Created
November 3, 2015 09:24
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Decodes a /proc/PID/status capabilities mask.
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/* | |
* Compile just with `gcc -o cap1 cap1.c` | |
*/ | |
#include <stdio.h> | |
#include <stdlib.h> | |
char *get_cap_name(unsigned short cap_index) | |
{ | |
static char *dict[] = { | |
"CAP_CHMOD", | |
"CAP_DAC_OVERRIDE", | |
"CAP_DAC_READ_SEARCH", | |
"CAP_FOWNER", | |
"CAP_FSETID", | |
"CAP_KILL", | |
"CAP_SETGID", | |
"CAP_SETUID", | |
"CAP_SETPCAP", | |
"CAP_LINUX_IMMUTABLE", | |
"CAP_NET_BIND_SERVICE", | |
"CAP_NET_BROADCAST", | |
"CAP_NET_ADMIN", | |
"CAP_NET_RAW", | |
"CAP_IPC_LOCK", | |
"CAP_IPC_OWNER", | |
"CAP_SYS_MODULE", | |
"CAP_SYS_RAWIO", | |
"CAP_SYS_CHROOT", | |
"CAP_SYS_PTRACE", | |
"CAP_SYS_PACCT", | |
"CAP_SYS_ADMIN", | |
"CAP_SYS_BOOT", | |
"CAP_SYS_NICE", | |
"CAP_SYS_RESOURCE", | |
"CAP_SYS_TIME", | |
"CAP_SYS_TTY_CONFIG", | |
"CAP_MKNOD", | |
"CAP_LEASE", | |
"CAP_AUDIT_WRITE", | |
"CAP_AUDIT_CONTROL", | |
"CAP_SETFCAP", | |
"CAP_MAC_OVERRIDE", | |
"CAP_MAC_ADMIN", | |
"CAP_SYSLOG", | |
"CAP_WAKE_ALARM", | |
"CAP_BLOCK_SUSPEND" | |
}; | |
return dict[cap_index]; | |
} | |
int main(int argc, char **argv) | |
{ | |
if (argc != 2) { | |
fprintf(stderr, | |
"Syntax: %s hexa-cap-code.\n", argv[0]); | |
exit(EXIT_FAILURE); | |
} | |
unsigned long long cap, mask; | |
unsigned short is_enabled, i; | |
char *cap_status, *cap_name; | |
cap = strtoull(argv[1], NULL, 16); | |
printf("capab.: %016llx\n", cap); | |
for(mask=1, i=0; i<32; i++, mask<<=1) { | |
//printf("mask: %016llx\n", mask); | |
is_enabled = (cap & mask) != 0; | |
cap_status = is_enabled?"enabled":"disabled"; | |
cap_name = get_cap_name(i); | |
printf("%s(%d) is %s.\n", cap_name, i, cap_status); | |
} | |
exit(EXIT_SUCCESS); | |
} |
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