Mercurial > hg > toybox
annotate toys/other/modinfo.c @ 1776:7bf68329eb3b draft default tip
Repository switched to git at https://github.com/landley/toybox
author | Rob Landley <rob@landley.net> |
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date | Thu, 09 Apr 2015 02:28:32 -0500 |
parents | 3ac823675413 |
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Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
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1 /* modinfo.c - Display module info |
620 | 2 * |
3 * Copyright 2012 Andre Renaud <andre@bluewatersys.com> | |
4 | |
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5 USE_MODINFO(NEWTOY(modinfo, "<1b:k:F:0", TOYFLAG_BIN)) |
620 | 6 |
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] [-b basedir] [-k kernrelease] [-F field] [modulename...] |
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12 |
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13 Display module fields for all specified modules, looking in |
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14 <basedir>/lib/modules/<kernrelease>/ (kernrelease defaults to uname -r). |
620 | 15 */ |
16 | |
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17 #define FOR_modinfo |
620 | 18 #include "toys.h" |
19 | |
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20 GLOBALS( |
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21 char *field; |
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22 char *knam; |
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23 char *base; |
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24 |
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25 long mod; |
620 | 26 ) |
27 | |
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28 static void output_field(char *field, char *value) |
620 | 29 { |
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30 if (!TT.field) xprintf("%s:%*c", field, 15-(int)strlen(field), ' '); |
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31 else if (strcmp(TT.field, field)) return; |
934 | 32 xprintf("%s", value); |
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33 xputc((toys.optflags & FLAG_0) ? 0 : '\n'); |
620 | 34 } |
35 | |
934 | 36 static void modinfo_file(char *full_name) |
620 | 37 { |
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38 int fd, len, i; |
934 | 39 char *buf = 0, *pos, *modinfo_tags[] = { |
40 "alias", "license", "description", "author", "firmware", | |
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41 "vermagic", "srcversion", "intree", "depends", "parm", |
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42 "parmtype", |
934 | 43 }; |
620 | 44 |
934 | 45 if (-1 != (fd = open(full_name, O_RDONLY))) { |
46 len = fdlength(fd); | |
47 if (!(buf = mmap(0, len, PROT_READ, MAP_SHARED, fd, 0))) close(fd); | |
48 } | |
49 | |
50 if (!buf) { | |
51 perror_msg("%s", full_name); | |
52 return; | |
53 } | |
54 | |
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55 output_field("filename", full_name); |
620 | 56 |
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57 for (pos = buf; pos < buf+len; pos++) { |
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58 if (*pos) continue; |
620 | 59 |
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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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63 |
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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); |
620 | 66 } |
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67 } |
620 | 68 |
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69 munmap(buf, len); |
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70 close(fd); |
620 | 71 } |
72 | |
73 static int check_module(struct dirtree *new) | |
74 { | |
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75 if (S_ISREG(new->st.st_mode)) { |
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76 char *s; |
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77 |
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78 for (s = toys.optargs[TT.mod]; *s; s++) { |
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79 int len = 0; |
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80 |
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81 // The kernel treats - and _ the same, so we should too. |
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82 for (len = 0; s[len]; len++) { |
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83 if (s[len] == '-' && new->name[len] == '_') continue; |
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84 if (s[len] == '_' && new->name[len] == '-') continue; |
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85 if (s[len] != new->name[len]) break; |
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86 } |
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87 if (s[len] || strcmp(new->name+len, ".ko")) break; |
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88 |
934 | 89 modinfo_file(s = dirtree_path(new, NULL)); |
90 free(s); | |
91 | |
92 return DIRTREE_ABORT; | |
620 | 93 } |
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94 } |
620 | 95 |
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96 return dirtree_notdotdot(new); |
620 | 97 } |
98 | |
99 void modinfo_main(void) | |
100 { | |
934 | 101 for(TT.mod = 0; TT.mod<toys.optc; TT.mod++) { |
102 char *s = strstr(toys.optargs[TT.mod], ".ko"); | |
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103 |
934 | 104 if (s && !s[3]) modinfo_file(toys.optargs[TT.mod]); |
105 else { | |
106 struct utsname uts; | |
107 | |
108 if (uname(&uts) < 0) perror_exit("bad uname"); | |
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109 if (snprintf(toybuf, sizeof(toybuf), "%s/lib/modules/%s", |
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110 (toys.optflags & FLAG_b) ? TT.base : "", |
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111 (toys.optflags & FLAG_k) ? TT.knam : uts.release) >= sizeof(toybuf)) |
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112 perror_exit("basedir/kernrelease too long"); |
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113 dirtree_read(toybuf, check_module); |
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114 } |
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115 } |
620 | 116 } |