stat: code shrink; stop using bss; stop using strncat incorrectly
function old new delta printfs - 28 +28 strcatc - 26 +26 human_time 41 44 +3 print_it 229 219 -10 buf 30 - -30 print_statfs 420 358 -62 print_stat 1089 921 -168 ------------------------------------------------------------------------------ (add/remove: 2/1 grow/shrink: 1/3 up/down: 57/-270) Total: -213 bytes text data bss dec hex filename 771105 1029 9552 781686 bed76 busybox_old 770892 1029 9520 781441 bec81 busybox_unstripped
This commit is contained in:
Denis Vlasenko
parent
91e80c2be7
commit
91e5203205
191
coreutils/stat.c
191
coreutils/stat.c
@ -16,14 +16,12 @@
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#include "libbb.h"
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/* vars to control behavior */
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#define OPT_FILESYS (1<<0)
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#define OPT_TERSE (1<<1)
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#define OPT_DEREFERENCE (1<<2)
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#define OPT_SELINUX (1<<3)
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#define OPT_FILESYS (1 << 0)
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#define OPT_TERSE (1 << 1)
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#define OPT_DEREFERENCE (1 << 2)
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#define OPT_SELINUX (1 << 3)
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static char buf[sizeof("YYYY-MM-DD HH:MM:SS.000000000")] ALIGN1;
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static char const * file_type(struct stat const *st)
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static const char *file_type(const struct stat *st)
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{
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/* See POSIX 1003.1-2001 XCU Table 4-8 lines 17093-17107
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* for some of these formats.
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@ -46,7 +44,7 @@ static char const * file_type(struct stat const *st)
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return "weird file";
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}
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static char const *human_time(time_t t)
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static const char *human_time(time_t t)
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{
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/* Old
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static char *str;
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@ -56,8 +54,12 @@ static char const *human_time(time_t t)
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*/
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/* coreutils 6.3 compat: */
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/*static char buf[sizeof("YYYY-MM-DD HH:MM:SS.000000000")] ALIGN1;*/
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#define buf bb_common_bufsiz1
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strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S.000000000", localtime(&t));
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return buf;
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#undef buf
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}
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/* Return the type of the specified file system.
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@ -65,11 +67,10 @@ static char const *human_time(time_t t)
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* Others have statfs.f_fstypename[MFSNAMELEN]. (NetBSD 1.5.2)
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* Still others have neither and have to get by with f_type (Linux).
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*/
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static char const *human_fstype(long f_type)
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static const char *human_fstype(uint32_t f_type)
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{
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int i;
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static const struct types {
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long type;
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uint32_t type;
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const char *const fs;
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} humantypes[] = {
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{ 0xADFF, "affs" },
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@ -109,67 +110,80 @@ static char const *human_fstype(long f_type)
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{ 0x62656572, "sysfs" },
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{ 0, "UNKNOWN" }
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};
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int i;
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for (i = 0; humantypes[i].type; ++i)
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if (humantypes[i].type == f_type)
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break;
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return humantypes[i].fs;
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}
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static void strcatc(char *str, char c)
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{
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int len = strlen(str);
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str[len++] = c;
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str[len] = '\0';
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}
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static void printfs(char *pformat, const char *msg)
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{
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strcatc(pformat, 's');
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printf(pformat, msg);
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}
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#if ENABLE_FEATURE_STAT_FORMAT
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/* print statfs info */
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static void print_statfs(char *pformat, const size_t buf_len, const char m,
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const char *const filename, void const *data
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USE_SELINUX(, security_context_t scontext))
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static void print_statfs(char *pformat, const char m,
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const char *const filename, const void *data
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USE_SELINUX(, security_context_t scontext))
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{
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struct statfs const *statfsbuf = data;
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const struct statfs *statfsbuf = data;
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if (m == 'n') {
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strncat(pformat, "s", buf_len);
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printf(pformat, filename);
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printfs(pformat, filename);
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} else if (m == 'i') {
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strncat(pformat, "Lx", buf_len);
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strcat(pformat, "Lx");
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printf(pformat, statfsbuf->f_fsid);
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} else if (m == 'l') {
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strncat(pformat, "lu", buf_len);
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strcat(pformat, "lu");
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printf(pformat, statfsbuf->f_namelen);
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} else if (m == 't') {
