source: branches/stable/mindi-busybox/procps/sysctl.c @ 1770

Last change on this file since 1770 was 1770, checked in by Bruno Cornec, 13 years ago
  • Better output for mindi-busybox revision
  • Remove dummy file created on NFS - report from Arnaud Tiger <arnaud.tiger_at_hp.com>
  • strace useful for debug
  • fix new versions for pb (2.0.0 for mindi and 1.7.2 for mindi-busybox)
  • fix build process for mindi-busybox + options used in that version (dd for label-partitions-as-necessary)
  • fix typo in label-partitions-as-necessary which doesn't seem to work
  • Update to busybox 1.7.2
  • perl is now required at restore time to support uuid swap partitions (and will be used for many other thigs

in the future for sure)

  • next mindi version will be 2.0.0 due to all the changes made in it (udev may break working distros)
  • small optimization in mindi on keyboard handling (one single find instead of multiple)
  • better interaction for USB device when launching mindi manually
  • attempt to automatically guess block disk size for ramdisk
  • fix typos in bkphw
  • Fix the remaining problem with UUID support for swap partitions
  • Updates mondoarchive man page for USB support
  • Adds preliminary Hardware support to mindi (Proliant SSSTK)
  • Tries to add udev support also for rhel4
  • Fix UUID support which was still broken.
  • Be conservative in test for the start-nfs script
  • Update config file for mindi-busybox for 1.7.2 migration
  • Try to run around a busybox bug (1.2.2 pb on inexistant links)
  • Add build content for mindi-busybox in pb
  • Remove distributions content for mindi-busybox
  • Fix a warning on inexistant raidtab
  • Solve problem on tmpfs in restore init (Problem of inexistant symlink and busybox)
  • Create MONDO_CACHE and use it everywhere + creation at start
  • Really never try to eject a USB device
  • Fix a issue with &> usage (replaced with 1> and 2>)
  • Adds magic file to depllist in order to have file working + ldd which helps for debugging issues
  • tty modes correct to avoid sh error messages
  • Use ext3 normally and not ext2 instead
  • USB device should be corrected after reading (take 1st part)
  • Adds a mount_USB_here function derived from mount_CDROM_here
  • usb detection place before /dev detection in device name at restore time
  • Fix when restoring from USB: media is asked in interactive mode
  • Adds USB support for mondorestore
  • mount_cdrom => mount_media
  • elilo.efi is now searched throughout /boot/efi and not in a fixed place as there is no standard
  • untar-and-softlink => untar (+ interface change)
  • suppress useless softlinks creation/removal in boot process
  • avoids udevd messages on groups
  • Increase # of disks to 99 as in mindi at restore time (should be a conf file parameter)
  • skip existing big file creation
  • seems to work correctly for USB mindi boot
  • Adds group and tty link to udev conf
  • Always load usb-torage (even 2.6) to initiate USB bus discovery
  • Better printing of messages
  • Attempt to fix a bug in supporting OpenSusE 10.3 kernel for initramfs (mindi may now use multiple regex for kernel initrd detection)
  • Links were not correctly done as non relative for modules in mindi
  • exclusion of modules denied now works
  • Also create modules in their ordinary place, so that classical modprobe works + copy modules.dep
  • Fix bugs for DENY_MODS handling
  • Add device /dev/console for udev
  • ide-generic should now really be excluded
  • Fix a bug in major number for tty
  • If udev then adds modprobe/insmod to rootfs
  • tty0 is also cretaed with udev
  • ide-generic put rather in DENY_MODS
  • udevd remove from deplist s handled in mindi directly
  • better default for mindi when using --usb
  • Handles dynamically linked busybox (in case we want to use it soon ;-)
  • Adds fixed devices to create for udev
  • ide-generic should not be part of the initrd when using libata v2
  • support a dynamically linked udev (case on Ubuntu 7.10 and Mandriva 2008.0 so should be quite generic) This will give incitation to move to dyn. linked binaries in the initrd which will help for other tasks (ia6 4)
  • Improvement in udev support (do not use cl options not available in busybox)
  • Udev in mindi
    • auto creation of the right links at boot time with udev-links.conf(from Mandriva 2008.0)
    • rework startup of udev as current makes kernel crash (from Mandriva 2008.0)
    • add support for 64 bits udev
  • Try to render MyInsmod? silent at boot time
  • Adds udev support (mandatory for newest distributions to avoid remapping of devices in a different way as on the original system)
  • We also need vaft format support for USB boot
  • Adds libusual support (Ubuntu 7.10 needs it for USB)
  • Improve Ubuntu/Debian? keyboard detection and support
  • pbinit adapted to new pb (0.8.10). Filtering of docs done in it
  • Suppress some mondo warnings and errors on USB again
  • Tries to fix lack of files in deb mindi package
  • Verify should now work for USB devices
  • More log/mesages improvement for USB support
  • - Supress g_erase_tmpdir_and_scratchdir
  • Improve some log messages for USB support
  • Try to improve install in mindi to avoid issues with isolinux.cfg not installed vene if in the pkg :-(
  • Improve mindi-busybox build
  • In conformity with pb 0.8.9
  • Add support for Ubuntu 7.10 in build process
  • Add USB Key button to Menu UI (CD streamer removed)
  • Attempt to fix error messages on tmp/scratch files at the end by removing those dir at the latest possible.
