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util, core: add support for ephemeral status lines

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Ephemeral status lines do not end with a newline and they expect to be
overwritten by the next printed status line.
This commit is contained in:
Michal Schmidt
2013-02-28 02:23:27 +01:00
parent 297d0749dd
commit 984a2be450
5 changed files with 18 additions and 11 deletions
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src/shared/util.c
+11 -5
View File
@@ -2859,12 +2859,13 @@ cpu_set_t* cpu_set_malloc(unsigned *ncpus) {
}
}
int status_vprintf(const char *status, bool ellipse, const char *format, va_list ap) {
int status_vprintf(const char *status, bool ellipse, bool ephemeral, 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[5];
struct iovec iovec[6];
int n = 0;
static bool prev_ephemeral;
assert(format);
@@ -2902,6 +2903,10 @@ int status_vprintf(const char *status, bool ellipse, const char *format, va_list
zero(iovec);
if (prev_ephemeral)
IOVEC_SET_STRING(iovec[n++], "\r" ANSI_ERASE_TO_END_OF_LINE);
prev_ephemeral = ephemeral;
if (status) {
if (!isempty(status)) {
IOVEC_SET_STRING(iovec[n++], "[");
@@ -2912,7 +2917,8 @@ int status_vprintf(const char *status, bool ellipse, const char *format, va_list
}
IOVEC_SET_STRING(iovec[n++], s);
IOVEC_SET_STRING(iovec[n++], "\n");
if (!ephemeral)
IOVEC_SET_STRING(iovec[n++], "\n");
if (writev(fd, iovec, n) < 0)
return -errno;
@@ -2920,14 +2926,14 @@ int status_vprintf(const char *status, bool ellipse, const char *format, va_list
return 0;
}
int status_printf(const char *status, bool ellipse, const char *format, ...) {
int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) {
va_list ap;
int r;
assert(format);
va_start(ap, format);
r = status_vprintf(status, ellipse, format, ap);
r = status_vprintf(status, ellipse, ephemeral, format, ap);
va_end(ap);
return r;
src/shared/util.h
+3 -2
View File
@@ -59,6 +59,7 @@ union dirent_storage {
#define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m"
#define ANSI_HIGHLIGHT_YELLOW_ON "\x1B[1;33m"
#define ANSI_HIGHLIGHT_OFF "\x1B[0m"
#define ANSI_ERASE_TO_END_OF_LINE "\x1B[K"
size_t page_size(void);
#define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
@@ -354,8 +355,8 @@ int pipe_eof(int fd);
cpu_set_t* cpu_set_malloc(unsigned *ncpus);
int status_vprintf(const char *status, bool ellipse, const char *format, va_list ap);
int status_printf(const char *status, bool ellipse, const char *format, ...);
int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap);
int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...);
int status_welcome(void);
int fd_columns(int fd);