From 8dff01d06a7ebd7330e3a1dd1ba47b3c74ee7dfb Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Thu, 12 Mar 2015 17:48:34 +0100 Subject: libbb: introduce and use is_prefixed_with() function old new delta is_prefixed_with - 18 +18 complete_username 78 77 -1 man_main 737 735 -2 fsck_device 429 427 -2 unpack_ar_archive 80 76 -4 strip_unsafe_prefix 105 101 -4 singlemount 1054 1050 -4 rtc_adjtime_is_utc 90 86 -4 resolve_mount_spec 88 84 -4 parse_one_line 1029 1025 -4 parse_conf 1460 1456 -4 may_wakeup 83 79 -4 loadkmap_main 219 215 -4 get_irqs_from_stat 103 99 -4 get_header_cpio 913 909 -4 findfs_main 79 75 -4 fbsplash_main 1230 1226 -4 load_crontab 776 771 -5 expand_vars_to_list 1151 1146 -5 date_main 881 876 -5 skip_dev_pfx 30 24 -6 make_device 2199 2193 -6 complete_cmd_dir_file 773 767 -6 run_applet_and_exit 715 708 -7 uudecode_main 321 313 -8 pwdx_main 197 189 -8 execute 568 560 -8 i2cdetect_main 1186 1176 -10 procps_scan 1242 1230 -12 procps_read_smaps 1017 1005 -12 process_module 746 734 -12 patch_main 1903 1891 -12 nfsmount 3572 3560 -12 stack_machine 126 112 -14 process_timer_stats 449 435 -14 match_fstype 111 97 -14 do_ipaddr 1344 1330 -14 open_list_and_close 359 343 -16 get_header_tar 1795 1779 -16 prepend_new_eth_table 340 323 -17 fsck_main 1811 1794 -17 find_iface_state 56 38 -18 dnsd_main 1321 1303 -18 base_device 179 158 -21 find_keyword 104 82 -22 handle_incoming_and_exit 2785 2762 -23 parse_and_put_prompt 774 746 -28 modinfo 347 317 -30 find_action 204 171 -33 update_passwd 1470 1436 -34 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/49 up/down: 18/-540) Total: -522 bytes Signed-off-by: Denys Vlasenko --- modutils/depmod.c | 8 ++++---- modutils/modinfo.c | 12 +++++++----- modutils/modprobe-small.c | 21 +++++++++++---------- modutils/modprobe.c | 12 ++++-------- modutils/modutils-24.c | 2 +- 5 files changed, 27 insertions(+), 28 deletions(-) (limited to 'modutils') diff --git a/modutils/depmod.c b/modutils/depmod.c index 37a8482d9..9713aef92 100644 --- a/modutils/depmod.c +++ b/modutils/depmod.c @@ -55,7 +55,7 @@ static int FAST_FUNC parse_module(const char *fname, struct stat *sb UNUSED_PARA NULL ); for (ptr = image; ptr < image + len - 10; ptr++) { - if (strncmp(ptr, "depends=", 8) == 0) { + if (is_prefixed_with(ptr, "depends=")) { char *u; ptr += 8; @@ -64,15 +64,15 @@ static int FAST_FUNC parse_module(const char *fname, struct stat *sb UNUSED_PARA *u = '_'; ptr += string_to_llist(ptr, &info->dependencies, ","); } else if (ENABLE_FEATURE_MODUTILS_ALIAS - && strncmp(ptr, "alias=", 6) == 0 + && is_prefixed_with(ptr, "alias=") ) { llist_add_to(&info->aliases, xstrdup(ptr + 6)); ptr += strlen(ptr); } else if (ENABLE_FEATURE_MODUTILS_SYMBOLS - && strncmp(ptr, "__ksymtab_", 10) == 0 + && is_prefixed_with(ptr, "__ksymtab_") ) { ptr += 10; - if (strncmp(ptr, "gpl", 3) == 0 + if (is_prefixed_with(ptr, "gpl") || strcmp(ptr, "strings") == 0 ) { continue; diff --git a/modutils/modinfo.c b/modutils/modinfo.c index ee379304c..8e74b6438 100644 --- a/modutils/modinfo.c +++ b/modutils/modinfo.c @@ -62,7 +62,7 @@ static void modinfo(const char *path, const char *version, "firmware", }; size_t