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authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2008-03-19 19:38:46 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2008-03-19 19:38:46 +0000
commitcf7cf622046b0e1a2817e1da4aa8bc6f513b0153 (patch)
tree30bc88b5a107bfe6d5f751ca722ed5a49a0b5fd8
parent0764a7f72d7e5490b85dd0816bef8e56f6216d92 (diff)
downloadbusybox-cf7cf622046b0e1a2817e1da4aa8bc6f513b0153.tar.gz
busybox-cf7cf622046b0e1a2817e1da4aa8bc6f513b0153.tar.bz2
*: s/BB_SIGS_FATAL/BB_FATAL_SIGS/ (latter proved easier to remember)
top: fix "top </dev/null" case (by Cristian Ionescu-Idbohrn)
-rw-r--r--include/libbb.h4
-rw-r--r--miscutils/less.c2
-rw-r--r--miscutils/watchdog.c2
-rw-r--r--networking/tcpudp.c2
-rw-r--r--procps/top.c48
5 files changed, 34 insertions, 24 deletions
diff --git a/include/libbb.h b/include/libbb.h
index 654643743..d059ac9de 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -278,7 +278,7 @@ char *xmalloc_follow_symlinks(const char *path);
enum {
- /* bb_signals(BB_SIGS_FATAL, handler) catches all signals which
+ /* bb_signals(BB_FATAL_SIGS, handler) catches all signals which
* otherwise would kill us, except for those resulting from bugs:
* SIGSEGV, SIGILL, SIGFPE.
* Other fatal signals not included (TODO?):
@@ -288,7 +288,7 @@ enum {
* SIGSYS Bad argument to routine
* SIGTRAP Trace/breakpoint trap
*/
- BB_SIGS_FATAL = 0
+ BB_FATAL_SIGS = 0
+ (1 << SIGHUP)
+ (1 << SIGINT)
+ (1 << SIGTERM)
diff --git a/miscutils/less.c b/miscutils/less.c
index 3a9dea039..1a67ca7ce 100644
--- a/miscutils/less.c
+++ b/miscutils/less.c
@@ -1400,7 +1400,7 @@ int less_main(int argc, char **argv)
term_less.c_cc[VTIME] = 0;
/* We want to restore term_orig on exit */
- bb_signals(BB_SIGS_FATAL, sig_catcher);
+ bb_signals(BB_FATAL_SIGS, sig_catcher);
reinitialize();
while (1) {
diff --git a/miscutils/watchdog.c b/miscutils/watchdog.c
index 7fb16b861..a5061f5d7 100644
--- a/miscutils/watchdog.c
+++ b/miscutils/watchdog.c
@@ -46,7 +46,7 @@ int watchdog_main(int argc, char **argv)
bb_daemonize_or_rexec(DAEMON_CHDIR_ROOT, argv);
}
- bb_signals(BB_SIGS_FATAL, watchdog_shutdown);
+ bb_signals(BB_FATAL_SIGS, watchdog_shutdown);
/* Use known fd # - avoid needing global 'int fd' */
xmove_fd(xopen(argv[argc - 1], O_WRONLY), 3);
diff --git a/networking/tcpudp.c b/networking/tcpudp.c
index f97787497..5da4de505 100644
--- a/networking/tcpudp.c
+++ b/networking/tcpudp.c
@@ -264,7 +264,7 @@ int tcpudpsvd_main(int argc ATTRIBUTE_UNUSED, char **argv)
sig_block(SIGCHLD);
signal(SIGCHLD, sig_child_handler);
- bb_signals(BB_SIGS_FATAL, sig_term_handler);
+ bb_signals(BB_FATAL_SIGS, sig_term_handler);
signal(SIGPIPE, SIG_IGN);
if (max_per_host)
diff --git a/procps/top.c b/procps/top.c
index fdd7584c8..85ceaccf7 100644
--- a/procps/top.c
+++ b/procps/top.c
@@ -108,8 +108,13 @@ enum { LINE_BUF_SIZE = COMMON_BUFSIZE - offsetof(struct globals, line_buf) };
#define total_pcpu (G.total_pcpu )
#define line_buf (G.line_buf )
-
-#define OPT_BATCH_MODE (option_mask32 & 0x4)
+enum {
+ OPT_d = (1 << 0),
+ OPT_n = (1 << 1),
+ OPT_b = (1 << 2),
+ OPT_EOF = (1 << 3), /* pseudo: "we saw EOF in stdin" */
