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dump: Allow parasite-dumper to write pages with non-privileged process

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Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
This commit is contained in:
Cyrill Gorcunov 2011-10-03 11:52:13 +04:00
parent 8bbed96981
commit f170895975
2 changed files with 6 additions and 2 deletions
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3
include/crtools.h
View file

@ -15,7 +15,8 @@ int cr_restore_tasks(pid_t pid, bool leader_only, int leave_stopped);
int cr_show(unsigned long pid, bool leader_only);
int convert_to_elf(char *elf_path, int fd_core);
#define CR_FD_PERM 0600
#define CR_FD_PERM (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH)
#define CR_FD_PERM_DUMP (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)
enum {
CR_FD_FDINFO,

5
parasite-syscall.c
View file

@ -242,6 +242,8 @@ int parasite_dump_pages_seized(struct parasite_ctl *ctl, struct list_head *vma_a
goto err;
}
jerr(fchmod(cr_fdset->desc[fd_type].fd, CR_FD_PERM_DUMP), err);
jerr(ptrace(PTRACE_GETREGS, ctl->pid, NULL, &regs_orig), err);
parasite_arg.command = PARASITE_CMD_DUMPPAGES;
@ -251,7 +253,7 @@ int parasite_dump_pages_seized(struct parasite_ctl *ctl, struct list_head *vma_a
strncpy(parasite_dumppages.open_path, cr_fdset->desc[fd_type].name,
sizeof(parasite_dumppages.open_path));
parasite_dumppages.open_flags = O_WRONLY;
parasite_dumppages.open_mode = CR_FD_PERM;
parasite_dumppages.open_mode = CR_FD_PERM_DUMP;
parasite_dumppages.fd = -1UL;
/*
@ -384,6 +386,7 @@ err_restore:
if (ptrace(PTRACE_SETREGS, (long)ctl->pid, NULL, &regs_orig))
pr_panic("Can't restore registers (pid: %d)\n", ctl->pid);
jerr(fchmod(cr_fdset->desc[fd_type].fd, CR_FD_PERM), err);
err:
pr_info("----------------------------------------\n");