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+diff -urpN busybox-1.15.1/libbb/procps.c busybox-1.15.1-pidof_killall/libbb/procps.c
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+--- busybox-1.15.1/libbb/procps.c 2009-09-12 17:55:58.000000000 +0200
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++++ busybox-1.15.1-pidof_killall/libbb/procps.c 2009-09-22 23:03:59.000000000 +0200
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+@@ -134,8 +134,8 @@ static unsigned long fast_strtoul_16(cha
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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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+
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+ #if ENABLE_FEATURE_FAST_TOP
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+@@ -198,14 +198,16 @@ procps_status_t* FAST_FUNC procps_scan(p
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+ if (errno)
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+ continue;
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+
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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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+
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+ memset(&sp->vsz, 0, sizeof(*sp) - offsetof(procps_status_t, vsz));
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+
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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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+
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+ #if ENABLE_SELINUX
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+ if (flags & PSSCAN_CONTEXT) {
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+@@ -218,7 +220,7 @@ procps_status_t* FAST_FUNC procps_scan(p
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+
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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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+@@ -234,10 +236,10 @@ procps_status_t* FAST_FUNC procps_scan(p
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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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+@@ -257,12 +259,12 @@ procps_status_t* FAST_FUNC procps_scan(p
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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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+@@ -271,17 +273,17 @@ procps_status_t* FAST_FUNC procps_scan(p
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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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+
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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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+
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+ /* vsz is in bytes and we want kb */
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+ sp->vsz = vsz >> 10;
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+@@ -311,14 +313,14 @@ procps_status_t* FAST_FUNC procps_scan(p
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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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+
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+ #if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS
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+@@ -343,48 +345,48 @@ procps_status_t* FAST_FUNC procps_scan(p
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+
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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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+@@ -393,23 +395,34 @@ procps_status_t* FAST_FUNC procps_scan(p
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+
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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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+@@ -452,13 +465,9 @@ procps_status_t* FAST_FUNC procps_scan(p
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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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++
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+ return sp;
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+ }
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+
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Peter Korsgaard