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authorDenis Vlasenko2007-06-30 14:47:41 +0000
committerDenis Vlasenko2007-06-30 14:47:41 +0000
commit98ebab8b768d4651d8db2f46a0cd6bd53012c8e6 (patch)
tree2f491e67f1f49a31b0cfeeaabb032b646b8d808c /procps
parent8b1409896d3224fec477bc372c4dceaebe6d6351 (diff)
downloadbusybox-98ebab8b768d4651d8db2f46a0cd6bd53012c8e6.zip
busybox-98ebab8b768d4651d8db2f46a0cd6bd53012c8e6.tar.gz
top,ps: improve /proc/PID/cmdinfo reading code
function old new delta display_status - 1231 +1231 read_cmdline - 101 +101 parse_conf 1284 1303 +19 arith 2033 2042 +9 collect_blk 467 474 +7 fsck_main 1909 1911 +2 dhcprelay_main 1125 1122 -3 singlemount 4555 4547 -8 read_close 50 36 -14 get_lcm 123 105 -18 ed_main 3111 3084 -27 func_args 73 28 -45 procps_scan 732 658 -74 top_main 2187 899 -1288 ------------------------------------------------------------------------------ (add/remove: 2/0 grow/shrink: 4/8 up/down: 1369/-1477) Total: -108 bytes text data bss dec hex filename 676048 2744 13968 692760 a9218 busybox_old 675940 2744 13968 692652 a91ac busybox_unstripped
Diffstat (limited to 'procps')
-rw-r--r--procps/ps.c63
-rw-r--r--procps/top.c22
2 files changed, 34 insertions, 51 deletions
diff --git a/procps/ps.c b/procps/ps.c
index 003e8ea..c6bffc6 100644
--- a/procps/ps.c
+++ b/procps/ps.c
@@ -27,11 +27,7 @@ static void func_comm(char *buf, int size, const procps_status_t *ps)
static void func_args(char *buf, int size, const procps_status_t *ps)
{
- buf[0] = '\0';
- if (ps->cmd)
- safe_strncpy(buf, ps->cmd, size+1);
- else if (size >= 2)
- sprintf(buf, "[%.*s]", size-2, ps->comm);
+ read_cmdline(buf, size, ps->pid, ps->comm);
}
static void func_pid(char *buf, int size, const procps_status_t *ps)
@@ -112,25 +108,25 @@ typedef struct {
static const ps_out_t out_spec[] = {
// Mandated by POSIX:
- { 8 , "user" ,"USER" ,func_user ,PSSCAN_UIDGID },
- { 16 , "comm" ,"COMMAND",func_comm ,PSSCAN_COMM },
- { 256 , "args" ,"COMMAND",func_args ,PSSCAN_CMD|PSSCAN_COMM },
- { 5 , "pid" ,"PID" ,func_pid ,PSSCAN_PID },
- { 5 , "ppid" ,"PPID" ,func_ppid ,PSSCAN_PPID },
- { 5 , "pgid" ,"PGID" ,func_pgid ,PSSCAN_PGID },
-// { sizeof("ELAPSED")-1, "etime" ,"ELAPSED",func_etime ,PSSCAN_ },
-// { sizeof("GROUP" )-1, "group" ,"GROUP" ,func_group ,PSSCAN_UIDGID },
-// { sizeof("NI" )-1, "nice" ,"NI" ,func_nice ,PSSCAN_ },
-// { sizeof("%CPU" )-1, "pcpu" ,"%CPU" ,func_pcpu ,PSSCAN_ },
-// { sizeof("RGROUP" )-1, "rgroup","RGROUP" ,func_rgroup,PSSCAN_UIDGID },
-// { sizeof("RUSER" )-1, "ruser" ,"RUSER" ,func_ruser ,PSSCAN_UIDGID },
-// { sizeof("TIME" )-1, "time" ,"TIME" ,func_time ,PSSCAN_ },
- { 6 , "tty" ,"TT" ,func_tty ,PSSCAN_TTY },
- { 4 , "vsz" ,"VSZ" ,func_vsz ,PSSCAN_VSZ },
+ { 8 , "user" ,"USER" ,func_user ,PSSCAN_UIDGID },
+ { 16 , "comm" ,"COMMAND",func_comm ,PSSCAN_COMM },
+ { 256 , "args" ,"COMMAND",func_args ,PSSCAN_COMM },
+ { 5 , "pid" ,"PID" ,func_pid ,PSSCAN_PID },
+ { 5 , "ppid" ,"PPID" ,func_ppid ,PSSCAN_PPID },
+ { 5 , "pgid" ,"PGID" ,func_pgid ,PSSCAN_PGID },
+// { sizeof("ELAPSED")-1, "etime" ,"ELAPSED",func_etime ,PSSCAN_ },
+// { sizeof("GROUP" )-1, "group" ,"GROUP" ,func_group ,PSSCAN_UIDGID },
+// { sizeof("NI" )-1, "nice" ,"NI" ,func_nice ,PSSCAN_ },
+// { sizeof("%CPU" )-1, "pcpu" ,"%CPU" ,func_pcpu ,PSSCAN_ },
