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author | Cameron Katri <me@cameronkatri.com> | 2021-05-09 14:20:58 -0400 |
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committer | Cameron Katri <me@cameronkatri.com> | 2021-05-09 14:20:58 -0400 |
commit | 5fd83771641d15c418f747bd343ba6738d3875f7 (patch) | |
tree | 5abf0f78f680d9837dbd93d4d4c3933bb7509599 /patch_cmds/diffstat/porting/getopt.c | |
download | apple_cmds-5fd83771641d15c418f747bd343ba6738d3875f7.tar.gz apple_cmds-5fd83771641d15c418f747bd343ba6738d3875f7.tar.zst apple_cmds-5fd83771641d15c418f747bd343ba6738d3875f7.zip |
Import macOS userland
adv_cmds-176
basic_cmds-55
bootstrap_cmds-116.100.1
developer_cmds-66
diskdev_cmds-667.40.1
doc_cmds-53.60.1
file_cmds-321.40.3
mail_cmds-35
misc_cmds-34
network_cmds-606.40.1
patch_cmds-17
remote_cmds-63
shell_cmds-216.60.1
system_cmds-880.60.2
text_cmds-106
Diffstat (limited to 'patch_cmds/diffstat/porting/getopt.c')
-rw-r--r-- | patch_cmds/diffstat/porting/getopt.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/patch_cmds/diffstat/porting/getopt.c b/patch_cmds/diffstat/porting/getopt.c new file mode 100644 index 0000000..39ed078 --- /dev/null +++ b/patch_cmds/diffstat/porting/getopt.c @@ -0,0 +1,79 @@ +/* ::[[ @(#) getopt.c 1.5 89/03/11 05:40:23 ]]:: */ +#ifndef LINT +static const char Id[] = "$Id: getopt.c,v 1.2 2009/09/01 00:41:59 tom Exp $"; +#endif + +/* + * Here's something you've all been waiting for: the AT&T public domain + * source for getopt(3). It is the code which was given out at the 1985 + * UNIFORUM conference in Dallas. I obtained it by electronic mail + * directly from AT&T. The people there assure me that it is indeed + * in the public domain. + * + * There is no manual page. That is because the one they gave out at + * UNIFORUM was slightly different from the current System V Release 2 + * manual page. The difference apparently involved a note about the + * famous rules 5 and 6, recommending using white space between an option + * and its first argument, and not grouping options that have arguments. + * Getopt itself is currently lenient about both of these things White + * space is allowed, but not mandatory, and the last option in a group can + * have an argument. That particular version of the man page evidently + * has no official existence, and my source at AT&T did not send a copy. + * The current SVR2 man page reflects the actual behavor of this getopt. + * However, I am not about to post a copy of anything licensed by AT&T. + */ + +#include <stdio.h> +#include <string.h> + +#define ERR(szz,czz) if(opterr){fprintf(stderr,"%s%s%c\n",argv[0],szz,czz);} + +int opterr = 1; +int optind = 1; +int optopt; +char *optarg; + +int +getopt(int argc, char *const *argv, const char *opts) +{ + static int sp = 1; + register int c; + register char *cp; + + if (sp == 1) { + if (optind >= argc || + argv[optind][0] != '-' || argv[optind][1] == '\0') + return (EOF); + else if (strcmp(argv[optind], "--") == 0) { + optind++; + return (EOF); + } + } + optopt = c = argv[optind][sp]; + if (c == ':' || (cp = strchr(opts, c)) == NULL) { + ERR(": illegal option -- ", c); + if (argv[optind][++sp] == '\0') { + optind++; + sp = 1; + } + return ('?'); + } + if (*++cp == ':') { + if (argv[optind][sp + 1] != '\0') + optarg = &argv[optind++][sp + 1]; + else if (++optind >= argc) { + ERR(": option requires an argument -- ", c); + sp = 1; + return ('?'); + } else + optarg = argv[optind++]; + sp = 1; + } else { + if (argv[optind][++sp] == '\0') { + sp = 1; + optind++; + } + optarg = NULL; + } + return (c); +} |