Thanks for your comments. Unfortunately flush(stdout) didn't help. Thanks, Naresh
-----Original Message----- From: openwrt-devel [mailto:[email protected]] On Behalf Of Arjen de Korte Sent: Wednesday, March 30, 2016 4:58 PM To: [email protected] Subject: Re: [OpenWrt-Devel] stdout and putchar() behavior in musl Citeren Ram Chandra Jangir <[email protected]>: > Hi, > > Did anyone observed stdout and putchar() behavior differences between > musl & uClibc? > > I have below code snippet : > > int main(void){ > int c; > while((c=getchar())!= 'e') { > putchar(c+1); > } > return 0; > } > > When I use uClibc/gcc, I can see writing c+1 from putchar() happening > immediately. But when I use musl, character(c+1) gets printed on > console only if I exit from the program by entering 'e'. > I guess printing character using putchar family on stdio is having > bug(or different implementation) in musl. Has anybody faced this > issue? Any workaround? Apparently in uClibc stdout is unbuffered and in musl it is buffered. Either is allowed in the C-standard (it is not specified) so this is not a bug. If you want each character to be output immediately, you probably need to add flush(stdout). _______________________________________________ openwrt-devel mailing list [email protected] https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel _______________________________________________ openwrt-devel mailing list [email protected] https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
