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-rw-r--r--ls.c297
1 files changed, 168 insertions, 129 deletions
diff --git a/ls.c b/ls.c
index 450ea1814..f23c1e086 100644
--- a/ls.c
+++ b/ls.c
@@ -1,3 +1,4 @@
+/* vi: set sw=4 ts=4: */
/*
* tiny-ls.c version 0.1.0: A minimalist 'ls'
* Copyright (C) 1996 Brian Candler <B.Candler@pobox.com>
@@ -40,18 +41,18 @@
* 1. requires lstat (BSD) - how do you do it without?
*/
-#define TERMINAL_WIDTH 80 /* use 79 if your terminal has linefold bug */
-#define COLUMN_WIDTH 14 /* default if AUTOWIDTH not defined */
-#define COLUMN_GAP 2 /* includes the file type char, if present */
+#define TERMINAL_WIDTH 80 /* use 79 if your terminal has linefold bug */
+#define COLUMN_WIDTH 14 /* default if AUTOWIDTH not defined */
+#define COLUMN_GAP 2 /* includes the file type char, if present */
#define HAS_REWINDDIR
/************************************************************************/
#include "internal.h"
#if !defined(__GLIBC__) && (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
-# include <linux/types.h>
+# include <linux/types.h>
#else
-# include <sys/types.h>
+# include <sys/types.h>
#endif
#include <sys/stat.h>
#include <stdio.h>
@@ -75,28 +76,28 @@
#endif
#define FMT_AUTO 0
-#define FMT_LONG 1 /* one record per line, extended info */
-#define FMT_SINGLE 2 /* one record per line */
-#define FMT_ROWS 3 /* print across rows */
-#define FMT_COLUMNS 3 /* fill columns (same, since we don't sort) */
+#define FMT_LONG 1 /* one record per line, extended info */
+#define FMT_SINGLE 2 /* one record per line */
+#define FMT_ROWS 3 /* print across rows */
+#define FMT_COLUMNS 3 /* fill columns (same, since we don't sort) */
#define TIME_MOD 0
#define TIME_CHANGE 1
#define TIME_ACCESS 2
-#define DISP_FTYPE 1 /* show character for file type */
-#define DISP_EXEC 2 /* show '*' if regular executable file */
-#define DISP_HIDDEN 4 /* show files starting . (except . and ..) */
-#define DISP_DOT 8 /* show . and .. */
-#define DISP_NUMERIC 16 /* numeric uid and gid */
-#define DISP_FULLTIME 32 /* show extended time display */
-#define DIR_NOLIST 64 /* show directory as itself, not contents */
-#define DISP_DIRNAME 128 /* show directory name (for internal use) */
-#define DIR_RECURSE 256 /* -R (not yet implemented) */
+#define DISP_FTYPE 1 /* show character for file type */
+#define DISP_EXEC 2 /* show '*' if regular executable file */
+#define DISP_HIDDEN 4 /* show files starting . (except . and ..) */
+#define DISP_DOT 8 /* show . and .. */
+#define DISP_NUMERIC 16 /* numeric uid and gid */
+#define DISP_FULLTIME 32 /* show extended time display */
+#define DIR_NOLIST 64 /* show directory as itself, not contents */
+#define DISP_DIRNAME 128 /* show directory name (for internal use) */
+#define DIR_RECURSE 256 /* -R (not yet implemented) */
-static unsigned char display_fmt = FMT_AUTO;
-static unsigned short opts = 0;
-static unsigned short column = 0;
+static unsigned char display_fmt = FMT_AUTO;
+static unsigned short opts = 0;
+static unsigned short column = 0;
#ifdef BB_FEATURE_AUTOWIDTH
static unsigned short terminal_width = 0, column_width = 0;
@@ -113,13 +114,14 @@ static unsigned char time_fmt = TIME_MOD;
static void writenum(long val, short minwidth)
{
- char scratch[128];
+ char scratch[128];
char *p = scratch + sizeof(scratch);
short len = 0;
short neg = (val < 0);
-
- if (neg) val = -val;