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strncat(pformat, "lx", buf_len);
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strcat(pformat, "lx");
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printf(pformat, (unsigned long) (statfsbuf->f_type)); /* no equiv */
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} else if (m == 'T') {
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strncat(pformat, "s", buf_len);
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printf(pformat, human_fstype(statfsbuf->f_type));
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printfs(pformat, human_fstype(statfsbuf->f_type));
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} else if (m == 'b') {
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strncat(pformat, "jd", buf_len);
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strcat(pformat, "jd");
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printf(pformat, (intmax_t) (statfsbuf->f_blocks));
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} else if (m == 'f') {
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strncat(pformat, "jd", buf_len);
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strcat(pformat, "jd");
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printf(pformat, (intmax_t) (statfsbuf->f_bfree));
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} else if (m == 'a') {
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strncat(pformat, "jd", buf_len);
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strcat(pformat, "jd");
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printf(pformat, (intmax_t) (statfsbuf->f_bavail));
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} else if (m == 's' || m == 'S') {
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strncat(pformat, "lu", buf_len);
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strcat(pformat, "lu");
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printf(pformat, (unsigned long) (statfsbuf->f_bsize));
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} else if (m == 'c') {
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strncat(pformat, "jd", buf_len);
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strcat(pformat, "jd");
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printf(pformat, (intmax_t) (statfsbuf->f_files));
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} else if (m == 'd') {
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strncat(pformat, "jd", buf_len);
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strcat(pformat, "jd");
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printf(pformat, (intmax_t) (statfsbuf->f_ffree));
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#if ENABLE_SELINUX
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} else if (m == 'C' && (option_mask32 & OPT_SELINUX)) {
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strncat(pformat, "s", buf_len);
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printf(scontext);
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printfs(pformat, scontext);
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#endif
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} else {
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strncat(pformat, "c", buf_len);
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strcatc(pformat, 'c');
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printf(pformat, m);
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}
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}
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/* print stat info */
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static void print_stat(char *pformat, const size_t buf_len, const char m,
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const char *const filename, void const *data
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USE_SELINUX(, security_context_t scontext))
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static void print_stat(char *pformat, const char m,
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const char *const filename, const void *data
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USE_SELINUX(, security_context_t scontext))
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{
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#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
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struct stat *statbuf = (struct stat *) data;
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@ -177,131 +191,118 @@ static void print_stat(char *pformat, const size_t buf_len, const char m,
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struct group *gw_ent;
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if (m == 'n') {
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strncat(pformat, "s", buf_len);
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printf(pformat, filename);
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printfs(pformat, filename);
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} else if (m == 'N') {
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strncat(pformat, "s", buf_len);
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strcatc(pformat, 's');
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if (S_ISLNK(statbuf->st_mode)) {
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char *linkname = xmalloc_readlink_or_warn(filename);
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if (linkname == NULL) {
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bb_perror_msg("cannot read symbolic link '%s'", filename);
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if (linkname == NULL)
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return;
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}
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/*printf("\"%s\" -> \"%s\"", filename, linkname); */
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printf(pformat, filename);
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printf(" -> ");
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printf(pformat, linkname);
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free(linkname);
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} else {
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printf(pformat, filename);
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}
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} else if (m == 'd') {
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strncat(pformat, "ju", buf_len);
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strcat(pformat, "ju");
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printf(pformat, (uintmax_t) statbuf->st_dev);
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} else if (m == 'D') {
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strncat(pformat, "jx", buf_len);
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strcat(pformat, "jx");
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printf(pformat, (uintmax_t) statbuf->st_dev);
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} else if (m == 'i') {
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strncat(pformat, "ju", buf_len);
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strcat(pformat, "ju");
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printf(pformat, (uintmax_t) statbuf->st_ino);
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} else if (m == 'a') {
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strncat(pformat, "lo", buf_len);
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strcat(pformat, "lo");
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printf(pformat, (unsigned long) (statbuf->st_mode & (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO)));
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} else if (m == 'A') {
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strncat(pformat, "s", buf_len);
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printf(pformat, bb_mode_string(statbuf->st_mode));
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printfs(pformat, bb_mode_string(statbuf->st_mode));
