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authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-10-05 20:31:23 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-10-05 20:31:23 +0000
commit91e520320510fe4c535eaf26ff24de44d2a55c66 (patch)
tree9dc96702b363184e260ab7631d8683cf64022afe /coreutils
parent91e80c2be7d53b116ef23072ecaa89168b8e5bfc (diff)
downloadbusybox-91e520320510fe4c535eaf26ff24de44d2a55c66.tar.gz
busybox-91e520320510fe4c535eaf26ff24de44d2a55c66.tar.bz2
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
Diffstat (limited to 'coreutils')
-rw-r--r--coreutils/stat.c191
1 files changed, 97 insertions, 94 deletions
diff --git a/coreutils/stat.c b/coreutils/stat.c
index a0424d936..ed6580ef0 100644
--- a/coreutils/stat.c
+++ b/coreutils/stat.c
@@ -16,14 +16,12 @@
#include "libbb.h"
/* vars to control behavior */
-#define OPT_FILESYS (1<<0)
-#define OPT_TERSE (1<<1)
-#define OPT_DEREFERENCE (1<<2)
-#define OPT_SELINUX (1<<3)
+#define OPT_FILESYS (1 << 0)
+#define OPT_TERSE (1 << 1)
+#define OPT_DEREFERENCE (1 << 2)
+#define OPT_SELINUX (1 << 3)
-static char buf[sizeof("YYYY-MM-DD HH:MM:SS.000000000")] ALIGN1;
-
-static char const * file_type(struct stat const *st)
+static const char *file_type(const struct stat *st)
{
/* See POSIX 1003.1-2001 XCU Table 4-8 lines 17093-17107
* for some of these formats.
@@ -46,7 +44,7 @@ static char const * file_type(struct stat const *st)
return "weird file";
}
-static char const *human_time(time_t t)
+static const char *human_time(time_t t)
{
/* Old
static char *str;
@@ -56,8 +54,12 @@ static char const *human_time(time_t t)
*/
/* coreutils 6.3 compat: */
+ /*static char buf[sizeof("YYYY-MM-DD HH:MM:SS.000000000")] ALIGN1;*/
+#define buf bb_common_bufsiz1
+
strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S.000000000", localtime(&t));
return buf;
+#undef buf
}
/* Return the type of the specified file system.
@@ -65,11 +67,10 @@ static char const *human_time(time_t t)
* Others have statfs.f_fstypename[MFSNAMELEN]. (NetBSD 1.5.2)
* Still others have neither and have to get by with f_type (Linux).
*/
-static char const *human_fstype(long f_type)
+static const char *human_fstype(uint32_t f_type)
{
- int i;
static const struct types {
- long type;
+ uint32_t type;
const char *const fs;
} humantypes[] = {
{ 0xADFF, "affs" },
@@ -109,67 +110,80 @@ static char const *human_fstype(long f_type)
{ 0x62656572, "sysfs" },
{ 0, "UNKNOWN" }
};
+
+ int i;
+
for (i = 0; humantypes[i].type; ++i)
if (humantypes[i].type == f_type)
break;
return humantypes[i].fs;
}
+static void strcatc(char *str, char c)
+{
+ int len = strlen(str);
+ str[len++] = c;
+ str[len] = '\0';
+}
+
+static void printfs(char *pformat, const char *msg)
+{
+ strcatc(pformat, 's');
+ printf(pformat, msg);
+}
+
#if ENABLE_FEATURE_STAT_FORMAT
/* print statfs info */
-static void print_statfs(char *pformat, const size_t buf_len, const char m,
- const char *const filename, void const *data
- USE_SELINUX(, security_context_t scontext))
+static void print_statfs(char *pformat, const char m,
+ const char *const filename, const void *data
+ USE_SELINUX(, security_context_t scontext))
{
- struct statfs const *statfsbuf = data;
+ const struct statfs *statfsbuf = data;
if (m == 'n') {
- strncat(pformat, "s", buf_len);
- printf(pformat, filename);
+ printfs(pformat, filename);
