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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:17:33 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:17:33 +0000 |
commit | 5e45211a64149b3c659b90ff2de6fa982a5a93ed (patch) | |
tree | 739caf8c461053357daa9f162bef34516c7bf452 /src/port/setenv.c | |
parent | Initial commit. (diff) | |
download | postgresql-15-5e45211a64149b3c659b90ff2de6fa982a5a93ed.tar.xz postgresql-15-5e45211a64149b3c659b90ff2de6fa982a5a93ed.zip |
Adding upstream version 15.5.upstream/15.5
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/port/setenv.c')
-rw-r--r-- | src/port/setenv.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/port/setenv.c b/src/port/setenv.c new file mode 100644 index 0000000..d13c882 --- /dev/null +++ b/src/port/setenv.c @@ -0,0 +1,48 @@ +/*------------------------------------------------------------------------- + * + * setenv.c + * setenv() emulation for machines without it + * + * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group + * Portions Copyright (c) 1994, Regents of the University of California + * + * + * IDENTIFICATION + * src/port/setenv.c + * + *------------------------------------------------------------------------- + */ + +#include "c.h" + + +int +setenv(const char *name, const char *value, int overwrite) +{ + char *envstr; + + /* Error conditions, per POSIX */ + if (name == NULL || name[0] == '\0' || strchr(name, '=') != NULL || + value == NULL) + { + errno = EINVAL; + return -1; + } + + /* No work if variable exists and we're not to replace it */ + if (overwrite == 0 && getenv(name) != NULL) + return 0; + + /* + * Add or replace the value using putenv(). This will leak memory if the + * same variable is repeatedly redefined, but there's little we can do + * about that when sitting atop putenv(). + */ + envstr = (char *) malloc(strlen(name) + strlen(value) + 2); + if (!envstr) /* not much we can do if no memory */ + return -1; + + sprintf(envstr, "%s=%s", name, value); + + return putenv(envstr); +} |