  • Fix a bug linked to the size of the -E param which could be used (Arnaud Tiger/René? Ribaud).
  • Integrate ~/.pbrc content into mondorescue.pb (required project-builder >= 0.8.7)
  • Put mondorescue in conformity with new pb filtering rules
  • Add USB support at restore time (no test done yet). New start-usb script PB varibale added where useful
  • Unmounting USB device before removal of temporary scratchdir
  • Stil refining USB copy back to mondo (one command was not executed)
  • No need to have the image subdor in the csratchdir when USB.
  • umount the USB partition before attempting to use it
  • Remove useless copy from mindi to mondo at end of USB handling

(risky merge, we are raising the limits of 2 diverging branches. The status of stable is not completely sure as such. Will need lots of tests, but it's not yet done :-()
(merge -r1692:1769 $SVN_M/branches/2.2.5)

File size: 7.3 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Sysctl 1.01 - A utility to read and manipulate the sysctl parameters
4 *
5 * Copyright 1999 George Staikos
6 *
7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
8 *
9 * Changelog:
10 *  v1.01:
11 *      - added -p <preload> to preload values from a file
12 *  v1.01.1
13 *      - busybox applet aware by <solar@gentoo.org>
14 *
15 */
16
17#include "libbb.h"
18
19/*
20 *    Function Prototypes
21 */
22static int sysctl_read_setting(const char *setting, int output);
23static int sysctl_write_setting(const char *setting, int output);
24static int sysctl_preload_file(const char *filename, int output);
25static int sysctl_display_all(const char *path, int output, int show_table);
26
27/*
28 *    Globals...
29 */
30static const char PROC_PATH[] ALIGN1 = "/proc/sys/";
31static const char DEFAULT_PRELOAD[] ALIGN1 = "/etc/sysctl.conf";
32
33/* error messages */
34static const char ERR_UNKNOWN_PARAMETER[] ALIGN1 =
35    "error: Unknown parameter '%s'\n";
36static const char ERR_MALFORMED_SETTING[] ALIGN1 =
37    "error: Malformed setting '%s'\n";
38static const char ERR_NO_EQUALS[] ALIGN1 =
39    "error: '%s' must be of the form name=value\n";
40static const char ERR_INVALID_KEY[] ALIGN1 =
41    "error: '%s' is an unknown key\n";
42static const char ERR_UNKNOWN_WRITING[] ALIGN1 =
43    "error: unknown error %d setting key '%s'\n";
44static const char ERR_UNKNOWN_READING[] ALIGN1 =
45    "error: unknown error %d reading key '%s'\n";
46static const char ERR_PERMISSION_DENIED[] ALIGN1 =
47    "error: permission denied on key '%s'\n";
48static const char ERR_PRELOAD_FILE[] ALIGN1 =
49    "error: cannot open preload file '%s'\n";
50static const char WARN_BAD_LINE[] ALIGN1 =
51    "warning: %s(%d): invalid syntax, continuing...\n";
52
53
54static void dwrite_str(int fd, const char *buf)
55{
56    write(fd, buf, strlen(buf));
57}
58
59/*
60 *    sysctl_main()...
