feat(connect): initial commit
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de21aa2788
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#include <stdio.h>
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#include <libpq-fe.h>
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int pg_connect(char* conninfo, PGconn** conn)
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{
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*conn = PQconnectdb(conninfo);
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if (PQstatus(*conn) != CONNECTION_OK) {
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fprintf(stderr,
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"ERROR: Connection to database failed: %s",
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PQerrorMessage(*conn));
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return 0;
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}
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return 1;
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}
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/* set correctely your values here */
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#define PG_HOST "127.0.0.1"
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//#define PG_USER "postgres"
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//#define PG_DB "postgres"
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//#define PG_PASS "postgres"
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//#define PG_PORT 5432
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int main(int argc, char *argv[])
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{
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/*declarations*/
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char conninfo[250];
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PGconn *conn = NULL;
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sprintf(conninfo,
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"user=%s password=%s dbname=%s hostaddr=%s port=%d",
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PG_USER, PG_PASS, PG_DB, PG_HOST, PG_PORT);
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printf("main() conninfo: %s\n",conninfo);
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if (!pg_connect(conninfo, &conn)) {
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printf("main() go to end\n");
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goto end;
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}else{
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printf("main() go NOT to end\n");
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}
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/*
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Here fit your staff
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*/
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int isThreadSafe=0;
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printf("main() Started...\n");
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isThreadSafe=PQisthreadsafe();
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if(isThreadSafe==1){
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printf("main() libpq is thread-safe\n");
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}else{
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printf("main() libpq is NOT thread-safe\n");
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}
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printf("main() Done.\n");
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end:
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PQfinish(conn);
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return 0;
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}
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@ -0,0 +1,24 @@
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# Docu
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#
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#$@ is the name of the file to be made
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#$? is the names of the changed dependents
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#$< the name of the related file that caused the action
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#$* the prefix shared by target and dependent files
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#
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# Others
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RM = /bin/rm -f
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#
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# Source, Executable, Includes, Library Defines
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EXE = main
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#
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# Compiler, Linker Defines
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CC = /usr/bin/gcc
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#
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all: main.o
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$(CC) main.c -I/usr/include/postgresql -L/usr/lib/x86_64-linux-gnu -lpq -std=c99 -Wall -o $(EXE)
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#
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main.o:
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$(CC) -c main.c -I/usr/include/postgresql
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# Clean Up Objects, Exectuables, Dumps out of source directory
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clean:
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$(RM) *.o $(EXE) *~
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@ -0,0 +1,19 @@
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* install dependencies on Debian Bullseye
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```
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sudo apt install libpq-dev --no-install-recommends
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```
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* build
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```
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make
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```
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* run
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```
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./main 'postgresql://<user>:<secret>@<host>:<port>/<database>'
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```
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* or run
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```
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./main "host=<host> port=<port> user=<user> password=<<secret>> dbname=<database>"
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```
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