+
+ if (neg)
+ val = -val;
do
*--p = (val % 10) + '0', len++, val /= 10;
while (val);
@@ -142,8 +144,9 @@ static void newline(void)
static void tab(short col)
{
static const char spaces[] = " ";
- #define nspaces ((sizeof spaces)-1) /* null terminator! */
-
+
+#define nspaces ((sizeof spaces)-1) /* null terminator! */
+
short n = col - column;
if (n > 0) {
@@ -155,7 +158,7 @@ static void tab(short col)
/* must be 1...(sizeof spaces) left */
wr(spaces, n);
}
- #undef nspaces
+#undef nspaces
}
#ifdef BB_FEATURE_LS_FILETYPES
@@ -163,8 +166,8 @@ static char append_char(mode_t mode)
{
if (!(opts & DISP_FTYPE))
return '\0';
- if ((opts & DISP_EXEC) && S_ISREG(mode) && (mode & (S_IXUSR|S_IXGRP|S_IXOTH)))
- return '*';
+ if ((opts & DISP_EXEC) && S_ISREG(mode)
+ && (mode & (S_IXUSR | S_IXGRP | S_IXOTH))) return '*';
return APPCHAR(mode);
}
#endif
@@ -176,89 +179,93 @@ static char append_char(mode_t mode)
**
**/
-static void list_single(const char *name, struct stat *info, const char *fullname)
+static void list_single(const char *name, struct stat *info,
+ const char *fullname)
{
char scratch[PATH_MAX + 1];
short len = strlen(name);
+
#ifdef BB_FEATURE_LS_FILETYPES
char append = append_char(info->st_mode);
#endif
-
+
if (display_fmt == FMT_LONG) {
- mode_t mode = info->st_mode;
+ mode_t mode = info->st_mode;
+
newline();
wr(modeString(mode), 10);
- column=10;
- writenum((long)info->st_nlink,(short)5);
+ column = 10;
+ writenum((long) info->st_nlink, (short) 5);
fputs(" ", stdout);
#ifdef BB_FEATURE_LS_USERNAME
if (!(opts & DISP_NUMERIC)) {
- memset ( scratch, 0, sizeof (scratch));
- my_getpwuid( scratch, info->st_uid);
+ memset(scratch, 0, sizeof(scratch));
+ my_getpwuid(scratch, info->st_uid);
if (*scratch) {
- fputs(scratch, stdout);
- if ( strlen( scratch) <= 8 )
- wr(" ", 9-strlen( scratch));
- }
- else {
- writenum((long) info->st_uid,(short)8);
+ fputs(scratch, stdout);
+ if (strlen(scratch) <= 8)
+ wr(" ", 9 - strlen(scratch));
+ } else {
+ writenum((long) info->st_uid, (short) 8);
fputs(" ", stdout);
}
} else
#endif
{
- writenum((long) info->st_uid,(short)8);
- fputs(" ", stdout);
+ writenum((long) info->st_uid, (short) 8);
+ fputs(" ", stdout);
}
#ifdef BB_FEATURE_LS_USERNAME
if (!(opts & DISP_NUMERIC)) {
- memset ( scratch, 0, sizeof (scratch));
- my_getgrgid( scratch, info->st_gid);
+ memset(scratch, 0, sizeof(scratch));
+ my_getgrgid(scratch, info->st_gid);
if (*scratch) {
- fputs(scratch, stdout);
- if ( strlen( scratch) <= 8 )
- wr(" ", 8-strlen( scratch));
- }
- else
- writenum((long) info->st_gid,(short)8);
+ fputs(scratch, stdout);
+ if (strlen(scratch) <= 8)
+ wr(" ", 8 - strlen(scratch));
+ } else
+ writenum((long) info->st_gid, (short) 8);
} else
#endif
- writenum((long) info->st_gid,(short)8);
+ writenum((long) info->st_gid, (short) 8);
//tab(26);
if (S_ISBLK(mode) || S_ISCHR(mode)) {
- writenum((long)MAJOR(info->st_rdev),(short)3);
+ writenum((long) MAJOR(info->st_rdev), (short) 3);
fputs(", ", stdout);
- writenum((long)MINOR(info->st_rdev),(short)3);
- }
- else
- writenum((long)info->st_size,(short)8);
+ writenum((long) MINOR(info->st_rdev), (short) 3);
+ } else
+ writenum((long) info->st_size, (short) 8);
fputs(" ", stdout);
//tab(32);
#ifdef BB_FEATURE_LS_TIMESTAMPS
{
time_t cal;
char *string;
-
- switch(time_fmt) {
+
+ switch (time_fmt) {
case TIME_CHANGE:
- cal=info->st_ctime; break;
