Mercurial > hg > toybox

annotate toys/other/modinfo.c @ 694:786841fdb1e0

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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. The actual code should be the same afterward, this is just cosmetic refactoring.
author Rob Landley <rob@landley.net>
date Tue, 13 Nov 2012 17:14:08 -0600
parents 7e846e281e38
children 37e668afd008
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rev   line source
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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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19 )
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21 static const char *modinfo_tags[] = {
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22 "alias", "license", "description", "author", "vermagic",
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23 "srcversion", "intree", "parm", "depends",
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24 };
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25
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26 static void output_field(const char *field, const char *value)
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27 {
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28 int len;
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30 if (TT.field && strcmp(TT.field, field) != 0) return;
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32 len = strlen(field);
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33
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34 if (TT.field) xprintf("%s", value);
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35 else xprintf("%s:%*s%s", field, 15 - len, "", value);
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36 if (toys.optflags & FLAG_0) xwrite(fileno(stdout), "\0", 1);
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37 else xputs("");
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38 }
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41 static void 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;
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45 char *full_name;
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47 full_name = dirtree_path(dir, NULL);
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49 output_field("filename", full_name);
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50 fd = xopen(full_name, O_RDONLY);
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51 len = fdlength(fd);
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52 buf = xmalloc(len);
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53 xreadall(fd, buf, len);
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55 for (pos = buf; pos < buf + len + 10; pos++) {
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56 if (*pos) continue;
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57
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58 for (i = 0; i < sizeof(modinfo_tags) / sizeof(modinfo_tags[0]); i++) {
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59 const char *str = modinfo_tags[i];
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60 int len = strlen(str);
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61 if (strncmp(pos + 1, str, len) == 0 && pos[len + 1] == '=')
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62 output_field(str, &pos[len + 2]);
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63 }
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64 }
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66 free(full_name);
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67 free(buf);
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68 close(fd);
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69 }
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71 static int check_module(struct dirtree *new)
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72 {
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73 if (S_ISREG(new->st.st_mode)) {
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74 char **s;
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75 for (s = toys.optargs; *s; s++) {
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76 int len = strlen(*s);
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77 if (!strncmp(*s, new->name, len) && !strcmp(new->name+len, ".ko"))
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78 modinfo_file(new);
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79 }
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80 }
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82 return dirtree_notdotdot(new);
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83 }
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84
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85 void modinfo_main(void)
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86 {
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87 struct utsname uts;
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89 if (uname(&uts) < 0) perror_exit("bad uname");
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90 sprintf(toybuf, "/lib/modules/%s", uts.release);
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91 dirtree_read(toybuf, check_module);
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92 }