| 36 | namespace butil { |
| 37 | |
| 38 | ssize_t ReadCommandLine(char* buf, size_t len, bool with_args) { |
| 39 | #if defined(OS_LINUX) |
| 40 | butil::fd_guard fd(open("/proc/self/cmdline", O_RDONLY)); |
| 41 | if (fd < 0) { |
| 42 | LOG(ERROR) << "Fail to open /proc/self/cmdline"; |
| 43 | return -1; |
| 44 | } |
| 45 | ssize_t nr = read(fd, buf, len); |
| 46 | if (nr <= 0) { |
| 47 | LOG(ERROR) << "Fail to read /proc/self/cmdline"; |
| 48 | return -1; |
| 49 | } |
| 50 | #elif defined(OS_MACOSX) |
| 51 | static pid_t pid = getpid(); |
| 52 | std::ostringstream oss; |
| 53 | char cmdbuf[32]; |
| 54 | snprintf(cmdbuf, sizeof(cmdbuf), "ps -p %ld -o command=", (long)pid); |
| 55 | if (butil::read_command_output(oss, cmdbuf) != 0) { |
| 56 | LOG(ERROR) << "Fail to read cmdline"; |
| 57 | return -1; |
| 58 | } |
| 59 | const std::string& result = oss.str(); |
| 60 | ssize_t nr = std::min(result.size(), len); |
| 61 | memcpy(buf, result.data(), nr); |
| 62 | #else |
| 63 | #error Not Implemented |
| 64 | #endif |
| 65 | |
| 66 | if (with_args) { |
| 67 | if ((size_t)nr == len) { |
| 68 | return len; |
| 69 | } |
| 70 | for (ssize_t i = 0; i < nr; ++i) { |
| 71 | if (buf[i] == '\0') { |
| 72 | buf[i] = '\n'; |
| 73 | } |
| 74 | } |
| 75 | return nr; |
| 76 | } else { |
| 77 | for (ssize_t i = 0; i < nr; ++i) { |
| 78 | // The command in macos is separated with space and ended with '\n' |
| 79 | if (buf[i] == '\0' || buf[i] == '\n' || buf[i] == ' ') { |
| 80 | return i; |
| 81 | } |
| 82 | } |
| 83 | if ((size_t)nr == len) { |
| 84 | LOG(ERROR) << "buf is not big enough"; |
| 85 | return -1; |
| 86 | } |
| 87 | return nr; |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | ssize_t GetProcessAbsolutePath(char *buf, size_t len) { |
| 92 | #if defined(OS_LINUX) |
no test coverage detected