Use libprocstat(3) to retrieve process command line arguments and

environment variables.

MFC after:	1 month

3 files changed, 22 insertions, 34 deletions

diff --git a/usr.bin/procstat/procstat.c b/usr.bin/procstat/procstat.c
index 16f2c99..73c3372 100644
--- a/usr.bin/procstat/procstat.c
+++ b/usr.bin/procstat/procstat.c
@@ -61,9 +61,9 @@ procstat(struct procstat *prstat, struct kinfo_proc *kipp)
 	if (bflag)
 		procstat_bin(prstat, kipp);
 	else if (cflag)
-		procstat_args(kipp);
+		procstat_args(prstat, kipp);
 	else if (eflag)
-		procstat_env(kipp);
+		procstat_env(prstat, kipp);
 	else if (fflag)
 		procstat_files(prstat, kipp);
 	else if (iflag)
diff --git a/usr.bin/procstat/procstat.h b/usr.bin/procstat/procstat.h
index e651665..5d8d773 100644
--- a/usr.bin/procstat/procstat.h
+++ b/usr.bin/procstat/procstat.h
@@ -34,12 +34,12 @@ extern int	hflag, nflag, Cflag;
 struct kinfo_proc;
 void	kinfo_proc_sort(struct kinfo_proc *kipp, int count);
 
-void	procstat_args(struct kinfo_proc *kipp);
+void	procstat_args(struct procstat *prstat, struct kinfo_proc *kipp);
 void	procstat_auxv(struct kinfo_proc *kipp);
 void	procstat_basic(struct kinfo_proc *kipp);
 void	procstat_bin(struct procstat *prstat, struct kinfo_proc *kipp);
 void	procstat_cred(struct procstat *prstat, struct kinfo_proc *kipp);
-void	procstat_env(struct kinfo_proc *kipp);
+void	procstat_env(struct procstat *prstat, struct kinfo_proc *kipp);
 void	procstat_files(struct procstat *prstat, struct kinfo_proc *kipp);
 void	procstat_kstack(struct kinfo_proc *kipp, int kflag);
 void	procstat_rlimit(struct procstat *prstat, struct kinfo_proc *kipp);
diff --git a/usr.bin/procstat/procstat_args.c b/usr.bin/procstat/procstat_args.c
index b13aa72..342b60f 100644
--- a/usr.bin/procstat/procstat_args.c
+++ b/usr.bin/procstat/procstat_args.c
@@ -40,52 +40,40 @@
 
 #include "procstat.h"
 
-static char args[ARG_MAX];
-
 static void
-do_args(struct kinfo_proc *kipp, int env)
+do_args(struct procstat *procstat, struct kinfo_proc *kipp, int env)
 {
-	int error, name[4];
-	size_t len;
-	char *cp;
+	int i;
+	char **args;
 
-	if (!hflag)
+	if (!hflag) {
 		printf("%5s %-16s %-53s\n", "PID", "COMM",
 		    env ? "ENVIRONMENT" : "ARGS");
-
-	name[0] = CTL_KERN;
-	name[1] = KERN_PROC;
-	name[2] = env ? KERN_PROC_ENV : KERN_PROC_ARGS;
-	name[3] = kipp->ki_pid;
-	len = sizeof(args);
-	error = sysctl(name, 4, args, &len, NULL, 0);
-	if (error < 0 && errno != ESRCH && errno != EPERM) {
-		warn("sysctl: kern.proc.%s: %d: %d", env ? "env" : "args",
-		    kipp->ki_pid, errno);
-		return;
 	}
-	if (error < 0)
+
+	args = env ? procstat_getenvv(procstat, kipp, 0) :
+	    procstat_getargv(procstat, kipp, 0);
+
+	printf("%5d %-16s", kipp->ki_pid, kipp->ki_comm);
+
+	if (args == NULL) {
+		printf(" -\n");
 		return;
-	if (len == 0 || strlen(args) == 0) {
-		strcpy(args, "-");
-		len = strlen(args) + 1;
 	}
 
-	printf("%5d ", kipp->ki_pid);
-	printf("%-16s ", kipp->ki_comm);
-	for (cp = args; cp < args + len; cp += strlen(cp) + 1)
-		printf("%s%s", cp != args ? " " : "", cp);
+	for (i = 0; args[i] != NULL; i++)
+		printf(" %s", args[i]);
 	printf("\n");
 }
 
 void
-procstat_args(struct kinfo_proc *kipp)
+procstat_args(struct procstat *procstat, struct kinfo_proc *kipp)
 {
-	do_args(kipp, 0);
+	do_args(procstat, kipp, 0);
 }
 
 void
-procstat_env(struct kinfo_proc *kipp)
+procstat_env(struct procstat *procstat, struct kinfo_proc *kipp)
 {
-	do_args(kipp, 1);
+	do_args(procstat, kipp, 1);
 }