name);
/* change . to / */
slashdot(tmpname + strlen(PROC_PATH), '.', '/');
/* used to display the output */
outname = xstrdup(name);
/* change / to . */
slashdot(outname, '/', '.');
if (stat(tmpname, &ts) < 0) {
if (!IgnoreError) {
xwarn(_("cannot stat %s"), tmpname);
rc = EXIT_FAILURE;
}
goto out;
}
if ((ts.st_mode & S_IRUSR) == 0)
goto out;
if (!is_proc_path(tmpname)) {
rc = -1;
goto out;
}
if (S_ISDIR(ts.st_mode)) {
size_t len;
len = strlen(tmpname);
tmpname[len] = '/';
tmpname[len + 1] = '\0';
rc = DisplayAll(tmpname);
goto out;
}
if (pattern && !pattern_match(outname, pattern)) {
rc = EXIT_SUCCESS;
goto out;
}
if (NameOnly) {
fprintf(stdout, "%s\n", outname);
goto out;
}
fp = fprocopen(tmpname, "r");
if (!fp) {
switch (errno) {
case ENOENT:
if (!IgnoreError) {
xwarnx(_("\"%s\" is an unknown key"), outname);
rc = EXIT_FAILURE;
}
break;
case EACCES:
xwarnx(_("permission denied on key '%s'"), outname);
rc = EXIT_FAILURE;
break;
case EIO: /* Ignore stable_secret below /proc/sys/net/ipv6/conf */
rc = EXIT_FAILURE;
break;
default:
xwarn(_("reading key \"%s\""), outname);
rc = EXIT_FAILURE;
break;
}
} else {
errno = 0;
if ((rlen = getline(&iobuf, &iolen, fp)) > 0) {
/* this loop is required, see
* /sbin/sysctl -a | egrep -6 dev.cdrom.info
*/
do {
char *nlptr;
if (PrintName) {
fprintf(stdout, "%s = ", outname);
do {
fprintf(stdout, "%s", iobuf);
nlptr = &iobuf[strlen(iobuf) - 1];
/* already has the \n in it */
if (*nlptr == '\n')
break;
} while ((rlen = getline(&iobuf, &iolen, fp)) > 0);
if (*nlptr != '\n')
putchar('\n');
} else {
if (!PrintNewline) {
nlptr = strchr(iobuf, '\n');
if (nlptr)
*nlptr = '\0';
}
fprintf(stdout, "%s", iobuf);
}
} while ((rlen = getline(&iobuf, &iolen, fp)) > 0);
} else {
switch (errno) {
case EACCES:
xwarnx(_("permission denied on key '%s'"),
outname);
rc = EXIT_FAILURE;
break;
case EISDIR: {
size_t len;
len = strlen(tmpname);
tmpname[len] = '/';
tmpname[len + 1] = '\0';
fclose(fp);
rc = DisplayAll(tmpname);
goto out;
}
case EIO: /* Ignore stable_secret below /proc/sys/net/ipv6/conf */
rc = EXIT_FAILURE;
break;
default:
xwarnx(_("reading key \"%s\""), outname);
rc = EXIT_FAILURE;
case 0:
break;
}
}
fclose(fp);
}
out:
free(tmpname);
free(outname);
return rc;
}
static int is_deprecated(char *filename)
{
int i;
for (i = 0; strlen(DEPRECATED[i]); i++) {
if (strcmp(DEPRECATED[i], filename) == 0)
return 1;
}
return 0;
}
/*
* Display all the sysctl settings
*/
static int DisplayAll(const char *restrict const path)
{
int rc = EXIT_SUCCESS;
int rc2;
DIR *restrict dp;
struct dirent *restrict de;
struct stat ts;
dp = opendir(path);
if (!dp) {
xwarnx(_("unable to open directory \"%s\""), path);
rc = EXIT_FAILURE;
} else {
readdir(dp); /* skip . */
readdir(dp); /* skip .. */
while ((de = readdir(dp))) {
char *restrict tmpdir;
if (IgnoreDeprecated && is_deprecated(de->d_name))
continue;
tmpdir =
(char *restrict) xmalloc(strlen(path) +
strlen(de->d_name) +
2);
sprintf(tmpdir, "%s%s", path, de->d_name);
rc2 = stat(tmpdir, &ts);
if (rc2 != 0) {