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} else if (m == 'f') {
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strncat(pformat, "lx", buf_len);
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strcat(pformat, "lx");
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printf(pformat, (unsigned long) statbuf->st_mode);
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} else if (m == 'F') {
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strncat(pformat, "s", buf_len);
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printf(pformat, file_type(statbuf));
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printfs(pformat, file_type(statbuf));
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} else if (m == 'h') {
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strncat(pformat, "lu", buf_len);
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strcat(pformat, "lu");
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printf(pformat, (unsigned long) statbuf->st_nlink);
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} else if (m == 'u') {
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strncat(pformat, "lu", buf_len);
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strcat(pformat, "lu");
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printf(pformat, (unsigned long) statbuf->st_uid);
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} else if (m == 'U') {
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strncat(pformat, "s", buf_len);
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setpwent();
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pw_ent = getpwuid(statbuf->st_uid);
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printf(pformat, (pw_ent != 0L) ? pw_ent->pw_name : "UNKNOWN");
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printfs(pformat, (pw_ent != 0L) ? pw_ent->pw_name : "UNKNOWN");
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} else if (m == 'g') {
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strncat(pformat, "lu", buf_len);
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strcat(pformat, "lu");
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printf(pformat, (unsigned long) statbuf->st_gid);
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} else if (m == 'G') {
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strncat(pformat, "s", buf_len);
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setgrent();
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gw_ent = getgrgid(statbuf->st_gid);
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printf(pformat, (gw_ent != 0L) ? gw_ent->gr_name : "UNKNOWN");
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printfs(pformat, (gw_ent != 0L) ? gw_ent->gr_name : "UNKNOWN");
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} else if (m == 't') {
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strncat(pformat, "lx", buf_len);
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strcat(pformat, "lx");
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printf(pformat, (unsigned long) major(statbuf->st_rdev));
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} else if (m == 'T') {
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strncat(pformat, "lx", buf_len);
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strcat(pformat, "lx");
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printf(pformat, (unsigned long) minor(statbuf->st_rdev));
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} else if (m == 's') {
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strncat(pformat, "ju", buf_len);
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strcat(pformat, "ju");
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printf(pformat, (uintmax_t) (statbuf->st_size));
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} else if (m == 'B') {
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strncat(pformat, "lu", buf_len);
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strcat(pformat, "lu");
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printf(pformat, (unsigned long) 512); //ST_NBLOCKSIZE
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} else if (m == 'b') {
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strncat(pformat, "ju", buf_len);
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strcat(pformat, "ju");
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printf(pformat, (uintmax_t) statbuf->st_blocks);
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} else if (m == 'o') {
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strncat(pformat, "lu", buf_len);
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strcat(pformat, "lu");
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printf(pformat, (unsigned long) statbuf->st_blksize);
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} else if (m == 'x') {
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strncat(pformat, "s", buf_len);
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printf(pformat, human_time(statbuf->st_atime));
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printfs(pformat, human_time(statbuf->st_atime));
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} else if (m == 'X') {
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strncat(pformat, TYPE_SIGNED(time_t) ? "ld" : "lu", buf_len);
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strcat(pformat, TYPE_SIGNED(time_t) ? "ld" : "lu");
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printf(pformat, (unsigned long) statbuf->st_atime);
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} else if (m == 'y') {
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strncat(pformat, "s", buf_len);
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printf(pformat, human_time(statbuf->st_mtime));
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printfs(pformat, human_time(statbuf->st_mtime));
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} else if (m == 'Y') {
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strncat(pformat, TYPE_SIGNED(time_t) ? "ld" : "lu", buf_len);
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strcat(pformat, TYPE_SIGNED(time_t) ? "ld" : "lu");
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printf(pformat, (unsigned long) statbuf->st_mtime);
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} else if (m == 'z') {
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strncat(pformat, "s", buf_len);
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printf(pformat, human_time(statbuf->st_ctime));
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printfs(pformat, human_time(statbuf->st_ctime));
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} else if (m == 'Z') {
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strncat(pformat, TYPE_SIGNED(time_t) ? "ld" : "lu", buf_len);
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strcat(pformat, TYPE_SIGNED(time_t) ? "ld" : "lu");
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printf(pformat, (unsigned long) statbuf->st_ctime);
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#if ENABLE_SELINUX
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} else if (m == 'C' && (option_mask32 & OPT_SELINUX)) {
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strncat(pformat, "s", buf_len);
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printf(pformat, scontext);
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printfs(pformat, scontext);
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#endif
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} else {
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strncat(pformat, "c", buf_len);
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strcatc(pformat, 'c');
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printf(pformat, m);
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}
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}
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static void print_it(char const *masterformat, char const *filename,
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void (*print_func) (char *, size_t, char, char const *, void const *
