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Change working directory before calling pcapd under su.

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Some implementation of Android su will reset environment variables, so
the current working directory will not be preserved.

To make sure the creation of pid file and log file, change working
directory manually.
This commit is contained in:
jackyzy823 2024-09-11 10:52:07 +08:00
parent dc3bb39168
commit 9be48af56b
1 changed files with 7 additions and 0 deletions
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7
app/src/main/jni/common/utils.c
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@ -240,6 +240,13 @@ int start_subprocess(const char *prog, const char *args, bool as_root, int* out_
close(in_p[0]);
// write "su" command input
if(as_root) {
char* cwd = getcwd(NULL, 0);
log_d("start_subprocess[%d]: cd %s", pid, cwd);
write(in_p[1], "cd ",3);
write(in_p[1], cwd, strlen(cwd));
write(in_p[1], "\n", 1);
}
log_d("start_subprocess[%d]: %s %s", pid, prog, args);
write(in_p[1], prog, strlen(prog));
write(in_p[1], " ", 1);