From c2cdf5c5892165cbe7d3567bff5930521bc52669 Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Wed, 5 Jun 2013 14:19:36 +0200 Subject: qemu-io: Move functions for registering and running commands Signed-off-by: Kevin Wolf Reviewed-by: Eric Blake Signed-off-by: Stefan Hajnoczi --- qemu-io-cmds.c | 192 ++++++++++++++++++++++++++++++++++++++++++--------------- 1 file changed, 141 insertions(+), 51 deletions(-) (limited to 'qemu-io-cmds.c') diff --git a/qemu-io-cmds.c b/qemu-io-cmds.c index fa8d9a0c38..8acc8666d0 100644 --- a/qemu-io-cmds.c +++ b/qemu-io-cmds.c @@ -16,6 +16,110 @@ int qemuio_misalign; +static cmdinfo_t *cmdtab; +static int ncmds; + +static int compare_cmdname(const void *a, const void *b) +{ + return strcmp(((const cmdinfo_t *)a)->name, + ((const cmdinfo_t *)b)->name); +} + +void qemuio_add_command(const cmdinfo_t *ci) +{ + cmdtab = g_realloc(cmdtab, ++ncmds * sizeof(*cmdtab)); + cmdtab[ncmds - 1] = *ci; + qsort(cmdtab, ncmds, sizeof(*cmdtab), compare_cmdname); +} + +int qemuio_command_usage(const cmdinfo_t *ci) +{ + printf("%s %s -- %s\n", ci->name, ci->args, ci->oneline); + return 0; +} + +static int init_check_command(BlockDriverState *bs, const cmdinfo_t *ct) +{ + if (ct->flags & CMD_FLAG_GLOBAL) { + return 1; + } + if (!(ct->flags & CMD_NOFILE_OK) && !bs) { + fprintf(stderr, "no file open, try 'help open'\n"); + return 0; + } + return 1; +} + +static int command(const cmdinfo_t *ct, int argc, char **argv) +{ + char *cmd = argv[0]; + + if (!init_check_command(qemuio_bs, ct)) { + return 0; + } + + if (argc - 1 < ct->argmin || (ct->argmax != -1 && argc - 1 > ct->argmax)) { + if (ct->argmax == -1) { + fprintf(stderr, + "bad argument count %d to %s, expected at least %d arguments\n", + argc-1, cmd, ct->argmin); + } else if (ct->argmin == ct->argmax) { + fprintf(stderr, + "bad argument count %d to %s, expected %d arguments\n", + argc-1, cmd, ct->argmin); + } else { + fprintf(stderr, + "bad argument count %d to %s, expected between %d and %d arguments\n", + argc-1, cmd, ct->argmin, ct->argmax); + } + return 0; + } + optind = 0; + return ct->cfunc(qemuio_bs, argc, argv); +} + +static const cmdinfo_t *find_command(const char *cmd) +{ + cmdinfo_t *ct; + + for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) { + if (strcmp(ct->name, cmd) == 0 || + (ct->altname && strcmp(ct->altname, cmd) == 0)) + { + return (const cmdinfo_t *)ct; + } + } + return NULL; +} + +static char **breakline(char *input, int *count) +{ + int c = 0; + char *p; + char **rval = g_malloc0(sizeof(char *)); + char **tmp; + + while (rval && (p = qemu_strsep(&input, " ")) != NULL) { + if (!*p) { + continue; + } + c++; + tmp = g_realloc(rval, sizeof(*rval) * (c + 1)); + if (!tmp) { + g_free(rval); + rval = NULL; + c = 0; + break; + } else { + rval = tmp; + } + rval[c - 1] = p; + rval[c] = NULL; + } + *count = c; + return rval; +} + static int64_t cvtnum(const char *s) { char *end; @@ -467,12 +571,12 @@ static int read_f(BlockDriverState *bs, int argc, char **argv) vflag = 1; break; default: - return command_usage(&read_cmd); + return qemuio_command_usage(&read_cmd); } } if (optind != argc - 2) { - return command_usage(&read_cmd); + return qemuio_command_usage(&read_cmd); } if (bflag && pflag) { @@ -494,7 +598,7 @@ static int read_f(BlockDriverState *bs, int argc, char **argv) } if (!Pflag && (lflag || sflag)) { - return command_usage(&read_cmd); + return qemuio_command_usage(&read_cmd); } if (!lflag) { @@ -629,12 +733,12 @@ static int readv_f(BlockDriverState *bs, int argc, char **argv) vflag = 1; break; default: - return command_usage(&readv_cmd); + return qemuio_command_usage(&readv_cmd); } } if (optind > argc - 2) { - return command_usage(&readv_cmd); + return qemuio_command_usage(&readv_cmd); } @@ -769,12 +873,12 @@ static int write_f(BlockDriverState *bs, int argc, char **argv) zflag = 1; break; default: - return command_usage(&write_cmd); + return qemuio_command_usage(&write_cmd); } } if (optind != argc - 2) { - return command_usage(&write_cmd); + return qemuio_command_usage(&write_cmd); } if (bflag + pflag + zflag > 1) { @@ -911,12 +1015,12 @@ static int writev_f(BlockDriverState *bs, int argc, char **argv) } break; default: - return command_usage(&writev_cmd); + return qemuio_command_usage(&writev_cmd); } } if (optind > argc - 2) { - return command_usage(&writev_cmd); + return qemuio_command_usage(&writev_cmd); } offset = cvtnum(argv[optind]); @@ -1023,12 +1127,12 @@ static int multiwrite_f(BlockDriverState *bs, int argc, char **argv) } break; default: - return command_usage(&writev_cmd); + return qemuio_command_usage(&writev_cmd); } } if (optind > argc - 2) { - return command_usage(&writev_cmd); + return qemuio_command_usage(&writev_cmd); } nr_reqs = 1; @@ -1257,13 +1361,13 @@ static int aio_read_f(BlockDriverState *bs, int argc, char **argv) break; default: g_free(ctx); - return command_usage(&aio_read_cmd); + return qemuio_command_usage(&aio_read_cmd); } } if (optind > argc - 2) { g_free(ctx); - return command_usage(&aio_read_cmd); + return qemuio_command_usage(&aio_read_cmd); } ctx->offset = cvtnum(argv[optind]); @@ -1349,13 +1453,13 @@ static int aio_write_f(BlockDriverState *bs, int argc, char **argv) break; default: g_free(ctx); - return command_usage(&aio_write_cmd); + return qemuio_command_usage(&aio_write_cmd); } } if (optind > argc - 2) { g_free(ctx); - return command_usage(&aio_write_cmd); + return qemuio_command_usage(&aio_write_cmd); } ctx->offset = cvtnum(argv[optind]); @@ -1547,12 +1651,12 @@ static int discard_f(BlockDriverState *bs, int argc, char **argv) qflag = 1; break; default: - return command_usage(&discard_cmd); + return qemuio_command_usage(&discard_cmd); } } if (optind != argc - 2) { - return command_usage(&discard_cmd); + return qemuio_command_usage(&discard_cmd); } offset = cvtnum(argv[optind]); @@ -1860,18 +1964,6 @@ static const cmdinfo_t help_cmd = { .oneline = "help for one or all commands", }; -static int init_check_command(BlockDriverState *bs, const cmdinfo_t *ct) -{ - if (ct->flags & CMD_FLAG_GLOBAL) { - return 1; - } - if (!(ct->flags & CMD_NOFILE_OK) && !bs) { - fprintf(stderr, "no file open, try 'help open'\n"); - return 0; - } - return 1; -} - bool qemuio_command(const char *cmd) { char *input; @@ -1899,26 +1991,24 @@ bool qemuio_command(const char *cmd) static void __attribute((constructor)) init_qemuio_commands(void) { /* initialize commands */ - add_command(&help_cmd); - add_command(&read_cmd); - add_command(&readv_cmd); - add_command(&write_cmd); - add_command(&writev_cmd); - add_command(&multiwrite_cmd); - add_command(&aio_read_cmd); - add_command(&aio_write_cmd); - add_command(&aio_flush_cmd); - add_command(&flush_cmd); - add_command(&truncate_cmd); - add_command(&length_cmd); - add_command(&info_cmd); - add_command(&discard_cmd); - add_command(&alloc_cmd); - add_command(&map_cmd); - add_command(&break_cmd); - add_command(&resume_cmd); - add_command(&wait_break_cmd); - add_command(&abort_cmd); - - add_check_command(init_check_command); + qemuio_add_command(&help_cmd); + qemuio_add_command(&read_cmd); + qemuio_add_command(&readv_cmd); + qemuio_add_command(&write_cmd); + qemuio_add_command(&writev_cmd); + qemuio_add_command(&multiwrite_cmd); + qemuio_add_command(&aio_read_cmd); + qemuio_add_command(&aio_write_cmd); + qemuio_add_command(&aio_flush_cmd); + qemuio_add_command(&flush_cmd); + qemuio_add_command(&truncate_cmd); + qemuio_add_command(&length_cmd); + qemuio_add_command(&info_cmd); + qemuio_add_command(&discard_cmd); + qemuio_add_command(&alloc_cmd); + qemuio_add_command(&map_cmd); + qemuio_add_command(&break_cmd); + qemuio_add_command(&resume_cmd); + qemuio_add_command(&wait_break_cmd); + qemuio_add_command(&abort_cmd); } -- cgit v1.2.1