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/* SPDX-License-Identifier: Apache-2.0 */
/* Copyright 2025 Thorsten Töpper
*
* vim:ts=4:sw=4:expandtab
*/
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include <time.h>
#include <sys/ioctl.h>
#include <errno.h>
#include "output.h"
#include "data_management.h"
#include "options.h"
/* === DEFINITIONS === */
#define out_vsep fputc('|', stdout)
#define out_print_newline() fputc('\n', stdout)
#define out_print_fname(x) printf(" %s ", x->fname)
void out_print_size(struct list_node *ptr);
void out_print_time(time_t tv);
void out_print_time_by_option(struct list_node *ptr);
/* === IMPLEMENTATION === */
inline int fputc_all_cols(char c, FILE *fdout) {
struct winsize terminal;
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &terminal) == -1) {
if (errno != 25) {
LOGERR("ERROR: ioctl(STDOUT_FILENO, TIOCGWINSZ,...) failed: %s (errno %d)\n",
strerror(errno), errno);
}
terminal.ws_col = 72;
}
DBGTRC("DEBUG: terminal.ws_col = %d / terminal.ws_row = %d\n", terminal.ws_col, terminal.ws_row);
/* Somehow not always ws_col == 0, with optimization compiler flags and executed by watch. */
if (terminal.ws_col == 0) {
terminal.ws_col = 72;
}
return fputc_width_x(c, terminal.ws_col, fdout);
}
/* Not the most performant way, but during output the time critical tasks are already done. */
inline int fputc_width_x(char c, size_t x, FILE *fdout) {
size_t i=0;
if (fdout == NULL) {
LOGERR("ERROR: No output stream given.\n");
return EOF;
}
if ( ! isprint(c) ) { c = '?'; }
for (i=0; i<x; i++) {
if (fputc(c, fdout) == EOF) {
LOGERR("ERROR: Failed to write char 0x%02X to stream %d\n", c, fdout->_fileno);
return EOF;
}
}
return 1;
}
/* === FORMATTING RELATED FUNCTIONS === */
inline void out_print_size(struct list_node *ptr) {
printf(" %8ld %2s ", ((ptr->ln_stat.st_size>=1024) ? (ptr->ln_stat.st_size/1024) : ptr->ln_stat.st_size),
((ptr->ln_stat.st_size >= 1024) ? "kB" : ""));
}
inline void out_print_time(time_t tv) {
struct tm *tm = NULL;
char timestamp[128];
tm = localtime(&tv);
if (option_timestamp_long) {
strftime(timestamp, sizeof(timestamp), "%Y%m%d %H:%M:%S %Z", tm);
printf(" %20s ", timestamp);
} else {
strftime(timestamp, sizeof(timestamp), "%H:%M:%S", tm);
printf(" %8s ", timestamp);
}
}
inline void out_print_time_by_option(struct list_node *ptr) {
time_t time_value = 0;
switch (option_time_field) {
case 'm':
time_value = ptr->ln_stat.st_mtim.tv_sec;
break;
case 'a':
time_value = ptr->ln_stat.st_atim.tv_sec;
break;
case 'c':
time_value = ptr->ln_stat.st_ctim.tv_sec;
break;
default:
LOGERR("WARNING: option_time_field has invalid value %c 0x%02X - going by default m\n",
option_time_field, option_time_field);
option_time_field = 'm';
time_value = ptr->ln_stat.st_mtim.tv_sec;
break;
};
out_print_time(time_value);
}
/* === END OF FORMATTING FUNCTIONS === */
/* The most simple default output, formatted output is planned */
void print_list(struct list_head *list) {
struct list_head *lh = list;
struct list_node *ptr;
size_t total_size = 0;
if (list == NULL) return;
if (option_sort_reverse_order) {
lh = create_list_sort_reversed(list);
/* be tolerant */
if (lh == NULL) {
lh = list;
}
}
ptr = lh->first;
while (ptr != NULL) {
out_print_size(ptr);
out_print_time_by_option(ptr);
out_print_fname(ptr);
out_print_newline();
/* Linux: Neither man stat(2) nor stat(3type) declare why struct stat field st_size
* would get a negative value assigned. The type off_t masks __off_t or __off64_t
* which themselves mask bits/types.h __SLONGWORD_TYPE on x86_64 that's long int.
* Haven't checked libc/kernel code but regardless why, I assume that a negative
* value would imply a corrupt filesystem.
*/
total_size += (ptr->ln_stat.st_size>0) ? (unsigned long int)ptr->ln_stat.st_size : 0;
ptr = ptr->next;
}
fputc_all_cols('=', stdout);
printf("\nTotal size: %lu %s\n", ((total_size>1024) ? total_size/1024 : total_size),
((total_size >= 1024) ? "kB" : ""));
if (lh != list) destroy_list(lh);
}
/* For now with a large walk around common format strings and prevention of attack vectors.
* n - name
* s - file size
*
* Time related
* t - timestamp set by option_time_field
* A - timestamp from atim.tv_sec
* C - timestamp from ctim.tv_sec
* M - timestamp from mtim.tv_sec
*/
void print_list_formatted(const char *format, struct list_head *list) {
struct list_head *lh = list;
struct list_node *ptr;
size_t format_len = 0, i = 0;
if (format == NULL || format[0] == '\0') {
LOGERR("ERROR: No format string given");
return;
}
if (list == NULL || list->first == NULL) {
LOGERR("ERROR: No data to print.\n");
return;
}
if (option_sort_reverse_order) {
lh = create_list_sort_reversed(list);
/* be tolerant */
if (lh == NULL) {
lh = list;
}
}
/* Note: the maximum length needs to be adjusted if the strings
* shall contain more complicated settings */
format_len = strnlen(format, 80);
ptr = lh->first;
while (ptr != NULL) {
for (i=0; i < format_len; i++) {
switch (format[i]) {
case 'n':
out_print_fname(ptr);
break;
case 's':
out_print_size(ptr);
break;
case 't':
out_print_time_by_option(ptr);
break;
case 'A':
out_print_time(ptr->ln_stat.st_atim.tv_sec);
break;
case 'C':
out_print_time(ptr->ln_stat.st_ctim.tv_sec);
break;
case 'M':
out_print_time(ptr->ln_stat.st_mtim.tv_sec);
break;
case ' ': /* just ignore this without warning */
break;
default:
LOGERR("WARNING: Invalid character 0x%02X ignoring it\n", format[i]);
break;
};
}
out_print_newline();
ptr = ptr->next;
}
if (lh != list) destroy_list(lh);
}
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