mirror of
https://github.com/fluencelabs/musl
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25 lines
529 B
C
25 lines
529 B
C
#define _GNU_SOURCE
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#include <grp.h>
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#include <string.h>
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#include <limits.h>
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int getgrouplist(const char *user, gid_t gid, gid_t *groups, int *ngroups)
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{
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size_t n, i;
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struct group *gr;
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if (*ngroups<1) return -1;
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n = *ngroups;
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*groups++ = gid;
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*ngroups = 1;
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setgrent();
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while ((gr = getgrent()) && *ngroups < INT_MAX) {
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for (i=0; gr->gr_mem[i] && strcmp(user, gr->gr_mem[i]); i++);
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if (!gr->gr_mem[i]) continue;
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if (++*ngroups <= n) *groups++ = gr->gr_gid;
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}
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endgrent();
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return *ngroups > n ? -1 : *ngroups;
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}
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