61 */
62int sysctl_main(int argc, char **argv);
63int sysctl_main(int argc, char **argv)
64{
65    int retval = 0;
66    int output = 1;
67    int write_mode = 0;
68    int switches_allowed = 1;
69
70    if (argc < 2)
71        bb_show_usage();
72
73    argv++;
74
75    for (; argv && *argv && **argv; argv++) {
76        if (switches_allowed && **argv == '-') {    /* we have a switch */
77            switch ((*argv)[1]) {
78            case 'n':
79                output = 0;
80                break;
81            case 'w':
82                write_mode = 1;
83                switches_allowed = 0;
84                break;
85            case 'p':
86                argv++;
87                return
88                    sysctl_preload_file(((argv && *argv
89                                          && **argv) ? *argv :
90                                         DEFAULT_PRELOAD), output);
91            case 'a':
92            case 'A':
93                switches_allowed = 0;
94                return sysctl_display_all(PROC_PATH, output,
95                                          ((*argv)[1] == 'a') ? 0 : 1);
96            case 'h':
97            case '?':
98                bb_show_usage();
99            default:
100                bb_error_msg(ERR_UNKNOWN_PARAMETER, *argv);
101                bb_show_usage();
102            }
103        } else {
104            switches_allowed = 0;
105            if (write_mode)
106                retval = sysctl_write_setting(*argv, output);
107            else
108                sysctl_read_setting(*argv, output);
109        }
110    }
111    return retval;
112}                       /* end sysctl_main() */
113
114
115
116/*
117 *     sysctl_preload_file
118 *  preload the sysctl's from a conf file
119 *           - we parse the file and then reform it (strip out whitespace)
120 */
121#define PRELOAD_BUF 256
122
123int sysctl_preload_file(const char *filename, int output)
124{
125    int lineno = 0;
126    char oneline[PRELOAD_BUF];
127    char buffer[PRELOAD_BUF];
128    char *name, *value, *ptr;
129    FILE *fp = NULL;
130
131    if (!filename || ((fp = fopen(filename, "r")) == NULL)) {
132        bb_error_msg_and_die(ERR_PRELOAD_FILE, filename);
133    }
134
135    while (fgets(oneline, sizeof(oneline) - 1, fp)) {
136        oneline[sizeof(oneline) - 1] = '\0';
137        lineno++;
138        trim(oneline);
139        ptr = (char *) oneline;
140
141        if (*ptr == '#' || *ptr == ';')
142            continue;
143
144        if (strlen(ptr) < 2)
145            continue;
146
147        name = strtok(ptr, "=");
148        if (!name || !*name) {
149            bb_error_msg(WARN_BAD_LINE, filename, lineno);
150            continue;
151        }
152
153        trim(name);
154
155        value = strtok(NULL, "\n\r");
156        if (!value || !*value) {
157            bb_error_msg(WARN_BAD_LINE, filename, lineno);
158            continue;
159        }
160
161        while ((*value == ' ' || *value == '\t') && *value != 0)
162            value++;
163        /* safe because sizeof(oneline) == sizeof(buffer) */
164        sprintf(buffer, "%s=%s", name, value);
165        sysctl_write_setting(buffer, output);
166    }
167    fclose(fp);
168    return 0;
169}                       /* end sysctl_preload_file() */
170
171
172/*
173 *     Write a single sysctl setting
174 */
175int sysctl_write_setting(const char *setting, int output)
176{
177    int retval = 0;
178    const char *name = setting;
179    const char *value;
180    const char *equals;
181    char *tmpname, *outname, *cptr;
182    int fd = -1;
183
184    if (!name)          /* probably dont' want to display this  err */
185        return 0;
186
187    if (!(equals = strchr(setting, '='))) {
188        bb_error_msg(ERR_NO_EQUALS, setting);
189        return -1;
190    }
191
192    value = equals + sizeof(char);  /* point to the value in name=value */
193
194    if (!*name || !*value || name == equals) {
195        bb_error_msg(ERR_MALFORMED_SETTING, setting);
