GNU/Linux man pages
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GNU/Linux |
CentOS 5.1 |
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initgroups(3) |
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initgroups − initialize the supplementary group access list
#include
<sys/types.h>
#include <grp.h>
int initgroups(const char *user, gid_t group);
The initgroups() function initializes the group access list by reading the group database /etc/group and using all groups of which user is a member. The additional group group is also added to the list.
The user argument must be non-NULL.
The initgroups() function returns 0 on success. On error, −1 is returned, and errno is set appropriately.
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ENOMEM |
Insufficient memory to allocate group information structure. | ||
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EPERM |
The calling process has insufficient privilege. See the underlying system call setgroups(2). |
/etc/group group database file
SVr4, 4.3BSD
The prototype for initgroups() is only available if _BSD_SOURCE is defined.
getgroups(2), setgroups(2)
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initgroups(3) | |