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-rw-r--r--libsmartcols/samples/tree.c249
1 files changed, 249 insertions, 0 deletions
diff --git a/libsmartcols/samples/tree.c b/libsmartcols/samples/tree.c
new file mode 100644
index 0000000..fcb1751
--- /dev/null
+++ b/libsmartcols/samples/tree.c
@@ -0,0 +1,249 @@
+/*
+ * Copyright (C) 2010-2014 Karel Zak <kzak@redhat.com>
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ */
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <getopt.h>
+
+#include "c.h"
+#include "nls.h"
+#include "strutils.h"
+
+#include "libsmartcols.h"
+
+static int add_children(struct libscols_table *tb,
+ struct libscols_line *ln, int fd);
+
+
+enum { COL_MODE, COL_SIZE, COL_NAME };
+
+/* add columns to the @tb */
+static void setup_columns(struct libscols_table *tb, int notree)
+{
+ if (!scols_table_new_column(tb, "MODE", 0.3, 0))
+ goto fail;
+ if (!scols_table_new_column(tb, "SIZE", 5, SCOLS_FL_RIGHT))
+ goto fail;
+ if (!scols_table_new_column(tb, "NAME", 0.5,
+ (notree ? 0 : SCOLS_FL_TREE) | SCOLS_FL_NOEXTREMES))
+ goto fail;
+
+ return;
+fail:
+ scols_unref_table(tb);
+ err(EXIT_FAILURE, "failed to create output columns");
+}
+
+/* add a new line to @tb, the content is based on @st */
+static int add_line_from_stat(struct libscols_table *tb,
+ struct libscols_line *parent,
+ int parent_fd,
+ struct stat *st,
+ const char *name)
+{
+ struct libscols_line *ln;
+ char modbuf[11], *p;
+ mode_t mode = st->st_mode;
+ int rc = 0;
+
+ ln = scols_table_new_line(tb, parent);
+ if (!ln)
+ err(EXIT_FAILURE, "failed to create output line");
+
+ /* MODE; local buffer, use scols_line_set_data() that calls strdup() */
+ xstrmode(mode, modbuf);
+ if (scols_line_set_data(ln, COL_MODE, modbuf))
+ goto fail;
+
+ /* SIZE; already allocated string, use scols_line_refer_data() */
+ p = size_to_human_string(0, st->st_size);
+ if (!p || scols_line_refer_data(ln, COL_SIZE, p))
+ goto fail;
+
+ /* NAME */
+ if (scols_line_set_data(ln, COL_NAME, name))
+ goto fail;
+
+ /* colors */
+ if (scols_table_colors_wanted(tb)) {
+ struct libscols_cell *ce = scols_line_get_cell(ln, COL_NAME);
+
+ if (S_ISDIR(mode))
+ scols_cell_set_color(ce, "blue");
+ else if (S_ISLNK(mode))
+ scols_cell_set_color(ce, "cyan");
+ else if (S_ISBLK(mode))
+ scols_cell_set_color(ce, "magenta");
+ else if ((mode & S_IXOTH) || (mode & S_IXGRP) || (mode & S_IXUSR))
+ scols_cell_set_color(ce, "green");
+ }
+
+ if (S_ISDIR(st->st_mode)) {
+ int fd;
+
+ if (parent_fd >= 0)
+ fd = openat(parent_fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC);
+ else
+ fd = open(name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC);
+ if (fd >= 0) {
+ rc = add_children(tb, ln, fd);
+ close(fd);
+ }
+ }
+ return rc;
+fail:
+ err(EXIT_FAILURE, "failed to create cell data");
+ return -1;
+}
+
+/* read all entries from directory addressed by @fd */
+static int add_children(struct libscols_table *tb,
+ struct libscols_line *ln,
+ int fd)
+{
+ DIR *dir;
+ struct dirent *d;
+
+ dir = fdopendir(fd);
+ if (!dir)
+ return -errno;
+
+ while ((d = readdir(dir))) {
+ struct stat st;
+
+ if (strcmp(d->d_name, ".") == 0 || strcmp(d->d_name, "..") == 0)
+ continue;
