source: MondoRescue/branches/stable/mindi-busybox/networking/udhcp/script.c @ 1770

Last change on this file since 1770 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)

File size: 5.7 KB
Line 
1/* vi: set sw=4 ts=4: */
2/* script.c
3 *
4 * Functions to call the DHCP client notification scripts
5 *
6 * Russ Dill <Russ.Dill@asu.edu> July 2001
7 *
8 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
9 */
10
11#include "common.h"
12#include "dhcpc.h"
13#include "options.h"
14
15
16/* get a rough idea of how long an option will be (rounding up...) */
17static const uint8_t max_option_length[] = {
18    [OPTION_IP] =       sizeof("255.255.255.255 "),
19    [OPTION_IP_PAIR] =  sizeof("255.255.255.255 ") * 2,
20    [OPTION_STRING] =   1,
21#if ENABLE_FEATURE_RFC3397
22    [OPTION_STR1035] =  1,
23#endif
24    [OPTION_BOOLEAN] =  sizeof("yes "),
25    [OPTION_U8] =       sizeof("255 "),
26    [OPTION_U16] =      sizeof("65535 "),
27    [OPTION_S16] =      sizeof("-32768 "),
28    [OPTION_U32] =      sizeof("4294967295 "),
29    [OPTION_S32] =      sizeof("-2147483684 "),
30};
31
32
33static inline int upper_length(int length, int opt_index)
34{
35    return max_option_length[opt_index] *
36        (length / option_lengths[opt_index]);
37}
38
39
40static int sprintip(char *dest, const char *pre, const uint8_t *ip)
41{
42    return sprintf(dest, "%s%d.%d.%d.%d", pre, ip[0], ip[1], ip[2], ip[3]);
43}
44
45
46/* really simple implementation, just count the bits */
47static int mton(struct in_addr *mask)
48{
49    int i;
50    unsigned long bits = ntohl(mask->s_addr);
51    /* too bad one can't check the carry bit, etc in c bit
52     * shifting */
53    for (i = 0; i < 32 && !((bits >> i) & 1); i++);
54    return 32 - i;
55}
56
57
58/* Allocate and fill with the text of option 'option'. */
59static char *alloc_fill_opts(uint8_t *option, const struct dhcp_option *type_p)
60{
61    int len, type, optlen;
62    uint16_t val_u16;
63    int16_t val_s16;
64    uint32_t val_u32;
65    int32_t val_s32;
66    char *dest, *ret;
67
68    len = option[OPT_LEN - 2];
69    type = type_p->flags & TYPE_MASK;
70    optlen = option_lengths[type];
71
72    dest = ret = xmalloc(upper_length(len, type) + strlen(type_p->name) + 2);
73    dest += sprintf(ret, "%s=", type_p->name);
74
75    for (;;) {
76        switch (type) {
77        case OPTION_IP_PAIR:
78            dest += sprintip(dest, "", option);
79            *dest++ = '/';
80            option += 4;
81            optlen = 4;
82        case OPTION_IP: /* Works regardless of host byte order. */
83            dest += sprintip(dest, "", option);
84            break;
85        case OPTION_BOOLEAN:
86            dest += sprintf(dest, *option ? "yes" : "no");
87            break;
88        case OPTION_U8:
89            dest += sprintf(dest, "%u", *option);
90            break;
91        case OPTION_U16:
92            memcpy(&val_u16, option, 2);
93            dest += sprintf(dest, "%u", ntohs(val_u16));
94            break;
95        case OPTION_S16:
96            memcpy(&val_s16, option, 2);
97            dest += sprintf(dest, "%d", ntohs(val_s16));
98            break;
99        case OPTION_U32:
100            memcpy(&val_u32, option, 4);
101            dest += sprintf(dest, "%lu", (unsigned long) ntohl(val_u32));
102            break;
103        case OPTION_S32:
104            memcpy(&val_s32, option, 4);
105            dest += sprintf(dest, "%ld", (long) ntohl(val_s32));
106            break;
107        case OPTION_STRING:
108            memcpy(dest, option, len);
109            dest[len] = '\0';
110            return ret;  /* Short circuit this case */
111#if ENABLE_FEATURE_RFC3397
112        case OPTION_STR1035:
113            /* unpack option into dest; use ret for prefix (i.e., "optname=") */
