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https://github.com/topjohnwu/ndk-busybox.git
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pidof/killall: fix bug 625 (kernel threads get stale "binary name")
function old new delta procps_scan 1622 1642 +20 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
200d522fb8
commit
ed4ff0e8cb
133
libbb/procps.c
133
libbb/procps.c
@ -138,8 +138,8 @@ static unsigned long fast_strtoul_16(char **endptr)
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return n;
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}
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/* TOPMEM uses fast_strtoul_10, so... */
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#undef ENABLE_FEATURE_FAST_TOP
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#define ENABLE_FEATURE_FAST_TOP 1
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# undef ENABLE_FEATURE_FAST_TOP
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# define ENABLE_FEATURE_FAST_TOP 1
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#endif
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#if ENABLE_FEATURE_FAST_TOP
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@ -223,14 +223,16 @@ procps_status_t* FAST_FUNC procps_scan(procps_status_t* sp, int flags)
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}
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#endif
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/* After this point we have to break, not continue
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* ("continue" would mean that current /proc/NNN
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* is not a valid process info) */
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/* After this point we can:
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* "break": stop parsing, return the data
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* "continue": try next /proc/XXX
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*/
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memset(&sp->vsz, 0, sizeof(*sp) - offsetof(procps_status_t, vsz));
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sp->pid = pid;
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if (!(flags & ~PSSCAN_PID)) break;
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if (!(flags & ~PSSCAN_PID))
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break; /* we needed only pid, we got it */
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#if ENABLE_SELINUX
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if (flags & PSSCAN_CONTEXT) {
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@ -243,7 +245,7 @@ procps_status_t* FAST_FUNC procps_scan(procps_status_t* sp, int flags)
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if (flags & PSSCAN_UIDGID) {
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if (stat(filename, &sb))
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break;
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continue; /* process probably exited */
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/* Effective UID/GID, not real */
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sp->uid = sb.st_uid;
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sp->gid = sb.st_gid;
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@ -259,10 +261,10 @@ procps_status_t* FAST_FUNC procps_scan(procps_status_t* sp, int flags)
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strcpy(filename_tail, "stat");
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n = read_to_buf(filename, buf);
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if (n < 0)
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break;
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continue; /* process probably exited */
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cp = strrchr(buf, ')'); /* split into "PID (cmd" and "<rest>" */
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/*if (!cp || cp[1] != ' ')
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break;*/
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continue;*/
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cp[0] = '\0';
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if (sizeof(sp->comm) < 16)
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BUG_comm_size();
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@ -282,12 +284,12 @@ procps_status_t* FAST_FUNC procps_scan(procps_status_t* sp, int flags)
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"%lu " /* start_time */
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"%lu " /* vsize */
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"%lu " /* rss */
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#if ENABLE_FEATURE_TOP_SMP_PROCESS
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# if ENABLE_FEATURE_TOP_SMP_PROCESS
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"%*s %*s %*s %*s %*s %*s " /*rss_rlim, start_code, end_code, start_stack, kstk_esp, kstk_eip */
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"%*s %*s %*s %*s " /*signal, blocked, sigignore, sigcatch */
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"%*s %*s %*s %*s " /*wchan, nswap, cnswap, exit_signal */
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"%d" /*cpu last seen on*/
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#endif
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# endif
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,
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sp->state, &sp->ppid,
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&sp->pgid, &sp->sid, &tty,
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@ -296,17 +298,17 @@ procps_status_t* FAST_FUNC procps_scan(procps_status_t* sp, int flags)
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&sp->start_time,
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&vsz,
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&rss
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#if ENABLE_FEATURE_TOP_SMP_PROCESS
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# if ENABLE_FEATURE_TOP_SMP_PROCESS
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, &sp->last_seen_on_cpu
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#endif
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# endif
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);
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if (n < 11)
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break;
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#if ENABLE_FEATURE_TOP_SMP_PROCESS
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continue; /* bogus data, get next /proc/XXX */
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# if ENABLE_FEATURE_TOP_SMP_PROCESS
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if (n < 11+15)
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sp->last_seen_on_cpu = 0;
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#endif
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# endif
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/* vsz is in bytes and we want kb */
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sp->vsz = vsz >> 10;
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@ -336,14 +338,14 @@ procps_status_t* FAST_FUNC procps_scan(procps_status_t* sp, int flags)
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sp->vsz = fast_strtoul_10(&cp) >> 10;
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/* vsz is in bytes but rss is in *PAGES*! Can you believe that? */
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sp->rss = fast_strtoul_10(&cp) << sp->shift_pages_to_kb;
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#if ENABLE_FEATURE_TOP_SMP_PROCESS
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# if ENABLE_FEATURE_TOP_SMP_PROCESS
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/* (6): rss_rlim, start_code, end_code, start_stack, kstk_esp, kstk_eip */
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/* (4): signal, blocked, sigignore, sigcatch */
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/* (4): wchan, nswap, cnswap, exit_signal */
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cp = skip_fields(cp, 14);
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//FIXME: is it safe to assume this field exists?
