11a1589223
Files which are installed as-is (any .service and other unit files, .conf files, .policy files, etc), are left as is. My assumption is that SPDX identifiers are not yet that well known, so it's better to retain the extended header to avoid any doubt. I also kept any copyright lines. We can probably remove them, but it'd nice to obtain explicit acks from all involved authors before doing that.
118 lines
3.3 KiB
C
118 lines
3.3 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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This file is part of systemd.
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Copyright 2014 Lennart Poettering
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***/
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#include "alloc-util.h"
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#include "fd-util.h"
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#include "io-util.h"
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#include "parse-util.h"
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#include "show-status.h"
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#include "string-util.h"
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#include "terminal-util.h"
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#include "util.h"
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int parse_show_status(const char *v, ShowStatus *ret) {
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int r;
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assert(v);
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assert(ret);
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if (streq(v, "auto")) {
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*ret = SHOW_STATUS_AUTO;
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return 0;
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}
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r = parse_boolean(v);
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if (r < 0)
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return r;
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*ret = r ? SHOW_STATUS_YES : SHOW_STATUS_NO;
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return 0;
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}
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int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) {
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static const char status_indent[] = " "; /* "[" STATUS "] " */
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_cleanup_free_ char *s = NULL;
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_cleanup_close_ int fd = -1;
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struct iovec iovec[6] = {};
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int n = 0;
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static bool prev_ephemeral;
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assert(format);
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/* This is independent of logging, as status messages are
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* optional and go exclusively to the console. */
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if (vasprintf(&s, format, ap) < 0)
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return log_oom();
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/* Before you ask: yes, on purpose we open/close the console for each status line we write individually. This
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* is a good strategy to avoid PID 1 getting killed by the kernel's SAK concept (it doesn't fix this entirely,
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* but minimizes the time window the kernel might end up killing PID 1 due to SAK). It also makes things easier
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* for us so that we don't have to recover from hangups and suchlike triggered on the console. */
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fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
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if (fd < 0)
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return fd;
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if (ellipse) {
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char *e;
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size_t emax, sl;
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int c;
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c = fd_columns(fd);
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if (c <= 0)
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c = 80;
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sl = status ? sizeof(status_indent)-1 : 0;
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emax = c - sl - 1;
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if (emax < 3)
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emax = 3;
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e = ellipsize(s, emax, 50);
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if (e) {
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free(s);
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s = e;
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}
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}
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if (prev_ephemeral)
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iovec[n++] = IOVEC_MAKE_STRING("\r" ANSI_ERASE_TO_END_OF_LINE);
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prev_ephemeral = ephemeral;
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if (status) {
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if (!isempty(status)) {
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iovec[n++] = IOVEC_MAKE_STRING("[");
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iovec[n++] = IOVEC_MAKE_STRING(status);
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iovec[n++] = IOVEC_MAKE_STRING("] ");
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} else
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iovec[n++] = IOVEC_MAKE_STRING(status_indent);
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}
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iovec[n++] = IOVEC_MAKE_STRING(s);
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if (!ephemeral)
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iovec[n++] = IOVEC_MAKE_STRING("\n");
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if (writev(fd, iovec, n) < 0)
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return -errno;
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return 0;
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}
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int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) {
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va_list ap;
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int r;
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assert(format);
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va_start(ap, format);
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r = status_vprintf(status, ellipse, ephemeral, format, ap);
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va_end(ap);
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return r;
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}
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