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annotate toys/other/modinfo.c @ 933:a81921ce4930

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Patch that assumes that the presence of the string ".ko" indicates use of a path to a module (*.ko.xz and similar included, but not supported).
author Isaac Dunham <idunham@lavabit.com>
date Sun, 23 Jun 2013 14:02:16 -0500
parents aff9fa1075eb
children d0ab54f62346
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1 /* modinfo.c - Display module info
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2 *
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3 * Copyright 2012 Andre Renaud <andre@bluewatersys.com>
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4
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5 USE_MODINFO(NEWTOY(modinfo, "<1F:0", TOYFLAG_BIN))
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6
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7 config MODINFO
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8 bool "modinfo"
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9 default y
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10 help
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11 usage: modinfo [-0] [-F field] [modulename...]
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12 */
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13
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14 #define FOR_modinfo
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15 #include "toys.h"
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16
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17 GLOBALS(
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18 char *field;
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20 long mod;
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21 )
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23 static char *modinfo_tags[] = {
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24 "alias", "license", "description", "author", "firmware",
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25 "vermagic", "srcversion", "intree", "parm", "depends",
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26 };
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28 static void output_field(char *field, char *value)
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29 {
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30 int len;
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32 if (TT.field && strcmp(TT.field, field)) return;
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34 len = strlen(field);
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36 if (TT.field) xprintf("%s", value);
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37 else xprintf("%s:%*s%s", field, 15 - len, "", value);
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38 xputc((toys.optflags & FLAG_0) ? 0 : '\n');
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39 }
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40
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41 static int modinfo_file(struct dirtree *dir)
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42 {
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43 int fd, len, i;
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44 char *buf, *pos, *full_name;
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45
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46 full_name = dirtree_path(dir, NULL);
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47 output_field("filename", full_name);
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48 fd = xopen(full_name, O_RDONLY);
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49 free(full_name);
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51 len = fdlength(fd);
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52 if (!(buf = mmap(0, len, PROT_READ, MAP_SHARED, fd, 0))) {
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53 perror_msg("mmap %s", full_name);
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54 return 1;
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55 }
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57 for (pos = buf; pos < buf+len; pos++) {
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58 if (*pos) continue;
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60 for (i = 0; i < sizeof(modinfo_tags) / sizeof(*modinfo_tags); i++) {
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61 char *str = modinfo_tags[i];
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62 int len = strlen(str);
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64 if (!strncmp(pos+1, str, len) && pos[len+1] == '=')
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65 output_field(str, pos+len+2);
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66 }
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67 }
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68
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69 munmap(buf, len);
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70 close(fd);
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71 return 0;
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72 }
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74 static int check_module(struct dirtree *new)
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75 {
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76 if (S_ISREG(new->st.st_mode)) {
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77 char *s;
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79 for (s = toys.optargs[TT.mod]; *s; s++) {
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80 int len = 0;
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82 // The kernel treats - and _ the same, so we should too.
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83 for (len = 0; s[len]; len++) {
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84 if (s[len] == '-' && new->name[len] == '_') continue;
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85 if (s[len] == '_' && new->name[len] == '-') continue;
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86 if (s[len] != new->name[len]) break;
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87 }
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88 if (s[len] || strcmp(new->name+len, ".ko")) break;
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90 modinfo_file(new);
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91 }
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92 }
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93
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94 return dirtree_notdotdot(new);
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95 }
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96
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97 void modinfo_main(void)
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98 {
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99 struct utsname uts;
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101 if (uname(&uts) < 0) perror_exit("bad uname");
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102 sprintf(toybuf, "/lib/modules/%s", uts.release);
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103
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104 for(TT.mod = 0; TT.mod<toys.optc; TT.mod++) {
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105 if (strstr(toys.optargs[TT.mod], ".ko")) {
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106 dirtree_read(toys.optargs[TT.mod], modinfo_file);
a81921ce4930 Patch that assumes that the presence of the string ".ko" indicates
Isaac Dunham <idunham@lavabit.com>
parents: 923
diff changeset
107 } else {
a81921ce4930 Patch that assumes that the presence of the string ".ko" indicates
Isaac Dunham <idunham@lavabit.com>
parents: 923
diff changeset
108 dirtree_read(toybuf, check_module);
a81921ce4930 Patch that assumes that the presence of the string ".ko" indicates
Isaac Dunham <idunham@lavabit.com>
parents: 923
diff changeset
109 }
923
aff9fa1075eb Upgrade modinfo to support multiple modules, and add tests, from Isaac Dunham.
Rob Landley <rob@landley.net>
parents: 884
diff changeset
110 }
620
312e4c3e00b1 Add modinfo by Andre Renaud.
Rob Landley <rob@landley.net>
parents:
diff changeset
111 }