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Use libprocstat(3) to retrieve ELF auxiliary vector.

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MFC after:	1 month
This commit is contained in:
Mikolaj Golub 2013-04-20 08:15:43 +00:00
parent b18ddb2af1
commit 61e1b7c67b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=249683
3 changed files with 10 additions and 96 deletions
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2
usr.bin/procstat/procstat.c
View File

@ -81,7 +81,7 @@ procstat(struct procstat *prstat, struct kinfo_proc *kipp)
else if (vflag)
procstat_vm(prstat, kipp);
else if (xflag)
procstat_auxv(kipp);
procstat_auxv(prstat, kipp);
else
procstat_basic(kipp);
}

2
usr.bin/procstat/procstat.h
View File

@ -35,7 +35,7 @@ struct kinfo_proc;
void kinfo_proc_sort(struct kinfo_proc *kipp, int count);
void procstat_args(struct procstat *prstat, struct kinfo_proc *kipp);
void procstat_auxv(struct kinfo_proc *kipp);
void procstat_auxv(struct procstat *prstat, 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);

102
usr.bin/procstat/procstat_auxv.c
View File

@ -43,113 +43,26 @@
#include "procstat.h"
#define PROC_AUXV_MAX 256
static Elf_Auxinfo auxv[PROC_AUXV_MAX];
static char prefix[256];
#if __ELF_WORD_SIZE == 64
static Elf32_Auxinfo auxv32[PROC_AUXV_MAX];
static const char *elf32_sv_names[] = {
"Linux ELF32",
"FreeBSD ELF32",
};
static int
is_elf32(pid_t pid)
{
int error, name[4];
size_t len, i;
static char sv_name[256];
name[0] = CTL_KERN;
name[1] = KERN_PROC;
name[2] = KERN_PROC_SV_NAME;
name[3] = pid;
len = sizeof(sv_name);
error = sysctl(name, 4, sv_name, &len, NULL, 0);
if (error != 0 || len == 0)
return (0);
for (i = 0; i < sizeof(elf32_sv_names) / sizeof(*elf32_sv_names); i++) {
if (strncmp(sv_name, elf32_sv_names[i], sizeof(sv_name)) == 0)
return (1);
}
return (0);
}
static size_t
retrieve_auxv32(pid_t pid)
{
int name[4];
size_t len, i;
void *ptr;
name[0] = CTL_KERN;
name[1] = KERN_PROC;
name[2] = KERN_PROC_AUXV;
name[3] = pid;
len = sizeof(auxv32);
if (sysctl(name, 4, auxv32, &len, NULL, 0) == -1) {
if (errno != ESRCH && errno != EPERM)
warn("sysctl: kern.proc.auxv: %d: %d", pid, errno);
return (0);
}
for (i = 0; i < len; i++) {
/*
* XXX: We expect that values for a_type on a 32-bit platform
* are directly mapped to those on 64-bit one, which is not
* necessarily true.
*/
auxv[i].a_type = auxv32[i].a_type;
ptr = &auxv32[i].a_un;
auxv[i].a_un.a_val = *((uint32_t *)ptr);
}
return (len);
}
#endif /* __ELF_WORD_SIZE == 64 */
#define PRINT(name, spec, val) \
printf("%s %-16s " #spec "\n", prefix, #name, (val))
#define PRINT_UNKNOWN(type, val) \
printf("%s %16ld %#lx\n", prefix, (long)type, (u_long)(val))
static size_t
retrieve_auxv(pid_t pid)
{
int name[4];
size_t len;
#if __ELF_WORD_SIZE == 64
if (is_elf32(pid))
return (retrieve_auxv32(pid));
#endif
name[0] = CTL_KERN;
name[1] = KERN_PROC;
name[2] = KERN_PROC_AUXV;
name[3] = pid;
len = sizeof(auxv);
if (sysctl(name, 4, auxv, &len, NULL, 0) == -1) {
if (errno != ESRCH && errno != EPERM)
warn("sysctl: kern.proc.auxv: %d: %d", pid, errno);
return (0);
}
return (len);
}
void
procstat_auxv(struct kinfo_proc *kipp)
procstat_auxv(struct procstat *procstat, struct kinfo_proc *kipp)
{
size_t len, i;
Elf_Auxinfo *auxv;
u_int count, i;
static char prefix[256];
if (!hflag)
printf("%5s %-16s %-16s %-16s\n", "PID", "COMM", "AUXV", "VALUE");
len = retrieve_auxv(kipp->ki_pid);
if (len == 0)
auxv = procstat_getauxv(procstat, kipp, &count);
if (auxv == NULL)
return;
snprintf(prefix, sizeof(prefix), "%5d %-16s", kipp->ki_pid,
kipp->ki_comm);
for (i = 0; i < len; i++) {
for (i = 0; i < count; i++) {
switch(auxv[i].a_type) {
case AT_NULL:
return;
@ -242,5 +155,6 @@ procstat_auxv(struct kinfo_proc *kipp)
}
}
printf("\n");
procstat_freeauxv(procstat, auxv);
}