mirror of
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function old new delta procps_scan 1265 1298 +33 aliascmd 278 283 +5 parse_file_cmd 116 120 +4 dname_enc 373 377 +4 setcmd 90 93 +3 execcmd 57 60 +3 count_lines 72 74 +2 process_command_subs 340 339 -1 test_main 409 407 -2 mknod_main 179 177 -2 handle_incoming_and_exit 2653 2651 -2 argstr 1312 1310 -2 shiftcmd 131 128 -3 exitcmd 46 43 -3 dotcmd 297 294 -3 breakcmd 86 83 -3 evalpipe 353 349 -4 evalcommand 1180 1176 -4 evalcmd 109 105 -4 send_tree 374 369 -5 mkfifo_main 82 77 -5 evalsubshell 152 147 -5 typecmd 75 69 -6 letcmd 61 55 -6 add_cmd 1190 1183 -7 main 891 883 -8 ash_main 1415 1407 -8 parse_stream 1377 1367 -10 alloc_procps_scan 55 - -55 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 7/21 up/down: 54/-148) Total: -94 bytes text data bss dec hex filename 797195 658 7428 805281 c49a1 busybox_old 797101 658 7428 805187 c4943 busybox_unstripped
295 lines
6.7 KiB
C
295 lines
6.7 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Sysctl 1.01 - A utility to read and manipulate the sysctl parameters
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*
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* Copyright 1999 George Staikos
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*
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* Changelog:
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* v1.01:
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* - added -p <preload> to preload values from a file
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* v1.01.1
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* - busybox applet aware by <solar@gentoo.org>
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*
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*/
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#include "libbb.h"
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static int sysctl_read_setting(const char *setting);
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static int sysctl_write_setting(const char *setting);
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static int sysctl_display_all(const char *path);
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static int sysctl_preload_file_and_exit(const char *filename);
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static const char ETC_SYSCTL_CONF[] ALIGN1 = "/etc/sysctl.conf";
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static const char PROC_SYS[] ALIGN1 = "/proc/sys/";
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enum { strlen_PROC_SYS = sizeof(PROC_SYS) - 1 };
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/* error messages */
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static const char ERR_MALFORMED_SETTING[] ALIGN1 =
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"error: malformed setting '%s'";
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static const char ERR_NO_EQUALS[] ALIGN1 =
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"error: '%s' must be of the form name=value";
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static const char ERR_INVALID_KEY[] ALIGN1 =
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"error: '%s' is an unknown key";
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static const char ERR_UNKNOWN_WRITING[] ALIGN1 =
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"error setting key '%s'";
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static const char ERR_UNKNOWN_READING[] ALIGN1 =
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"error reading key '%s'";
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static const char ERR_PERMISSION_DENIED[] ALIGN1 =
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"error: permission denied on key '%s'";
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static const char WARN_BAD_LINE[] ALIGN1 =
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"warning: %s(%d): invalid syntax, continuing";
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static void dwrite_str(int fd, const char *buf)
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{
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write(fd, buf, strlen(buf));
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}
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enum {
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FLAG_SHOW_KEYS = 1 << 0,
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FLAG_SHOW_KEY_ERRORS = 1 << 1,
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FLAG_TABLE_FORMAT = 1 << 2, /* not implemented */
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FLAG_SHOW_ALL = 1 << 3,
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FLAG_PRELOAD_FILE = 1 << 4,
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FLAG_WRITE = 1 << 5,
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};
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int sysctl_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int sysctl_main(int argc ATTRIBUTE_UNUSED, char **argv)
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{
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int retval;
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int opt;
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opt = getopt32(argv, "+neAapw"); /* '+' - stop on first non-option */
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argv += optind;
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opt ^= (FLAG_SHOW_KEYS | FLAG_SHOW_KEY_ERRORS);
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option_mask32 ^= (FLAG_SHOW_KEYS | FLAG_SHOW_KEY_ERRORS);
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if (opt & (FLAG_TABLE_FORMAT | FLAG_SHOW_ALL))
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return sysctl_display_all(PROC_SYS);
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if (opt & FLAG_PRELOAD_FILE)
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return sysctl_preload_file_and_exit(*argv ? *argv : ETC_SYSCTL_CONF);
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retval = 0;
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while (*argv) {
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if (opt & FLAG_WRITE)
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retval |= sysctl_write_setting(*argv);
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else
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retval |= sysctl_read_setting(*argv);
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argv++;
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}
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return retval;
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} /* end sysctl_main() */
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/*
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* preload the sysctl's from a conf file
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* - we parse the file and then reform it (strip out whitespace)
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*/
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#define PRELOAD_BUF 256
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static int sysctl_preload_file_and_exit(const char *filename)
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{
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int lineno;
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char oneline[PRELOAD_BUF];
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char buffer[PRELOAD_BUF];
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char *name, *value;
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FILE *fp;
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fp = xfopen(filename, "r");
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lineno = 0;
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while (fgets(oneline, sizeof(oneline) - 1, fp)) {
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lineno++;
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trim(oneline);
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if (oneline[0] == '#' || oneline[0] == ';')
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continue;
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if (!oneline[0] || !oneline[1])
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continue;
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name = strtok(oneline, "=");
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if (!name) {
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bb_error_msg(WARN_BAD_LINE, filename, lineno);
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continue;
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}
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trim(name);
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if (!*name) {
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bb_error_msg(WARN_BAD_LINE, filename, lineno);
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continue;
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}
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value = strtok(NULL, "\n\r");
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if (!value) {
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bb_error_msg(WARN_BAD_LINE, filename, lineno);
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continue;
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}
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while (*value == ' ' || *value == '\t')
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value++;
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if (!*value) {
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bb_error_msg(WARN_BAD_LINE, filename, lineno);
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continue;
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}
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/* safe because sizeof(oneline) == sizeof(buffer) */
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sprintf(buffer, "%s=%s", name, value);
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sysctl_write_setting(buffer);
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}
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if (ENABLE_FEATURE_CLEAN_UP)
