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libbb: make read_cmdline() replace chars 1..31 with '?', not space

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Space was too inconspicuous on output

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2025-08-06 14:02:05 +02:00
parent 8bde71eb15
commit 40c2d01da2
2 changed files with 11 additions and 7 deletions
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2
libbb/procps.c
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@ -578,7 +578,7 @@ int FAST_FUNC read_cmdline(char *buf, int col, unsigned pid, const char *comm)
*/
while (sz >= 0) {
if ((unsigned char)(buf[sz]) < ' ')
buf[sz] = ' ';
buf[sz] = (buf[sz] ? /*ctrl*/'?' : /*NUL*/' ');
sz--;
}

16
procps/top.c
View file

@ -166,7 +166,7 @@ struct globals {
top_status_t *top;
int ntop;
smallint inverted;
smallint not_first_line;
smallint first_line_printed;
#if ENABLE_FEATURE_TOPMEM
smallint sort_field;
#endif
@ -420,8 +420,8 @@ static void print_line_buf(void)
G.lines_remaining--;
fmt = OPT_BATCH_MODE ? "\n""%.*s" : "\n""%.*s"CLREOL;
if (!G.not_first_line) {
G.not_first_line = 1;
if (!G.first_line_printed) {
G.first_line_printed = 1;
/* Go to top */
fmt = OPT_BATCH_MODE ? "%.*s" : HOME"%.*s"CLREOL;
}
@ -432,9 +432,9 @@ static void print_line_bold(void)
{
G.lines_remaining--;
//we never print first line in bold
// if (!G.not_first_line) {
// if (!G.first_line_printed) {
// printf(OPT_BATCH_MODE ? "%.*s" : HOME"%.*s"CLREOL, G.scr_width - 1, G.line_buf);
// G.not_first_line = 1;
// G.first_line_printed = 1;
// } else {
printf(OPT_BATCH_MODE ? "\n""%.*s" : "\n"REVERSE"%.*s"NORMAL CLREOL, G.scr_width - 1, G.line_buf);
// }
@ -443,7 +443,8 @@ static void print_line_bold(void)
static void print_end(void)
{
fputs_stdout(OPT_BATCH_MODE ? "\n" : CLREOS"\r");
G.not_first_line = 0; /* next print will be "first line" (will clear the screen) */
/* next print will be "first line" (will clear the screen) */
G.first_line_printed = 0;
}
#if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS && ENABLE_FEATURE_TOP_DECIMALS
@ -1204,6 +1205,9 @@ int top_main(int argc UNUSED_PARAM, char **argv)
INIT_G();
//worth it?
// setvbuf(stdout, /*buf*/ NULL, _IOFBF, /*size*/ 0);
interval = 5; /* default update interval is 5 seconds */
iterations = 0; /* infinite */
#if ENABLE_FEATURE_TOP_SMP_CPU