36 lines
547 B
C
36 lines
547 B
C
/*
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initgroups.c
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*/
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#include <sys/param.h>
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#define setgroups _setgroups
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#include <unistd.h>
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#include <string.h>
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#include <grp.h>
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int initgroups(const char *name, gid_t basegid)
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{
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struct group *gr;
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int r, n = 0;
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gid_t groups[NGROUPS];
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if((r = setgid(basegid)) < 0)
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return(r);
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setgrent();
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while ((gr = getgrent()) != NULL && (n + 1) <= NGROUPS) {
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char **mem;
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for(mem = gr->gr_mem; mem && *mem; mem++) {
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if(!strcmp(name, *mem)) {
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groups[n++] = gr->gr_gid;
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break;
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}
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}
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}
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endgrent();
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return setgroups(n, groups);
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}
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