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sp->last_seen_on_cpu = fast_strtoul_10(&cp);
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#endif
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# endif
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#endif /* end of !ENABLE_FEATURE_TOP_SMP_PROCESS */
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#if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS
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@ -368,48 +370,48 @@ procps_status_t* FAST_FUNC procps_scan(procps_status_t* sp, int flags)
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strcpy(filename_tail, "smaps");
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file = fopen_for_read(filename);
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if (!file)
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break;
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while (fgets(buf, sizeof(buf), file)) {
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unsigned long sz;
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char *tp;
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char w;
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if (file) {
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while (fgets(buf, sizeof(buf), file)) {
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unsigned long sz;
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char *tp;
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char w;
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#define SCAN(str, name) \
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if (strncmp(buf, str, sizeof(str)-1) == 0) { \
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tp = skip_whitespace(buf + sizeof(str)-1); \
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sp->name += fast_strtoul_10(&tp); \
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continue; \
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}
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SCAN("Shared_Clean:" , shared_clean );
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SCAN("Shared_Dirty:" , shared_dirty );
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SCAN("Private_Clean:", private_clean);
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SCAN("Private_Dirty:", private_dirty);
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SCAN("Shared_Clean:" , shared_clean );
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SCAN("Shared_Dirty:" , shared_dirty );
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SCAN("Private_Clean:", private_clean);
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SCAN("Private_Dirty:", private_dirty);
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#undef SCAN
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// f7d29000-f7d39000 rw-s ADR M:m OFS FILE
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tp = strchr(buf, '-');
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if (tp) {
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*tp = ' ';
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tp = buf;
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sz = fast_strtoul_16(&tp); /* start */
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sz = (fast_strtoul_16(&tp) - sz) >> 10; /* end - start */
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// tp -> "rw-s" string
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w = tp[1];
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// skipping "rw-s ADR M:m OFS "
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tp = skip_whitespace(skip_fields(tp, 4));
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// filter out /dev/something (something != zero)
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if (strncmp(tp, "/dev/", 5) != 0 || strcmp(tp, "/dev/zero\n") == 0) {
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if (w == 'w') {
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sp->mapped_rw += sz;
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} else if (w == '-') {
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sp->mapped_ro += sz;
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// f7d29000-f7d39000 rw-s ADR M:m OFS FILE
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tp = strchr(buf, '-');
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if (tp) {
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*tp = ' ';
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tp = buf;
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sz = fast_strtoul_16(&tp); /* start */
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sz = (fast_strtoul_16(&tp) - sz) >> 10; /* end - start */
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// tp -> "rw-s" string
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w = tp[1];
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// skipping "rw-s ADR M:m OFS "
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tp = skip_whitespace(skip_fields(tp, 4));
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// filter out /dev/something (something != zero)
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if (strncmp(tp, "/dev/", 5) != 0 || strcmp(tp, "/dev/zero\n") == 0) {
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if (w == 'w') {
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sp->mapped_rw += sz;
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} else if (w == '-') {
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sp->mapped_ro += sz;
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}
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}
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}
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//else printf("DROPPING %s (%s)\n", buf, tp);
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if (strcmp(tp, "[stack]\n") == 0)
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sp->stack += sz;
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if (strcmp(tp, "[stack]\n") == 0)
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sp->stack += sz;
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}
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}
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fclose(file);
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}
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fclose(file);
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}
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#endif /* TOPMEM */
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#if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS
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@ -418,23 +420,34 @@ procps_status_t* FAST_FUNC procps_scan(procps_status_t* sp, int flags)
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strcpy(filename_tail, "status");
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file = fopen_for_read(filename);
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if (!file)
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break;
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while (fgets(buf, sizeof(buf), file)) {
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char *tp;
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if (file) {
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while (fgets(buf, sizeof(buf), file)) {
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char *tp;
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#define SCAN_TWO(str, name, statement) \
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if (strncmp(buf, str, sizeof(str)-1) == 0) { \
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tp = skip_whitespace(buf + sizeof(str)-1); \
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sscanf(tp, "%u", &sp->name); \
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statement; \
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}
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SCAN_TWO("Uid:", ruid, continue);
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SCAN_TWO("Gid:", rgid, break);
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SCAN_TWO("Uid:", ruid, continue);
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SCAN_TWO("Gid:", rgid, break);
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#undef SCAN_TWO
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}
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fclose(file);
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}
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fclose(file);
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}
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#endif /* PS_ADDITIONAL_COLUMNS */
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if (flags & PSSCAN_EXE) {
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strcpy(filename_tail, "exe");
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free(sp->exe);
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sp->exe = xmalloc_readlink(filename);
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}
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/* Note: if /proc/PID/cmdline is empty,
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* code below "breaks". Therefore it must be
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* the last code to parse /proc/PID/xxx data
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* (we used to have /proc/PID/exe parsing after it
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* and were getting stale sp->exe).
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*/
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#if 0 /* PSSCAN_CMD is not used */
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if (flags & (PSSCAN_CMD|PSSCAN_ARGV0)) {
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free(sp->argv0);
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@ -477,13 +490,9 @@ procps_status_t* FAST_FUNC procps_scan(procps_status_t* sp, int flags)
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}
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}
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#endif
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if (flags & PSSCAN_EXE) {
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strcpy(filename_tail, "exe");
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free(sp->exe);
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sp->exe = xmalloc_readlink(filename);
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}
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break;
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}
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} /* for (;;) */
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return sp;
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}
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