如何在linux中获取当前进程名称？
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How to get current process name in linux?
提问by Mariusz
How can I get the process name in C? The same name, which is in /proc/$pid/status. I do not want to parse that file. Is there any programmatic way of doing this?
如何在 C 中获取进程名称？同名，在/proc/$pid/status. 我不想解析那个文件。有没有任何程序化的方式来做到这一点？
采纳答案by Michael Krelin - hacker
It's either pointed to by the argv[0]or indeed you can read /proc/self/status. Or you can use getenv("_"), not sure who sets that and how reliable it is.
它要么由 指向，argv[0]要么确实可以阅读/proc/self/status。或者您可以使用getenv("_")，不确定是谁设置的以及它的可靠性。
回答by Borealid
Look at the value of argv[0]which was passed to main. This should be the name under which your process was invoked.
查看argv[0]传递给的值main。这应该是调用您的流程的名称。
回答by raj_gt1
You can use __progname. However it is not better than argv[0]as it may have portability issues. But as you do not have access to argv[0]it can work as follows:-
您可以使用__progname. 然而，它并不比argv[0]它更好，因为它可能存在可移植性问题。但由于您无权访问argv[0]它，可以按如下方式工作：-
extern char *__progname;
printf("\n%s", __progname);
回答by Pierre Habouzit
If you're on using a glibc, then:
如果您使用的是 glibc，则：
#define _GNU_SOURCE
#include <errno.h>
extern char *program_invocation_name;
extern char *program_invocation_short_name;
See program_invocation_name(3)
见 program_invocation_name(3)
Under most Unices, __prognameis also defined by the libc.
The sole portable way is to use argv[0]
大多数Unices下，__progname也是由libc定义的。唯一的便携方式是使用argv[0]
回答by RLT
I often make use of following call,
我经常使用以下电话，
char* currentprocname = getprogname();
回答by SIGSEGV
If you cannot access argv[] in main(), because you are implementing a library, you can have a look at my answer on a similar question here.
如果您无法在 main() 中访问 argv[]，因为您正在实现一个库，您可以在此处查看我对类似问题的回答。
It basically boils down into giving you access to argc, argv[] and envp[] outside of main(). Then you could, as others have already correctly suggested, use argv[0] to retrieve the process name.
它基本上归结为让您可以访问 main() 之外的 argc、argv[] 和 envp[]。然后，正如其他人已经正确建议的那样，您可以使用 argv[0] 来检索进程名称。
回答by Ales Teska
This is a version that works on macOS, FreeBSD and Linux.
这是一个适用于 macOS、FreeBSD 和 Linux 的版本。
#if defined(__APPLE__) || defined(__FreeBSD__)
const char * appname = getprogname();
#elif defined(_GNU_SOURCE)
const char * appname = program_invocation_name;
#else
const char * appname = "?";
#endif
