GNU/Linux man pages
Livre :
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Syntaxe et mise en oeuvre :
GNU/Linux |
CentOS 5.2 |
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getsid(2) |
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getsid − get session ID
#include <unistd.h>
pid_t getsid(pid_t pid);
getsid(0) returns the session ID of the calling process. getsid(p) returns the session ID of the process with process ID p. (The session ID of a process is the process group ID of the session leader.) On error, (pid_t) −1 will be returned, and errno is set appropriately.
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EPERM |
A process with process ID p exists, but it is not in the same session as the current process, and the implementation considers this an error. | ||
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ESRCH |
No process with process ID p was found. |
SVr4, POSIX.1-2001.
Linux does not return EPERM.
Linux has this system call since Linux 1.3.44. There is libc support since libc 5.2.19.
To get the prototype under glibc, define both _XOPEN_SOURCE and _XOPEN_SOURCE_EXTENDED, or use "#define _XOPEN_SOURCE n" for some integer n larger than or equal to 500.
getpgid(2), setsid(2), feature_test_macros(7)
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getsid(2) | |