diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2023-03-21 13:03:42 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2023-03-21 13:03:56 -0400 |
| commit | b0d8f2d983cb25d1035fae1cd7de214dd67809b4 (patch) | |
| tree | 765a0ea3579a960f3574a38e229338011b804e3a /src/common/wait_error.c | |
| parent | 0f85db92b9ea167d3b9e90f3fb5fb3b9a93babc2 (diff) | |
| download | postgresql-b0d8f2d983cb25d1035fae1cd7de214dd67809b4.tar.gz postgresql-b0d8f2d983cb25d1035fae1cd7de214dd67809b4.zip | |
Add SHELL_ERROR and SHELL_EXIT_CODE magic variables to psql.
These are set after a \! command or a backtick substitution.
SHELL_ERROR is just "true" for error (nonzero exit status) or "false"
for success, while SHELL_EXIT_CODE records the actual exit status
following standard shell/system(3) conventions.
Corey Huinker, reviewed by Maxim Orlov and myself
Discussion: https://postgr.es/m/CADkLM=cWao2x2f+UDw15W1JkVFr_bsxfstw=NGea7r9m4j-7rQ@mail.gmail.com
Diffstat (limited to 'src/common/wait_error.c')
| -rw-r--r-- | src/common/wait_error.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/common/wait_error.c b/src/common/wait_error.c index 4a3c3c61af1..a90b745f077 100644 --- a/src/common/wait_error.c +++ b/src/common/wait_error.c @@ -127,3 +127,22 @@ wait_result_is_any_signal(int exit_status, bool include_command_not_found) return true; return false; } + +/* + * Return the shell exit code (normally 0 to 255) that corresponds to the + * given wait status. The argument is a wait status as returned by wait(2) + * or waitpid(2), which also applies to pclose(3) and system(3). To support + * the latter two cases, we pass through "-1" unchanged. + */ +int +wait_result_to_exit_code(int exit_status) +{ + if (exit_status == -1) + return -1; /* failure of pclose() or system() */ + if (WIFEXITED(exit_status)) + return WEXITSTATUS(exit_status); + if (WIFSIGNALED(exit_status)) + return 128 + WTERMSIG(exit_status); + /* On many systems, this is unreachable */ + return -1; +} |