source: MondoRescue/branches/stable/mindi-busybox/networking/slattach.c

Last change on this file was 1770, checked in by Bruno Cornec, 12 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)

  • Property svn:eol-style set to native
File size: 5.3 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Stripped down version of net-tools for busybox.
4 *
5 * Author: Ignacio Garcia Perez (iggarpe at gmail dot com)
6 *
7 * License: GPLv2 or later, see LICENSE file in this tarball.
8 *
9 * There are some differences from the standard net-tools slattach:
10 *
11 * - The -l option is not supported.
12 *
13 * - The -F options allows disabling of RTS/CTS flow control.
14 */
15
16#include "libbb.h"
17#include "libiproute/utils.h" /* invarg() */
18
19struct globals {
20    int handle;
21    int saved_disc;
22    struct termios saved_state;
23};
24#define G (*(struct globals*)&bb_common_bufsiz1)
25#define handle       (G.handle      )
26#define saved_disc   (G.saved_disc  )
27#define saved_state  (G.saved_state )
28#define INIT_G() do {} while (0)
29
30
31/*
32 * Save tty state and line discipline
33 *
34 * It is fine here to bail out on errors, since we haven modified anything yet
35 */
36static void save_state(void)
37{
38    /* Save line status */
39    if (tcgetattr(handle, &saved_state) < 0)
40        bb_perror_msg_and_die("get state");
41
42    /* Save line discipline */
43    xioctl(handle, TIOCGETD, &saved_disc);
44}
45
46static int set_termios_state_and_warn(struct termios *state)
47{
48    int ret;
49
50    ret = tcsetattr(handle, TCSANOW, state);
51    if (ret < 0) {
52        bb_perror_msg("set state");
53        return 1; /* used as exitcode */
54    }
55    return 0;
56}
57
58/*
59 * Restore state and line discipline for ALL managed ttys
60 *
61 * Restoring ALL managed ttys is the only way to have a single
62 * hangup delay.
63 *
64 * Go on after errors: we want to restore as many controlled ttys
65 * as possible.
66 */
67static void restore_state_and_exit(int exitcode) ATTRIBUTE_NORETURN;
68static void restore_state_and_exit(int exitcode)
69{
70    struct termios state;
71
72    /* Restore line discipline */
73    if (ioctl_or_warn(handle, TIOCSETD, &saved_disc) < 0) {
74        exitcode = 1;
75    }
76
77    /* Hangup */
78    memcpy(&state, &saved_state, sizeof(state));
79    cfsetispeed(&state, B0);
80    cfsetospeed(&state, B0);
81    if (set_termios_state_and_warn(&state))
82        exitcode = 1;
83    sleep(1);
84
85    /* Restore line status */
86    if (set_termios_state_and_warn(&saved_state))
87        exit(EXIT_FAILURE);
88    if (ENABLE_FEATURE_CLEAN_UP)
89        close(handle);
90
91    exit(exitcode);
92}
93
94/*
95 * Set tty state, line discipline and encapsulation
96 */
97static void set_state(struct termios *state, int encap)
98{
99    int disc;
100
101    /* Set line status */
102    if (set_termios_state_and_warn(state))
103        goto bad;
104    /* Set line discliple (N_SLIP always) */
105    disc = N_SLIP;
106    if (ioctl_or_warn(handle, TIOCSETD, &disc) < 0) {
107        goto bad;
108    }
109
110    /* Set encapsulation (SLIP, CSLIP, etc) */
111    if (ioctl_or_warn(handle, SIOCSIFENCAP, &encap) < 0) {
112 bad:
113        restore_state_and_exit(1);
114    }
115}
116
117static void sig_handler(int signo)
118{
119    restore_state_and_exit(0);
120}
121
122int slattach_main(int argc, char **argv);
123int slattach_main(int argc, char **argv)
124{
125    /* Line discipline code table */
126    static const char proto_names[] ALIGN1 =