xwarn(_("cannot stat %s"), tmpdir);
} else {
if (S_ISDIR(ts.st_mode)) {
strcat(tmpdir, "/");
DisplayAll(tmpdir);
} else {
rc |=
ReadSetting(tmpdir +
strlen(PROC_PATH));
}
}
free(tmpdir);
}
closedir(dp);
}
return rc;
}
/*
* Write a sysctl setting
*/
static int WriteSetting(
const char *key,
const char *path,
const char *value,
const bool ignore_failure)
{
int rc = EXIT_SUCCESS;
FILE *fp;
struct stat ts;
char *dotted_key;
if (!key || !path)
return rc;
if (stat(path, &ts) < 0) {
if (!IgnoreError) {
xwarn(_("cannot stat %s"), path);
rc = EXIT_FAILURE;
}
return rc;
}
if (!is_proc_path(path)) {
return EXIT_FAILURE;
}
/* Convert the globbed path into a dotted key */
if ( (dotted_key = strdup(path + strlen(PROC_PATH))) == NULL) {
xerrx(EXIT_FAILURE, _("strdup key"));
return EXIT_FAILURE;
}
slashdot(dotted_key, '/', '.');
if ((ts.st_mode & S_IWUSR) == 0) {
xwarn(_("setting key \"%s\""), dotted_key);
free(dotted_key);
return rc;
}
if (S_ISDIR(ts.st_mode)) {
xwarn(_("setting key \"%s\""), dotted_key);
free(dotted_key);
return rc;
}
if (!DryRun) {
if ((fp = fprocopen(path, "w")) == NULL) {
switch (errno) {
case ENOENT:
if (!IgnoreError) {
xwarnx(_("\"%s\" is an unknown key%s"),
dotted_key, (ignore_failure?_(", ignoring"):""));
if (!ignore_failure)
rc = EXIT_FAILURE;
}
break;
case EPERM:
case EROFS:
case EACCES:
xwarnx(_("permission denied on key \"%s\"%s"),
dotted_key, (ignore_failure?_(", ignoring"):""));
break;
default:
xwarn(_("setting key \"%s\"%s"),
dotted_key, (ignore_failure?_(", ignoring"):""));
break;
}
if (!ignore_failure && errno != ENOENT)
rc = EXIT_FAILURE;
} else {
if (0 < fprintf(fp, "%s\n", value))
rc = EXIT_SUCCESS;
if (close_stream(fp) != 0) {
xwarn(_("setting key \"%s\""), dotted_key);
free(dotted_key);
return EXIT_FAILURE;
}
}
}
if ((rc == EXIT_SUCCESS && !Quiet) || DryRun) {
if (NameOnly) {
printf("%s\n", value);
} else {
if (PrintName) {
printf("%s = %s\n", dotted_key, value);
} else {
if (PrintNewline)
printf("%s\n", value);
else
printf("%s", value);
}
}
}
free(dotted_key);
return rc;
}
/*
* parse each configuration line, there are multiple ways of specifying
* a key/value here:
*
* key = value simple setting
* -key = value ignore errors
* key.pattern.*.with.glob = value set keys that match glob
* -key.pattern.exclude.with.glob dont set this value
* key.pattern.override.with.glob = value set this glob match to value
*
*/
static SysctlSetting *parse_setting_line(
const char *path,
const int linenum,
char *line)
{
char *key;
char *value;
bool glob_exclude = FALSE;
bool ignore_failure = FALSE;
key = lstrip(line);
if (strlen(key) < 2)
return NULL;
/* skip over comments */
if (key[0] == '#' || key[0] == ';')
return NULL;
if (pattern && !pattern_match(key, pattern))
return NULL;
value = strchr(key, '=');
if (value == NULL) {
if (key[0] == '-') {
glob_exclude = TRUE;
key++;
value = NULL;
rstrip(key);
} else {
xwarnx(_("%s(%d): invalid syntax, continuing..."),
path, linenum);
return NULL;
}
} else {
value[0]='\0';
if (key[0] == '-') {
ignore_failure = TRUE;
key++;
}
