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/* SPDX-License-Identifier: LGPL-2.1+ */
#include "alloc-util.h"
#include "fd-util.h"
#include "io-util.h"
#include "parse-util.h"
#include "show-status.h"
#include "string-table.h"
#include "string-util.h"
#include "terminal-util.h"
#include "util.h"
static const char* const show_status_table[_SHOW_STATUS_MAX] = {
[SHOW_STATUS_NO] = "no",
[SHOW_STATUS_AUTO] = "auto",
[SHOW_STATUS_TEMPORARY] = "temporary",
[SHOW_STATUS_YES] = "yes",
};
DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(show_status, ShowStatus, SHOW_STATUS_YES);
int parse_show_status(const char *v, ShowStatus *ret) {
ShowStatus s;
assert(ret);
s = show_status_from_string(v);
if (s < 0 || s == SHOW_STATUS_TEMPORARY)
return -EINVAL;
*ret = s;
return 0;
}
int status_vprintf(const char *status, ShowStatusFlags flags, const char *format, va_list ap) {
static const char status_indent[] = " "; /* "[" STATUS "] " */
_cleanup_free_ char *s = NULL;
_cleanup_close_ int fd = -1;
struct iovec iovec[7] = {};
int n = 0;
static bool prev_ephemeral;
assert(format);
/* This is independent of logging, as status messages are
* optional and go exclusively to the console. */
if (vasprintf(&s, format, ap) < 0)
return log_oom();
/* Before you ask: yes, on purpose we open/close the console for each status line we write individually. This
* is a good strategy to avoid PID 1 getting killed by the kernel's SAK concept (it doesn't fix this entirely,
* but minimizes the time window the kernel might end up killing PID 1 due to SAK). It also makes things easier
* for us so that we don't have to recover from hangups and suchlike triggered on the console. */
fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
if (fd < 0)
return fd;
if (FLAGS_SET(flags, SHOW_STATUS_ELLIPSIZE)) {
char *e;
size_t emax, sl;
int c;
c = fd_columns(fd);
if (c <= 0)
c = 80;
sl = status ? sizeof(status_indent)-1 : 0;
emax = c - sl - 1;
if (emax < 3)
emax = 3;
e = ellipsize(s, emax, 50);
if (e)
free_and_replace(s, e);
}
if (prev_ephemeral)
iovec[n++] = IOVEC_MAKE_STRING(ANSI_REVERSE_LINEFEED "\r" ANSI_ERASE_TO_END_OF_LINE);
if (status) {
if (!isempty(status)) {
iovec[n++] = IOVEC_MAKE_STRING("[");
iovec[n++] = IOVEC_MAKE_STRING(status);
iovec[n++] = IOVEC_MAKE_STRING("] ");
} else
iovec[n++] = IOVEC_MAKE_STRING(status_indent);
}
iovec[n++] = IOVEC_MAKE_STRING(s);
iovec[n++] = IOVEC_MAKE_STRING("\n");
if (prev_ephemeral && !FLAGS_SET(flags, SHOW_STATUS_EPHEMERAL))
iovec[n++] = IOVEC_MAKE_STRING(ANSI_ERASE_TO_END_OF_LINE);
prev_ephemeral = FLAGS_SET(flags, SHOW_STATUS_EPHEMERAL) ;
if (writev(fd, iovec, n) < 0)
return -errno;
return 0;
}
int status_printf(const char *status, ShowStatusFlags flags, const char *format, ...) {
va_list ap;
int r;
assert(format);
va_start(ap, format);
r = status_vprintf(status, flags, format, ap);
va_end(ap);
return r;
}
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