127        "slip\0"        /* 0 */
128        "cslip\0"       /* 1 */
129        "slip6\0"       /* 2 */
130        "cslip6\0"      /* 3 */
131        "adaptive\0"    /* 8 */
132        ;
133
134    int i, encap, opt;
135    struct termios state;
136    const char *proto = "cslip";
137    const char *extcmd;             /* Command to execute after hangup */
138    const char *baud_str;
139    int baud_code = -1;             /* Line baud rate (system code) */
140
141    enum {
142        OPT_p_proto  = 1 << 0,
143        OPT_s_baud   = 1 << 1,
144        OPT_c_extcmd = 1 << 2,
145        OPT_e_quit   = 1 << 3,
146        OPT_h_watch  = 1 << 4,
147        OPT_m_nonraw = 1 << 5,
148        OPT_L_local  = 1 << 6,
149        OPT_F_noflow = 1 << 7
150    };
151
152    INIT_G();
153
154    /* Parse command line options */
155    opt = getopt32(argv, "p:s:c:ehmLF", &proto, &baud_str, &extcmd);
156    /*argc -= optind;*/
157    argv += optind;
158
159    if (!*argv)
160        bb_show_usage();
161
162    encap = index_in_strings(proto_names, proto);
163
164    if (encap < 0)
165        invarg(proto, "protocol");
166    if (encap > 3)
167        encap = 8;
168
169    /* We want to know if the baud rate is valid before we start touching the ttys */
170    if (opt & OPT_s_baud) {
171        baud_code = tty_value_to_baud(xatoi(baud_str));
172        if (baud_code < 0)
173            invarg(baud_str, "baud rate");
174    }
175
176    /* Trap signals in order to restore tty states upon exit */
177    if (!(opt & OPT_e_quit)) {
178        signal(SIGHUP, sig_handler);
179        signal(SIGINT, sig_handler);
180        signal(SIGQUIT, sig_handler);
181        signal(SIGTERM, sig_handler);
182    }
183
184    /* Open tty */
185    handle = open(*argv, O_RDWR | O_NDELAY);
186    if (handle < 0) {
187        char *buf = concat_path_file("/dev", *argv);
188        handle = xopen(buf, O_RDWR | O_NDELAY);
189        /* maybe if (ENABLE_FEATURE_CLEAN_UP) ?? */
190        free(buf);
191    }
192
193    /* Save current tty state */
194    save_state();
195
196    /* Configure tty */
197    memcpy(&state, &saved_state, sizeof(state));
198    if (!(opt & OPT_m_nonraw)) { /* raw not suppressed */
199        memset(&state.c_cc, 0, sizeof(state.c_cc));
200        state.c_cc[VMIN] = 1;
201        state.c_iflag = IGNBRK | IGNPAR;
202        state.c_oflag = 0;
203        state.c_lflag = 0;
204        state.c_cflag = CS8 | HUPCL | CREAD
205                      | ((opt & OPT_L_local) ? CLOCAL : 0)
206                      | ((opt & OPT_F_noflow) ? 0 : CRTSCTS);
207    }
208
209    if (opt & OPT_s_baud) {
210        cfsetispeed(&state, baud_code);
211        cfsetospeed(&state, baud_code);
212    }
213
214    set_state(&state, encap);
215
216    /* Exit now if option -e was passed */
217    if (opt & OPT_e_quit)
218        return 0;
219
220    /* If we're not requested to watch, just keep descriptor open
221     * until we are killed */
222    if (!(opt & OPT_h_watch))
223        while (1)
224            sleep(24*60*60);
225
226    /* Watch line for hangup */
227    while (1) {
228        if (ioctl(handle, TIOCMGET, &i) < 0 || !(i & TIOCM_CAR))
229            goto no_carrier;
230        sleep(15);
231    }
232
233 no_carrier:
234
235    /* Execute command on hangup */
236    if (opt & OPT_c_extcmd)
237        system(extcmd);
238
239    /* Restore states and exit */
240    restore_state_and_exit(0);
241}
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