1getexeccon(3)              SELinux API documentation             getexeccon(3)
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NAME

6       getexeccon,  setexeccon  - get or set the SELinux security context used
7       for executing a new process.
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9       rpm_execcon - run a helper for rpm in an appropriate security context
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SYNOPSIS

13       #include <selinux/selinux.h>
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15       int getexeccon(security_context_t *context);
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17       int setexeccon(security_context_t context);
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19       int rpm_execcon(unsigned  int  verified,  const  char  *filename,  char
20       *const argv[] , char *const envp[]);
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DESCRIPTION

24       getexeccon  retrieves  the  context  used  for executing a new process.
25       This returned context should be freed with freecon if non-NULL.  getex‐
26       eccon  sets  *con to NULL if no exec context has been explicitly set by
27       the program (i.e. using the default policy behavior).
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29       setexeccon sets the context used for the next execve call.  NULL can be
30       passed to setexeccon to reset to the default policy behavior.  The exec
31       context is automatically reset after the  next  execve,  so  a  program
32       doesn't need to explicitly sanitize it upon startup.
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35       setexeccon  can  be  applied prior to library functions that internally
36       perform an execve, e.g. execl*, execv*, popen, in order to set an  exec
37       context for that operation.
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40       Note:  Signal  handlers  that perform an execve must take care to save,
41       reset, and restore the exec context to avoid unexpected behavior.
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44       rpm_execcon runs a helper for rpm in an appropriate  security  context.
45       The  verified  parameter should contain the return code from the signa‐
46       ture verification (0 == ok, 1 == notfound, 2 == verifyfail, 3  ==  not‐
47       trusted,  4 == nokey), although this information is not yet used by the
48       function.  The function determines the proper security context for  the
49       helper  based  on  policy,  sets the exec context accordingly, and then
50       executes the specified filename with the provided argument and environ‐
51       ment arrays.
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RETURN VALUE

56       On error -1 is returned.
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58       On  success  getexeccon  and  setexeccon  returns  0.  rpm_execcon only
59       returns upon errors, as it calls execve(2).
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SEE ALSO

63       selinux(8), freecon(3), getcon(3)
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69russell@coker.com.au            1 January 2004                   getexeccon(3)
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