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author | Rich Felker <dalias@aerifal.cx> | 2017-07-04 16:58:28 -0400 |
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committer | Rich Felker <dalias@aerifal.cx> | 2017-07-04 16:58:28 -0400 |
commit | f3055e0163aad1cebb0867078643b36643c5d95f (patch) | |
tree | b3ee332a4decd39b65aa930dae70e0d90b8f7036 /ldso | |
parent | 43c423af5b8453afde86e4ba81e0fcc663ae7c22 (diff) | |
download | musl-f3055e0163aad1cebb0867078643b36643c5d95f.tar.gz |
allow specifying argv[0] when invoking a program via ldso command
previously, the pathname used to load the program was always used as
argv[0]. the default remains the same, but a new --argv0 option can be
used to provide a different value.
Diffstat (limited to 'ldso')
-rw-r--r-- | ldso/dynlink.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/ldso/dynlink.c b/ldso/dynlink.c index fc6a68b8..35a90aef 100644 --- a/ldso/dynlink.c +++ b/ldso/dynlink.c @@ -1437,6 +1437,7 @@ _Noreturn void __dls3(size_t *sp) size_t aux[AUX_CNT], *auxv; size_t i; char *env_preload=0; + char *replace_argv0=0; size_t vdso_base; int argc = *sp; char **argv = (void *)(sp+1); @@ -1521,6 +1522,10 @@ _Noreturn void __dls3(size_t *sp) if (opt[7]=='=') env_preload = opt+8; else if (opt[7]) *argv = 0; else if (*argv) env_preload = *argv++; + } else if (!memcmp(opt, "argv0", 5)) { + if (opt[5]=='=') replace_argv0 = opt+6; + else if (opt[5]) *argv = 0; + else if (*argv) replace_argv0 = *argv++; } else { argv[0] = 0; } @@ -1677,6 +1682,8 @@ _Noreturn void __dls3(size_t *sp) debug.state = 0; _dl_debug_state(); + if (replace_argv0) argv[0] = replace_argv0; + errno = 0; CRTJMP((void *)aux[AT_ENTRY], argv-1); |