Mercurial > hg > toybox
annotate toys/other/modinfo.c @ 674:7e846e281e38
New build infrastructure to generate FLAG_ macros and TT alias, #define FOR_commandname before #including toys.h to trigger it. Rename DEFINE_GLOBALS() to just GLOBALS() (because I could never remember if it was DECLARE_GLOBALS). Convert existing commands to use new infrastructure, and replace optflag constants with FLAG_ macros where appropriate.
| author | Rob Landley <rob@landley.net> |
|---|---|
| date | Mon, 08 Oct 2012 00:02:30 -0500 |
| parents | 2986aa63a021 |
| children | 786841fdb1e0 |
| rev | line source |
|---|---|
| 620 | 1 /* vi: set sw=4 ts=4: |
| 2 * | |
| 3 * modinfo.c - Display module info | |
| 4 * | |
| 5 * Copyright 2012 Andre Renaud <andre@bluewatersys.com> | |
| 6 * | |
| 7 | |
| 8 USE_MODINFO(NEWTOY(modinfo, "<1F:0", TOYFLAG_BIN)) | |
| 9 | |
| 10 config MODINFO | |
| 11 bool "modinfo" | |
| 12 default y | |
| 13 help | |
| 14 usage: modinfo [-0] [-F field] [modulename...] | |
| 15 */ | |
| 16 | |
|
674
7e846e281e38
New build infrastructure to generate FLAG_ macros and TT alias, #define FOR_commandname before #including toys.h to trigger it. Rename DEFINE_GLOBALS() to just GLOBALS() (because I could never remember if it was DECLARE_GLOBALS). Convert existing commands to use new infrastructure, and replace optflag constants with FLAG_ macros where appropriate.
Rob Landley <rob@landley.net>
parents:
653
diff
changeset
|
17 #define FOR_modinfo |
| 620 | 18 #include "toys.h" |
| 19 | |
|
674
7e846e281e38
New build infrastructure to generate FLAG_ macros and TT alias, #define FOR_commandname before #including toys.h to trigger it. Rename DEFINE_GLOBALS() to just GLOBALS() (because I could never remember if it was DECLARE_GLOBALS). Convert existing commands to use new infrastructure, and replace optflag constants with FLAG_ macros where appropriate.
Rob Landley <rob@landley.net>
parents:
653
diff
changeset
|
20 GLOBALS( |
| 620 | 21 char *field; |
| 22 ) | |
| 23 | |
| 24 static const char *modinfo_tags[] = { | |
| 25 "alias", "license", "description", "author", "vermagic", | |
| 26 "srcversion", "intree", "parm", "depends", | |
| 27 }; | |
| 28 | |
| 29 static void output_field(const char *field, const char *value) | |
| 30 { | |
| 31 int len; | |
| 32 | |
| 33 if (TT.field && strcmp(TT.field, field) != 0) | |
| 34 return; | |
| 35 | |
| 36 len = strlen(field); | |
| 37 | |
| 38 if (TT.field) | |
| 39 xprintf("%s", value); | |
| 40 else | |
| 41 xprintf("%s:%*s%s", | |
| 42 field, 15 - len, "", value); | |
| 43 if (toys.optflags & FLAG_0) | |
| 44 xwrite(fileno(stdout), "\0", 1); | |
| 45 else | |
| 46 xputs(""); | |
| 47 } | |
| 48 | |
| 49 | |
| 50 static void modinfo_file(struct dirtree *dir) | |
| 51 { | |
| 52 int fd, len, i; | |
| 53 char *buf, *pos; | |
| 54 char *full_name; | |
| 55 | |
| 56 full_name = dirtree_path(dir, NULL); | |
| 57 | |
| 58 output_field("filename", full_name); | |
| 59 fd = xopen(full_name, O_RDONLY); | |
| 60 len = fdlength(fd); | |
| 61 buf = xmalloc(len); | |
| 62 xreadall(fd, buf, len); | |
| 63 | |
| 64 for (pos = buf; pos < buf + len + 10; pos++) { | |
| 65 if (*pos) | |
| 66 continue; | |
| 67 | |
| 68 for (i = 0; i < sizeof(modinfo_tags) / sizeof(modinfo_tags[0]); i++) { | |
| 69 const char *str = modinfo_tags[i]; | |
| 70 int len = strlen(str); | |
| 71 if (strncmp(pos + 1, str, len) == 0 && pos[len + 1] == '=') | |
| 72 output_field(str, &pos[len + 2]); | |
| 73 } | |
| 74 } | |
| 75 | |
| 76 free(full_name); | |
| 77 free(buf); | |
| 78 close(fd); | |
| 79 } | |
| 80 | |
| 81 static int check_module(struct dirtree *new) | |
| 82 { | |
| 83 if (S_ISREG(new->st.st_mode)) { | |
| 84 char **s; | |
| 85 for (s = toys.optargs; *s; s++) { | |
| 86 int len = strlen(*s); | |
| 632 | 87 if (!strncmp(*s, new->name, len) && !strcmp(new->name+len, ".ko")) |
| 620 | 88 modinfo_file(new); |
| 89 } | |
| 90 } | |
| 91 | |
| 92 return dirtree_notdotdot(new); | |
| 93 } | |
| 94 | |
| 95 void modinfo_main(void) | |
| 96 { | |
| 97 struct utsname uts; | |
| 632 | 98 if (uname(&uts) < 0) perror_exit("bad uname"); |
| 620 | 99 sprintf(toybuf, "/lib/modules/%s", uts.release); |
| 100 dirtree_read(toybuf, check_module); | |
| 101 } |