114            dest = dname_dec(option, len, ret);
115            free(ret);
116            return dest;
117#endif
118        }
119        option += optlen;
120        len -= optlen;
121        if (len <= 0) break;
122        dest += sprintf(dest, " ");
123    }
124    return ret;
125}
126
127
128/* put all the parameters into an environment */
129static char **fill_envp(struct dhcpMessage *packet)
130{
131    int num_options = 0;
132    int i, j;
133    char **envp;
134    char *var;
135    uint8_t *temp;
136    struct in_addr subnet;
137    char over = 0;
138
139    if (packet) {
140        for (i = 0; dhcp_options[i].code; i++) {
141            if (get_option(packet, dhcp_options[i].code)) {
142                num_options++;
143                if (dhcp_options[i].code == DHCP_SUBNET)
144                    num_options++; /* for mton */
145            }
146        }
147        if (packet->siaddr)
148            num_options++;
149        temp = get_option(packet, DHCP_OPTION_OVER);
150        if (temp)
151            over = *temp;
152        if (!(over & FILE_FIELD) && packet->file[0])
153            num_options++;
154        if (!(over & SNAME_FIELD) && packet->sname[0])
155            num_options++;
156    }
157
158    envp = xzalloc(sizeof(char *) * (num_options + 5));
159    j = 0;
160    envp[j++] = xasprintf("interface=%s", client_config.interface);
161    var = getenv("PATH");
162    if (var)
163        envp[j++] = xasprintf("PATH=%s", var);
164    var = getenv("HOME");
165    if (var)
166        envp[j++] = xasprintf("HOME=%s", var);
167
168    if (packet == NULL)
169        return envp;
170
171    envp[j] = xmalloc(sizeof("ip=255.255.255.255"));
172    sprintip(envp[j++], "ip=", (uint8_t *) &packet->yiaddr);
173
174    for (i = 0; dhcp_options[i].code; i++) {
175        temp = get_option(packet, dhcp_options[i].code);
176        if (!temp)
177            continue;
178        envp[j++] = alloc_fill_opts(temp, &dhcp_options[i]);
179
180        /* Fill in a subnet bits option for things like /24 */
181        if (dhcp_options[i].code == DHCP_SUBNET) {
182            memcpy(&subnet, temp, 4);
183            envp[j++] = xasprintf("mask=%d", mton(&subnet));
184        }
185    }
186    if (packet->siaddr) {
187        envp[j] = xmalloc(sizeof("siaddr=255.255.255.255"));
188        sprintip(envp[j++], "siaddr=", (uint8_t *) &packet->siaddr);
189    }
190    if (!(over & FILE_FIELD) && packet->file[0]) {
191        /* watch out for invalid packets */
192        packet->file[sizeof(packet->file) - 1] = '\0';
193        envp[j++] = xasprintf("boot_file=%s", packet->file);
194    }
195    if (!(over & SNAME_FIELD) && packet->sname[0]) {
196        /* watch out for invalid packets */
197        packet->sname[sizeof(packet->sname) - 1] = '\0';
198        envp[j++] = xasprintf("sname=%s", packet->sname);
199    }
200    return envp;
201}
202
203
204/* Call a script with a par file and env vars */
205void udhcp_run_script(struct dhcpMessage *packet, const char *name)
206{
207    int pid;
208    char **envp, **curr;
209
210    if (client_config.script == NULL)
211        return;
212
213    DEBUG("vfork'ing and execle'ing %s", client_config.script);
214
215    envp = fill_envp(packet);
216
217    /* call script */
218// can we use wait4pid(spawn(...)) here?
219    pid = vfork();
220    if (pid < 0) return;
221    if (pid == 0) {
222        /* close fd's? */
223        /* exec script */
224        execle(client_config.script, client_config.script,
225               name, NULL, envp);
226        bb_perror_msg_and_die("script %s failed", client_config.script);
227    }
228    waitpid(pid, NULL, 0);
229    for (curr = envp; *curr; curr++)
230        free(*curr);
231    free(envp);
232}
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