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author | Laurent Bercot <ska-skaware@skarnet.org> | 2018-06-26 00:25:28 +0000 |
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committer | Laurent Bercot <ska-skaware@skarnet.org> | 2018-06-26 00:25:28 +0000 |
commit | 633445be1a9be37ae727c044417f5607706cf4ae (patch) | |
tree | 3c037459f5249e5c18ee5b9e41802c5964364f95 /src/libnsss/nsss_unix_grp_get.c | |
download | nsss-633445be1a9be37ae727c044417f5607706cf4ae.tar.gz nsss-633445be1a9be37ae727c044417f5607706cf4ae.tar.xz nsss-633445be1a9be37ae727c044417f5607706cf4ae.zip |
Initial commit
Diffstat (limited to 'src/libnsss/nsss_unix_grp_get.c')
-rw-r--r-- | src/libnsss/nsss_unix_grp_get.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/src/libnsss/nsss_unix_grp_get.c b/src/libnsss/nsss_unix_grp_get.c new file mode 100644 index 0000000..f7984a4 --- /dev/null +++ b/src/libnsss/nsss_unix_grp_get.c @@ -0,0 +1,62 @@ +/* ISC license. */ + +#include <string.h> +#include <pthread.h> +#include <skalibs/types.h> +#include <skalibs/genalloc.h> +#include <skalibs/skamisc.h> +#include <nsss/grp-def.h> +#include <nsss/nsss-unix.h> +#include "nsss-unix-internal.h" + +static inline char **grp_parsemem (char *s, genalloc *ga) +{ + char **grmem ; + char **p ; + size_t n = 0 ; + for (char *t = s ; *t ; t++) if (*t == ',') { n++ ; *t = 0 ; } ; + if (*s) n++ ; + if (!genalloc_readyplus(char *, ga, n+1)) return 0 ; + p = genalloc_s(char *, ga) + genalloc_len(char *, ga) ; + grmem = p ; + for (size_t i = 0 ; i < n ; i++) { *p++ = s ; s += strlen(s) + 1 ; } + *p++ = 0 ; + genalloc_setlen(char *, ga, genalloc_len(char *, ga) + n+1) ; + return grmem ; +} + +static inline int grp_parseline (struct group *gr, char *s, size_t max, genalloc *ga) +{ + struct group gr2 ; + char *p ; + s[max-1] = 0 ; + if (!nsss_unix_field(&gr2.gr_name, &s)) return 0 ; + if (!nsss_unix_field(&gr2.gr_passwd, &s)) return 0 ; + if (!nsss_unix_field(&p, &s)) return 0 ; + if (!gid0_scan(p, &gr2.gr_gid)) return 0 ; + gr2.gr_mem = grp_parsemem(s, ga) ; + if (!gr2.gr_mem) return 0 ; + *gr = gr2 ; + return 1 ; +} + +int nsss_unix_grp_get (nsss_unix_t *a, struct group *gr, stralloc *sa, genalloc *ga) +{ + int cs ; + pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs) ; + for (;;) + { + size_t sabase = sa->len ; + size_t gabase = genalloc_len(char *, ga) ; + if (skagetln_loose(&a->b, sa, '\n') <= 0) goto err ; + if (grp_parseline(gr, sa->s + sabase, sa->len - sabase, ga)) break ; + sa->len = sabase ; + genalloc_setlen(char *, ga, gabase) ; + } + pthread_setcancelstate(cs, 0) ; + return 1 ; + + err: + pthread_setcancelstate(cs, 0) ; + return 0 ; +} |