From 1158fdd1b15e549975725fbb6fa6fbb9f68412ec Mon Sep 17 00:00:00 2001 From: albert <> Date: Sat, 21 Dec 2002 06:22:00 +0000 Subject: [PATCH] checkpoint --- NEWS | 6 +++++ {ps => proc}/escape.c | 0 proc/readproc.c | 57 +++++++++++++++++++++++-------------------- ps/TRANSLATION | 2 +- ps/help.c | 2 +- ps/module.mk | 2 +- ps/parser.c | 2 +- 7 files changed, 40 insertions(+), 31 deletions(-) rename {ps => proc}/escape.c (100%) diff --git a/NEWS b/NEWS index a5983d5e..c284abcd 100644 --- a/NEWS +++ b/NEWS @@ -1,3 +1,9 @@ +procps-3.1.4 --> procps-3.1.5 + +ancient (2.x.xx era) data corruption fixed +serious hidden-process problem (3.1.3+) fixed +escape sequence vulnerability fixed + procps-3.1.3 --> procps-3.1.4 top: was trashing every "3" in a command name diff --git a/ps/escape.c b/proc/escape.c similarity index 100% rename from ps/escape.c rename to proc/escape.c diff --git a/proc/readproc.c b/proc/readproc.c index c8a9fddf..c8adce02 100644 --- a/proc/readproc.c +++ b/proc/readproc.c @@ -77,6 +77,13 @@ void freeproc(proc_t* p) { } +// 2.5.xx looks like: +// +// "State:\t%s\n" +// "Tgid:\t%d\n" +// "Pid:\t%d\n" +// "PPid:\t%d\n" +// "TracerPid:\t%d\n" static void status2proc(const char *S, proc_t *restrict P){ char* tmp; @@ -105,11 +112,9 @@ static void status2proc(const char *S, proc_t *restrict P){ if(likely(tmp)) P->state = tmp[7]; else fprintf(stderr, "Internal error!\n"); - tmp = strstr (S,"Pid:"); + tmp = strstr (S,"PPid:"); if(likely(tmp)) sscanf (tmp, - "Pid:\t%d\n" "PPid:\t%d\n", - &P->pid, &P->ppid ); else fprintf(stderr, "Internal error!\n"); @@ -166,10 +171,8 @@ static void status2proc(const char *S, proc_t *restrict P){ -/* stat2proc() makes sure it can handle arbitrary executable file basenames - * for `cmd', i.e. those with embedded whitespace or embedded ')'s. - * Such names confuse %s (see scanf(3)), so the string is split and %39c - * is used instead. (except for embedded ')' "(%[^)]c)" would work. +/* Reads /proc/*/stat files, being careful not to trip over processes with + * names like ":-) 1 2 3 4 5 6". */ static void stat2proc(const char* S, proc_t *restrict P) { unsigned num; @@ -181,9 +184,8 @@ static void stat2proc(const char* S, proc_t *restrict P) { P->rtprio = -1; P->sched = -1; - P->pid = strtol(S, &tmp, 10); - S = tmp + 2; - tmp = strrchr(S, ')'); // split into "PID (cmd" and "" + S = strchr(S, '(') + 1; + tmp = strrchr(S, ')'); num = tmp - S; if(unlikely(num >= sizeof P->cmd)) num = sizeof P->cmd - 1; memcpy(P->cmd, S, num); @@ -376,16 +378,20 @@ next_proc: /* get next PID for consideration */ #define flags (PT->flags) if (flags & PROC_PID) { - if (unlikely(!*PT->pids)) /* set to next item in pids */ - return NULL; - sprintf(path, "/proc/%d", *(PT->pids)++); + pid_t pid = *(PT->pids)++; + if (unlikely(!pid)) return NULL; + p->pid = pid; + snprintf(path, sizeof path, "/proc/%d", pid); } else { /* get next numeric /proc ent */ for (;;) { ent = readdir(PT->procfs); if(unlikely(unlikely(!ent) || unlikely(!ent->d_name))) return NULL; - if(likely( likely(*ent->d_name > '0') && likely(*ent->d_name < '9') )) break; + if(likely( likely(*ent->d_name > '0') && likely(*ent->d_name <= '9') )) break; } - sprintf(path, "/proc/%s", ent->d_name); + p->pid = strtoul(ent->d_name, NULL, 10); + memcpy(path, "/proc/", 6); + strcpy(path+6, ent->d_name); // trust /proc to not contain evil top-level entries +// snprintf(path, sizeof path, "/proc/%s", ent->d_name); } #ifdef FLASK_LINUX if ( stat_secure(path, &sb, &secsid) == -1 ) /* no such dirent (anymore) */ @@ -452,9 +458,6 @@ next_proc: /* get next PID for consideration */ else p->environ = NULL; - if (unlikely(p->state == 'Z')) /* fixup cmd for zombies */ - strncat(p->cmd," ", sizeof p->cmd); - return p; } #undef flags @@ -484,12 +487,15 @@ next_proc: /* get next PID for consideration */ /*printf("PT->flags is 0x%08x\n", PT->flags);*/ #define flags (PT->flags) - while ((ent = readdir(PT->procfs)) && - (*ent->d_name < '0' || *ent->d_name > '9')) - ; - if (!ent || !ent->d_name) - return NULL; - sprintf(path, "/proc/%s", ent->d_name); + for (;;) { + ent = readdir(PT->procfs); + if(unlikely(unlikely(!ent) || unlikely(!ent->d_name))) return NULL; + if(likely( likely(*ent->d_name > '0') && likely(*ent->d_name <= '9') )) break; + } + p->pid = strtoul(ent->d_name, NULL, 10); + memcpy(path, "/proc/", 6); + strcpy(path+6, ent->d_name); // trust /proc to not contain evil top-level entries +// snprintf(path, sizeof path, "/proc/%s", ent->d_name); #ifdef FLASK_LINUX if (stat_secure(path, &sb, &secsid) == -1) /* no such dirent (anymore) */ @@ -550,9 +556,6 @@ next_proc: /* get next PID for consideration */ else p->environ = NULL; - if (p->state == 'Z') /* fixup cmd for zombies */ - strncat(p->cmd," ", sizeof p->cmd); - return p; } #undef flags diff --git a/ps/TRANSLATION b/ps/TRANSLATION index 788aa6fe..a5a15946 100644 --- a/ps/TRANSLATION +++ b/ps/TRANSLATION @@ -24,5 +24,5 @@ I think these are the most important options: -f full format s signal format u user-oriented format ---forest ASCII art forest (process heirarchy) +--forest ASCII art forest (process hierarchy) c show true command name diff --git a/ps/help.c b/ps/help.c index 29ab28fc..0b091a83 100644 --- a/ps/help.c +++ b/ps/help.c @@ -42,7 +42,7 @@ const char *help_message = "-V,V show version L list format codes f ASCII art forest\n" "-m,m show threads S children in sum -y change -l format\n" "-n,N set namelist file c true command name n numeric WCHAN,UID\n" -"-w,w wide output e show environment -H process heirarchy\n" +"-w,w wide output e show environment -H process hierarchy\n" ; diff --git a/ps/module.mk b/ps/module.mk index 8a07e950..8510204c 100755 --- a/ps/module.mk +++ b/ps/module.mk @@ -11,7 +11,7 @@ DIRS += ps/ # a file to create ALL += ps/ps -PS_C := display escape global help output parser select sortformat +PS_C := display global help output parser select sortformat PSNAMES := $(addprefix ps/,$(PS_C)) PSOBJ := $(addsuffix .o,$(PSNAMES)) PSSRC := $(addsuffix .c,$(PSNAMES)) diff --git a/ps/parser.c b/ps/parser.c index cb121819..a7ac4a71 100644 --- a/ps/parser.c +++ b/ps/parser.c @@ -253,7 +253,7 @@ static const char *parse_sysv_option(void){ selection_list->typecode = SEL_RGID; return NULL; /* can't have any more options */ case 'H': /* another nice HP/UX feature */ - trace("-H Process heirarchy (like ASCII art forest option)\n"); + trace("-H Process hierarchy (like ASCII art forest option)\n"); forest_type = 'u'; break; case 'L': /* */