value++; // skip over =
value=lstrip(value);
rstrip(value);
rstrip(key);
}
return setting_new(key, value, ignore_failure, glob_exclude);
}
/* Go through the setting list, expand and sort out
* setting globs and actually write the settings out
*/
static int write_setting_list(const SettingList *sl)
{
SysctlSetting *node;
int rc = EXIT_SUCCESS;
for (node=sl->head; node != NULL; node=node->next) {
if (node->glob_exclude)
continue;
if (string_is_glob(node->path)) {
glob_t globbuf;
int i;
if (glob(node->path, 0, NULL, &globbuf) != 0)
continue;
for(i=0; i < globbuf.gl_pathc; i++) {
if (settinglist_findpath(sl, globbuf.gl_pathv[i]))
continue; // override or exclude
rc |= WriteSetting(node->key, globbuf.gl_pathv[i], node->value,
node->ignore_failure);
}
} else {
rc |= WriteSetting(node->key, node->path, node->value,
node->ignore_failure);
}
}
return rc;
}
static int pattern_match(const char *string, const char *pat)
{
int status;
regex_t re;
if (regcomp(&re, pat, REG_EXTENDED | REG_NOSUB) != 0)
return (0);
status = regexec(&re, string, (size_t) 0, NULL, 0);
regfree(&re);
if (status != 0)
return (0);
return (1);
}
/*
* Preload the sysctl's from the conf file. We parse the file and then
* reform it (strip out whitespace).
*/
static int Preload(SettingList *setlist, const char *restrict const filename)
{
FILE *fp;
int n = 0;
int rc = EXIT_SUCCESS;
ssize_t rlen;
glob_t globbuf;
int globerr;
int globflg;
int j;
globflg = GLOB_NOCHECK;
#ifdef GLOB_BRACE
globflg |= GLOB_BRACE;
#endif
#ifdef GLOB_TILDE
globflg |= GLOB_TILDE;
#else
if (filename[0] == '~')
xwarnx(_("GLOB_TILDE is not supported on your platform, "
"the tilde in \"%s\" won't be expanded."), filename);
#endif
globerr = glob(filename, globflg, NULL, &globbuf);
if (globerr != 0 && globerr != GLOB_NOMATCH)
xerr(EXIT_FAILURE, _("glob failed"));
for (j = 0; j < globbuf.gl_pathc; j++) {
fp = (globbuf.gl_pathv[j][0] == '-' && !globbuf.gl_pathv[j][1])
? stdin : fopen(globbuf.gl_pathv[j], "r");
if (!fp) {
xwarn(_("cannot open \"%s\""), globbuf.gl_pathv[j]);
return EXIT_FAILURE;
}
while ((rlen = getline(&iobuf, &iolen, fp)) > 0) {
SysctlSetting *setting;
n++;
if (rlen < 2)
continue;
if ( (setting = parse_setting_line(globbuf.gl_pathv[j], n, iobuf))
== NULL)
continue;
settinglist_add(setlist, setting);
}
fclose(fp);
}
return rc;
}
struct pair {
char *name;
char *value;
};
static int sortpairs(const void *A, const void *B)
{
const struct pair *a = *(struct pair * const *) A;
const struct pair *b = *(struct pair * const *) B;
return strcmp(a->name, b->name);
}
static int PreloadSystem(SettingList *setlist)
{
unsigned di, i;
const char *dirs[] = {
"/etc/sysctl.d",
"/run/sysctl.d",
"/usr/local/lib/sysctl.d",
"/usr/lib/sysctl.d",
"/lib/sysctl.d",
};
struct pair **cfgs = NULL;
unsigned ncfgs = 0;
int rc = EXIT_SUCCESS;
struct stat ts;
enum { nprealloc = 16 };
for (di = 0; di < sizeof(dirs) / sizeof(dirs[0]); ++di) {
struct dirent *de;
DIR *dp = opendir(dirs[di]);
if (!dp)
continue;
while ((de = readdir(dp))) {
if (!strcmp(de->d_name, ".")
