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authorDenis Vlasenko <vda.linux@googlemail.com>2008-07-17 18:39:36 +0000
committerDenis Vlasenko <vda.linux@googlemail.com>2008-07-17 18:39:36 +0000
commit3b3ca113ed00a6781a28172bb3a6860a5f79ea02 (patch)
tree7834909b21af2b0fdbb7c3c52dc3fef12ba0c051
parent18875bf772d72c9c543be8f9ab46dec451f547ea (diff)
downloadbusybox-3b3ca113ed00a6781a28172bb3a6860a5f79ea02.tar.gz
pidof/killall: allow find_pid_by_name to find running
processes started as scripts_with_name_longer_than_15_bytes.sh closes bug 4054 (and is generally neat)
-rw-r--r--include/libbb.h3
-rw-r--r--libbb/find_pid_by_name.c43
-rw-r--r--libbb/procps.c17
-rw-r--r--procps/pgrep.c9
-rw-r--r--procps/pidof.c4
5 files changed, 53 insertions, 23 deletions
diff --git a/include/libbb.h b/include/libbb.h
index aafdfa32c..14af1368c 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -1166,6 +1166,7 @@ typedef struct procps_status_t {
uint8_t shift_pages_to_bytes;
uint8_t shift_pages_to_kb;
/* Fields are set to 0/NULL if failed to determine (or not requested) */
+ uint16_t argv_len;
char *argv0;
USE_SELINUX(char *context;)
/* Everything below must contain no ptrs to malloc'ed data:
@@ -1213,7 +1214,7 @@ enum {
PSSCAN_UTIME = 1 << 13,
PSSCAN_TTY = 1 << 14,
PSSCAN_SMAPS = (1 << 15) * ENABLE_FEATURE_TOPMEM,
- PSSCAN_ARGVN = (1 << 16) * (ENABLE_PGREP | ENABLE_PKILL),
+ PSSCAN_ARGVN = (1 << 16) * (ENABLE_PGREP || ENABLE_PKILL || ENABLE_PIDOF),
USE_SELINUX(PSSCAN_CONTEXT = 1 << 17,)
PSSCAN_START_TIME = 1 << 18,
/* These are all retrieved from proc/NN/stat in one go: */
diff --git a/libbb/find_pid_by_name.c b/libbb/find_pid_by_name.c
index ae2f11643..2ee423cb7 100644
--- a/libbb/find_pid_by_name.c
+++ b/libbb/find_pid_by_name.c
@@ -38,6 +38,35 @@ execXXX("/proc/self/exe", applet_name, params....)
and therefore comm field contains "exe".
*/
+static int comm_match(procps_status_t *p, const char *procName)
+{
+ int argv1idx;
+
+ /* comm does not match */
+ if (strncmp(p->comm, procName, 15) != 0)
+ return 0;
+
+ /* in Linux, if comm is 15 chars, it may be a truncated */
+ if (p->comm[14] == '\0') /* comm is not truncated - match */
+ return 1;
+
+ /* comm is truncated, but first 15 chars match.
+ * This can be crazily_long_script_name.sh!
+ * The telltale sign is basename(argv[1]) == procName. */
+
+ if (!p->argv0)
+ return 0;
+
+ argv1idx = strlen(p->argv0) + 1;
+ if (argv1idx >= p->argv_len)
+ return 0;
+
+ if (strcmp(bb_basename(p->argv0 + argv1idx), procName) != 0)
+ return 0;
+
+ return 1;
+}
+
/* find_pid_by_name()
*
* Modified by Vladimir Oleynik for use with libbb/procps.c
@@ -48,24 +77,20 @@ and therefore comm field contains "exe".
* Returns a list of all matching PIDs
* It is the caller's duty to free the returned pidlist.