+ if (fstatat(fd, d->d_name, &st, AT_SYMLINK_NOFOLLOW) != 0)
+ continue;
+ add_line_from_stat(tb, ln, fd, &st, d->d_name);
+ }
+ closedir(dir);
+ return 0;
+}
+
+static void add_lines(struct libscols_table *tb, const char *dirname)
+{
+ struct stat st;
+
+ if (lstat(dirname, &st))
+ err(EXIT_FAILURE, "%s", dirname);
+
+ add_line_from_stat(tb, NULL, -1, &st, dirname);
+}
+
+static void __attribute__((__noreturn__)) usage(FILE *out)
+{
+ fprintf(out, " %s [options] [<dir> ...]\n\n", program_invocation_short_name);
+ fputs(" -c, --csv display a csv-like output\n", out);
+ fputs(" -i, --ascii use ascii characters only\n", out);
+ fputs(" -l, --list use list format output\n", out);
+ fputs(" -n, --noheadings don't print headings\n", out);
+ fputs(" -p, --pairs use key=\"value\" output format\n", out);
+ fputs(" -J, --json use JSON output format\n", out);
+ fputs(" -r, --raw use raw output format\n", out);
+ fputs(" -S, --range-start <n> first line to print\n", out);
+ fputs(" -E, --range-end <n> last line to print\n", out);
+
+ exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
+}
+
+int main(int argc, char *argv[])
+{
+ struct libscols_table *tb;
+ int c, notree = 0, nstart = -1, nend = -1;
+
+
+ static const struct option longopts[] = {
+ { "ascii", 0, NULL, 'i' },
+ { "csv", 0, NULL, 'c' },
+ { "list", 0, NULL, 'l' },
+ { "noheadings", 0, NULL, 'n' },
+ { "pairs", 0, NULL, 'p' },
+ { "json", 0, NULL, 'J' },
+ { "raw", 0, NULL, 'r' },
+ { "range-start",1, NULL, 'S' },
+ { "range-end", 1, NULL, 'E' },
+ { NULL, 0, NULL, 0 },
+ };
+
+ setlocale(LC_ALL, ""); /* just to have enable UTF8 chars */
+
+ scols_init_debug(0);
+
+ tb = scols_new_table();
+ if (!tb)
+ err(EXIT_FAILURE, "failed to create output table");
+
+ while((c = getopt_long(argc, argv, "ciJlnprS:E:", longopts, NULL)) != -1) {
+ switch(c) {
+ case 'c':
+ scols_table_set_column_separator(tb, ",");
+ scols_table_enable_raw(tb, 1);
+ notree = 1;
+ break;
+ case 'i':
+ scols_table_enable_ascii(tb, 1);
+ break;
+ case 'J':
+ scols_table_set_name(tb, "scolstest");
+ scols_table_enable_json(tb, 1);
+ break;
+ case 'l':
+ notree = 1;
+ break;
+ case 'n':
+ scols_table_enable_noheadings(tb, 1);
+ break;
+ case 'p':
+ scols_table_enable_export(tb, 1);
+ notree = 1;
+ break;
+ case 'r':
+ scols_table_enable_raw(tb, 1);
+ notree = 1;
+ break;
+ case 'S':
+ nstart = strtos32_or_err(optarg, "failed to parse range start") - 1;
+ break;
+ case 'E':
+ nend = strtos32_or_err(optarg, "failed to parse range end") - 1;
+ break;
+ default:
+ usage(stderr);
+ }
+ }
+
+ scols_table_enable_colors(tb, isatty(STDOUT_FILENO));
+ setup_columns(tb, notree);
+
+ if (optind == argc)
+ add_lines(tb, ".");
+ else while (optind < argc)
+ add_lines(tb, argv[optind++]);
+
+ if (nstart >= 0 || nend >= 0) {
+ /* print subset */
+ struct libscols_line *start = NULL, *end = NULL;
+
+ if (nstart >= 0)
+ start = scols_table_get_line(tb, nstart);
+ if (nend >= 0)
+ end = scols_table_get_line(tb, nend);
+
+ if (start || end)
+ scols_table_print_range(tb, start, end);
+ } else
+ /* print all table */
+ scols_print_table(tb);
+
+ scols_unref_table(tb);
+ return EXIT_SUCCESS;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-10 20:03:39 +0000