|| !strcmp(de->d_name, ".."))
continue;
if (strlen(de->d_name) < 5
|| strcmp(de->d_name + strlen(de->d_name) - 5, ".conf"))
continue;
/* check if config already known */
for (i = 0; i < ncfgs; ++i) {
if (cfgs && !strcmp(cfgs[i]->name, de->d_name))
break;
}
if (i < ncfgs)
/* already in */
continue;
if (ncfgs % nprealloc == 0)
cfgs =
xrealloc(cfgs,
sizeof(struct pair *) * (ncfgs +
nprealloc));
if (cfgs) {
cfgs[ncfgs] =
xmalloc(sizeof(struct pair) +
strlen(de->d_name) * 2 + 2 +
strlen(dirs[di]) + 1);
cfgs[ncfgs]->name =
(char *)cfgs[ncfgs] + sizeof(struct pair);
strcpy(cfgs[ncfgs]->name, de->d_name);
cfgs[ncfgs]->value =
(char *)cfgs[ncfgs] + sizeof(struct pair) +
strlen(cfgs[ncfgs]->name) + 1;
sprintf(cfgs[ncfgs]->value, "%s/%s", dirs[di],
de->d_name);
ncfgs++;
} else {
xerrx(EXIT_FAILURE, _("internal error"));
}
}
closedir(dp);
}
qsort(cfgs, ncfgs, sizeof(struct cfg *), sortpairs);
for (i = 0; i < ncfgs; ++i) {
if (!Quiet)
printf(_("* Applying %s ...\n"), cfgs[i]->value);
rc |= Preload(setlist, cfgs[i]->value);
}
if (stat(DEFAULT_PRELOAD, &ts) == 0 && S_ISREG(ts.st_mode)) {
if (!Quiet)
printf(_("* Applying %s ...\n"), DEFAULT_PRELOAD);
rc |= Preload(setlist, DEFAULT_PRELOAD);
}
/* cleaning */
for (i = 0; i < ncfgs; ++i) {
free(cfgs[i]);
}
if (cfgs) free(cfgs);
return rc;
}
/*
* Main...
*/
int main(int argc, char *argv[])
{
bool WriteMode = false;
bool DisplayAllOpt = false;
bool preloadfileOpt = false;
int ReturnCode = 0;
int c;
int rc = 0;
const char *preloadfile = NULL;
SettingList *setlist;
enum {
DEPRECATED_OPTION = CHAR_MAX + 1,
SYSTEM_OPTION,
DRYRUN_OPTION
};
static const struct option longopts[] = {
{"all", no_argument, NULL, 'a'},
{"deprecated", no_argument, NULL, DEPRECATED_OPTION},
{"dry-run", no_argument, NULL, DRYRUN_OPTION},
{"binary", no_argument, NULL, 'b'},
{"ignore", no_argument, NULL, 'e'},
{"names", no_argument, NULL, 'N'},
{"values", no_argument, NULL, 'n'},
{"load", optional_argument, NULL, 'p'},
{"quiet", no_argument, NULL, 'q'},
{"write", no_argument, NULL, 'w'},
{"system", no_argument, NULL, SYSTEM_OPTION},
{"pattern", required_argument, NULL, 'r'},
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'V'},
{NULL, 0, NULL, 0}
};
#ifdef HAVE_PROGRAM_INVOCATION_NAME
program_invocation_name = program_invocation_short_name;
#endif
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
PrintName = true;
PrintNewline = true;
IgnoreError = false;
Quiet = false;
IgnoreDeprecated = true;
DryRun = false;
setlist = xmalloc(sizeof(SettingList));
setlist->head = NULL;
setlist->tail = NULL;
if (argc < 2)
Usage(stderr);
while ((c =
getopt_long(argc, argv, "bneNwfp::qoxaAXr:Vdh", longopts,
NULL)) != -1) {
switch (c) {
case 'b':
/* This is "binary" format, which means more for BSD. */
PrintNewline = false;
/* FALL THROUGH */
case 'n':
PrintName = false;
break;
case 'e':
/*
* For FreeBSD, -e means a "%s=%s\n" format.