} else if (m == 'i') {
- strncat(pformat, "Lx", buf_len);
+ strcat(pformat, "Lx");
printf(pformat, statfsbuf->f_fsid);
} else if (m == 'l') {
- strncat(pformat, "lu", buf_len);
+ strcat(pformat, "lu");
printf(pformat, statfsbuf->f_namelen);
} else if (m == 't') {
- strncat(pformat, "lx", buf_len);
+ strcat(pformat, "lx");
printf(pformat, (unsigned long) (statfsbuf->f_type)); /* no equiv */
} else if (m == 'T') {
- strncat(pformat, "s", buf_len);
- printf(pformat, human_fstype(statfsbuf->f_type));
+ printfs(pformat, human_fstype(statfsbuf->f_type));
} else if (m == 'b') {
- strncat(pformat, "jd", buf_len);
+ strcat(pformat, "jd");
printf(pformat, (intmax_t) (statfsbuf->f_blocks));
} else if (m == 'f') {
- strncat(pformat, "jd", buf_len);
+ strcat(pformat, "jd");
printf(pformat, (intmax_t) (statfsbuf->f_bfree));
} else if (m == 'a') {
- strncat(pformat, "jd", buf_len);
+ strcat(pformat, "jd");
printf(pformat, (intmax_t) (statfsbuf->f_bavail));
} else if (m == 's' || m == 'S') {
- strncat(pformat, "lu", buf_len);
+ strcat(pformat, "lu");
printf(pformat, (unsigned long) (statfsbuf->f_bsize));
} else if (m == 'c') {
- strncat(pformat, "jd", buf_len);
+ strcat(pformat, "jd");
printf(pformat, (intmax_t) (statfsbuf->f_files));
} else if (m == 'd') {
- strncat(pformat, "jd", buf_len);
+ strcat(pformat, "jd");
printf(pformat, (intmax_t) (statfsbuf->f_ffree));
#if ENABLE_SELINUX
} else if (m == 'C' && (option_mask32 & OPT_SELINUX)) {
- strncat(pformat, "s", buf_len);
- printf(scontext);
+ printfs(pformat, scontext);
#endif
} else {
- strncat(pformat, "c", buf_len);
+ strcatc(pformat, 'c');
printf(pformat, m);
}
}
/* print stat info */
-static void print_stat(char *pformat, const size_t buf_len, const char m,
- const char *const filename, void const *data
- USE_SELINUX(, security_context_t scontext))
+static void print_stat(char *pformat, const char m,
+ const char *const filename, const void *data
+ USE_SELINUX(, security_context_t scontext))
{
#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
struct stat *statbuf = (struct stat *) data;
@@ -177,131 +191,118 @@ static void print_stat(char *pformat, const size_t buf_len, const char m,
struct group *gw_ent;
if (m == 'n') {
- strncat(pformat, "s", buf_len);
- printf(pformat, filename);
+ printfs(pformat, filename);
} else if (m == 'N') {
- strncat(pformat, "s", buf_len);
+ strcatc(pformat, 's');
if (S_ISLNK(statbuf->st_mode)) {
char *linkname = xmalloc_readlink_or_warn(filename);
- if (linkname == NULL) {
- bb_perror_msg("cannot read symbolic link '%s'", filename);
+ if (linkname == NULL)
return;
- }
/*printf("\"%s\" -> \"%s\"", filename, linkname); */
printf(pformat, filename);
printf(" -> ");
printf(pformat, linkname);
+ free(linkname);
} else {
printf(pformat, filename);
}
} else if (m == 'd') {
- strncat(pformat, "ju", buf_len);
+ strcat(pformat, "ju");
printf(pformat, (uintmax_t) statbuf->st_dev);
} else if (m == 'D') {
- strncat(pformat, "jx", buf_len);
+ strcat(pformat, "jx");
printf(pformat, (uintmax_t) statbuf->st_dev);
} else if (m == 'i') {
- strncat(pformat, "ju", buf_len);
+ strcat(pformat, "ju");
printf(pformat, (uintmax_t) statbuf->st_ino);
} else if (m == 'a') {
- strncat(pformat, "lo", buf_len);
+ strcat(pformat, "lo");
printf(pformat, (unsigned long) (statbuf->st_mode & (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO)));
