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-rw-r--r--toys/ls.c113
1 files changed, 113 insertions, 0 deletions
diff --git a/toys/ls.c b/toys/ls.c
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index 00000000..b9b963ac
--- /dev/null
+++ b/toys/ls.c
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+/* vi: set sw=4 ts=4:
+ *
+ * ls.c - list files
+ *
+ * Copyright 2012 Andre Renaud <andre@bluewatersys.com>
+ *
+ * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ls.htm
+
+USE_LS(NEWTOY(ls, "F1a", TOYFLAG_USR|TOYFLAG_BIN))
+
+config LS
+ bool "ls"
+ default y
+ help
+ usage: ls [-F] [-a] [-1] [directory...]
+ list files
+
+ -F append a character as a file type indicator
+ -a list all files
+ -1 list one file per line
+*/
+
+#include "toys.h"
+
+#define FLAG_a 1
+#define FLAG_1 2
+#define FLAG_F 4
+
+static int dir_filter(const struct dirent *d)
+{
+ /* Skip over the . & .. entries unless -a is given */
+ if (!(toys.optflags & FLAG_a))
+ if (d->d_name[0] == '.')
+ return 0;
+ return 1;
+}
+
+static void do_ls(int fd, char *name)
+{
+ struct dirent **entries;
+ int nentries;
+ int i;
+ int maxwidth = -1;
+ int ncolumns;
+
+ if (strcmp(name, "-") == 0)
+ name = ".";
+
+ nentries = scandir(name, &entries, dir_filter, alphasort);
+ if (nentries < 0)
+ perror_exit("ls: cannot access %s'", name);
+
+
+ /* Determine the widest entry so we can flow them properly */
+ if (!(toys.optflags & FLAG_1)) {
+ int columns;
+ char *columns_str;
+
+ for (i = 0; i < nentries; i++) {
+ struct dirent *ent = entries[i];
+ int width;
+
+ width = strlen(ent->d_name);
+ if (width > maxwidth)
+ maxwidth = width;
+ }
+ /* We always want at least a single space for each entry */
+ maxwidth++;
+ if (toys.optflags & FLAG_F)
+ maxwidth++;
+
+ columns_str = getenv("COLUMNS");
+ columns = columns_str ? atoi(columns_str) : 80;
+ ncolumns = columns / maxwidth;
+ }
+
+ for (i = 0; i < nentries; i++) {
+ struct dirent *ent = entries[i];
+ int len = strlen(ent->d_name);
+
+ printf("%s", ent->d_name);
+ if (toys.optflags & FLAG_F) {
+ struct stat st;
+ if (stat(ent->d_name, &st))
+ perror_exit("Can't stat %s", ent->d_name);
+ if (S_ISDIR(st.st_mode)) {
+ printf("/");
+ len++;
+ }
+ if (S_ISREG(st.st_mode) &&
+ (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))) {
+ printf("*");
+ len++;
+ }
+ }
+ if (toys.optflags & FLAG_1)
+ printf("\n");
+ else {
+ if (i % ncolumns == ncolumns - 1)
+ printf("\n");
+ else
+ printf("%*s", maxwidth - len, "");
+ }
+ }
+ /* Make sure we put at a trailing new line in */
+ if (!(toys.optflags & FLAG_1) && (i % ncolumns))
+ printf("\n");
+}
+
+void ls_main(void)
+{
+ loopfiles(toys.optargs, do_ls);
+}