source: branches/stable/mindi-busybox/miscutils/dc.c

Last change on this file 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: 3.8 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
4 */
5
6#include "libbb.h"
7#include <math.h>
8
9/* Tiny RPN calculator, because "expr" didn't give me bitwise operations. */
10
11enum { STACK_SIZE = COMMON_BUFSIZE / sizeof(double) };
12
13#define stack ((double*)&bb_common_bufsiz1)
14static unsigned int pointer;
15static unsigned char base;
16
17static void push(double a)
18{
19    if (pointer >= STACK_SIZE)
20        bb_error_msg_and_die("stack overflow");
21    stack[pointer++] = a;
22}
23
24static double pop(void)
25{
26    if (pointer == 0)
27        bb_error_msg_and_die("stack underflow");
28    return stack[--pointer];
29}
30
31static void add(void)
32{
33    push(pop() + pop());
34}
35
36static void sub(void)
37{
38    double subtrahend = pop();
39
40    push(pop() - subtrahend);
41}
42
43static void mul(void)
44{
45    push(pop() * pop());
46}
47
48static void power(void)
49{
50    double topower = pop();
51
52    push(pow(pop(), topower));
53}
54
55static void divide(void)
56{
57    double divisor = pop();
58
59    push(pop() / divisor);
60}
61
62static void mod(void)
63{
64    unsigned int d = pop();
65
66    push((unsigned int) pop() % d);
67}
68
69static void and(void)
70{
71    push((unsigned int) pop() & (unsigned int) pop());
72}
73
74static void or(void)
75{
76    push((unsigned int) pop() | (unsigned int) pop());
77}
78
79static void eor(void)
80{
81    push((unsigned int) pop() ^ (unsigned int) pop());
82}
83
84static void not(void)
85{
86    push(~(unsigned int) pop());
87}
88
89static void set_output_base(void)
90{
91    base = (unsigned char)pop();
92    if ((base != 10) && (base != 16)) {
93        bb_error_msg("error, base %d is not supported", base);
94        base = 10;
95    }
96}
97
98static void print_base(double print)
99{
100    if (base == 16)
101        printf("%x\n", (unsigned int)print);
102    else
103        printf("%g\n", print);
104}
105
106static void print_stack_no_pop(void)
107{
108    unsigned int i = pointer;
109    while (i)
110        print_base(stack[--i]);
111}
112
113static void print_no_pop(void)
114{
115    print_base(stack[pointer-1]);
116}
117
118struct op {
119    const char name[4];
120    void (*function) (void);
121};
122
123static const struct op operators[] = {
124    {"+",   add},
125    {"add", add},
126    {"-",   sub},
127    {"sub", sub},
128    {"*",   mul},
129    {"mul", mul},
130    {"/",   divide},
131    {"div", divide},
132    {"**",  power},
133    {"exp", power},
134    {"pow", power},
135    {"%",   mod},
136    {"mod", mod},
137    {"and", and},
138    {"or",  or},
139    {"not", not},
140    {"eor", eor},
141    {"xor", eor},
142    {"p", print_no_pop},
143    {"f", print_stack_no_pop},
144    {"o", set_output_base},
145    {"", 0}
146};
147
148static void stack_machine(const char *argument)
149{
150    char *endPointer = 0;
151    double d;
152    const struct op *o = operators;
153
154    if (argument == 0)
155        return;
156
157    d = strtod(argument, &endPointer);
158
159    if (endPointer != argument) {
160        push(d);
161        return;
162    }
163
164    while (o->name[0]) {
165        if (strcmp(o->name, argument) == 0) {
166            o->function();
167            return;
168        }
169        o++;
170    }
171    bb_error_msg_and_die("%s: syntax error", argument);
172}
173
174/* return pointer to next token in buffer and set *buffer to one char
175 * past the end of the above mentioned token
176 */
177static char *get_token(char **buffer)
178{
179    char *start = NULL;
180    char *current;
181
182    current = skip_whitespace(*buffer);
183    if (*current != 0) {
184        start = current;
185        current = skip_non_whitespace(current);
186        *buffer = current;
187    }
188    return start;
189}
190
191/* In Perl one might say, scalar m|\s*(\S+)\s*|g */
192static int number_of_tokens(char *buffer)
193{
194    int   i = 0;
195    char *b = buffer;
196    while (get_token(&b)) { i++; }
197    return i;
198}
199
200int dc_main(int argc, char **argv);
201int dc_main(int argc, char **argv)
202{
203    /* take stuff from stdin if no args are given */
204    if (argc <= 1) {
205        int i, len;
206        char *line   = NULL;
207        char *cursor = NULL;
208        char *token  = NULL;
209        while ((line = xmalloc_getline(stdin))) {
210            cursor = line;
211            len = number_of_tokens(line);
212            for (i = 0; i < len; i++) {
213                token = get_token(&cursor);
214                *cursor++ = 0;
215                stack_machine(token);
216            }
217            free(line);
218        }
219    } else {
220        if (*argv[1] == '-')
221            bb_show_usage();
222        while (argc >= 2) {
223            stack_machine(argv[1]);
224            argv++;
225            argc--;
226        }
227    }
228    return EXIT_SUCCESS;
229}
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