*/
-pid_t* FAST_FUNC find_pid_by_name(const char* procName)
+pid_t* FAST_FUNC find_pid_by_name(const char *procName)
{
pid_t* pidList;
int i = 0;
procps_status_t* p = NULL;
- pidList = xmalloc(sizeof(*pidList));
- while ((p = procps_scan(p, PSSCAN_PID|PSSCAN_COMM|PSSCAN_ARGV0))) {
- if (
- /* we require comm to match and to not be truncated */
- /* in Linux, if comm is 15 chars, it may be a truncated
- * name, so we don't allow that to match */
- (!p->comm[sizeof(p->comm)-2] && strcmp(p->comm, procName) == 0)
+ pidList = xzalloc(sizeof(*pidList));
+ while ((p = procps_scan(p, PSSCAN_PID|PSSCAN_COMM|PSSCAN_ARGVN))) {
+ if (comm_match(p, procName)
/* or we require argv0 to match (essential for matching reexeced /proc/self/exe)*/
|| (p->argv0 && strcmp(bb_basename(p->argv0), procName) == 0)
/* TOOD: we can also try /proc/NUM/exe link, do we want that? */
) {
- pidList = xrealloc(pidList, sizeof(*pidList) * (i+2));
+ pidList = xrealloc_vector(pidList, 2, i);
pidList[i++] = p->pid;
}
}
diff --git a/libbb/procps.c b/libbb/procps.c
index a5168a077..f799099fd 100644
--- a/libbb/procps.c
+++ b/libbb/procps.c
@@ -78,7 +78,7 @@ const char* FAST_FUNC get_cached_groupname(gid_t gid)
#define PROCPS_BUFSIZE 1024
-static int FAST_FUNC read_to_buf(const char *filename, void *buf)
+static int read_to_buf(const char *filename, void *buf)
{
int fd;
/* open_read_close() would do two reads, checking for EOF.
@@ -385,16 +385,15 @@ procps_status_t* FAST_FUNC procps_scan(procps_status_t* sp, int flags)
n = read_to_buf(filename, buf);
if (n <= 0)
break;
-#if ENABLE_PGREP || ENABLE_PKILL
if (flags & PSSCAN_ARGVN) {
- do {
- n--;
- if (buf[n] == '\0')
- buf[n] = ' ';
- } while (n);
+ sp->argv_len = n;
+ sp->argv0 = xmalloc(n + 1);
+ memcpy(sp->argv0, buf, n + 1);
+ /* sp->argv0[n] = '\0'; - buf has it */
+ } else {
+ sp->argv_len = 0;
+ sp->argv0 = xstrdup(buf);
}
-#endif
- sp->argv0 = xstrdup(buf);
}
#endif
break;
diff --git a/procps/pgrep.c b/procps/pgrep.c
index 7b3cd8e50..0e8e5294e 100644
--- a/procps/pgrep.c
+++ b/procps/pgrep.c
@@ -111,8 +111,15 @@ int pgrep_main(int argc UNUSED_PARAM, char **argv)
if (proc->pid == pid)
continue;
cmd = proc->argv0;
- if (!cmd)
+ if (!cmd) {
cmd = proc->comm;
+ } else {
+ int i = proc->argv_len;
+ while (i) {
+ if (!cmd[i]) cmd[i] = ' ';
+ i--;
+ }
+ }
/* NB: OPT_INVERT is always 0 or 1 */
if ((regexec(&re_buffer, cmd, 1, re_match, 0) == 0 /* match found */
&& (!OPT_ANCHOR || (re_match[0].rm_so == 0 && re_match[0].rm_eo == (regoff_t)strlen(cmd)))) ^ OPT_INVERT
diff --git a/procps/pidof.c b/procps/pidof.c
index 2519473e8..780504433 100644
--- a/procps/pidof.c
+++ b/procps/pidof.c
@@ -22,7 +22,6 @@ int pidof_main(int argc UNUSED_PARAM, char **argv)
unsigned first = 1;
unsigned opt;
#if ENABLE_FEATURE_PIDOF_OMIT
- char ppid_str[sizeof(int)*3 + 1];
llist_t *omits = NULL; /* list of pids to omit */
opt_complementary = "o::";
#endif
@@ -39,8 +38,7 @@ int pidof_main(int argc UNUSED_PARAM, char **argv)
while (omits_p) {
/* are we asked to exclude the parent's process ID? */
if (strcmp(omits_p->data, "%PPID") == 0) {
- sprintf(ppid_str, "%u", (unsigned)getppid());
- omits_p->data = ppid_str;
+ omits_p->data = utoa((unsigned)getppid());
}
omits_p = omits_p->link;
}