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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2021-12-30 21:25:24 +0100 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2021-12-31 08:54:41 +0100 |
| commit | 33e8e95cbd0d6724553f390142d4b11352d59dd0 (patch) | |
| tree | 62f19fa9400d3dd952525fefa09c56703d06ec4f | |
| parent | 4dfa8f4870c862540bd9b09130a68664d45f1569 (diff) | |
| download | glibc-33e8e95cbd0d6724553f390142d4b11352d59dd0.zip glibc-33e8e95cbd0d6724553f390142d4b11352d59dd0.tar.gz glibc-33e8e95cbd0d6724553f390142d4b11352d59dd0.tar.bz2 | |
hurd: Make getrandom a stub inside the random translator
glibc uses /dev/urandom for getrandom(), and from version 2.34 malloc
initialization uses it. We have to detect when we are running the random
translator itself, in which case we can't read ourself.
| -rw-r--r-- | sysdeps/mach/hurd/getrandom.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/getrandom.c b/sysdeps/mach/hurd/getrandom.c index 645f293..24f9ac6 100644 --- a/sysdeps/mach/hurd/getrandom.c +++ b/sysdeps/mach/hurd/getrandom.c @@ -21,6 +21,8 @@ #include <unistd.h> #include <not-cancel.h> +extern char *trivfs_server_name __attribute__((weak)); + /* Write up to LENGTH bytes of randomness starting at BUFFER. Return the number of bytes written, or -1 on error. */ ssize_t @@ -31,6 +33,17 @@ __getrandom (void *buffer, size_t length, unsigned int flags) size_t amount_read; int fd; + if (&trivfs_server_name && trivfs_server_name + && trivfs_server_name[0] == 'r' + && trivfs_server_name[1] == 'a' + && trivfs_server_name[2] == 'n' + && trivfs_server_name[3] == 'd' + && trivfs_server_name[4] == 'o' + && trivfs_server_name[5] == 'm' + && trivfs_server_name[6] == '\0') + /* We are random, don't try to read ourselves! */ + return length; + if (flags & GRND_RANDOM) random_source = "/dev/random"; |