+};
+#define OPT_BATCH_MODE (option_mask32 & OPT_b)
#if ENABLE_FEATURE_USE_TERMIOS
@@ -165,7 +170,7 @@ static void get_jiffy_counts(void)
if (fscanf(fp, "cpu %lld %lld %lld %lld %lld %lld %lld %lld",
&jif.usr,&jif.nic,&jif.sys,&jif.idle,
&jif.iowait,&jif.irq,&jif.softirq,&jif.steal) < 4) {
- bb_error_msg_and_die("failed to read /proc/stat");
+ bb_error_msg_and_die("can't read /proc/stat");
}
fclose(fp);
jif.total = jif.usr + jif.nic + jif.sys + jif.idle
@@ -506,7 +511,7 @@ static void clearmems(void)
static void reset_term(void)
{
- tcsetattr(0, TCSANOW, (void *) &initial_settings);
+ tcsetattr(0, TCSANOW, &initial_settings);
if (ENABLE_FEATURE_CLEAN_UP) {
clearmems();
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
@@ -753,13 +758,13 @@ int top_main(int argc ATTRIBUTE_UNUSED, char **argv)
INIT_G();
- interval = 5; /* default update rate is 5 seconds */
+ interval = 5; /* default update interval is 5 seconds */
iterations = 0; /* infinite */
- /* do normal option parsing */
+ /* all args are options; -n NUM */
opt_complementary = "-:n+";
getopt32(argv, "d:n:b", &sinterval, &iterations);
- if (option_mask32 & 0x1) {
+ if (option_mask32 & OPT_d) {
/* Need to limit it to not overflow poll timeout */
interval = xatou16(sinterval); // -d
}
@@ -772,12 +777,8 @@ int top_main(int argc ATTRIBUTE_UNUSED, char **argv)
/* unbuffered input, turn off echo */
new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL);
- bb_signals(0
- + (1 << SIGTERM)
- + (1 << SIGINT)
- , sig_catcher);
+ bb_signals(BB_FATAL_SIGS, sig_catcher);
tcsetattr(0, TCSANOW, (void *) &new_settings);
- atexit(reset_term);
#endif /* FEATURE_USE_TERMIOS */
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
@@ -794,7 +795,8 @@ int top_main(int argc ATTRIBUTE_UNUSED, char **argv)
lines = 24; /* default */
col = 79;
#if ENABLE_FEATURE_USE_TERMIOS
- get_terminal_width_height(0, &col, &lines);
+ /* We output to stdout, we need size of stdout (not stdin)! */
+ get_terminal_width_height(STDOUT_FILENO, &col, &lines);
if (lines < 5 || col < 10) {
sleep(interval);
continue;
@@ -839,9 +841,10 @@ int top_main(int argc ATTRIBUTE_UNUSED, char **argv)
topmem[n].stack = p->stack;
#endif
}
- }
+ } /* end of "while we read /proc" */
if (ntop == 0) {
- bb_error_msg_and_die("no process info in /proc");
+ bb_error_msg("no process info in /proc");
+ break;
}
if (scan_mask == TOP_MASK) {
@@ -875,9 +878,14 @@ int top_main(int argc ATTRIBUTE_UNUSED, char **argv)
#if !ENABLE_FEATURE_USE_TERMIOS
sleep(interval);
#else
- if (safe_poll(pfd, 1, interval * 1000) > 0) {
- if (read(0, &c, 1) != 1) /* signal */
- break;
+ if (option_mask32 & (OPT_b|OPT_EOF))
+ /* batch mode, or EOF on stdin ("top </dev/null") */
+ sleep(interval);
+ else if (safe_poll(pfd, 1, interval * 1000) > 0) {
+ if (safe_read(0, &c, 1) != 1) { /* error/EOF? */
+ option_mask32 |= OPT_EOF;
+ continue;
+ }
if (c == initial_settings.c_cc[VINTR])
break;
c |= 0x20; /* lowercase */
@@ -922,7 +930,9 @@ int top_main(int argc ATTRIBUTE_UNUSED, char **argv)
#endif
}
#endif /* FEATURE_USE_TERMIOS */
- }
+ } /* end of "while (1)" */
+
bb_putchar('\n');
+ reset_term();
return EXIT_SUCCESS;
}