* ("%s: %s\n" default). We (and NetBSD) use
* "%s = %s\n" always, and -e to ignore errors.
*/
IgnoreError = true;
break;
case 'N':
NameOnly = true;
break;
case 'w':
WriteMode = true;
break;
case 'f': /* the NetBSD way */
case 'p':
preloadfileOpt = true;
if (optarg)
preloadfile = optarg;
break;
case 'q':
Quiet = true;
break;
case 'o': /* BSD: binary values too, 1st 16 bytes in hex */
case 'x': /* BSD: binary values too, whole thing in hex */
/* does nothing */ ;
break;
case 'a': /* string and integer values (for Linux, all of them) */
case 'A': /* same as -a -o */
case 'X': /* same as -a -x */
DisplayAllOpt = true;
break;
case DEPRECATED_OPTION:
IgnoreDeprecated = false;
break;
case SYSTEM_OPTION:
IgnoreError = true;
rc |= PreloadSystem(setlist);
rc |= write_setting_list(setlist);
return rc;
case DRYRUN_OPTION:
DryRun = true;
break;
case 'r':
pattern = xstrdup(optarg);
break;
case 'V':
printf(PROCPS_NG_VERSION);
return EXIT_SUCCESS;
case 'd': /* BSD: print description ("vm.kvm_size: Size of KVM") */
case 'h': /* BSD: human-readable (did FreeBSD 5 make -e default?) */
case '?':
Usage(stdout);
default:
Usage(stderr);
}
}
argc -= optind;
argv += optind;
iobuf = xmalloc(iolen);
if (DisplayAllOpt)
return DisplayAll(PROC_PATH);
if (preloadfileOpt) {
int ret = EXIT_SUCCESS, i;
if (!preloadfile) {
if (!argc) {
ret |= Preload(setlist, DEFAULT_PRELOAD);
}
} else {
/* This happens when -pfile option is
* used without space. */
ret |= Preload(setlist, preloadfile);
}
for (i = 0; i < argc; i++)
ret |= Preload(setlist, argv[i]);
ret |= write_setting_list(setlist);
return ret;
}
if (argc < 1)
xerrx(EXIT_FAILURE, _("no variables specified\n"
"Try `%s --help' for more information."),
program_invocation_short_name);
if (NameOnly && Quiet)
xerrx(EXIT_FAILURE, _("options -N and -q cannot coexist\n"
"Try `%s --help' for more information."),
program_invocation_short_name);
for ( ; *argv; argv++) {
if (WriteMode || strchr(*argv, '=')) {
SysctlSetting *s;
if ( (s = parse_setting_line("command line", 0, *argv)) != NULL)
ReturnCode |= WriteSetting(s->key, s->path, s->value,
s->ignore_failure);
else
ReturnCode |= EXIT_FAILURE;
} else
ReturnCode += ReadSetting(*argv);
}
return ReturnCode;
}
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