1 /* modinfo.c - Display module info 2 * 3 * Copyright 2012 Andre Renaud <andre (at) bluewatersys.com> 4 * 5 * TODO: cleanup 6 7 USE_MODINFO(NEWTOY(modinfo, "<1b:k:F:0", TOYFLAG_BIN)) 8 9 config MODINFO 10 bool "modinfo" 11 default y 12 help 13 usage: modinfo [-0] [-b basedir] [-k kernrelease] [-F field] [modulename...] 14 15 Display module fields for all specified modules, looking in 16 <basedir>/lib/modules/<kernrelease>/ (kernrelease defaults to uname -r). 17 */ 18 19 #define FOR_modinfo 20 #include "toys.h" 21 22 GLOBALS( 23 char *field; 24 char *knam; 25 char *base; 26 27 long mod; 28 ) 29 30 static void output_field(char *field, char *value) 31 { 32 if (!TT.field) xprintf("%s:%*c", field, 15-(int)strlen(field), ' '); 33 else if (strcmp(TT.field, field)) return; 34 xprintf("%s", value); 35 xputc((toys.optflags & FLAG_0) ? 0 : '\n'); 36 } 37 38 static void modinfo_file(char *full_name) 39 { 40 int fd, len, i; 41 char *buf = 0, *pos, *modinfo_tags[] = { 42 "alias", "license", "description", "author", "firmware", 43 "vermagic", "srcversion", "intree", "depends", "parm", 44 "parmtype", 45 }; 46 47 if (-1 != (fd = open(full_name, O_RDONLY))) { 48 len = fdlength(fd); 49 if (!(buf = mmap(0, len, PROT_READ, MAP_SHARED, fd, 0))) close(fd); 50 } 51 52 if (!buf) { 53 perror_msg_raw(full_name); 54 return; 55 } 56 57 output_field("filename", full_name); 58 59 for (pos = buf; pos < buf+len; pos++) { 60 if (*pos) continue; 61 62 for (i = 0; i < sizeof(modinfo_tags) / sizeof(*modinfo_tags); i++) { 63 char *str = modinfo_tags[i]; 64 int len = strlen(str); 65 66 if (!strncmp(pos+1, str, len) && pos[len+1] == '=') 67 output_field(str, pos+len+2); 68 } 69 } 70 71 munmap(buf, len); 72 close(fd); 73 } 74 75 static int check_module(struct dirtree *new) 76 { 77 if (S_ISREG(new->st.st_mode)) { 78 char *s; 79 80 for (s = toys.optargs[TT.mod]; *s; s++) { 81 int len = 0; 82 83 // The kernel treats - and _ the same, so we should too. 84 for (len = 0; s[len]; len++) { 85 if (s[len] == '-' && new->name[len] == '_') continue; 86 if (s[len] == '_' && new->name[len] == '-') continue; 87 if (s[len] != new->name[len]) break; 88 } 89 if (s[len] || strcmp(new->name+len, ".ko")) break; 90 91 modinfo_file(s = dirtree_path(new, NULL)); 92 free(s); 93 94 return DIRTREE_ABORT; 95 } 96 } 97 98 return dirtree_notdotdot(new); 99 } 100 101 void modinfo_main(void) 102 { 103 for(TT.mod = 0; TT.mod<toys.optc; TT.mod++) { 104 char *s = strstr(toys.optargs[TT.mod], ".ko"); 105 106 if (s && !s[3]) modinfo_file(toys.optargs[TT.mod]); 107 else { 108 struct utsname uts; 109 110 if (uname(&uts) < 0) perror_exit("bad uname"); 111 if (snprintf(toybuf, sizeof(toybuf), "%s/lib/modules/%s", 112 (toys.optflags & FLAG_b) ? TT.base : "", 113 (toys.optflags & FLAG_k) ? TT.knam : uts.release) >= sizeof(toybuf)) 114 perror_exit("basedir/kernrelease too long"); 115 dirtree_read(toybuf, check_module); 116 } 117 } 118 } 119