} else if (m == 'A') {
- strncat(pformat, "s", buf_len);
- printf(pformat, bb_mode_string(statbuf->st_mode));
+ printfs(pformat, bb_mode_string(statbuf->st_mode));
} else if (m == 'f') {
- strncat(pformat, "lx", buf_len);
+ strcat(pformat, "lx");
printf(pformat, (unsigned long) statbuf->st_mode);
} else if (m == 'F') {
- strncat(pformat, "s", buf_len);
- printf(pformat, file_type(statbuf));
+ printfs(pformat, file_type(statbuf));
} else if (m == 'h') {
- strncat(pformat, "lu", buf_len);
+ strcat(pformat, "lu");
printf(pformat, (unsigned long) statbuf->st_nlink);
} else if (m == 'u') {
- strncat(pformat, "lu", buf_len);
+ strcat(pformat, "lu");
printf(pformat, (unsigned long) statbuf->st_uid);
} else if (m == 'U') {
- strncat(pformat, "s", buf_len);
setpwent();
pw_ent = getpwuid(statbuf->st_uid);
- printf(pformat, (pw_ent != 0L) ? pw_ent->pw_name : "UNKNOWN");
+ printfs(pformat, (pw_ent != 0L) ? pw_ent->pw_name : "UNKNOWN");
} else if (m == 'g') {
- strncat(pformat, "lu", buf_len);
+ strcat(pformat, "lu");
printf(pformat, (unsigned long) statbuf->st_gid);
} else if (m == 'G') {
- strncat(pformat, "s", buf_len);
setgrent();
gw_ent = getgrgid(statbuf->st_gid);
- printf(pformat, (gw_ent != 0L) ? gw_ent->gr_name : "UNKNOWN");
+ printfs(pformat, (gw_ent != 0L) ? gw_ent->gr_name : "UNKNOWN");
} else if (m == 't') {
- strncat(pformat, "lx", buf_len);
+ strcat(pformat, "lx");
printf(pformat, (unsigned long) major(statbuf->st_rdev));
} else if (m == 'T') {
- strncat(pformat, "lx", buf_len);
+ strcat(pformat, "lx");
printf(pformat, (unsigned long) minor(statbuf->st_rdev));
} else if (m == 's') {
- strncat(pformat, "ju", buf_len);
+ strcat(pformat, "ju");
printf(pformat, (uintmax_t) (statbuf->st_size));
} else if (m == 'B') {
- strncat(pformat, "lu", buf_len);
+ strcat(pformat, "lu");
printf(pformat, (unsigned long) 512); //ST_NBLOCKSIZE
} else if (m == 'b') {
- strncat(pformat, "ju", buf_len);
+ strcat(pformat, "ju");
printf(pformat, (uintmax_t) statbuf->st_blocks);
} else if (m == 'o') {
- strncat(pformat, "lu", buf_len);
+ strcat(pformat, "lu");
printf(pformat, (unsigned long) statbuf->st_blksize);
} else if (m == 'x') {
- strncat(pformat, "s", buf_len);
- printf(pformat, human_time(statbuf->st_atime));
+ printfs(pformat, human_time(statbuf->st_atime));
} else if (m == 'X') {
- strncat(pformat, TYPE_SIGNED(time_t) ? "ld" : "lu", buf_len);
+ strcat(pformat, TYPE_SIGNED(time_t) ? "ld" : "lu");
printf(pformat, (unsigned long) statbuf->st_atime);
} else if (m == 'y') {
- strncat(pformat, "s", buf_len);
- printf(pformat, human_time(statbuf->st_mtime));
+ printfs(pformat, human_time(statbuf->st_mtime));
} else if (m == 'Y') {
- strncat(pformat, TYPE_SIGNED(time_t) ? "ld" : "lu", buf_len);
+ strcat(pformat, TYPE_SIGNED(time_t) ? "ld" : "lu");
printf(pformat, (unsigned long) statbuf->st_mtime);
} else if (m == 'z') {
- strncat(pformat, "s", buf_len);
- printf(pformat, human_time(statbuf->st_ctime));
+ printfs(pformat, human_time(statbuf->st_ctime));
} else if (m == 'Z') {
- strncat(pformat, TYPE_SIGNED(time_t) ? "ld" : "lu", buf_len);
+ strcat(pformat, TYPE_SIGNED(time_t) ? "ld" : "lu");
printf(pformat, (unsigned long) statbuf->st_ctime);
#if ENABLE_SELINUX
} else if (m == 'C' && (option_mask32 & OPT_SELINUX)) {
- strncat(pformat, "s", buf_len);
- printf(pformat, scontext);
