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Factor out ls_format(), comments

This commit is contained in:
Přemysl Eric Janouch 2017-07-15 22:18:45 +02:00
parent 53ab5290e0
commit 0cf63744a7
Signed by: p
GPG Key ID: B715679E3A361BE6
1 changed files with 61 additions and 49 deletions
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110
sdn.cpp
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@ -318,6 +318,60 @@ static struct {
map<string, chtype> ls_exts; // LS_COLORS file extensions
} g;
fun ls_format (const string &filename, const struct stat &info) -> chtype {
int type = LS_ORPHAN;
auto set = [&](int t) { if (g.ls_colors.count (t)) type = t; };
// TODO: LS_MISSING if available and this is a missing symlink target
// TODO: go by readdir() information when stat() isn't available yet
if (S_ISREG (info.st_mode)) {
type = LS_FILE;
if (info.st_nlink > 1)
set (LS_MULTIHARDLINK);
if ((info.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
set (LS_EXECUTABLE);
if (lgetxattr (filename.c_str (), "security.capability", NULL, 0) >= 0)
set (LS_CAPABILITY);
if ((info.st_mode & S_ISGID))
set (LS_SETGID);
if ((info.st_mode & S_ISUID))
set (LS_SETUID);
} else if (S_ISDIR (info.st_mode)) {
type = LS_DIRECTORY;
if ((info.st_mode & S_ISVTX))
set (LS_STICKY);
if ((info.st_mode & S_IWOTH))
set (LS_OTHER_WRITABLE);
if ((info.st_mode & S_ISVTX) && (info.st_mode & S_IWOTH))
set (LS_STICKY_OTHER_WRITABLE);
} else if (S_ISLNK (info.st_mode)) {
// TODO: LS_ORPHAN when symlink target is missing and either
// a/ "li" is "target", or
// b/ LS_ORPHAN is available
type = LS_SYMLINK;
} else if (S_ISFIFO (info.st_mode)) {
type = LS_FIFO;
} else if (S_ISSOCK (info.st_mode)) {
type = LS_SOCKET;
} else if (S_ISBLK (info.st_mode)) {
type = LS_BLOCK;
} else if (S_ISCHR (info.st_mode)) {
type = LS_CHARACTER;
}
chtype format = 0;
const auto x = g.ls_colors.find (type);
if (x != g.ls_colors.end ())
format = x->second;
auto dot = filename.find_last_of ('.');
if (dot != string::npos && type == LS_FILE) {
const auto x = g.ls_exts.find (filename.substr (++dot));
if (x != g.ls_exts.end ())
format = x->second;
}
return format;
}
// XXX: this will probably have to be changed to make_entry and run lstat itself
fun make_row (const string &filename, const struct stat &info) -> row {
row r;
@ -353,55 +407,8 @@ fun make_row (const string &filename, const struct stat &info) -> row {
(tm->tm_year == now_year) ? "%b %e %H:%M" : "%b %e %Y", tm);
r.cols[row::MTIME] = apply_attrs (to_wide (buf), 0);
int type = LS_ORPHAN;
auto set = [&](int t) { if (g.ls_colors.count (t)) type = t; };
// TODO: LS_MISSING
if (S_ISREG (info.st_mode)) {
type = LS_FILE;
if (info.st_nlink > 1)
set (LS_MULTIHARDLINK);
if ((info.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
set (LS_EXECUTABLE);
if (lgetxattr (filename.c_str (), "security.capability", NULL, 0) >= 0)
set (LS_CAPABILITY);
if ((info.st_mode & S_ISGID))
set (LS_SETGID);
if ((info.st_mode & S_ISUID))
set (LS_SETUID);
} else if (S_ISDIR (info.st_mode)) {
type = LS_DIRECTORY;
if ((info.st_mode & S_ISVTX))
set (LS_STICKY);
if ((info.st_mode & S_IWOTH))
set (LS_OTHER_WRITABLE);
if ((info.st_mode & S_ISVTX) && (info.st_mode & S_IWOTH))
set (LS_STICKY_OTHER_WRITABLE);
} else if (S_ISLNK (info.st_mode)) {
// TODO: LS_ORPHAN
type = LS_SYMLINK;
} else if (S_ISFIFO (info.st_mode)) {
type = LS_FIFO;
} else if (S_ISSOCK (info.st_mode)) {
type = LS_SOCKET;
} else if (S_ISBLK (info.st_mode)) {
type = LS_BLOCK;
} else if (S_ISCHR (info.st_mode)) {
type = LS_CHARACTER;
}
chtype format = 0;
const auto x = g.ls_colors.find (type);
if (x != g.ls_colors.end ())
format = x->second;
auto dot = filename.find_last_of ('.');
if (dot != string::npos && type == LS_FILE) {
const auto x = g.ls_exts.find (filename.substr (++dot));
if (x != g.ls_exts.end ())
format = x->second;
}
// TODO: show symlink target
// TODO: show symlink target: check st_mode/DT_*, readlink
auto format = ls_format (filename, info);
r.cols[row::FILENAME] = apply_attrs (to_wide (filename), format);
return r;
}
@ -462,6 +469,10 @@ fun reload () {
if (f->d_name == string ("."))
continue;
// TODO: check lstat() return value
// TODO: benchmark just readdir() vs. lstat(), also on dead mounts;
// it might make sense to stat asynchronously in threads
// http://lkml.iu.edu/hypermail//linux/kernel/0804.3/1616.html
struct stat sb = {};
lstat (f->d_name, &sb);
g.entries.push_back ({ f->d_name, sb, make_row (f->d_name, sb) });
@ -527,6 +538,7 @@ fun handle_editor (wint_t c, bool is_char) {
fun choose (const entry &entry) -> bool {
bool is_dir = S_ISDIR (entry.info.st_mode) != 0;
// Dive into directories and accessible symlinks to them
// TODO: we probably want to use a preread readlink value
if (S_ISLNK (entry.info.st_mode)) {
char buf[PATH_MAX];
struct stat sb = {};