diff options
Diffstat (limited to 'libc-top-half/musl/src/passwd/getgr_r.c')
-rw-r--r-- | libc-top-half/musl/src/passwd/getgr_r.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/passwd/getgr_r.c b/libc-top-half/musl/src/passwd/getgr_r.c new file mode 100644 index 0000000..f3e8f60 --- /dev/null +++ b/libc-top-half/musl/src/passwd/getgr_r.c @@ -0,0 +1,49 @@ +#include "pwf.h" +#include <pthread.h> + +#define FIX(x) (gr->gr_##x = gr->gr_##x-line+buf) + +static int getgr_r(const char *name, gid_t gid, struct group *gr, char *buf, size_t size, struct group **res) +{ + char *line = 0; + size_t len = 0; + char **mem = 0; + size_t nmem = 0; + int rv = 0; + size_t i; + int cs; + + pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs); + + rv = __getgr_a(name, gid, gr, &line, &len, &mem, &nmem, res); + if (*res && size < len + (nmem+1)*sizeof(char *) + 32) { + *res = 0; + rv = ERANGE; + } + if (*res) { + buf += (16-(uintptr_t)buf)%16; + gr->gr_mem = (void *)buf; + buf += (nmem+1)*sizeof(char *); + memcpy(buf, line, len); + FIX(name); + FIX(passwd); + for (i=0; mem[i]; i++) + gr->gr_mem[i] = mem[i]-line+buf; + gr->gr_mem[i] = 0; + } + free(mem); + free(line); + pthread_setcancelstate(cs, 0); + if (rv) errno = rv; + return rv; +} + +int getgrnam_r(const char *name, struct group *gr, char *buf, size_t size, struct group **res) +{ + return getgr_r(name, 0, gr, buf, size, res); +} + +int getgrgid_r(gid_t gid, struct group *gr, char *buf, size_t size, struct group **res) +{ + return getgr_r(0, gid, gr, buf, size, res); +} |