+ printfs(pformat, scontext);
#endif
} else {
- strncat(pformat, "c", buf_len);
+ strcatc(pformat, 'c');
printf(pformat, m);
}
}
-static void print_it(char const *masterformat, char const *filename,
- void (*print_func) (char *, size_t, char, char const *, void const *
- USE_SELINUX(, security_context_t scontext)),
- void const *data USE_SELINUX(, security_context_t scontext) )
+static void print_it(const char *masterformat, const char *filename,
+ void (*print_func) (char*, char, const char*, const void* USE_SELINUX(, security_context_t scontext)),
+ const void *data
+ USE_SELINUX(, security_context_t scontext) )
{
- char *b;
-
- /* create a working copy of the format string */
+ /* Create a working copy of the format string */
char *format = xstrdup(masterformat);
-
/* Add 2 to accomodate our conversion of the stat '%s' format string
* to the printf '%llu' one. */
- size_t n_alloc = strlen(format) + 2 + 1;
- char *dest = xmalloc(n_alloc);
+ char *dest = xmalloc(strlen(format) + 2 + 1);
+ char *b;
b = format;
while (b) {
size_t len;
char *p = strchr(b, '%');
if (!p) {
- /* coreutils 6.3 always print <cr> at the end */
+ /* coreutils 6.3 always prints <cr> at the end */
/*fputs(b, stdout);*/
puts(b);
break;
@@ -309,10 +310,11 @@ static void print_it(char const *masterformat, char const *filename,
*p++ = '\0';
fputs(b, stdout);
+ /* dest = "%<modifiers>" */
len = strspn(p, "#-+.I 0123456789");
dest[0] = '%';
memcpy(dest + 1, p, len);
- dest[1 + len] = 0;
+ dest[1 + len] = '\0';
p += len;
b = p + 1;
@@ -324,7 +326,8 @@ static void print_it(char const *masterformat, char const *filename,
bb_putchar('%');
break;
default:
- print_func(dest, n_alloc, *p, filename, data USE_SELINUX(,scontext));
+ /* Completes "%<modifiers>" with specifier and printfs */
+ print_func(dest, *p, filename, data USE_SELINUX(,scontext));
break;
}
}
@@ -335,7 +338,7 @@ static void print_it(char const *masterformat, char const *filename,
#endif
/* Stat the file system and print what we find. */
-static bool do_statfs(char const *filename, char const *format)
+static bool do_statfs(const char *filename, const char *format)
{
struct statfs statfsbuf;
#if ENABLE_SELINUX
@@ -358,7 +361,7 @@ static bool do_statfs(char const *filename, char const *format)
}
#if ENABLE_FEATURE_STAT_FORMAT
- if (format == NULL)
+ if (format == NULL) {
#if !ENABLE_SELINUX
format = (option_mask32 & OPT_TERSE
? "%n %i %l %t %s %b %f %a %c %d\n"
@@ -367,9 +370,8 @@ static bool do_statfs(char const *filename, char const *format)
"Block size: %-10s\n"
"Blocks: Total: %-10b Free: %-10f Available: %a\n"
"Inodes: Total: %-10c Free: %d");
- print_it(format, filename, print_statfs, &statfsbuf USE_SELINUX(, scontext));
#else
- format = (option_mask32 & OPT_TERSE
+ format = (option_mask32 & OPT_TERSE
? (option_mask32 & OPT_SELINUX ? "%n %i %l %t %s %b %f %a %c %d %C\n":
"%n %i %l %t %s %b %f %a %c %d\n")
: (option_mask32 & OPT_SELINUX ?
@@ -385,8 +387,9 @@ static bool do_statfs(char const *filename, char const *format)
"Blocks: Total: %-10b Free: %-10f Available: %a\n"
"Inodes: Total: %-10c Free: %d\n")
);
- print_it(format, filename, print_statfs, &statfsbuf USE_SELINUX(, scontext));
#endif /* SELINUX */
+ }
+ print_it(format, filename, print_statfs, &statfsbuf USE_SELINUX(, scontext));
#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")