+ cal = info->st_ctime;
+ break;
case TIME_ACCESS:
- cal=info->st_atime; break;
+ cal = info->st_atime;
+ break;
default:
- cal=info->st_mtime; break;
+ cal = info->st_mtime;
+ break;
}
- string=ctime(&cal);
+ string = ctime(&cal);
if (opts & DISP_FULLTIME)
- wr(string,24);
+ wr(string, 24);
else {
time_t age = time(NULL) - cal;
- wr(string+4,7); /* mmm_dd_ */
- if(age < 3600L*24*365/2 && age > -15*60)
+
+ wr(string + 4, 7); /* mmm_dd_ */
+ if (age < 3600L * 24 * 365 / 2 && age > -15 * 60)
/* hh:mm if less than 6 months old */
- wr(string+11,5);
+ wr(string + 11, 5);
else
/* _yyyy otherwise */
- wr(string+19,5);
+ wr(string + 19, 5);
}
wr(" ", 1);
}
@@ -269,7 +276,8 @@ static void list_single(const char *name, struct stat *info, const char *fullnam
if (S_ISLNK(mode)) {
wr(" -> ", 4);
len = readlink(fullname, scratch, sizeof scratch);
- if (len > 0) fwrite(scratch, 1, len, stdout);
+ if (len > 0)
+ fwrite(scratch, 1, len, stdout);
#ifdef BB_FEATURE_LS_FILETYPES
/* show type of destination */
if (opts & DISP_FTYPE) {
@@ -287,18 +295,17 @@ static void list_single(const char *name, struct stat *info, const char *fullnam
#endif
} else {
static short nexttab = 0;
-
+
/* sort out column alignment */
- if (column == 0)
- ; /* nothing to do */
+ if (column == 0); /* nothing to do */
else if (display_fmt == FMT_SINGLE)
newline();
else {
if (nexttab + column_width > terminal_width
#ifndef BB_FEATURE_AUTOWIDTH
- || nexttab + len >= terminal_width
+ || nexttab + len >= terminal_width
#endif
- )
+ )
newline();
else
tab(nexttab);
@@ -336,32 +343,33 @@ static int list_item(const char *name)
struct stat info;
DIR *dir;
struct dirent *entry;
- char fullname[MAXNAMLEN+1], *fnend;
-
+ char fullname[MAXNAMLEN + 1], *fnend;
+
if (lstat(name, &info))
goto listerr;
-
- if (!S_ISDIR(info.st_mode) ||
- (opts & DIR_NOLIST)) {
+
+ if (!S_ISDIR(info.st_mode) || (opts & DIR_NOLIST)) {
list_single(name, &info, name);
return 0;
}
/* Otherwise, it's a directory we want to list the contents of */
- if (opts & DISP_DIRNAME) { /* identify the directory */
+ if (opts & DISP_DIRNAME) { /* identify the directory */
if (column)
wr("\n\n", 2), column = 0;
wr(name, strlen(name));
wr(":\n", 2);
}
-
+
dir = opendir(name);
- if (!dir) goto listerr;
+ if (!dir)
+ goto listerr;
#ifdef BB_FEATURE_AUTOWIDTH
column_width = 0;
while ((entry = readdir(dir)) != NULL) {
short w = strlen(entry->d_name);
+
if (column_width < w)
column_width = w;
}
@@ -370,39 +378,40 @@ static int list_item(const char *name)
#else
closedir(dir);
dir = opendir(name);
- if (!dir) goto listerr;
+ if (!dir)
+ goto listerr;
#endif
#endif
/* List the contents */
-
- strcpy(fullname,name); /* *** ignore '.' by itself */
- fnend=fullname+strlen(fullname);
+
+ strcpy(fullname, name); /* *** ignore '.' by itself */
+ fnend = fullname + strlen(fullname);
if (fnend[-1] != '/')
*fnend++ = '/';
-
+
while ((entry = readdir(dir)) != NULL) {
- const char *en=entry->d_name;
+ const char *en = entry->d_name;
+
if (en[0] == '.') {
- if (!en[1] || (en[1] == '.' && !en[2])) { /* . or .. */
+ if (!en[1] || (en[1] == '.' && !en[2])) { /* . or .. */
if (!(opts & DISP_DOT))
continue;
- }
- else if (!(opts & DISP_HIDDEN))
+ } else if (!(opts & DISP_HIDDEN))
continue;
}
/* FIXME: avoid stat if not required */
strcpy(fnend, entry->d_name);
if (lstat(fullname, &info))
- goto direrr; /* (shouldn't fail) */
