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author | 2011-11-03 07:13:44 -0400 | |
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committer | 2011-11-03 07:13:44 -0400 | |
commit | 4c796b141f0c1f246371d54a3de83931b603f82b (patch) | |
tree | aaa81c8799ab09012c77b14e7a6c7c06f0196752 /src | |
parent | TODO: updated (diff) | |
download | elfix-4c796b141f0c1f246371d54a3de83931b603f82b.tar.gz elfix-4c796b141f0c1f246371d54a3de83931b603f82b.tar.bz2 elfix-4c796b141f0c1f246371d54a3de83931b603f82b.zip |
src/paxctl-ng.c: if open(O_RDWR) fails, PT_PAX is readonly
Diffstat (limited to 'src')
-rw-r--r-- | src/paxctl-ng.c | 35 |
1 files changed, 22 insertions, 13 deletions
diff --git a/src/paxctl-ng.c b/src/paxctl-ng.c index 2b0946a..d3ddb2f 100644 --- a/src/paxctl-ng.c +++ b/src/paxctl-ng.c @@ -451,15 +451,18 @@ set_xt_flags(int fd, uint16_t xt_flags) void -set_flags(int fd, uint16_t *pax_flags) +set_flags(int fd, uint16_t *pax_flags, int rdwr_pt_pax) { uint16_t flags; - flags = get_pt_flags(fd); - if( flags == UINT16_MAX ) - flags = PF_NOEMUTRAMP | PF_NORANDEXEC; - flags = update_flags( flags, *pax_flags); - set_pt_flags(fd, flags); + if(rdwr_pt_pax) + { + flags = get_pt_flags(fd); + if( flags == UINT16_MAX ) + flags = PF_NOEMUTRAMP | PF_NORANDEXEC; + flags = update_flags( flags, *pax_flags); + set_pt_flags(fd, flags); + } flags = get_xt_flags(fd); if( flags == UINT16_MAX ) @@ -470,7 +473,7 @@ set_flags(int fd, uint16_t *pax_flags) void -create_xt_flag(fd, cp_flags) +create_xt_flags(fd, cp_flags) { uint16_t xt_flags; @@ -485,7 +488,7 @@ create_xt_flag(fd, cp_flags) void -copy_xt_flag(fd, cp_flags) +copy_xt_flags(fd, cp_flags) { uint16_t flags; if(cp_flags == 3) @@ -508,20 +511,26 @@ main( int argc, char *argv[]) int fd; uint16_t flags; int view_flags, cp_flags; + int rdwr_pt_pax = 1; f_name = parse_cmd_args(argc, argv, &flags, &view_flags, &cp_flags); if((fd = open(f_name, O_RDWR)) < 0) - error(EXIT_FAILURE, 0, "open() fail."); + { + rdwr_pt_pax = 0; + printf("open(O_RDWR) failed: cannot change PT_PAX flags\n"); + if((fd = open(f_name, O_RDONLY)) < 0) + error(EXIT_FAILURE, 0, "open() failed"); + } if(cp_flags == 1 || cp_flags == 2) - create_xt_flag(fd, cp_flags); + create_xt_flags(fd, cp_flags); - if(cp_flags == 3 || cp_flags == 4) - copy_xt_flag(fd, cp_flags); + if(cp_flags == 3 || (cp_flags == 4 && rdwr_pt_pax)) + copy_xt_flags(fd, cp_flags); if(flags != 1) - set_flags(fd, &flags); + set_flags(fd, &flags, rdwr_pt_pax); if(view_flags == 1) print_flags(fd); |