196        return -2;
197    }
198
199    tmpname = xasprintf("%s%.*s", PROC_PATH, (int)(equals - name), name);
200    outname = xstrdup(tmpname + strlen(PROC_PATH));
201
202    while ((cptr = strchr(tmpname, '.')) != NULL)
203        *cptr = '/';
204
205    while ((cptr = strchr(outname, '/')) != NULL)
206        *cptr = '.';
207
208    fd = open(tmpname, O_WRONLY | O_CREAT | O_TRUNC, 0666);
209    if (fd < 0) {
210        switch (errno) {
211        case ENOENT:
212            bb_error_msg(ERR_INVALID_KEY, outname);
213            break;
214        case EACCES:
215            bb_perror_msg(ERR_PERMISSION_DENIED, outname);
216            break;
217        default:
218            bb_error_msg(ERR_UNKNOWN_WRITING, errno, outname);
219            break;
220        }
221        retval = -1;
222    } else {
223        dwrite_str(fd, value);
224        close(fd);
225        if (output) {
226            dwrite_str(STDOUT_FILENO, outname);
227            dwrite_str(STDOUT_FILENO, " = ");
228        }
229        dwrite_str(STDOUT_FILENO, value);
230        dwrite_str(STDOUT_FILENO, "\n");
231    }
232
233    /* cleanup */
234    free(tmpname);
235    free(outname);
236    return retval;
237}                       /* end sysctl_write_setting() */
238
239
240/*
241 *     Read a sysctl setting
242 *
243 */
244int sysctl_read_setting(const char *setting, int output)
245{
246    int retval = 0;
247    char *tmpname, *outname, *cptr;
248    char inbuf[1025];
249    const char *name = setting;
250    FILE *fp;
251
252    if (!setting || !*setting)
253        bb_error_msg(ERR_INVALID_KEY, setting);
254
255    tmpname = concat_path_file(PROC_PATH, name);
256    outname = xstrdup(tmpname + strlen(PROC_PATH));
257
258    while ((cptr = strchr(tmpname, '.')) != NULL)
259        *cptr = '/';
260    while ((cptr = strchr(outname, '/')) != NULL)
261        *cptr = '.';
262
263    if ((fp = fopen(tmpname, "r")) == NULL) {
264        switch (errno) {
265        case ENOENT:
266            bb_error_msg(ERR_INVALID_KEY, outname);
267            break;
268        case EACCES:
269            bb_error_msg(ERR_PERMISSION_DENIED, outname);
270            break;
271        default:
272            bb_error_msg(ERR_UNKNOWN_READING, errno, outname);
273            break;
274        }
275        retval = -1;
276    } else {
277        while (fgets(inbuf, sizeof(inbuf) - 1, fp)) {
278            if (output) {
279                dwrite_str(STDOUT_FILENO, outname);
280                dwrite_str(STDOUT_FILENO, " = ");
281            }
282            dwrite_str(STDOUT_FILENO, inbuf);
283        }
284        fclose(fp);
285    }
286
287    free(tmpname);
288    free(outname);
289    return retval;
290}                       /* end sysctl_read_setting() */
291
292
293
294/*
295 *     Display all the sysctl settings
296 *
297 */
298int sysctl_display_all(const char *path, int output, int show_table)
299{
300    int retval = 0;
301    int retval2;
302    DIR *dp;
303    struct dirent *de;
304    char *tmpdir;
305    struct stat ts;
306
307    dp = opendir(path);
308    if (!dp) {
309        retval = -1;
310    } else {
311        while ((de = readdir(dp)) != NULL) {
312            tmpdir = concat_subpath_file(path, de->d_name);
313            if (tmpdir == NULL)
314                continue;
315            retval2 = stat(tmpdir, &ts);
316            if (retval2 != 0)
317                bb_perror_msg(tmpdir);
318            else {
319                if (S_ISDIR(ts.st_mode)) {
320                    sysctl_display_all(tmpdir, output, show_table);
321                } else
322                    retval |=
323                        sysctl_read_setting(tmpdir + strlen(PROC_PATH),
324                                            output);
325
326            }
327            free(tmpdir);
328        }               /* end while */
329        closedir(dp);
330    }
331
332    return retval;
333}                       /* end sysctl_display_all() */
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