len; - int j, length; + int j; char *ptr, *the_module; const char *field = env->field; int tags = env->tags; @@ -94,16 +94,18 @@ static void modinfo(const char *path, const char *version, pattern = field; if ((1< 0) { char *old = ptr; + char *after_word; + /* search for the first char in word */ - ptr = memchr(ptr, *word, len); + ptr = memchr(ptr, word[0], len); if (ptr == NULL) /* no occurance left, done */ break; - if (strncmp(ptr, word, wlen) == 0) - return ptr + wlen; /* found, return ptr past it */ + after_word = is_prefixed_with(ptr, word); + if (after_word) + return after_word; /* found, return ptr past it */ ++ptr; len -= (ptr - old); } @@ -536,7 +536,7 @@ static module_info** find_alias(const char *alias) // TODO: open only once, invent config_rewind() static int already_loaded(const char *name) { - int ret, namelen; + int ret; char *line; FILE *fp; @@ -545,15 +545,16 @@ static int already_loaded(const char *name) fp = fopen_for_read("/proc/modules"); if (!fp) return 0; - namelen = strlen(name); while ((line = xmalloc_fgetline(fp)) != NULL) { char *live; + char *after_name; // Examples from kernel 3.14.6: //pcspkr 12718 0 - Live 0xffffffffa017e000 //snd_timer 28690 2 snd_seq,snd_pcm, Live 0xffffffffa025e000 //i915 801405 2 - Live 0xffffffffa0096000 - if (strncmp(line, name, namelen) != 0 || line[namelen] != ' ') { + after_name = is_prefixed_with(line, name); + if (!after_name || *after_name != ' ') { free(line); continue; } diff --git a/modutils/modprobe.c b/modutils/modprobe.c index 0e8aa9e85..996de4074 100644 --- a/modutils/modprobe.c +++ b/modutils/modprobe.c @@ -260,7 +260,7 @@ static void add_probe(const char *name) llist_add_to_end(&G.probes, m); G.num_unresolved_deps++; if (ENABLE_FEATURE_MODUTILS_SYMBOLS - && strncmp(m->modname, "symbol:", 7) == 0 + && is_prefixed_with(m->modname, "symbol:") ) { G.need_symbols = 1; } @@ -353,22 +353,18 @@ static char *parse_and_add_kcmdline_module_options(char *options, const char *mo char *kcmdline_buf; char *kcmdline; char *kptr; - int len; kcmdline_buf = xmalloc_open_read_close("/proc/cmdline", NULL); if (!kcmdline_buf) return options; kcmdline = kcmdline_buf; - len = strlen(modulename); while ((kptr = strsep(&kcmdline, "\n\t ")) != NULL) { - if (strncmp(modulename, kptr, len) != 0) - continue; - kptr += len; - if (*kptr != '.') + char *after_modulename = is_prefixed_with(kptr, modulename); + if (!after_modulename || *after_modulename != '.') continue; /* It is "modulename.xxxx" */ - kptr++; + kptr = after_modulename + 1; if (strchr(kptr, '=') != NULL) { /* It is "modulename.opt=[val]" */ options = gather_options_str(options, kptr); diff --git a/modutils/modutils-24.c b/modutils/modutils-24.c index 12cb75c54..fe46fc3fd 100644 --- a/modutils/modutils-24.c +++ b/modutils/modutils-24.c @@ -2255,7 +2255,7 @@ static int add_symbols_from(struct obj_file *f, * symbols so they cannot fudge it by adding the prefix on * their references. */ - if (strncmp((char *)s->name, "GPLONLY_", 8) == 0) { + if (is_prefixed_with((char *)s->name, "GPLONLY_")) { #if ENABLE_FEATURE_CHECK_TAINTED_MODULE if (gpl) s->name += 8; 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