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USE_SELINUX(, security_context_t scontext)),
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void const *data USE_SELINUX(, security_context_t scontext) )
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static void print_it(const char *masterformat, const char *filename,
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void (*print_func) (char*, char, const char*, const void* USE_SELINUX(, security_context_t scontext)),
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const void *data
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USE_SELINUX(, security_context_t scontext) )
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{
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char *b;
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/* create a working copy of the format string */
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/* Create a working copy of the format string */
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char *format = xstrdup(masterformat);
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/* Add 2 to accomodate our conversion of the stat '%s' format string
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* to the printf '%llu' one. */
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size_t n_alloc = strlen(format) + 2 + 1;
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char *dest = xmalloc(n_alloc);
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char *dest = xmalloc(strlen(format) + 2 + 1);
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char *b;
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b = format;
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while (b) {
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size_t len;
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char *p = strchr(b, '%');
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if (!p) {
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/* coreutils 6.3 always print <cr> at the end */
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/* coreutils 6.3 always prints <cr> at the end */
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/*fputs(b, stdout);*/
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puts(b);
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break;
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@ -309,10 +310,11 @@ static void print_it(char const *masterformat, char const *filename,
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*p++ = '\0';
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fputs(b, stdout);
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/* dest = "%<modifiers>" */
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len = strspn(p, "#-+.I 0123456789");
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dest[0] = '%';
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memcpy(dest + 1, p, len);
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dest[1 + len] = 0;
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dest[1 + len] = '\0';
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p += len;
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b = p + 1;
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@ -324,7 +326,8 @@ static void print_it(char const *masterformat, char const *filename,
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bb_putchar('%');
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break;
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default:
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print_func(dest, n_alloc, *p, filename, data USE_SELINUX(,scontext));
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/* Completes "%<modifiers>" with specifier and printfs */
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print_func(dest, *p, filename, data USE_SELINUX(,scontext));
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break;
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}
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}
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@ -335,7 +338,7 @@ static void print_it(char const *masterformat, char const *filename,
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#endif
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/* Stat the file system and print what we find. */
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static bool do_statfs(char const *filename, char const *format)
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static bool do_statfs(const char *filename, const char *format)
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{
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struct statfs statfsbuf;
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#if ENABLE_SELINUX
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@ -358,7 +361,7 @@ static bool do_statfs(char const *filename, char const *format)
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}
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#if ENABLE_FEATURE_STAT_FORMAT
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if (format == NULL)
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if (format == NULL) {
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#if !ENABLE_SELINUX
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format = (option_mask32 & OPT_TERSE
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? "%n %i %l %t %s %b %f %a %c %d\n"
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@ -367,9 +370,8 @@ static bool do_statfs(char const *filename, char const *format)
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"Block size: %-10s\n"
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"Blocks: Total: %-10b Free: %-10f Available: %a\n"
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"Inodes: Total: %-10c Free: %d");
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print_it(format, filename, print_statfs, &statfsbuf USE_SELINUX(, scontext));
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#else
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format = (option_mask32 & OPT_TERSE
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format = (option_mask32 & OPT_TERSE
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? (option_mask32 & OPT_SELINUX ? "%n %i %l %t %s %b %f %a %c %d %C\n":
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"%n %i %l %t %s %b %f %a %c %d\n")
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: (option_mask32 & OPT_SELINUX ?
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@ -385,8 +387,9 @@ static bool do_statfs(char const *filename, char const *format)
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"Blocks: Total: %-10b Free: %-10f Available: %a\n"
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"Inodes: Total: %-10c Free: %d\n")
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);
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print_it(format, filename, print_statfs, &statfsbuf USE_SELINUX(, scontext));
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#endif /* SELINUX */
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}
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print_it(format, filename, print_statfs, &statfsbuf USE_SELINUX(, scontext));
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||||
#else /* FEATURE_STAT_FORMAT */
|
||||
format = (option_mask32 & OPT_TERSE
|
||||
? "%s %llx %lu "
|
||||
@ -444,7 +447,7 @@ static bool do_statfs(char const *filename, char const *format)
|
||||
}
|
||||
|
||||
/* stat the file and print what we find */
|
||||
static bool do_stat(char const *filename, char const *format)
|
||||
static bool do_stat(const char *filename, const char *format)
|
||||
{
|
||||
struct stat statbuf;
|
||||
#if ENABLE_SELINUX
|
||||
@ -612,7 +615,7 @@ int stat_main(int argc, char **argv)
|
||||
char *format = NULL;
|
||||
int i;
|
||||
int ok = 1;
|
||||
bool (*statfunc)(char const *, char const *) = do_stat;
|
||||
bool (*statfunc)(const char *, const char *) = do_stat;
|
||||
|
||||
getopt32(argv, "ftL"
|
||||
USE_SELINUX("Z")
|
||||
|
||||
Loading…
Reference in New Issue
Block a user