diff options
Diffstat (limited to 'linux-user/main.c')
| -rw-r--r-- | linux-user/main.c | 50 |
1 files changed, 34 insertions, 16 deletions
diff --git a/linux-user/main.c b/linux-user/main.c index 732524face..2841120430 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -32,6 +32,9 @@ /* For tb_lock */ #include "exec-all.h" + +#include "envlist.h" + #define DEBUG_LOGFILE "/tmp/qemu.log" static const char *interp_prefix = CONFIG_QEMU_PREFIX; @@ -2186,6 +2189,8 @@ static void usage(void) "-s size set the stack size in bytes (default=%ld)\n" "-cpu model select CPU (-cpu ? for list)\n" "-drop-ld-preload drop LD_PRELOAD for target process\n" + "-E var=value sets/modifies targets environment variable(s)\n" + "-U var unsets targets environment variable(s)\n" "\n" "Debug options:\n" "-d options activate log (logfile=%s)\n" @@ -2195,6 +2200,12 @@ static void usage(void) "Environment variables:\n" "QEMU_STRACE Print system calls and arguments similar to the\n" " 'strace' program. Enable by setting to any value.\n" + "You can use -E and -U options to set/unset environment variables\n" + "for target process. It is possible to provide several variables\n" + "by repeating the option. For example:\n" + " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n" + "Note that if you provide several changes to single variable\n" + "last change will stay in effect.\n" , TARGET_ARCH, interp_prefix, @@ -2229,8 +2240,8 @@ int main(int argc, char **argv, char **envp) int optind; const char *r; int gdbstub_port = 0; - int drop_ld_preload = 0, environ_count = 0; - char **target_environ, **wrk, **dst; + char **target_environ, **wrk; + envlist_t *envlist = NULL; if (argc <= 1) usage(); @@ -2240,6 +2251,16 @@ int main(int argc, char **argv, char **envp) /* init debug */ cpu_set_log_filename(DEBUG_LOGFILE); + if ((envlist = envlist_create()) == NULL) { + (void) fprintf(stderr, "Unable to allocate envlist\n"); + exit(1); + } + + /* add current environment into the list */ + for (wrk = environ; *wrk != NULL; wrk++) { + (void) envlist_setenv(envlist, *wrk); + } + cpu_model = NULL; optind = 1; for(;;) { @@ -2269,6 +2290,14 @@ int main(int argc, char **argv, char **envp) exit(1); } cpu_set_log(mask); + } else if (!strcmp(r, "E")) { + r = argv[optind++]; + if (envlist_setenv(envlist, r) != 0) + usage(); + } else if (!strcmp(r, "U")) { + r = argv[optind++]; + if (envlist_unsetenv(envlist, r) != 0) + usage(); } else if (!strcmp(r, "s")) { r = argv[optind++]; x86_stack_size = strtol(r, (char **)&r, 0); @@ -2301,7 +2330,7 @@ int main(int argc, char **argv, char **envp) _exit(1); } } else if (!strcmp(r, "drop-ld-preload")) { - drop_ld_preload = 1; + (void) envlist_unsetenv(envlist, "LD_PRELOAD"); } else if (!strcmp(r, "strace")) { do_strace = 1; } else @@ -2369,19 +2398,8 @@ int main(int argc, char **argv, char **envp) do_strace = 1; } - wrk = environ; - while (*(wrk++)) - environ_count++; - - target_environ = malloc((environ_count + 1) * sizeof(char *)); - if (!target_environ) - abort(); - for (wrk = environ, dst = target_environ; *wrk; wrk++) { - if (drop_ld_preload && !strncmp(*wrk, "LD_PRELOAD=", 11)) - continue; - *(dst++) = strdup(*wrk); - } - *dst = NULL; /* NULL terminate target_environ */ + target_environ = envlist_to_environ(envlist, NULL); + envlist_free(envlist); if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) { printf("Error loading %s\n", filename); |