+ goto direrr; /* (shouldn't fail) */
list_single(entry->d_name, &info, fullname);
}
closedir(dir);
return 0;
-direrr:
- closedir(dir);
-listerr:
+ direrr:
+ closedir(dir);
+ listerr:
newline();
perror(name);
return 1;
@@ -432,50 +441,79 @@ static const char ls_usage[] = "ls [-1a"
#endif
"] [filenames...]\n";
-extern int
-ls_main(int argc, char * * argv)
+extern int ls_main(int argc, char **argv)
{
- int argi=1, i;
-
+ int argi = 1, i;
+
/* process options */
while (argi < argc && argv[argi][0] == '-') {
const char *p = &argv[argi][1];
-
- if (!*p) goto print_usage_message; /* "-" by itself not allowed */
+
+ if (!*p)
+ goto print_usage_message; /* "-" by itself not allowed */
if (*p == '-') {
- if (!p[1]) { /* "--" forces end of options */
+ if (!p[1]) { /* "--" forces end of options */
argi++;
break;
}
/* it's a long option name - we don't support them */
goto print_usage_message;
}
-
+
while (*p)
switch (*p++) {
- case 'l': display_fmt = FMT_LONG; break;
- case '1': display_fmt = FMT_SINGLE; break;
- case 'x': display_fmt = FMT_ROWS; break;
- case 'C': display_fmt = FMT_COLUMNS; break;
+ case 'l':
+ display_fmt = FMT_LONG;
+ break;
+ case '1':
+ display_fmt = FMT_SINGLE;
+ break;
+ case 'x':
+ display_fmt = FMT_ROWS;
+ break;
+ case 'C':
+ display_fmt = FMT_COLUMNS;
+ break;
#ifdef BB_FEATURE_LS_FILETYPES
- case 'p': opts |= DISP_FTYPE; break;
- case 'F': opts |= DISP_FTYPE|DISP_EXEC; break;
+ case 'p':
+ opts |= DISP_FTYPE;
+ break;
+ case 'F':
+ opts |= DISP_FTYPE | DISP_EXEC;
+ break;
#endif
- case 'A': opts |= DISP_HIDDEN; break;
- case 'a': opts |= DISP_HIDDEN|DISP_DOT; break;
- case 'n': opts |= DISP_NUMERIC; break;
- case 'd': opts |= DIR_NOLIST; break;
+ case 'A':
+ opts |= DISP_HIDDEN;
+ break;
+ case 'a':
+ opts |= DISP_HIDDEN | DISP_DOT;
+ break;
+ case 'n':
+ opts |= DISP_NUMERIC;
+ break;
+ case 'd':
+ opts |= DIR_NOLIST;
+ break;
#ifdef FEATURE_RECURSIVE
- case 'R': opts |= DIR_RECURSE; break;
+ case 'R':
+ opts |= DIR_RECURSE;
+ break;
#endif
#ifdef BB_FEATURE_LS_TIMESTAMPS
- case 'u': time_fmt = TIME_ACCESS; break;
- case 'c': time_fmt = TIME_CHANGE; break;
- case 'e': opts |= DISP_FULLTIME; break;
+ case 'u':
+ time_fmt = TIME_ACCESS;
+ break;
+ case 'c':
+ time_fmt = TIME_CHANGE;
+ break;
+ case 'e':
+ opts |= DISP_FULLTIME;
+ break;
#endif
- default: goto print_usage_message;
+ default:
+ goto print_usage_message;
}
-
+
argi++;
}
@@ -483,29 +521,30 @@ ls_main(int argc, char * * argv)
if (display_fmt == FMT_AUTO)
display_fmt = isatty(fileno(stdout)) ? FMT_COLUMNS : FMT_SINGLE;
if (argi < argc - 1)
- opts |= DISP_DIRNAME; /* 2 or more items? label directories */
+ opts |= DISP_DIRNAME; /* 2 or more items? label directories */
#ifdef BB_FEATURE_AUTOWIDTH
/* could add a -w option and/or TIOCGWINSZ call */
- if (terminal_width < 1) terminal_width = TERMINAL_WIDTH;
-
+ if (terminal_width < 1)
+ terminal_width = TERMINAL_WIDTH;
+
for (i = argi; i < argc; i++) {
int len = strlen(argv[i]);
+
if (column_width < len)
column_width = len;
}
#endif
/* process files specified, or current directory if none */
- i=0;
+ i = 0;
if (argi == argc)
i = list_item(".");
while (argi < argc)
i |= list_item(argv[argi++]);
newline();
- exit( i);
+ exit(i);
-print_usage_message:
- usage (ls_usage);
- exit( FALSE);
+ print_usage_message:
+ usage(ls_usage);
+ exit(FALSE);
}
-
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 05:59:52 +0000