+// { sizeof("RGROUP" )-1, "rgroup","RGROUP" ,func_rgroup,PSSCAN_UIDGID },
+// { sizeof("RUSER" )-1, "ruser" ,"RUSER" ,func_ruser ,PSSCAN_UIDGID },
+// { sizeof("TIME" )-1, "time" ,"TIME" ,func_time ,PSSCAN_ },
+ { 6 , "tty" ,"TT" ,func_tty ,PSSCAN_TTY },
+ { 4 , "vsz" ,"VSZ" ,func_vsz ,PSSCAN_VSZ },
// Not mandated by POSIX, but useful:
- { 4 , "rss" ,"RSS" ,func_rss ,PSSCAN_RSS },
+ { 4 , "rss" ,"RSS" ,func_rss ,PSSCAN_RSS },
#if ENABLE_SELINUX
- { 35 , "label" ,"LABEL" ,func_label ,PSSCAN_CONTEXT },
+ { 35 , "label" ,"LABEL" ,func_label ,PSSCAN_CONTEXT },
#endif
};
@@ -386,10 +382,9 @@ int ps_main(int argc, char **argv)
| PSSCAN_UIDGID
| PSSCAN_STATE
| PSSCAN_VSZ
- | PSSCAN_CMD
+ | PSSCAN_COMM
| use_selinux
))) {
- char *namecmd = p->cmd;
#if ENABLE_SELINUX
if (use_selinux) {
len = printf("%5u %-32s %s ",
@@ -408,21 +403,11 @@ int ps_main(int argc, char **argv)
p->pid, user, p->vsz, p->state);
}
- i = terminal_width-len;
-
- if (namecmd && namecmd[0]) {
- if (i < 0)
- i = 0;
- if (strlen(namecmd) > (size_t)i)
- namecmd[i] = '\0';
- puts(namecmd);
- } else {
- namecmd = p->comm;
- if (i < 2)
- i = 2;
- if (strlen(namecmd) > ((size_t)i-2))
- namecmd[i-2] = '\0';
- printf("[%s]\n", namecmd);
+ {
+ char sz = terminal_width - len;
+ char buf[sz + 1];
+ read_cmdline(buf, sz, p->pid, p->comm);
+ puts(buf);
}
}
if (ENABLE_FEATURE_CLEAN_UP)
diff --git a/procps/top.c b/procps/top.c
index 136f140..a37a0d0 100644
--- a/procps/top.c
+++ b/procps/top.c
@@ -40,11 +40,10 @@ typedef struct top_status_t {
unsigned pid, ppid;
unsigned uid;
char state[4];
-/* TODO: read /proc/$PID/cmdline only for processes which are displayed */
- char cmd[64];
+ char comm[COMM_LEN];
} top_status_t;
-typedef struct jiffy_counts_t{
+typedef struct jiffy_counts_t {
unsigned long long usr,nic,sys,idle,iowait,irq,softirq,steal;
unsigned long long total;
unsigned long long busy;
@@ -421,7 +420,7 @@ static void display_status(int count, int scr_width)
/* Ok, all prelim data is ready, go thru the list */
while (count-- > 0) {
- int col = scr_width+1;
+ int col = scr_width;
CALC_STAT(pmem, (s->vsz*pmem_scale + pmem_half) >> pmem_shift);
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
CALC_STAT(pcpu, (s->pcpu*pcpu_scale + pcpu_half) >> pcpu_shift);
@@ -444,8 +443,11 @@ static void display_status(int count, int scr_width)
, SHOW_STAT(pcpu)
#endif
);
- if (col > 0)
- printf("%.*s", col, s->cmd);
+ if (col > 0) {
+ char buf[col + 1];
+ read_cmdline(buf, col, s->pid, s->comm);
+ fputs(buf, stdout);
+ }
/* printf(" %d/%d %lld/%lld", s->pcpu, total_pcpu,
jif.busy - prev_jif.busy, jif.total - prev_jif.total); */
s++;
@@ -560,12 +562,11 @@ int top_main(int argc, char **argv)
| PSSCAN_UTIME
| PSSCAN_STATE
| PSSCAN_COMM
- | PSSCAN_CMD
| PSSCAN_SID
| PSSCAN_UIDGID
))) {
int n = ntop;
- top = xrealloc(top, (++ntop)*sizeof(top_status_t));
+ top = xrealloc(top, (++ntop) * sizeof(*top));
top[n].pid = p->pid;
top[n].ppid = p->ppid;
top[n].vsz = p->vsz;
@@ -574,10 +575,7 @@ int top_main(int argc, char **argv)
#endif
top[n].uid = p->uid;
strcpy(top[n].state, p->state);
- if (p->cmd)
- safe_strncpy(top[n].cmd, p->cmd, sizeof(top[n].cmd));
- else /* mimic ps */
- sprintf(top[n].cmd, "[%s]", p->comm);
+ strcpy(top[n].comm, p->comm);
}
if (ntop == 0) {
bb_error_msg_and_die("no process info in /proc");