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Message type for PM_SYSUNAME

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Change-Id: I58bd2987393ea56e1886fbce70b4b2c26af4ef2b
This commit is contained in:
Lionel Sambuc 2014-05-13 11:31:36 +02:00
parent 345b3b5114
commit a297e52a32
4 changed files with 25 additions and 21 deletions
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6
include/minix/callnr.h
View file

@ -64,12 +64,6 @@
/* Field names for the exit(2) call. */
#define PM_EXIT_STATUS m1_i1 /* int */
/* Field names for the sysuname(2) call. */
#define PM_SYSUNAME_REQ m1_i1 /* int */
#define PM_SYSUNAME_FIELD m1_i2 /* int */
#define PM_SYSUNAME_LEN m1_i3 /* char * */
#define PM_SYSUNAME_VALUE m1_p1 /* size_t */
/* Field names for the execve(2) call. */
#define PM_EXEC_NAME m1_p1 /* const char * */
#define PM_EXEC_NAMELEN m1_i1 /* size_t */

11
include/minix/ipc.h
View file

@ -171,6 +171,16 @@ typedef struct {
} mess_pm_lc_ptrace;
_ASSERT_MSG_SIZE(mess_pm_lc_ptrace);
typedef struct {
int req;
int field;
size_t len;
vir_bytes value;
uint8_t padding[40];
} mess_lc_pm_sysuname;
_ASSERT_MSG_SIZE(mess_lc_pm_sysuname);
typedef struct {
time_t sec;
@ -950,6 +960,7 @@ typedef struct {
mess_lc_pm_itimer m_lc_pm_itimer;
mess_lc_pm_ptrace m_lc_pm_ptrace;
mess_lc_pm_sysuname m_lc_pm_sysuname;
mess_lc_pm_time m_lc_pm_time;
mess_lc_pm_waitpid m_lc_pm_waitpid;

8
lib/libc/sys-minix/sysuname.c
View file

@ -13,10 +13,10 @@ int sysuname(int req, int field, char *value, size_t len)
message m;
memset(&m, 0, sizeof(m));
m.PM_SYSUNAME_REQ = req;
m.PM_SYSUNAME_FIELD = field;
m.PM_SYSUNAME_LEN = len;
m.PM_SYSUNAME_VALUE = value;
m.m_lc_pm_sysuname.req = req;
m.m_lc_pm_sysuname.field = field;
m.m_lc_pm_sysuname.len = len;
m.m_lc_pm_sysuname.value = (vir_bytes)value;
return _syscall(PM_PROC_NR, PM_SYSUNAME, &m);
}

21
servers/pm/misc.c
View file

@ -81,32 +81,31 @@ int do_sysuname()
};
#endif
if ((unsigned) m_in.PM_SYSUNAME_FIELD >= _UTS_MAX) return(EINVAL);
if (m_in.m_lc_pm_sysuname.field >= _UTS_MAX) return(EINVAL);
string = uts_tbl[m_in.PM_SYSUNAME_FIELD];
string = uts_tbl[m_in.m_lc_pm_sysuname.field];
if (string == NULL)
return EINVAL; /* Unsupported field */
switch (m_in.PM_SYSUNAME_REQ) {
switch (m_in.m_lc_pm_sysuname.req) {
case _UTS_GET:
/* Copy an uname string to the user. */
n = strlen(string) + 1;
if (n > m_in.PM_SYSUNAME_LEN) n = m_in.PM_SYSUNAME_LEN;
r = sys_datacopy(SELF, (phys_bytes) string,
mp->mp_endpoint, (phys_bytes) m_in.PM_SYSUNAME_VALUE,
(phys_bytes) n);
if (n > m_in.m_lc_pm_sysuname.len) n = m_in.m_lc_pm_sysuname.len;
r = sys_datacopy(SELF, (vir_bytes)string, mp->mp_endpoint,
m_in.m_lc_pm_sysuname.value, (phys_bytes)n);
if (r < 0) return(r);
break;
#if 0 /* no updates yet */
case _UTS_SET:
/* Set an uname string, needs root power. */
len = sizes[m_in.PM_SYSUNAME_FIELD];
len = sizes[m_in.m_lc_pm_sysuname.field];
if (mp->mp_effuid != 0 || len == 0) return(EPERM);
n = len < m_in.PM_SYSUNAME_LEN ? len : m_in.PM_SYSUNAME_LEN;
n = len < m_in.m_lc_pm_sysuname.len ? len : m_in.m_lc_pm_sysuname.len;
if (n <= 0) return(EINVAL);
r = sys_datacopy(mp->mp_endpoint, (phys_bytes) m_in.PM_SYSUNAME_VALUE,
SELF, (phys_bytes) tmp, (phys_bytes) n);
r = sys_datacopy(mp->mp_endpoint, m_in.m_lc_pm_sysuname.value, SELF,
(phys_bytes)tmp, (phys_bytes)n);
if (r < 0) return(r);
tmp[n-1] = 0;
strcpy(string, tmp);