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fclose(fp);
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return 0;
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} /* end sysctl_preload_file_and_exit() */
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/*
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* Write a single sysctl setting
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*/
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static int sysctl_write_setting(const char *setting)
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{
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int retval;
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const char *name;
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const char *value;
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const char *equals;
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char *tmpname, *outname, *cptr;
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int fd;
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name = setting;
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equals = strchr(setting, '=');
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if (!equals) {
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bb_error_msg(ERR_NO_EQUALS, setting);
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return EXIT_FAILURE;
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}
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value = equals + 1; /* point to the value in name=value */
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if (name == equals || !*value) {
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bb_error_msg(ERR_MALFORMED_SETTING, setting);
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return EXIT_FAILURE;
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}
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tmpname = xasprintf("%s%.*s", PROC_SYS, (int)(equals - name), name);
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outname = xstrdup(tmpname + strlen_PROC_SYS);
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while ((cptr = strchr(tmpname, '.')) != NULL)
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*cptr = '/';
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while ((cptr = strchr(outname, '/')) != NULL)
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*cptr = '.';
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fd = open(tmpname, O_WRONLY | O_CREAT | O_TRUNC, 0666);
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if (fd < 0) {
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switch (errno) {
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case ENOENT:
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if (option_mask32 & FLAG_SHOW_KEY_ERRORS)
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bb_error_msg(ERR_INVALID_KEY, outname);
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break;
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case EACCES:
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bb_perror_msg(ERR_PERMISSION_DENIED, outname);
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break;
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default:
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bb_perror_msg(ERR_UNKNOWN_WRITING, outname);
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break;
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}
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retval = EXIT_FAILURE;
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} else {
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dwrite_str(fd, value);
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close(fd);
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if (option_mask32 & FLAG_SHOW_KEYS) {
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printf("%s = ", outname);
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}
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puts(value);
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retval = EXIT_SUCCESS;
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}
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free(tmpname);
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free(outname);
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return retval;
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} /* end sysctl_write_setting() */
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/*
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* Read a sysctl setting
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*/
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static int sysctl_read_setting(const char *name)
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{
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int retval;
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char *tmpname, *outname, *cptr;
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char inbuf[1025];
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FILE *fp;
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if (!*name) {
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if (option_mask32 & FLAG_SHOW_KEY_ERRORS)
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bb_error_msg(ERR_INVALID_KEY, name);
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return -1;
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}
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tmpname = concat_path_file(PROC_SYS, name);
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outname = xstrdup(tmpname + strlen_PROC_SYS);
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while ((cptr = strchr(tmpname, '.')) != NULL)
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*cptr = '/';
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while ((cptr = strchr(outname, '/')) != NULL)
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*cptr = '.';
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fp = fopen(tmpname, "r");
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if (fp == NULL) {
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switch (errno) {
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case ENOENT:
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if (option_mask32 & FLAG_SHOW_KEY_ERRORS)
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bb_error_msg(ERR_INVALID_KEY, outname);
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break;
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case EACCES:
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bb_error_msg(ERR_PERMISSION_DENIED, outname);
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break;
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default:
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bb_perror_msg(ERR_UNKNOWN_READING, outname);
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break;
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}
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retval = EXIT_FAILURE;
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} else {
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while (fgets(inbuf, sizeof(inbuf) - 1, fp)) {
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if (option_mask32 & FLAG_SHOW_KEYS) {
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printf("%s = ", outname);
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}
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fputs(inbuf, stdout);
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}
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fclose(fp);
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retval = EXIT_SUCCESS;
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}
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free(tmpname);
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free(outname);
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return retval;
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} /* end sysctl_read_setting() */
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/*
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* Display all the sysctl settings
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*/
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static int sysctl_display_all(const char *path)
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{
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int retval = 0;
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DIR *dp;
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struct dirent *de;
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char *tmpdir;
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struct stat ts;
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dp = opendir(path);
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if (!dp) {
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return EXIT_FAILURE;
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}
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while ((de = readdir(dp)) != NULL) {
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tmpdir = concat_subpath_file(path, de->d_name);
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if (tmpdir == NULL)
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continue; /* . or .. */
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if (stat(tmpdir, &ts) != 0) {
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bb_perror_msg(tmpdir);
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} else if (S_ISDIR(ts.st_mode)) {
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retval |= sysctl_display_all(tmpdir);
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} else {
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retval |= sysctl_read_setting(tmpdir + strlen_PROC_SYS);
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}
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free(tmpdir);
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} /* end while */
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closedir(dp);
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return retval;
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} /* end sysctl_display_all() */
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