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um: Remove unused os_process_parent

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The function is not used anywhere.

Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Link: https://patch.msgid.link/20240913134442.967599-3-benjamin@sipsolutions.net
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Benjamin Berg 2024-09-13 15:44:39 +02:00 committed by Johannes Berg
parent 7852ee068a
commit 47e174969c
2 changed files with 0 additions and 40 deletions
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1
arch/um/include/shared/os.h
View File

@ -199,7 +199,6 @@ extern int create_mem_file(unsigned long long len);
extern void report_enomem(void);
/* process.c */
extern int os_process_parent(int pid);
extern void os_alarm_process(int pid);
extern void os_stop_process(int pid);
extern void os_kill_process(int pid, int reap_child);

39
arch/um/os-Linux/process.c
View File

@ -18,45 +18,6 @@
#include <longjmp.h>
#include <os.h>
#define FAILURE_PID -1
#define STAT_PATH_LEN sizeof("/proc/#######/stat\0")
#define COMM_SCANF "%*[^)])"
int os_process_parent(int pid)
{
char stat[STAT_PATH_LEN];
char data[256];
int parent = FAILURE_PID, n, fd;
if (pid == -1)
return parent;
snprintf(stat, sizeof(stat), "/proc/%d/stat", pid);
fd = open(stat, O_RDONLY, 0);
if (fd < 0) {
printk(UM_KERN_ERR "Couldn't open '%s', errno = %d\n", stat,
errno);
return parent;
}
CATCH_EINTR(n = read(fd, data, sizeof(data)));
close(fd);
if (n < 0) {
printk(UM_KERN_ERR "Couldn't read '%s', errno = %d\n", stat,
errno);
return parent;
}
parent = FAILURE_PID;
n = sscanf(data, "%*d " COMM_SCANF " %*c %d", &parent);
if (n != 1)
printk(UM_KERN_ERR "Failed to scan '%s'\n", data);
return parent;
}
void os_alarm_process(int pid)
{
kill(pid, SIGALRM);